001: /*
002: * The Apache Software License, Version 1.1
003: *
004: * Copyright (c) 2000, 2001, 2002, 2003 Jesse Stockall. All rights reserved.
005: *
006: * Redistribution and use in source and binary forms, with or without
007: * modification, are permitted provided that the following conditions
008: * are met:
009: *
010: * 1. Redistributions of source code must retain the above copyright
011: * notice, this list of conditions and the following disclaimer.
012: *
013: * 2. Redistributions in binary form must reproduce the above copyright
014: * notice, this list of conditions and the following disclaimer in
015: * the documentation and/or other materials provided with the
016: * distribution.
017: *
018: * 3. The end-user documentation included with the redistribution, if
019: * any, must include the following acknowlegement:
020: * "This product includes software developed by the
021: * Apache Software Foundation (http://www.apache.org/)."
022: * Alternately, this acknowlegement may appear in the software itself,
023: * if and wherever such third-party acknowlegements normally appear.
024: *
025: * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
026: * Foundation" must not be used to endorse or promote products derived
027: * from this software without prior written permission. For written
028: * permission, please contact apache@apache.org.
029: *
030: * 5. Products derived from this software may not be called "Apache"
031: * nor may "Apache" appear in their names without prior written
032: * permission of the Apache Group.
033: *
034: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
035: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
036: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
037: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
038: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
039: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
040: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
041: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
042: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
043: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
044: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
045: * SUCH DAMAGE.
046: * ====================================================================
047: *
048: */
049: package org.apache.tools.ant.taskdefs.optional.genjar;
050:
051: import java.io.File;
052: import java.io.IOException;
053: import java.io.InputStream;
054: import java.util.jar.Attributes;
055: import java.util.zip.ZipEntry;
056: import java.util.zip.ZipFile;
057:
058: /**
059: * Represents a zip file in the classpath.<p>
060: *
061: * When a Zip file is located in the classpath, a ZipResolver is instantiated that encapsulates the
062: * path and performs searches in that zip. This class is used primarily to allow easy association of
063: * the <i>zip file</i> with the jar entry's attributes.<p>
064: *
065: * When a file is resolved from a JarEntrySpec, Attributes are added for the zip file and last
066: * modification time.<p>
067: *
068: *
069: *
070: * @author Original Code: <a href="mailto:jake@riggshill.com">John W. Kohler </a>
071: * @author Jesse Stockall
072: * @version $Revision: 1.4 $ $Date: 2003/02/23 10:06:10 $
073: */
074: class ZipResolver extends PathResolver {
075: private File file;
076: private ZipFile zip;
077: private String modified;
078:
079: /**
080: * Constructor for the ZipResolver object
081: *
082: * @param f Description of the Parameter
083: * @param log Description of the Parameter
084: * @throws IOException Oops!
085: */
086: ZipResolver(File f, Logger log) throws IOException {
087: super (log);
088:
089: file = f;
090: zip = new ZipFile(file);
091: modified = formatDate(file.lastModified());
092: log.verbose("Resolver: " + file);
093: }
094:
095: /**
096: * Closes the zip file to avoid locking files
097: *
098: * @throws IOException Oops!
099: */
100: public void close() throws IOException {
101: if (zip != null) {
102: zip.close();
103: }
104: }
105:
106: /**
107: * Description of the Method
108: *
109: * @param spec Description of the Parameter
110: * @return Description of the Return Value
111: * @throws IOException Oops!
112: */
113: public InputStream resolve(JarEntrySpec spec) throws IOException {
114: InputStream is = null;
115: ZipEntry ze = zip.getEntry(spec.getJarName());
116: if (ze != null) {
117: Attributes atts = spec.getAttributes();
118: atts.putValue(CONTENT_LOC, file.getAbsolutePath());
119: long modTime = ze.getTime();
120: if (modTime > 0) {
121: atts.putValue(LAST_MOD, formatDate(modTime));
122: } else {
123: atts.putValue(LAST_MOD, modified);
124: }
125: is = zip.getInputStream(ze);
126: log.debug(spec.getJarName() + "->" + file);
127: }
128: return is;
129: }
130:
131: /**
132: * Description of the Method
133: *
134: * @param fname Description of the Parameter
135: * @return Description of the Return Value
136: * @throws IOException Oops!
137: */
138: public InputStream resolve(String fname) throws IOException {
139: InputStream is = null;
140: ZipEntry ze = zip.getEntry(fname);
141: if (ze != null) {
142: is = zip.getInputStream(ze);
143: log.debug(fname + "->" + file);
144: }
145: return is;
146: }
147: }
148: // vi:set ts=4 sw=4:
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