/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.sun.org.apache.regexp.internal;
/**
* Encapsulates char[] as CharacterIterator
*
* @author <a href="mailto:ales.novak@netbeans.com">Ales Novak</a>
*/
public final class CharacterArrayCharacterIterator implements CharacterIterator
{
/** encapsulated */
private final char[] src;
/** offset in the char array */
private final int off;
/** used portion of the array */
private final int len;
/** @param src - encapsulated String */
public CharacterArrayCharacterIterator(char[] src, int off, int len)
{
this.src = src;
this.off = off;
this.len = len;
}
/** @return a substring */
public String substring(int beginIndex, int endIndex)
{
if (endIndex > len) {
throw new IndexOutOfBoundsException("endIndex=" + endIndex
+ "; sequence size=" + len);
}
if (beginIndex < 0 || beginIndex > endIndex) {
throw new IndexOutOfBoundsException("beginIndex=" + beginIndex
+ "; endIndex=" + endIndex);
}
return new String(src, off + beginIndex, endIndex - beginIndex);
}
/** @return a substring */
public String substring(int beginIndex)
{
return substring(beginIndex, len);
}
/** @return a character at the specified position. */
public char charAt(int pos)
{
return src[off + pos];
}
/** @return <tt>true</tt> iff if the specified index is after the end of the character stream */
public boolean isEnd(int pos)
{
return (pos >= len);
}
}