Java Object Equal deepEquals(Object o1, Object o2)

Description

Determines if two objects are equal as determined by Object#equals(Object) , or "deeply equal" if both are arrays.

License

Apache License

Declaration

public static boolean deepEquals(Object o1, Object o2) 

Method Source Code

//package com.java2s;
/*/* w w  w .j  a  v  a2 s.  c  o m*/
 * Copyright 2008-2009 LinkedIn, Inc
 * 
 * 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 java.util.Arrays;

public class Main {
    /**
     * Determines if two objects are equal as determined by
     * {@link Object#equals(Object)}, or "deeply equal" if both are arrays.
     * <p>
     * If both objects are null, true is returned; if both objects are array,
     * the corresponding {@link Arrays#deepEquals(Object[], Object[])}, or
     * {@link Arrays#equals(int[], int[])} or the like are called to determine
     * equality.
     * <p>
     * Note that this method does not "deeply" compare the fields of the
     * objects.
     */
    public static boolean deepEquals(Object o1, Object o2) {
        if (o1 == o2) {
            return true;
        }
        if (o1 == null || o2 == null) {
            return false;
        }

        Class<?> type1 = o1.getClass();
        Class<?> type2 = o2.getClass();
        if (!(type1.isArray() && type2.isArray())) {
            return o1.equals(o2);
        }
        if (o1 instanceof Object[] && o2 instanceof Object[]) {
            return Arrays.deepEquals((Object[]) o1, (Object[]) o2);
        }
        if (type1 != type2) {
            return false;
        }
        if (o1 instanceof boolean[]) {
            return Arrays.equals((boolean[]) o1, (boolean[]) o2);
        }
        if (o1 instanceof char[]) {
            return Arrays.equals((char[]) o1, (char[]) o2);
        }
        if (o1 instanceof byte[]) {
            return Arrays.equals((byte[]) o1, (byte[]) o2);
        }
        if (o1 instanceof short[]) {
            return Arrays.equals((short[]) o1, (short[]) o2);
        }
        if (o1 instanceof int[]) {
            return Arrays.equals((int[]) o1, (int[]) o2);
        }
        if (o1 instanceof long[]) {
            return Arrays.equals((long[]) o1, (long[]) o2);
        }
        if (o1 instanceof float[]) {
            return Arrays.equals((float[]) o1, (float[]) o2);
        }
        if (o1 instanceof double[]) {
            return Arrays.equals((double[]) o1, (double[]) o2);
        }
        throw new AssertionError();
    }
}

Related

1. areEqual(final Object x, final Object y)
2. areEqual(Object o1, Object o2)
3. areEqual(Object o1, Object o2)
4. areEqualStr(Object o1, Object o2)
5. equalObjects(Object object1, Object object2)
6. equals(BSONObject a, BSONObject b)
7. equals(final Object a, final Object b)
8. equals(Object a, Object b)