| /* |
| ******************************************************************************* |
| * Copyright (C) 1996-2004, International Business Machines Corporation and * |
| * others. All Rights Reserved. * |
| ******************************************************************************* |
| */ |
| package com.ibm.icu.impl; |
| |
| import java.text.CharacterIterator; |
| |
| import com.ibm.icu.text.*; |
| |
| /** |
| * 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) { |
| try{ |
| iterator.setIndex(index); |
| }catch(IllegalArgumentException e){ |
| throw new IndexOutOfBoundsException(); |
| } |
| } |
| |
| /** |
| * @see UCharacterIterator#setToLimit() |
| */ |
| public void setToLimit() { |
| iterator.setIndex(iterator.getEndIndex()); |
| } |
| |
| /** |
| * @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 |
| } |
| } |
| |
| |
| public int moveIndex(int delta){ |
| int length = iterator.getEndIndex() - iterator.getBeginIndex(); |
| int idx = iterator.getIndex()+delta; |
| |
| if(idx < 0) { |
| idx = 0; |
| } else if(idx > length) { |
| idx = length; |
| } |
| return iterator.setIndex(idx); |
| } |
| |
| /** |
| * @see UCharacterIterator#getCharacterIterator() |
| */ |
| public CharacterIterator getCharacterIterator(){ |
| return (CharacterIterator)iterator.clone(); |
| } |
| } |