com.alibaba.p3c.pmd.lang.java.rule.set.EqualsHashCodeRule Maven / Gradle / Ivy
package com.alibaba.p3c.pmd.lang.java.rule.set;
/*
* Copyright 1999-2017 Alibaba Group.
*
* 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.
*/
import com.alibaba.p3c.pmd.lang.java.rule.AbstractAliRule;
import net.sourceforge.pmd.lang.ast.Node;
import net.sourceforge.pmd.lang.java.ast.ASTCompilationUnit;
import org.jaxen.JaxenException;
import java.util.List;
/**
* [Mendatory] Equals method must be with hashCode() method.
*
* @author leonard99559
* @date 2019/10/16
*/
public class EqualsHashCodeRule extends AbstractAliRule {
@Override
public Object visit(ASTCompilationUnit rootNode, Object data) {
try {
List nodeList = rootNode.findChildNodesWithXPath(
"//ClassOrInterfaceBodyDeclaration[./Annotation[@AnnotationName = 'Override']]" +
"//MethodDeclaration[@MethodName = 'hashCode' or @MethodName = 'equals']");
if (nodeList.size() == 1) {
addViolationWithMessage(data, nodeList.get(0),
"java.set.EqualsHashCodeRule.rule.msg");
}
} catch (JaxenException e) {
e.printStackTrace();
}
return super.visit(rootNode, data);
}
}