01: /*
02: * @(#)DirectoryChannelLogReader.java
03: *
04: * Copyright (C) 2002-2003 Matt Albrecht
05: * groboclown@users.sourceforge.net
06: * http://groboutils.sourceforge.net
07: *
08: * Permission is hereby granted, free of charge, to any person obtaining a
09: * copy of this software and associated documentation files (the "Software"),
10: * to deal in the Software without restriction, including without limitation
11: * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12: * and/or sell copies of the Software, and to permit persons to whom the
13: * Software is furnished to do so, subject to the following conditions:
14: *
15: * The above copyright notice and this permission notice shall be included in
16: * all copies or substantial portions of the Software.
17: *
18: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19: * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20: * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21: * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22: * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23: * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24: * DEALINGS IN THE SOFTWARE.
25: */
26:
27: package net.sourceforge.groboutils.codecoverage.v2.logger;
28:
29: import java.io.File;
30: import java.io.IOException;
31:
32: import net.sourceforge.groboutils.codecoverage.v2.IChannelLogReader;
33: import net.sourceforge.groboutils.codecoverage.v2.IClassChannelLogReader;
34:
35: /**
36: * Reads logs written by DirectoryChannelLogger.
37: *
38: * @author Matt Albrecht <a href="mailto:groboclown@users.sourceforge.net">groboclown@users.sourceforge.net</a>
39: * @version $Date: 2004/04/15 05:48:26 $
40: * @since December 17, 2002
41: */
42: public class DirectoryChannelLogReader implements IChannelLogReader {
43: private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger
44: .getLogger(DirectoryChannelLogReader.class);
45: private static final String EXTENTION = DirectoryChannelLogger.CLASS_LOG_EXTENTION;
46:
47: private File channelDir;
48:
49: public DirectoryChannelLogReader(File baseDir, short channel) {
50: File newDir = new File(baseDir, Short.toString(channel));
51: if (!newDir.exists() || !newDir.isDirectory()) {
52: throw new IllegalArgumentException("File " + newDir
53: + " is not a directory or doesn't exist.");
54: }
55: this .channelDir = newDir;
56: }
57:
58: /**
59: * Returns a channel reader for a specific class signature.
60: *
61: * @return the reader for the given class signature. If there are no
62: * logs for the given class, then the reader will not return anything.
63: * @exception IOException thrown if there was an underlying problem reading
64: * from the log.
65: */
66: public IClassChannelLogReader getReaderForClassSignature(
67: String signature) throws IOException {
68: File logFile = new File(this .channelDir, signature + EXTENTION);
69: if (!logFile.exists()) {
70: // this isn't a critical error: it means that nothing in this class
71: // was ever executed.
72: LOG.info("Couldn't finding a log file for class "
73: + signature + " in file " + logFile + ".");
74: return new EmptyClassChannelLogReader();
75: }
76:
77: LOG
78: .debug("Loading class log reader from file " + logFile
79: + ".");
80: return new DirectoryClassChannelLogReader(logFile, signature);
81: }
82: }
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