Java Collection Element Get getAddedItems(Collection oldValues, Collection newValues)

Description

Find out what elements are added between the oldValues and newValues

License

Apache License

Parameter

Parameter	Description
oldValues	a parameter
newValues	a parameter

Declaration

public static Collection<String> getAddedItems(Collection<String> oldValues, Collection<String> newValues) 

Method Source Code

//package com.java2s;
/*//  www  .ja  v  a 2 s .co m
 * 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.    
 */

import java.util.Collection;
import java.util.Collections;

import java.util.HashSet;

public class Main {
    /**
     * Find out what elements are added between the oldValues and newValues
     * @param oldValues
     * @param newValues
     * @return
     */
    public static Collection<String> getAddedItems(Collection<String> oldValues, Collection<String> newValues) {
        if (newValues == null) {
            newValues = Collections.emptySet();
        }

        Collection<String> deltaInterest = new HashSet<String>(newValues);
        if (oldValues == null) {
            oldValues = Collections.emptySet();
        }
        deltaInterest.removeAll(oldValues);
        return deltaInterest;
    }
}

Related

1. get(Collection collection, int index)
2. get(Collection p_oCol, T p_oObj)
3. get(Collection v, int i)
4. get(final Collection list, final int pos)
5. get(final Collection collection, final int index)
6. getAdditions(Collection source, Collection target)
7. getAll(Map map, Collection indices)
8. getAllDoubleValues( Map>> doubleCollectionWithValuesToFetch)
9. getAllTopicsAsString(final Collection topics)