Source Code Cross Referenced for LocalZipResource.java in  » J2EE » Enhydra-Application-Framework » com » lutris » classloader » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » Enhydra Application Framework » com.lutris.classloader 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Enhydra Java Application Server Project
003:         *
004:         * The contents of this file are subject to the Enhydra Public License
005:         * Version 1.1 (the "License"); you may not use this file except in
006:         * compliance with the License. You may obtain a copy of the License on
007:         * the Enhydra web site ( http://www.enhydra.org/ ).
008:         *
009:         * Software distributed under the License is distributed on an "AS IS"
010:         * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
011:         * the License for the specific terms governing rights and limitations
012:         * under the License.
013:         *
014:         * The Initial Developer of the Enhydra Application Server is Lutris
015:         * Technologies, Inc. The Enhydra Application Server and portions created
016:         * by Lutris Technologies, Inc. are Copyright Lutris Technologies, Inc.
017:         * All Rights Reserved.
018:         *
019:         * Contributor(s):
020:         *
021:         * $Id: LocalZipResource.java,v 1.2 2006-06-15 14:07:00 sinisa Exp $
022:         */
023:
024:        package com.lutris.classloader;
025:
026:        // lutris packages
027:        // v. strahinja, 24 sep 2002
028:        import java.io.FileNotFoundException;
029:        import java.io.IOException;
030:        import java.io.InputStream;
031:        import java.util.zip.ZipEntry;
032:        import java.util.zip.ZipFile;
033:
034:        import com.lutris.logging.LogChannel;
035:        import com.lutris.util.FatalExceptionError;
036:
037:        /**
038:         * <P>A <CODE>Resource</CODE> that is an entry in
039:         * a specified zip file on the local machine.  The zip file is represented by a
040:         * <CODE>ClassPathEntry</CODE>, and the filename is specified by a String.
041:         *
042:         * @author Kristen Pol, Lutris Technologies
043:         * @version $Revision : 1.1 $
044:         * @see com.lutris.classloader.ClassPathEntry
045:         * @see com.lutris.classloader.Resource
046:         * @see java.util.zip.ZipFile
047:         * @see java.util.zip.ZipEntry
048:         */
049:        public class LocalZipResource extends Resource {
050:
051:            // private data members
052:
053:            /** The ZipEntry that represents this resource. */
054:            private ZipEntry zipEntry = null;
055:
056:            // constructors
057:
058:            /**
059:             * Constructs local zip file resource with specified name and location.
060:             *
061:             * @param name The file name of the resource.
062:             * @param location The location of the resource.
063:             * @param loadLogChannel The log channel for logging.
064:             * @exception FileNotFoundException if the desired file does not exist or
065:             *         does not have read permission.
066:             * @see Resource
067:             * @see ClassPathEntry
068:             */
069:            protected LocalZipResource(String name, ClassPathEntry location,
070:            // v. strahinja, 24 sep 2002
071:                    LogChannel loadLogChannel)
072:            //        Logger loadLogger)
073:                    throws FileNotFoundException {
074:                // v. strahinja, 24 sep 2002
075:                super (name, location, loadLogChannel);
076:                //    super(name, location, loadLogger);
077:                ZipFile zipFile = location.getZipFile();
078:                if (zipFile == null) {
079:                    throw new FileNotFoundException(
080:                            "There is no zip file associated with resource: "
081:                                    + location);
082:                }
083:                try {
084:                    zipEntry = zipFile.getEntry(name);
085:                    if (zipEntry == null) {
086:                        throw new FileNotFoundException("Entry, " + name
087:                                + ", does not exist in zip " + "file, "
088:                                + zipFile);
089:                    }
090:                    size = zipEntry.getSize();
091:                    //lastModifiedTime = zipEntry.getTime();
092:                } catch (IOException e) {
093:                    throw new FileNotFoundException("Entry, " + name
094:                            + ", does not exist in zip file, " + zipFile
095:                            + ", or is " + "corrupt: " + e.getMessage());
096:                }
097:            }
098:
099:            // public methods
100:
101:            /**
102:             * Gets input stream representing resource.
103:             *
104:             * @return the input stream that represents the resource.
105:             * @exception IOException if the input stream can not be constructed.
106:             * @see InputStream
107:             */
108:            public InputStream getInputStream() throws IOException {
109:                ZipFile zipFile = location.getZipFile();
110:                if (zipFile == null) {
111:                    throw new FatalExceptionError(
112:                            new IOException(
113:                                    "Failed to get zip file for location, should not be able to get here without a zip file"));
114:                }
115:                return zipFile.getInputStream(zipEntry);
116:            }
117:
118:            /**
119:             * Get current last-modification time of resource.  This is the
120:             * time on the disk file the resource is associated with.
121:             *
122:             * @return the last-modified time of the permanent copy of the resource
123:             * in milliseconds.
124:             */
125:            public long getCurrentLastModifiedTime()
126:                    throws FileNotFoundException {
127:                lastModifiedTime = zipEntry.getTime();
128:                return lastModifiedTime;
129:                //return zipEntry.getTime();
130:            }
131:        }
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