/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.metamodel.util;
import java.lang.reflect.Array;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A helper class for implementing equals(...) methods.
*/
public final class EqualsBuilder {
private static final Logger logger = LoggerFactory
.getLogger(EqualsBuilder.class);
private boolean equals = true;
public EqualsBuilder append(boolean b) {
logger.debug("append({})", b);
if (equals) {
equals = b;
}
return this;
}
public EqualsBuilder append(Object o1, Object o2) {
if (equals) {
equals = equals(o1, o2);
}
return this;
}
public static boolean equals(final Object obj1, final Object obj2) {
if (obj1 == obj2) {
return true;
}
if (obj1 == null || obj2 == null) {
return false;
}
Class<? extends Object> class1 = obj1.getClass();
Class<? extends Object> class2 = obj2.getClass();
if (class1.isArray()) {
if (!class2.isArray()) {
return false;
} else {
Class<?> componentType1 = class1.getComponentType();
Class<?> componentType2 = class2.getComponentType();
if (!componentType1.equals(componentType2)) {
return false;
}
int length1 = Array.getLength(obj1);
int length2 = Array.getLength(obj2);
if (length1 != length2) {
return false;
}
for (int i = 0; i < length1; i++) {
Object elem1 = Array.get(obj1, i);
Object elem2 = Array.get(obj2, i);
if (!equals(elem1, elem2)) {
return false;
}
}
return true;
}
} else {
if (class2.isArray()) {
return false;
}
}
return obj1.equals(obj2);
}
public boolean isEquals() {
return equals;
}
}