Source Code Cross Referenced for TeeReader.java in  » Scripting » jacl » org » codehaus » janino » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » jacl » org.codehaus.janino.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         * Janino - An embedded Java[TM] compiler
03:         *
04:         * Copyright (c) 2006, Arno Unkrig
05:         * All rights reserved.
06:         *
07:         * Redistribution and use in source and binary forms, with or without
08:         * modification, are permitted provided that the following conditions
09:         * are met:
10:         *
11:         *    1. Redistributions of source code must retain the above copyright
12:         *       notice, this list of conditions and the following disclaimer.
13:         *    2. Redistributions in binary form must reproduce the above
14:         *       copyright notice, this list of conditions and the following
15:         *       disclaimer in the documentation and/or other materials
16:         *       provided with the distribution.
17:         *    3. The name of the author may not be used to endorse or promote
18:         *       products derived from this software without specific prior
19:         *       written permission.
20:         *
21:         * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22:         * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23:         * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24:         * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
25:         * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26:         * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27:         * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28:         * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
29:         * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30:         * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
31:         * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32:         */
33:
34:        package org.codehaus.janino.util;
35:
36:        import java.io.*;
37:
38:        /**
39:         * A {@link java.io.FilterReader} that copies the bytes being passed through
40:         * to a given {@link java.io.Writer}. This is in analogy with the UNIX "tee" command.
41:         */
42:        public class TeeReader extends FilterReader {
43:            private final Writer out;
44:            private final boolean closeWriterOnEOF;
45:
46:            public TeeReader(Reader in, Writer out, boolean closeWriterOnEOF) {
47:                super (in);
48:                this .out = out;
49:                this .closeWriterOnEOF = closeWriterOnEOF;
50:            }
51:
52:            public void close() throws IOException {
53:                this .in.close();
54:                this .out.close();
55:            }
56:
57:            public int read() throws IOException {
58:                int c = this .in.read();
59:                if (c == -1) {
60:                    if (this .closeWriterOnEOF) {
61:                        this .out.close();
62:                    } else {
63:                        this .out.flush();
64:                    }
65:                } else {
66:                    this .out.write(c);
67:                }
68:                return c;
69:            }
70:
71:            public int read(char[] cbuf, int off, int len) throws IOException {
72:                int bytesRead = this .in.read(cbuf, off, len);
73:                if (bytesRead == -1) {
74:                    if (this.closeWriterOnEOF) {
75:                        this.out.close();
76:                    } else {
77:                        this.out.flush();
78:                    }
79:                } else {
80:                    this.out.write(cbuf, off, bytesRead);
81:                }
82:                return bytesRead;
83:            }
84:        }
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