org.openrewrite.java.DeleteMethodArgument Maven / Gradle / Ivy
/*
* Copyright 2020 the original author or authors.
*
* 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
*
* https://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 org.openrewrite.java;
import org.openrewrite.Formatting;
import org.openrewrite.Validated;
import org.openrewrite.java.tree.Expression;
import org.openrewrite.java.tree.J;
import java.util.ArrayList;
import java.util.List;
import static java.util.Collections.singletonList;
import static org.openrewrite.Tree.randomId;
import static org.openrewrite.Validated.required;
public class DeleteMethodArgument extends JavaIsoRefactorVisitor {
private MethodMatcher methodMatcher;
private Integer index;
@Override
public boolean isIdempotent() {
return false;
}
public void setMethod(String method) {
this.methodMatcher = new MethodMatcher(method);
}
public void setIndex(Integer index) {
this.index = index;
}
@Override
public Validated validate() {
return required("method", methodMatcher)
.and(required("index", index));
}
@Override
public J.MethodInvocation visitMethodInvocation(J.MethodInvocation method) {
if(methodMatcher.matches(method)) {
andThen(new Scoped(method, index));
}
return super.visitMethodInvocation(method);
}
public static class Scoped extends JavaIsoRefactorVisitor {
private final J.MethodInvocation scope;
private final int index;
public Scoped(J.MethodInvocation scope, int index) {
this.scope = scope;
this.index = index;
}
@Override
public boolean isIdempotent() {
return false;
}
@Override
public J.MethodInvocation visitMethodInvocation(J.MethodInvocation method) {
List originalArgs = method.getArgs().getArgs();
if (scope.isScope(method) && originalArgs.stream()
.filter(a -> !(a instanceof J.Empty))
.count() >= index + 1) {
List args = new ArrayList<>(method.getArgs().getArgs());
args.remove(index);
if (args.isEmpty()) {
args = singletonList(new J.Empty(randomId(), Formatting.EMPTY));
}
return method.withArgs(method.getArgs().withArgs(args));
}
return super.visitMethodInvocation(method);
}
}
}