Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright (C) 2012-2014 52North Initiative for Geospatial Open Source
 * Software GmbH
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * If the program is linked with libraries which are licensed under one of
 * the following licenses, the combination of the program with the linked
 * library is not considered a "derivative work" of the program:
 *
 *     - Apache License, version 2.0
 *     - Apache Software License, version 1.0
 *     - GNU Lesser General Public License, version 3
 *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
 *     - Common Development and Distribution License (CDDL), version 1.0
 *
 * Therefore the distribution of the program linked with libraries licensed
 * under the aforementioned licenses, is permitted by the copyright holders
 * if the distribution is compliant with both the GNU General Public
 * License version 2 and the aforementioned licenses.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 */

import java.util.Collection;

import java.util.Map;

import com.google.common.collect.Lists;

public class Main {
    /**
     * Add a value to a map collection, initializing the key's collection if needed
     * 
     * @param key Key whose value collection should be added to
     * @param valueToAdd Vale to add to the key's collection
     * @param map Map holding collections
     */
    public static <K, V> void addToCollectionMap(K key, V valueToAdd, Map<K, Collection<V>> map) {
        if (key == null || valueToAdd == null || map == null) {
            return;
        }
        Collection<V> collection = map.get(key);
        if (collection == null) {
            collection = Lists.newArrayList();
            map.put(key, collection);
        }
        collection.add(valueToAdd);
    }
}