diff --git a/src/main/java/org/openrewrite/java/migrate/nio/file/RedundantUtf8Charset.java b/src/main/java/org/openrewrite/java/migrate/nio/file/RedundantUtf8Charset.java new file mode 100644 index 0000000000..a4be047832 --- /dev/null +++ b/src/main/java/org/openrewrite/java/migrate/nio/file/RedundantUtf8Charset.java @@ -0,0 +1,109 @@ +/* + * Copyright 2026 the original author or authors. + *

+ * Licensed under the Moderne Source Available License (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + *

+ * https://docs.moderne.io/licensing/moderne-source-available-license + *

+ * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.openrewrite.java.migrate.nio.file; + +import lombok.Getter; +import org.openrewrite.ExecutionContext; +import org.openrewrite.Preconditions; +import org.openrewrite.Recipe; +import org.openrewrite.TreeVisitor; +import org.openrewrite.java.JavaIsoVisitor; +import org.openrewrite.java.MethodMatcher; +import org.openrewrite.java.search.UsesType; +import org.openrewrite.java.tree.Expression; +import org.openrewrite.java.tree.J; +import org.openrewrite.java.tree.JavaType; +import org.openrewrite.java.tree.TypeUtils; + +import java.util.ArrayList; +import java.util.List; + +public class RedundantUtf8Charset extends Recipe { + + private static final List MATCHERS = new ArrayList<>(); + + static { + for (String signature : new String[]{ + "java.nio.file.Files readString(java.nio.file.Path, java.nio.charset.Charset)", + "java.nio.file.Files writeString(java.nio.file.Path, java.lang.CharSequence, java.nio.charset.Charset, ..)", + "java.nio.file.Files readAllLines(java.nio.file.Path, java.nio.charset.Charset)", + "java.nio.file.Files write(java.nio.file.Path, java.lang.Iterable, java.nio.charset.Charset, ..)", + "java.nio.file.Files lines(java.nio.file.Path, java.nio.charset.Charset)", + "java.nio.file.Files newBufferedReader(java.nio.file.Path, java.nio.charset.Charset)", + "java.nio.file.Files newBufferedWriter(java.nio.file.Path, java.nio.charset.Charset, ..)"}) { + MATCHERS.add(new MethodMatcher(signature)); + } + } + + @Getter + final String displayName = "Remove redundant `StandardCharsets.UTF_8` from `java.nio.file.Files` method calls"; + + @Getter + final String description = "The character based `java.nio.file.Files` methods always default to UTF-8, so passing " + + "`StandardCharsets.UTF_8` explicitly is redundant and can be removed."; + + @Override + public TreeVisitor getVisitor() { + return Preconditions.check(new UsesType<>("java.nio.charset.StandardCharsets", false), new JavaIsoVisitor() { + @Override + public J.MethodInvocation visitMethodInvocation(J.MethodInvocation method, ExecutionContext ctx) { + J.MethodInvocation mi = super.visitMethodInvocation(method, ctx); + if (MATCHERS.stream().noneMatch(m -> m.matches(mi))) { + return mi; + } + List arguments = mi.getArguments(); + for (int i = 0; i < arguments.size(); i++) { + if (isUtf8(arguments.get(i))) { + List newArguments = new ArrayList<>(arguments); + newArguments.remove(i); + maybeRemoveImport("java.nio.charset.StandardCharsets"); + + JavaType.Method methodType = mi.getMethodType(); + if (methodType != null && i < methodType.getParameterTypes().size()) { + List parameterTypes = new ArrayList<>(methodType.getParameterTypes()); + List parameterNames = new ArrayList<>(methodType.getParameterNames()); + parameterTypes.remove(i); + parameterNames.remove(i); + methodType = methodType.withParameterTypes(parameterTypes).withParameterNames(parameterNames); + } + return mi.withArguments(newArguments) + .withMethodType(methodType) + .withName(mi.getName().withType(methodType)); + } + } + return mi; + } + + private boolean isUtf8(Expression argument) { + if (!TypeUtils.isOfClassType(argument.getType(), "java.nio.charset.Charset")) { + return false; + } + if (argument instanceof J.FieldAccess) { + J.FieldAccess fieldAccess = (J.FieldAccess) argument; + return "UTF_8".equals(fieldAccess.getSimpleName()) && + TypeUtils.isOfClassType(fieldAccess.getTarget().getType(), "java.nio.charset.StandardCharsets"); + } + if (argument instanceof J.Identifier) { + J.Identifier identifier = (J.Identifier) argument; + JavaType.Variable fieldType = identifier.getFieldType(); + return "UTF_8".equals(identifier.getSimpleName()) && fieldType != null && + TypeUtils.isOfClassType(fieldType.getOwner(), "java.nio.charset.StandardCharsets"); + } + return false; + } + }); + } +} diff --git a/src/main/java/org/openrewrite/java/migrate/nio/file/package-info.java b/src/main/java/org/openrewrite/java/migrate/nio/file/package-info.java new file mode 100644 index 0000000000..acb9e1d728 --- /dev/null +++ b/src/main/java/org/openrewrite/java/migrate/nio/file/package-info.java @@ -0,0 +1,21 @@ +/* + * Copyright 2026 the original author or authors. + *

