01: /*
02: * $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 $
03: * ====================================================================
04: * The Apache Software License, Version 1.1
05: *
06: * Copyright (c) 2003 The Apache Software Foundation. All rights
07: * reserved.
08: *
09: * 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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