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NoGuavaListsNewLinkedList.java
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NoGuavaListsNewLinkedList.java
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/*
* Copyright 2021 the original author or authors.
* <p>
* 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
* <p>
* https://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.guava;
import org.openrewrite.ExecutionContext;
import org.openrewrite.Preconditions;
import org.openrewrite.Recipe;
import org.openrewrite.TreeVisitor;
import org.openrewrite.java.JavaTemplate;
import org.openrewrite.java.JavaVisitor;
import org.openrewrite.java.MethodMatcher;
import org.openrewrite.java.search.UsesMethod;
import org.openrewrite.java.tree.J;
import org.openrewrite.java.tree.TypeUtils;
import java.util.Collections;
import java.util.Set;
public class NoGuavaListsNewLinkedList extends Recipe {
private static final MethodMatcher NEW_LINKED_LIST = new MethodMatcher("com.google.common.collect.Lists newLinkedList()");
private static final MethodMatcher NEW_LINKED_LIST_ITERABLE = new MethodMatcher("com.google.common.collect.Lists newLinkedList(java.lang.Iterable)");
@Override
public String getDisplayName() {
return "Prefer `new LinkedList<>()`";
}
@Override
public String getDescription() {
return "Prefer the Java standard library over third-party usage of Guava in simple cases like this.";
}
@Override
public Set<String> getTags() {
return Collections.singleton("guava");
}
@Override
public TreeVisitor<?, ExecutionContext> getVisitor() {
return Preconditions.check(Preconditions.or(
new UsesMethod<>(NEW_LINKED_LIST),
new UsesMethod<>(NEW_LINKED_LIST_ITERABLE)), new JavaVisitor<ExecutionContext>() {
@Override
public J visitMethodInvocation(J.MethodInvocation method, ExecutionContext ctx) {
if (NEW_LINKED_LIST.matches(method)) {
maybeRemoveImport("com.google.common.collect.Lists");
maybeAddImport("java.util.LinkedList");
return JavaTemplate.builder("new LinkedList<>()")
.contextSensitive()
.imports("java.util.LinkedList")
.build()
.apply(getCursor(), method.getCoordinates().replace());
} else if (NEW_LINKED_LIST_ITERABLE.matches(method) && method.getArguments().size() == 1 &&
TypeUtils.isAssignableTo("java.util.Collection", method.getArguments().get(0).getType())) {
maybeRemoveImport("com.google.common.collect.Lists");
maybeAddImport("java.util.LinkedList");
return JavaTemplate.builder("new LinkedList<>(#{any(java.util.Collection)})")
.contextSensitive()
.imports("java.util.LinkedList")
.build()
.apply(getCursor(), method.getCoordinates().replace(), method.getArguments().get(0));
}
return super.visitMethodInvocation(method, ctx);
}
});
}
}