bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/commands/ActiveConfiguration.java

/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.ui.internal.commands;

public final class ActiveConfiguration implements Comparable {

	private final static int HASH_FACTOR = 17;
	private final static int HASH_INITIAL = 27;

	public static ActiveConfiguration create(String plugin, String value)
		throws IllegalArgumentException {
		return new ActiveConfiguration(plugin, value);
	}

	private String plugin;
	private String value;
	
	private ActiveConfiguration(String plugin, String value)
		throws IllegalArgumentException {
		super();
		
		if (value == null)
			throw new IllegalArgumentException();
		
		this.plugin = plugin;
		this.value = value;
	}
	
	public int compareTo(Object object) {
		ActiveConfiguration activeConfiguration = (ActiveConfiguration) object;
		int compareTo = Util.compare(plugin, activeConfiguration.plugin);
		
		if (compareTo == 0)		
			compareTo = value.compareTo(activeConfiguration.value);			
		
		return compareTo;	
	}
	
	public boolean equals(Object object) {
		if (!(object instanceof ActiveConfiguration))
			return false;

		ActiveConfiguration activeConfiguration = (ActiveConfiguration) object;	
		return Util.equals(plugin, activeConfiguration.plugin) && value.equals(activeConfiguration.value);
	}

	public String getPlugin() {
		return plugin;
	}

	public String getValue() {
		return value;
	}

	public int hashCode() {
		int result = HASH_INITIAL;
		result = result * HASH_FACTOR + Util.hashCode(plugin);
		result = result * HASH_FACTOR + value.hashCode();
		return result;
	}
	
	public String toString() {
		return value;	
	}
}