+ * Licensed under the Moderne Source Available License (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + *

+ * https://docs.moderne.io/licensing/moderne-source-available-license + *

+ * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +@NullMarked +@NonNullFields +package org.openrewrite.java.migrate.nio.file; + +import org.jspecify.annotations.NullMarked; +import org.openrewrite.internal.lang.NonNullFields; diff --git a/src/main/resources/META-INF/rewrite/java-version-11.yml b/src/main/resources/META-INF/rewrite/java-version-11.yml index 694c4ae587..ac461ae7bb 100644 --- a/src/main/resources/META-INF/rewrite/java-version-11.yml +++ b/src/main/resources/META-INF/rewrite/java-version-11.yml @@ -57,6 +57,7 @@ recipeList: - org.openrewrite.java.migrate.lombok.UpdateLombokToJava11 - org.openrewrite.java.migrate.net.JavaNetAPIs - org.openrewrite.java.migrate.nio.file.PathsGetToPathOf + - org.openrewrite.java.migrate.nio.file.RedundantUtf8Charset - org.openrewrite.java.migrate.sql.JavaSqlAPIs - org.openrewrite.java.migrate.javax.JavaxLangModelUtil - org.openrewrite.java.migrate.javax.JavaxManagementMonitorAPIs diff --git a/src/main/resources/META-INF/rewrite/recipes.csv b/src/main/resources/META-INF/rewrite/recipes.csv index 352ab78f0f..8025ba6854 100644 --- a/src/main/resources/META-INF/rewrite/recipes.csv +++ b/src/main/resources/META-INF/rewrite/recipes.csv @@ -47,8 +47,8 @@ maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.J maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.JREJdbcInterfaceNewMethods,Adds missing JDBC interface methods,Add method implementations stubs to classes that implement JDBC interfaces.,10,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,, maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.JREThrowableFinalMethods,Rename final method declarations `getSuppressed()` and `addSuppressed(Throwable exception)` in classes that extend `Throwable`,The recipe renames `getSuppressed()` and `addSuppressed(Throwable exception)` methods in classes that extend `java.lang.Throwable` to `myGetSuppressed` and `myAddSuppressed(Throwable)`. These methods were added to Throwable in Java 7 and are marked final which cannot be overridden.,1,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,, maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.JREWrapperInterface,Add missing `isWrapperFor` and `unwrap` methods,Add method implementations stubs to classes that implement `java.sql.Wrapper`.,3,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,, -maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.Java8toJava11,Migrate to Java 11,"This recipe will apply changes commonly needed when upgrading to Java 11. Specifically, for those applications that are built on Java 8, this recipe will update and add dependencies on J2EE libraries that are no longer directly bundled with the JDK. This recipe will also replace deprecated API with equivalents when there is a clear migration strategy. Build files will also be updated to use Java 11 as the target/source and plugins will be also be upgraded to versions that are compatible with Java 11.",255,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" -maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.JavaBestPractices,Java best practices,"Applies opinionated best practices for Java projects targeting Java 25. This recipe includes the full Java 25 upgrade chain plus additional improvements to code style, API usage, and third-party dependency reduction that go beyond what the version migration recipes apply.",1680,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" +maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.Java8toJava11,Migrate to Java 11,"This recipe will apply changes commonly needed when upgrading to Java 11. Specifically, for those applications that are built on Java 8, this recipe will update and add dependencies on J2EE libraries that are no longer directly bundled with the JDK. This recipe will also replace deprecated API with equivalents when there is a clear migration strategy. Build files will also be updated to use Java 11 as the target/source and plugins will be also be