01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: package org.apache.regexp;
19:
20: /**
21: * Encapsulates char[] as CharacterIterator
22: *
23: * @author <a href="mailto:ales.novak@netbeans.com">Ales Novak</a>
24: * @version CVS $Id: CharacterArrayCharacterIterator.java 518156 2007-03-14 14:31:26Z vgritsenko $
25: */
26: public final class CharacterArrayCharacterIterator implements
27: CharacterIterator {
28: /** encapsulated */
29: private final char[] src;
30: /** offset in the char array */
31: private final int off;
32: /** used portion of the array */
33: private final int len;
34:
35: /** @param src - encapsulated String */
36: public CharacterArrayCharacterIterator(char[] src, int off, int len) {
37: this .src = src;
38: this .off = off;
39: this .len = len;
40: }
41:
42: /** @return a substring */
43: public String substring(int beginIndex, int endIndex) {
44: if (endIndex > len) {
45: throw new IndexOutOfBoundsException("endIndex=" + endIndex
46: + "; sequence size=" + len);
47: }
48: if (beginIndex < 0 || beginIndex > endIndex) {
49: throw new IndexOutOfBoundsException("beginIndex="
50: + beginIndex + "; endIndex=" + endIndex);
51: }
52: return new String(src, off + beginIndex, endIndex - beginIndex);
53: }
54:
55: /** @return a substring */
56: public String substring(int beginIndex) {
57: return substring(beginIndex, len);
58: }
59:
60: /** @return a character at the specified position. */
61: public char charAt(int pos) {
62: return src[off + pos];
63: }
64:
65: /** @return <tt>true</tt> iff if the specified index is after the end of the character stream */
66: public boolean isEnd(int pos) {
67: return (pos >= len);
68: }
69: }
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