org.eclipse.text/src/org/eclipse/jface/text/TypedRegion.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.jface.text;



/**
 * Default implementation of <code>ITypedRegion</code>.
 */
public class TypedRegion extends Region implements ITypedRegion {
	
	/** The region's type */
	private String fType;
	
	/**
	 * Creates a typed region based on the given specification.
	 *
	 * @param offset the region's offset
	 * @param length the region's length
	 * @param type the region's type
	 */
	public TypedRegion(int offset, int length, String type) {
		super(offset, length);
		fType= type;
	}
	
	/*
	 * @see ITypedRegion#getType()
	 */
	public String getType() {
		return fType;
	}
	
	/**
	 * Two typed positions are equal if they have the same offset, length, and type.
	 *
	 * @see Object#equals(java.lang.Object)
	 */
	public boolean equals(Object o) {
		if (o instanceof TypedRegion) {
			TypedRegion r= (TypedRegion) o;
			return super.equals(r) && ((fType == null && r.getType() == null) || fType.equals(r.getType()));
		}
		return false;
	}
	
	/*
	 * @see Object#hashCode()
	 */
	 public int hashCode() {
	 	int type= fType == null ? 0 : fType.hashCode();
	 	return super.hashCode() | type;
	 }	
}