upgraded to versions that are compatible with Java 11.",256,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" +maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.JavaBestPractices,Java best practices,"Applies opinionated best practices for Java projects targeting Java 25. This recipe includes the full Java 25 upgrade chain plus additional improvements to code style, API usage, and third-party dependency reduction that go beyond what the version migration recipes apply.",1681,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.JpaCacheProperties,Disable the persistence unit second-level cache,Sets an explicit value for the shared cache mode.,1,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,, maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.Jre17AgentMainPreMainPublic,Set visibility of `premain` and `agentmain` methods to `public`,Check for a behavior change in Java agents.,5,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,, maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.Krb5LoginModuleClass,Use `com.sun.security.auth.module.Krb5LoginModule` instead of `com.ibm.security.auth.module.Krb5LoginModule`,Do not use the `com.ibm.security.auth.module.Krb5LoginModule` class.,2,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,, @@ -96,9 +96,9 @@ maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.U maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.UpgradePluginsForJava17,Upgrade plugins to Java 17 compatible versions,Updates plugins to version compatible with Java 17.,8,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.UpgradePluginsForJava21,Upgrade plugins to Java 21 compatible versions,Updates plugins and dependencies to version compatible with Java 21.,6,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.UpgradePluginsForJava25,Upgrade plugins to Java 25 compatible versions,Updates plugins and dependencies to versions compatible with Java 25.,10,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" -maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.UpgradeToJava17,Migrate to Java 17,"This recipe will apply changes commonly needed when migrating to Java 17. Specifically, for those applications that are built on Java 8, this recipe will update and add dependencies on J2EE libraries that are no longer directly bundled with the JDK. This recipe will also replace deprecated API with equivalents when there is a clear migration strategy. Build files will also be updated to use Java 17 as the target/source and plugins will be also be upgraded to versions that are compatible with Java 17.",416,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" -maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.UpgradeToJava21,Migrate to Java 21,This recipe will apply changes commonly needed when migrating to Java 21. This recipe will also replace deprecated API with equivalents when there is a clear migration strategy. Build files will also be updated to use Java 21 as the target/source and plugins will be also be upgraded to versions that are compatible with Java 21.,592,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" -maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.UpgradeToJava25,Migrate to Java 25,This recipe will apply changes commonly needed when migrating to Java 25. This recipe will also replace deprecated API with equivalents when there is a clear migration strategy. Build files will also be updated to use Java 25 as the target/source and plugins will be also be upgraded to versions that are compatible with Java 25.,1328,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" +maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.UpgradeToJava17,Migrate to Java 17,"This recipe will apply changes commonly needed when migrating to Java 17. Specifically, for those applications that are built on Java 8, this recipe will update and add dependencies on J2EE libraries that are no longer directly bundled with the JDK. This recipe will also replace deprecated API with equivalents when there is a clear migration strategy. Build files will also be updated to use Java 17 as the target/source and plugins will be also be upgraded to versions that are compatible with Java 17.",417,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" +maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.UpgradeToJava21,Migrate to Java 21,This recipe will apply changes commonly needed when migrating to Java 21. This recipe will also replace deprecated