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/*
* Copyright (c) 2012, the Last.fm Java Project and Committers All rights
* reserved. Redistribution and use of this software in source and binary forms,
* with or without modification, are permitted provided that the following
* conditions are met: - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following disclaimer. -
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution. THIS SOFTWARE IS
* PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.cyanogenmod.eleven.lastfm;
import java.util.Map;
/**
* Utility class to perform various operations on Maps.
*
* @author Adrian Woodhead
*/
public final class MapUtilities {
private MapUtilities() {
}
/**
* Puts the passed key and value into the map only if the value is not null.
*
* @param map Map to add key and value to.
* @param key Map key.
* @param value Map value, if null will not be added to map.
*/
public static void nullSafePut(final Map<String, String> map, final String key,
final String value) {
if (value != null) {
map.put(key, value);
}
}
/**
* Puts the passed key and value into the map only if the value is not null.
*
* @param map Map to add key and value to.
* @param key Map key.
* @param value Map value, if null will not be added to map.
*/
public static void nullSafePut(final Map<String, String> map, final String key,
final Integer value) {
if (value != null) {
map.put(key, value.toString());
}
}
/**
* Puts the passed key and value into the map only if the value is not -1.
*
* @param map Map to add key and value to.
* @param key Map key.
* @param value Map value, if -1 will not be added to map.
*/
public static void nullSafePut(final Map<String, String> map, final String key, final int value) {
if (value != -1) {
map.put(key, Integer.toString(value));
}
}
/**
* Puts the passed key and value into the map only if the value is not -1.
*
* @param map Map to add key and value to.
* @param key Map key.
* @param value Map value, if -1 will not be added to map.
*/
public static void nullSafePut(final Map<String, String> map, final String key,
final double value) {
if (value != -1) {
map.put(key, Double.toString(value));
}
}
}
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