/
RemoveUnusedImportsStep.java
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/
RemoveUnusedImportsStep.java
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/*
* Copyright 2016-2024 DiffPlug
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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 com.diffplug.spotless.java;
import java.util.List;
import java.util.Objects;
import com.diffplug.spotless.FormatterStep;
import com.diffplug.spotless.Provisioner;
/** Uses google-java-format or cleanthat.UnnecessaryImport, but only to remove unused imports. */
public class RemoveUnusedImportsStep implements java.io.Serializable {
private static final long serialVersionUID = 1L;
private static final String NAME = "removeUnusedImports";
static final String GJF = "google-java-format";
static final String CLEANTHAT = "cleanthat-javaparser-unnecessaryimport";
// https://github.com/solven-eu/cleanthat/blob/master/java/src/main/java/eu/solven/cleanthat/engine/java/refactorer/mutators/UnnecessaryImport.java
private static final String CLEANTHAT_MUTATOR = "UnnecessaryImport";
// prevent direct instantiation
private RemoveUnusedImportsStep() {}
public static String defaultFormatter() {
return GJF;
}
public static FormatterStep create(Provisioner provisioner) {
// The default importRemover is GJF
return create(GJF, provisioner);
}
public static FormatterStep create(String unusedImportRemover, Provisioner provisioner) {
Objects.requireNonNull(provisioner, "provisioner");
switch (unusedImportRemover) {
case GJF:
return GoogleJavaFormatStep.createRemoveUnusedImportsOnly(provisioner);
case CLEANTHAT:
return CleanthatJavaStep.create(CleanthatJavaStep.defaultGroupArtifact(), CleanthatJavaStep.defaultVersion(), "99.9", List.of(CLEANTHAT_MUTATOR), List.of(), false, provisioner);
default:
throw new IllegalArgumentException("Invalid unusedImportRemover: " + unusedImportRemover);
}
}
}