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	/*
	* Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code 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
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	/*
	*******************************************************************************
	* (C) Copyright IBM Corp. 1996-2005 - All Rights Reserved *
	* *
	* The original version of this source code and documentation is copyrighted *
	* and owned by IBM, These materials are provided under terms of a License *
	* Agreement between IBM and Sun. This technology is protected by multiple *
	* US and International patents. This notice and attribution to IBM may not *
	* to removed. *
	*******************************************************************************
	*/

	package sun.text.normalizer;

	import java.text.CharacterIterator;

	/**
	* This class is a wrapper around CharacterIterator and implements the
	* UCharacterIterator protocol
	* @author ram
	*/

	public class CharacterIteratorWrapper extends UCharacterIterator {

	private CharacterIterator iterator;

	public CharacterIteratorWrapper(CharacterIterator iter){
	if(iter==null){
	throw new IllegalArgumentException();
	}
	iterator = iter;
	}

	/**
	* @see UCharacterIterator#current()
	*/
	public int current() {
	int c = iterator.current();
	if(c==CharacterIterator.DONE){
	return DONE;
	}
	return c;
	}

	/**
	* @see UCharacterIterator#getLength()
	*/
	public int getLength() {
	return (iterator.getEndIndex() - iterator.getBeginIndex());
	}

	/**
	* @see UCharacterIterator#getIndex()
	*/
	public int getIndex() {
	return iterator.getIndex();
	}

	/**
	* @see UCharacterIterator#next()
	*/
	public int next() {
	int i = iterator.current();
	iterator.next();
	if(i==CharacterIterator.DONE){
	return DONE;
	}
	return i;
	}

	/**
	* @see UCharacterIterator#previous()
	*/
	public int previous() {
	int i = iterator.previous();
	if(i==CharacterIterator.DONE){
	return DONE;
	}
	return i;
	}

	/**
	* @see UCharacterIterator#setIndex(int)
	*/
	public void setIndex(int index) {
	iterator.setIndex(index);
	}

	//// for StringPrep
	/**
	* @see UCharacterIterator#getText(char[])
	*/
	public int getText(char[] fillIn, int offset){
	int length =iterator.getEndIndex() - iterator.getBeginIndex();
	int currentIndex = iterator.getIndex();
	if(offset < 0 \|\| offset + length > fillIn.length){
	throw new IndexOutOfBoundsException(Integer.toString(length));
	}

	for (char ch = iterator.first(); ch != CharacterIterator.DONE; ch = iterator.next()) {
	fillIn[offset++] = ch;
	}
	iterator.setIndex(currentIndex);

	return length;
	}

	/**
	* Creates a clone of this iterator. Clones the underlying character iterator.
	* @see UCharacterIterator#clone()
	*/
	public Object clone(){
	try {
	CharacterIteratorWrapper result = (CharacterIteratorWrapper) super.clone();
	result.iterator = (CharacterIterator)this.iterator.clone();
	return result;
	} catch (CloneNotSupportedException e) {
	return null; // only invoked if bad underlying character iterator
	}
	}
	}

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