/* * 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; /** * DLF docs must define behavior when Replaceable is mutated underneath * the iterator. * * This and ICUCharacterIterator share some code, maybe they should share * an implementation, or the common state and implementation should be * moved up into UCharacterIterator. * * What are first, last, and getBeginIndex doing here?!?!?! */public class ReplaceableUCharacterIterator extends UCharacterIterator {     // public constructor ------------------------------------------------------     /**     * Public constructor     * @param str text which the iterator will be based on     */    public ReplaceableUCharacterIterator(String str){        if(str==null){            throw new IllegalArgumentException();        }        this.replaceable  = new ReplaceableString(str);        this.currentIndex = 0;    }     //// for StringPrep    /**     * Public constructor     * @param buf buffer of text on which the iterator will be based     */    public ReplaceableUCharacterIterator(StringBuffer buf){        if(buf==null){            throw new IllegalArgumentException();        }        this.replaceable  = new ReplaceableString(buf);        this.currentIndex = 0;    }     // public methods ----------------------------------------------------------     /**     * Creates a copy of this iterator, does not clone the underlying     * <code>Replaceable</code>object     * @return copy of this iterator     */    public Object clone(){        try {          return super.clone();        } catch (CloneNotSupportedException e) {            return null; // never invoked        }    }     /**     * Returns the current UTF16 character.     * @return current UTF16 character     */    public int current(){        if (currentIndex < replaceable.length()) {            return replaceable.charAt(currentIndex);        }        return DONE;    }     /**     * Returns the length of the text     * @return length of the text     */    public int getLength(){        return replaceable.length();    }     /**     * Gets the current currentIndex in text.     * @return current currentIndex in text.     */    public int getIndex(){        return currentIndex;    }     /**     * Returns next UTF16 character and increments the iterator's currentIndex by 1.     * If the resulting currentIndex is greater or equal to the text length, the     * currentIndex is reset to the text length and a value of DONECODEPOINT is     * returned.     * @return next UTF16 character in text or DONE if the new currentIndex is off the     *         end of the text range.     */    public int next(){        if (currentIndex < replaceable.length()) {            return replaceable.charAt(currentIndex++);        }        return DONE;    }      /**     * Returns previous UTF16 character and decrements the iterator's currentIndex by     * 1.     * If the resulting currentIndex is less than 0, the currentIndex is reset to 0 and a     * value of DONECODEPOINT is returned.     * @return next UTF16 character in text or DONE if the new currentIndex is off the     *         start of the text range.     */    public int previous(){        if (currentIndex > 0) {            return replaceable.charAt(--currentIndex);        }        return DONE;    }     /**     * <p>Sets the currentIndex to the specified currentIndex in the text and returns that     * single UTF16 character at currentIndex.     * This assumes the text is stored as 16-bit code units.</p>     * @param currentIndex the currentIndex within the text.     * @exception IllegalArgumentException is thrown if an invalid currentIndex is     *            supplied. i.e. currentIndex is out of bounds.     * @return the character at the specified currentIndex or DONE if the specified     *         currentIndex is equal to the end of the text.     */    public void setIndex(int currentIndex) {        if (currentIndex < 0 || currentIndex > replaceable.length()) {            throw new IllegalArgumentException();        }        this.currentIndex = currentIndex;    }     //// for StringPrep    public int getText(char[] fillIn, int offset){        int length = replaceable.length();        if(offset < 0 || offset + length > fillIn.length){            throw new IndexOutOfBoundsException(Integer.toString(length));        }        replaceable.getChars(0,length,fillIn,offset);        return length;    }     // private data members ----------------------------------------------------     /**     * Replacable object     */    private Replaceable replaceable;    /**     * Current currentIndex     */    private int currentIndex; }