Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright 2002-2016 Jalal Kiswani.
 *
 * 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.Hashtable;
import java.util.List;

public class Main {
    /**
     * Unify the objects in the list according to the hash code IMPORTANT :
     * hashcode usage here is different from the Java Spec , IT SHOULD BE
     * UNIUQUE FOR EACH OBJECT WHICH SHOULD HOLD SOMTHING LIKE THE DATABASE
     * PRIMARY KEY.
     *
     * @param hash
     *            the hash
     * @param list
     *            the list
     */
    public static void unifyReferences(final Hashtable hash, final List list) {
        if (list != null) {
            for (int i = 0; i < list.size(); i++) {
                final Object itemAtList = list.get(i);
                final Object unifiedReferences = unifyReferences(hash, itemAtList);
                list.set(i, unifiedReferences);
            }
        }
    }

    /**
     * return unified reference.
     *
     * @param hash
     *            the hash
     * @param object
     *            the object
     * @return the object
     */
    public static Object unifyReferences(final Hashtable hash, Object object) {
        final Object itemAtHash = hash.get(object.hashCode());
        if (itemAtHash == null) {
            hash.put(object.hashCode(), object);
        } else {
            object = itemAtHash;
        }
        return object;
    }
}