org.eclipse.jface.viewers.deferred.IntHashMap Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2004, 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.viewers.deferred;
import java.io.Serializable;
import java.util.HashMap;
/**
* Represents a map of objects onto ints. This is intended for future optimization:
* using int primitives would allow for an implementation that doesn't require
* additional object allocations for Integers. However, the current implementation
* simply delegates to the Java HashMap class.
*
* @since 1.0
*/
/* package */ class IntHashMap implements Serializable {
private HashMap map;
/**
* @param size
* @param loadFactor
*/
public IntHashMap(int size, float loadFactor) {
map = new HashMap(size, loadFactor);
}
/**
*
*/
public IntHashMap() {
map = new HashMap();
}
/**
* @param key
*/
public void remove(Object key) {
map.remove(key);
}
/**
* @param key
* @param value
*/
public void put(Object key, int value) {
map.put(key, new Integer(value));
}
/**
* @param key
* @return the int value at the given key
*/
public int get(Object key) {
return get(key, 0);
}
/**
* @param key
* @param defaultValue
* @return the int value at the given key, or the default value if this map does not contain the given key
*/
public int get(Object key, int defaultValue) {
Integer result = (Integer)map.get(key);
if (result != null) {
return result.intValue();
}
return defaultValue;
}
/**
* @param key
* @return true if this map contains the given key, false otherwise
*/
public boolean containsKey(Object key) {
return map.containsKey(key);
}
/**
* @return the number of key/value pairs
*/
public int size() {
return map.size();
}
}