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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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/*
 *******************************************************************************
 * Copyright (C) 1996-2009, International Business Machines Corporation and    *
 * others. All Rights Reserved.                                                *
 *******************************************************************************
 */

package sun.text.normalizer;

ReplaceableString is an adapter class that implements the
Replaceable API around an ordinary StringBuffer.
Note: This class does not support attributes and is not intended for general use. Most clients will need to implement Replaceable in their text representation class. 
Copyright © IBM Corporation 1999.  All rights reserved.
Author:
Alan Liu
See Also:
Replaceable
@stable
ICU 2.0/**
 * <code>ReplaceableString</code> is an adapter class that implements the
 * <code>Replaceable</code> API around an ordinary <code>StringBuffer</code>.
 *
 * <p><em>Note:</em> This class does not support attributes and is not
 * intended for general use.  Most clients will need to implement
 * {@link Replaceable} in their text representation class.
 *
 * <p>Copyright &copy; IBM Corporation 1999.  All rights reserved.
 *
 * @see Replaceable
 * @author Alan Liu
 * @stable ICU 2.0
 */
class ReplaceableString implements Replaceable {

    private StringBuffer buf;

    
Construct a new object with the given initial contents.
Params:
str – initial contents
@stable
ICU 2.0/**
     * Construct a new object with the given initial contents.
     * @param str initial contents
     * @stable ICU 2.0
     */
    public ReplaceableString(String str) {
        buf = new StringBuffer(str);
    }

    
Construct a new object using buf for internal
storage.  The contents of buf at the time of
construction are used as the initial contents.  Note!
Modifications to buf will modify this object, and
vice versa.
Params:
buf – object to be used as internal storage
@stable
ICU 2.0/**
     * Construct a new object using <code>buf</code> for internal
     * storage.  The contents of <code>buf</code> at the time of
     * construction are used as the initial contents.  <em>Note!
     * Modifications to <code>buf</code> will modify this object, and
     * vice versa.</em>
     * @param buf object to be used as internal storage
     * @stable ICU 2.0
     */
    public ReplaceableString(StringBuffer buf) {
        this.buf = buf;
    }

    
Return the number of characters contained in this object.
Replaceable API.
@stable
ICU 2.0/**
     * Return the number of characters contained in this object.
     * <code>Replaceable</code> API.
     * @stable ICU 2.0
     */
    public int length() {
        return buf.length();
    }

    
Return the character at the given position in this object.
Replaceable API.
Params:
offset – offset into the contents, from 0 to
length() - 1
@stable
ICU 2.0/**
     * Return the character at the given position in this object.
     * <code>Replaceable</code> API.
     * @param offset offset into the contents, from 0 to
     * <code>length()</code> - 1
     * @stable ICU 2.0
     */
    public char charAt(int offset) {
        return buf.charAt(offset);
    }

    
Copies characters from this object into the destination
character array.  The first character to be copied is at index
srcStart; the last character to be copied is at
index srcLimit-1 (thus the total number of
characters to be copied is srcLimit-srcStart). The
characters are copied into the subarray of dst
starting at index dstStart and ending at index
dstStart + (srcLimit-srcStart) - 1.
Params:
srcStart – the beginning index to copy, inclusive; 0 <= start <= limit.
srcLimit – the ending index to copy, exclusive; start <= limit <= length().
dst – the destination array.
dstStart – the start offset in the destination array.
@stable
ICU 2.0/**
     * Copies characters from this object into the destination
     * character array.  The first character to be copied is at index
     * <code>srcStart</code>; the last character to be copied is at
     * index <code>srcLimit-1</code> (thus the total number of
     * characters to be copied is <code>srcLimit-srcStart</code>). The
     * characters are copied into the subarray of <code>dst</code>
     * starting at index <code>dstStart</code> and ending at index
     * <code>dstStart + (srcLimit-srcStart) - 1</code>.
     *
     * @param srcStart the beginning index to copy, inclusive;
     *        {@code 0 <= start <= limit}.
     * @param srcLimit the ending index to copy, exclusive;
     *        {@code start <= limit <= length()}.
     * @param dst the destination array.
     * @param dstStart the start offset in the destination array.
     * @stable ICU 2.0
     */
    public void getChars(int srcStart, int srcLimit, char dst[], int dstStart) {
        if (srcStart != srcLimit) {
            buf.getChars(srcStart, srcLimit, dst, dstStart);
        }
    }
}