1 /*
2 * $Header: /home/cvs/jakarta-commons/primitives/src/java/org/apache/commons/collections/primitives/adapters/io/CharIteratorReader.java,v 1.1 2003/10/13 22:46:58 scolebourne Exp $
3 * ====================================================================
4 * The Apache Software License, Version 1.1
5 *
6 * Copyright (c) 2003 The Apache Software Foundation. All rights
7 * reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. The end-user documentation included with the redistribution, if
22 * any, must include the following acknowledgement:
23 * "This product includes software developed by the
24 * Apache Software Foundation (http://www.apache.org/)."
25 * Alternately, this acknowledgement may appear in the software itself,
26 * if and wherever such third-party acknowledgements normally appear.
27 *
28 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
29 * Foundation" must not be used to endorse or promote products derived
30 * from this software without prior written permission. For written
31 * permission, please contact apache@apache.org.
32 *
33 * 5. Products derived from this software may not be called "Apache"
34 * nor may "Apache" appear in their names without prior written
35 * permission of the Apache Software Foundation.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This software consists of voluntary contributions made by many
52 * individuals on behalf of the Apache Software Foundation. For more
53 * information on the Apache Software Foundation, please see
54 * <http://www.apache.org/>.
55 *
56 */
57
58 package org.apache.commons.collections.primitives.adapters.io;
59
60 import java.io.Reader;
61
62 import org.apache.commons.collections.primitives.CharIterator;
63
64 /**
65 * Adapts a {@link CharIterator} to the {@link Reader} interface.
66 *
67 * @version $Revision: 1.1 $ $Date: 2003/10/13 22:46:58 $
68 * @author Rodney Waldhoff
69 */
70 public class CharIteratorReader extends Reader {
71
72 public CharIteratorReader(CharIterator in) {
73 this.iterator= in;
74 }
75
76 public int read(char[] buf, int off, int len) {
77 if(iterator.hasNext()) {
78 int count = 0;
79 while(iterator.hasNext() && count < len) {
80 buf[off + count] = iterator.next();
81 count++;
82 }
83 return count;
84 } else {
85 return -1;
86 }
87 }
88
89 public void close() {
90 }
91
92 public static Reader adapt(CharIterator in) {
93 return null == in ? null : new CharIteratorReader(in);
94 }
95
96 private CharIterator iterator = null;
97
98 }
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