API with equivalents when there is a clear migration strategy. Build files will also be updated to use Java 21 as the target/source and plugins will be also be upgraded to versions that are compatible with Java 21.,593,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" +maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.UpgradeToJava25,Migrate to Java 25,This recipe will apply changes commonly needed when migrating to Java 25. This recipe will also replace deprecated API with equivalents when there is a clear migration strategy. Build files will also be updated to use Java 25 as the target/source and plugins will be also be upgraded to versions that are compatible with Java 25.,1329,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.UpgradeToJava6,Migrate to Java 6,This recipe will apply changes commonly needed when upgrading to Java 6. This recipe will also replace deprecated API with equivalents when there is a clear migration strategy.,7,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.UpgradeToJava7,Migrate to Java 7,This recipe will apply changes commonly needed when upgrading to Java 7. This recipe will also replace deprecated API with equivalents when there is a clear migration strategy.,28,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.UpgradeToJava8,Migrate to Java 8,This recipe will apply changes commonly needed when upgrading to Java 8. This recipe will also replace deprecated API with equivalents when there is a clear migration strategy.,54,,,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,,"[{""name"":""org.openrewrite.maven.table.MavenMetadataFailures"",""displayName"":""Maven metadata failures"",""instanceName"":""Maven metadata failures"",""description"":""Attempts to resolve maven metadata that failed."",""columns"":[{""name"":""group"",""type"":""String"",""displayName"":""Group id"",""description"":""The groupId of the artifact for which the metadata download failed.""},{""name"":""artifactId"",""type"":""String"",""displayName"":""Artifact id"",""description"":""The artifactId of the artifact for which the metadata download failed.""},{""name"":""version"",""type"":""String"",""displayName"":""Version"",""description"":""The version of the artifact for which the metadata download failed.""},{""name"":""mavenRepositoryUri"",""type"":""String"",""displayName"":""Maven repository"",""description"":""The URL of the Maven repository that the metadata download failed on.""},{""name"":""snapshots"",""type"":""String"",""displayName"":""Snapshots"",""description"":""Does the repository support snapshots.""},{""name"":""releases"",""type"":""String"",""displayName"":""Releases"",""description"":""Does the repository support releases.""},{""name"":""failure"",""type"":""String"",""displayName"":""Failure"",""description"":""The reason the metadata download failed.""}]}]" @@ -458,6 +458,7 @@ maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.n maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.net.URLConstructorToURICreate,Convert `new URL(String)` to `URI.create(String).toURL()`,Converts `new URL(String)` constructor to `URI.create(String).toURL()`. The URL constructor has been deprecated due to security vulnerabilities when handling malformed URLs. Using `URI.create(String)` provides stronger validation and safer URL handling in modern Java applications.,1,,`java.net` APIs,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,, maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.net.URLConstructorsToNewURI,"Convert `new URL(String, ..)` to `new URI(String, ..).toURL()`","Converts `new URL(String, ..)` constructors to `new URI(String, ..).toURL()`.",1,,`java.net` APIs,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,, maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.nio.file.PathsGetToPathOf,Replace `Paths.get` with `Path.of`,The `java.nio.file.Paths.get` method was introduced in Java SE 7. The `java.nio.file.Path.of` method was introduced in Java SE 11. This recipe replaces all usages of `Paths.get` with `Path.of` for consistency.,3,File,Nio,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,, +maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.nio.file.RedundantUtf8Charset,Remove redundant `StandardCharsets.UTF_8` from `java.nio.file.Files` method calls,"The character based `java.nio.file.Files` methods always default to UTF-8, so passing `StandardCharsets.UTF_8` explicitly is redundant and can be