01: /*
02: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
03: *
04: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
05: *
06: * The contents of this file are subject to the terms of either the GNU
07: * General Public License Version 2 only ("GPL") or the Common
08: * Development and Distribution License("CDDL") (collectively, the
09: * "License"). You may not use this file except in compliance with the
10: * License. You can obtain a copy of the License at
11: * http://www.netbeans.org/cddl-gplv2.html
12: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
13: * specific language governing permissions and limitations under the
14: * License. When distributing the software, include this License Header
15: * Notice in each file and include the License file at
16: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
17: * particular file as subject to the "Classpath" exception as provided
18: * by Sun in the GPL Version 2 section of the License file that
19: * accompanied this code. If applicable, add the following below the
20: * License Header, with the fields enclosed by brackets [] replaced by
21: * your own identifying information:
22: * "Portions Copyrighted [year] [name of copyright owner]"
23: *
24: * Contributor(s):
25: *
26: * The Original Software is NetBeans. The Initial Developer of the Original
27: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
28: * Microsystems, Inc. All Rights Reserved.
29: *
30: * If you wish your version of this file to be governed by only the CDDL
31: * or only the GPL Version 2, indicate your decision by adding
32: * "[Contributor] elects to include this software in this distribution
33: * under the [CDDL or GPL Version 2] license." If you do not indicate a
34: * single choice of license, a recipient has the option to distribute
35: * your version of this file under either the CDDL, the GPL Version 2 or
36: * to extend the choice of license to its licensees as provided above.
37: * However, if you add GPL Version 2 code and therefore, elected the GPL
38: * Version 2 license, then the option applies only if the new code is
39: * made subject to such option by the copyright holder.
40: */
41: package org.netbeans.tax.io;
42:
43: import java.io.*;
44:
45: import org.netbeans.tax.TreeDocumentRoot;
46: import org.netbeans.tax.TreeException;
47: import org.netbeans.tax.io.TreeStreamResult;
48: import org.netbeans.tax.io.TreeWriter;
49:
50: /**
51: * Access tree content using reader. The tree MUST NOT change until the
52: * reader is closed. It is responsibility of caller.
53: *
54: * @author Petr Kuzel
55: * @version 0.9
56: */
57: public class TreeReader extends Reader {
58:
59: private final StringReader reader;
60:
61: /**
62: * Creates new TreeReader that is immediatelly ready for reading.
63: */
64: public TreeReader(TreeDocumentRoot doc) throws IOException {
65:
66: reader = new StringReader(Convertors.treeToString(doc));
67:
68: }
69:
70: public void close() throws IOException {
71: if (reader == null)
72: throw new IOException(Util.THIS
73: .getString("EXC_null_reader"));
74: reader.close();
75: }
76:
77: public int read(char[] cbuf, int off, int len) throws IOException {
78: if (reader == null)
79: throw new IOException(Util.THIS
80: .getString("EXC_null_reader"));
81: return reader.read(cbuf, off, len);
82: }
83: }
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