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/*-
* ============LICENSE_START=======================================================
* ONAP - SO
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.so.openpojo.rules;
import static org.hamcrest.CoreMatchers.anyOf;
import static org.hamcrest.CoreMatchers.anything;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
import org.hamcrest.Matcher;
import com.openpojo.reflection.PojoClass;
import com.openpojo.validation.affirm.Affirm;
import com.openpojo.validation.rule.Rule;
/**
* This rule ensures that classes have overriden the default equals and hashCode methods from Object
*/
public class HasEqualsAndHashCodeRule implements Rule {
private final Matcher m;
public HasEqualsAndHashCodeRule() {
m = anything();
}
public HasEqualsAndHashCodeRule(Matcher m) {
this.m = m;
}
@Override
public void evaluate(PojoClass pojoClass) {
Class<?> clazz = pojoClass.getClazz();
if (anyOf(m).matches(clazz)) {
boolean hasEquals = false;
boolean hasHashCode = false;
final String name = clazz.getSimpleName();
final Method[] methods;
if (clazz.getSuperclass().equals(Object.class)) {
methods = clazz.getDeclaredMethods();
} else {
methods = clazz.getMethods();
}
for (Method method : methods) {
Parameter[] parameters = method.getParameters();
if ("equals".equals(method.getName()) && boolean.class.equals(method.getReturnType())
&& parameters.length == 1 && Object.class.equals(parameters[0].getType())) {
hasEquals = true;
} else if ("hashCode".equals(method.getName()) && int.class.equals(method.getReturnType())) {
hasHashCode = true;
}
}
if (!hasEquals) {
Affirm.fail(String.format("[%s] does not override equals", name));
}
if (!hasHashCode) {
Affirm.fail(String.format("[%s] does not override hashCode", name));
}
}
}
}
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