removed.",1,File,Nio,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,, maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.search.AboutJavaVersion,Find which Java version is in use,A diagnostic for studying the distribution of Java language version levels (both source and target compatibility across files and source sets).,1,,Search,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,"[{""name"":""whenUsesType"",""type"":""String"",""description"":""Only mark the Java version when this type is in use."",""example"":""lombok.val""}]","[{""name"":""org.openrewrite.java.migrate.table.JavaVersionPerSourceSet"",""displayName"":""Java versions by source set"",""instanceName"":""Java versions by source set"",""description"":""A per-source set view of Java version in use."",""columns"":[{""name"":""projectName"",""type"":""String"",""displayName"":""Project name"",""description"":""The module name (useful especially for multi-module repositories).""},{""name"":""sourceSetName"",""type"":""String"",""displayName"":""Source set name"",""description"":""The source set, e.g. `main` or `test`.""},{""name"":""createdBy"",""type"":""String"",""displayName"":""Created by"",""description"":""The JDK release that was used to compile the source file.""},{""name"":""vmVendor"",""type"":""String"",""displayName"":""VM vendor"",""description"":""The vendor of the JVM that was used to compile the source file.""},{""name"":""sourceCompatibility"",""type"":""String"",""displayName"":""Source compatibility"",""description"":""The source compatibility of the source file.""},{""name"":""majorVersionSourceCompatibility"",""type"":""String"",""displayName"":""Major version source compatibility"",""description"":""The major version.""},{""name"":""targetCompatibility"",""type"":""String"",""displayName"":""Target compatibility"",""description"":""The target compatibility or `--release` version of the source file.""}]}]" maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.search.FindDataUsedOnDto,Find data used on DTOs,Find data elements used on DTOs. This is useful to provide information where data over-fetching may be a problem.,1,,Search,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,"[{""name"":""dtoType"",""type"":""String"",""displayName"":""DTO type"",""description"":""The fully qualified name of the DTO."",""example"":""com.example.dto.*"",""required"":true}]","[{""name"":""org.openrewrite.java.migrate.table.DtoDataUses"",""displayName"":""Uses of the data elements of a DTO"",""instanceName"":""Uses of the data elements of a DTO"",""description"":""The use of the data elements of a DTO by the method declaration using it.""}]" maven,org.openrewrite.recipe:rewrite-migrate-java,org.openrewrite.java.migrate.search.FindDtoOverfetching,Find methods that only use one DTO data element,Find methods that have 'opportunities' for improvement.,1,,Search,Modernize,Java,,,Modernize your code to best use the project's current JDK version. Take advantage of newly available APIs and reduce the dependency of your code on third party dependencies where there is equivalent functionality in the Java standard library.,Basic building blocks for transforming Java code.,"[{""name"":""dtoType"",""type"":""String"",""displayName"":""DTO type"",""description"":""The fully qualified name of the DTO."",""example"":""com.example.dto.*"",""required"":true}]", diff --git a/src/test/java/org/openrewrite/java/migrate/nio/file/RedundantUtf8CharsetTest.java b/src/test/java/org/openrewrite/java/migrate/nio/file/RedundantUtf8CharsetTest.java new file mode 100644 index 0000000000..9153f0c712 --- /dev/null +++ b/src/test/java/org/openrewrite/java/migrate/nio/file/RedundantUtf8CharsetTest.java @@ -0,0 +1,264 @@ +/* + * Copyright 2026 the original author or authors. + *

+ * Licensed under the Moderne Source Available License (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + *

+ * https://docs.moderne.io/licensing/moderne-source-available-license + *

+ * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.openrewrite.java.migrate.nio.file; + +import org.junit.jupiter.api.Test; +import org.openrewrite.DocumentExample; +import org.openrewrite.test.RecipeSpec; +import org.openrewrite.test.RewriteTest; + +import static org.openrewrite.java.Assertions.java; + +class RedundantUtf8CharsetTest implements RewriteTest { + + @Override + public void defaults(RecipeSpec spec) { + spec.recipe(new RedundantUtf8Charset()); + } + + @DocumentExample + @Test + void readString() { + //language=java + rewriteRun( + java( + """ + import java.io.IOException; + import java.nio.charset.StandardCharsets; + import java.nio.file.Files; + import java.nio.file.Path; + + class Test { + String read(Path path) throws IOException { + return Files.readString(path, StandardCharsets.UTF_8); + } + } + """, + """ + import java.io.IOException; + import java.nio.file.Files; + import java.nio.file.Path; + + class Test { + String read(Path path) throws IOException { + return Files.readString(path); + } + } + """ + ) + ); + } + + @Test + void writeStringWithOpenOptions() { + //language=java + rewriteRun( + java( + """ + import java.io.IOException; + import java.nio.charset.StandardCharsets; + import java.nio.file.Files; + import java.nio.file.Path; + import java.nio.file.StandardOpenOption; + + class Test { + void write(Path path, String content) throws IOException { + Files.writeString(path, content, StandardCharsets.UTF_8, StandardOpenOption.APPEND); + } + } + """, + """ + import java.io.IOException; + import java.nio.file.Files; + import java.nio.file.Path; + import java.nio.file.StandardOpenOption; + + class Test { + void write(Path path, String content) throws IOException { + Files.writeString(path, content, StandardOpenOption.APPEND); + } + } + """ + ) + ); + } + + @Test + void readAllLines() { + //language=java + rewriteRun( + java( + """ + import java.io.IOException; + import java.nio.charset.StandardCharsets; + import java.nio.file.Files; + import java.nio.file.Path; + import java.util.List; + + class Test { + List read(Path path) throws IOException { + return Files.readAllLines(path, StandardCharsets.UTF_8); + } + } + """, + """ + import java.io.IOException; + import java.nio.file.Files; + import java.nio.file.Path; + import java.util.List; + + class Test { + List read(Path path) throws IOException { + return Files.readAllLines(path); + } + } + """ + ) + ); + } + + @Test + void newBufferedReaderAndWriter() { + //language=java + rewriteRun( + java( + """ + import java.io.BufferedReader; + import java.io.BufferedWriter; + import java.io.IOException; + import java.nio.charset.StandardCharsets; + import java.nio.file.Files; + import java.nio.file.Path; + + class Test { + BufferedReader reader(Path path) throws IOException { + return Files.newBufferedReader(path, StandardCharsets.UTF_8); + } + + BufferedWriter writer(Path path) throws IOException { + return Files.newBufferedWriter(path, StandardCharsets.UTF_8); + } + } + """, + """ + import java.io.BufferedReader; + import java.io.BufferedWriter; + import java.io.IOException; + import java.nio.file.Files; + import java.nio.file.Path; + + class Test { + BufferedReader reader(Path path) throws IOException { + return Files.newBufferedReader(path); + } + + BufferedWriter writer(Path path) throws IOException { + return Files.newBufferedWriter(path); + } + } + """ + ) + ); + } + + @Test + void staticImportedUtf8() { + //language=java + rewriteRun( + java( + """ + import java.io.IOException; + import java.nio.file.Files; + import java.nio.file.Path; + + import static java.nio.charset.StandardCharsets.UTF_8; + + class Test { + String read(Path path) throws IOException { + return Files.readString(path, UTF_8); + } + } + """, + """ + import java.io.IOException; + import java.nio.file.Files; + import java.nio.file.Path; + + class Test { + String read(Path path) throws IOException { + return Files.readString(path); + } + } + """ + ) + ); + } + + @Test + void writeLines() { + //language=java + rewriteRun( + java( + """ + import java.io.IOException; + import java.nio.charset.StandardCharsets; + import java.nio.file.Files; + import java.nio.file.Path; + import java.util.List; + + class Test { + void write(Path path, List lines) throws IOException { + Files.write(path, lines, StandardCharsets.UTF_8); + } + } + """, + """ + import java.io.IOException; + import java.nio.file.Files; + import java.nio.file.Path; + import java.util.List; + + class Test { + void write(Path path, List lines) throws IOException { + Files.write(path, lines); + } + } + """ + ) + ); + } + + @Test + void doNotChangeNonUtf8Charset() { + //language=java + rewriteRun( + java( + """ + import java.io.IOException; + import java.nio.charset.StandardCharsets; + import java.nio.file.Files; + import java.nio.file.Path; + + class Test { + String read(Path path) throws IOException { + return Files.readString(path, StandardCharsets.ISO_8859_1); + } + } + """ + ) + ); + } +}