src/org/netbeans/modules/git/ui/log/FileEnvironment.java

   1 /*
   2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
   3  *
   4  * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
   5  *
   6  * The contents of this file are subject to the terms of either the GNU
   7  * General Public License Version 2 only ("GPL") or the Common
   8  * Development and Distribution License("CDDL") (collectively, the
   9  * "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  * Portions Copyright 2008 Alexander Coles (Ikonoklastik Productions).
  30  *
  31  * If you wish your version of this file to be governed by only the CDDL
  32  * or only the GPL Version 2, indicate your decision by adding
  33  * "[Contributor] elects to include this software in this distribution
  34  * under the [CDDL or GPL Version 2] license." If you do not indicate a
  35  * single choice of license, a recipient has the option to distribute
  36  * your version of this file under either the CDDL, the GPL Version 2 or
  37  * to extend the choice of license to its licensees as provided above.
  38  * However, if you add GPL Version 2 code and therefore, elected the GPL
  39  * Version 2 license, then the option applies only if the new code is
  40  * made subject to such option by the copyright holder.
  41  */
  42 package org.netbeans.modules.git.ui.log;
  43
  44 import java.io.File;
  45 import java.io.FileInputStream;
  46 import java.io.IOException;
  47 import java.io.InputStream;
  48 import java.util.Date;
  49 import org.netbeans.modules.git.VersionsCache;
  50 import org.openide.ErrorManager;
  51 import org.openide.text.CloneableEditorSupport;
  52
  53
  54 /**
  55  * Defines numb read-only File environment.
  56  *
  57  * @author Maros Sandor
  58  */
  59 public abstract class FileEnvironment implements CloneableEditorSupport.Env {
  60
  61     /** Serial Version UID */
  62     private static final long serialVersionUID = 1L;
  63
  64     private String mime = "text/plain";  // NOI18N
  65
  66     private final File peer;
  67
  68     private final String revision;
  69
  70     private transient Date modified;
  71
  72     /** Creates new StreamEnvironment */
  73     public FileEnvironment(File baseFile, String revision, String mime) {
  74         if (baseFile == null) throw new NullPointerException();
  75         peer = baseFile;
  76         modified = new Date();
  77         this.revision = revision;
  78         if (mime != null) {
  79             this.mime = mime;
  80         }
  81     }
  82
  83     public void markModified() throws java.io.IOException {
  84         throw new IOException("r/o"); // NOI18N
  85     }
  86
  87     public void unmarkModified() {
  88     }
  89
  90     public void removePropertyChangeListener(java.beans.PropertyChangeListener propertyChangeListener) {
  91     }
  92
  93     public boolean isModified() {
  94         return false;
  95     }
  96
  97     public java.util.Date getTime() {
  98         return modified;
  99     }
 100
 101     public void removeVetoableChangeListener(java.beans.VetoableChangeListener vetoableChangeListener) {
 102     }
 103
 104     public boolean isValid() {
 105         return true;
 106     }
 107
 108     public java.io.OutputStream outputStream() throws java.io.IOException {
 109         throw new IOException("r/o"); // NOI18N
 110     }
 111
 112     public java.lang.String getMimeType() {
 113         return mime;
 114     }
 115
 116     /**
 117      * Always return fresh stream.
 118      */
 119     public java.io.InputStream inputStream() throws java.io.IOException {
 120         return new LazyInputStream();
 121     }
 122
 123     private class LazyInputStream extends InputStream {
 124
 125         private InputStream in;
 126
 127         public LazyInputStream() {
 128         }
 129
 130         private InputStream peer() throws IOException {
 131             try {
 132                 if (in == null) {
 133                     File remoteFile = VersionsCache.getInstance().getFileRevision(peer, revision);
 134                     in = new FileInputStream(remoteFile);
 135                 }
 136                 return in;
 137             } catch (IOException ex) {
 138                 ErrorManager err = ErrorManager.getDefault();
 139                 IOException ioex = new IOException();
 140                 err.annotate(ioex, ex);
 141                 err.annotate(ioex, ErrorManager.USER, null, null, null, null);
 142                 throw ioex;
 143             }
 144         }
 145
 146         @Override
 147         public int available() throws IOException {
 148             return peer().available();
 149         }
 150
 151         @Override
 152         public void close() throws IOException {
 153             peer().close();
 154         }
 155
 156         @Override
 157         public void mark(int readlimit) {
 158         }
 159
 160         @Override
 161         public boolean markSupported() {
 162             return false;
 163         }
 164
 165         public int read() throws IOException {
 166             return peer().read();
 167         }
 168
 169         @Override
 170         public int read(byte b[]) throws IOException {
 171             return peer().read(b);
 172         }
 173
 174         @Override
 175         public int read(byte b[], int off, int len) throws IOException {
 176             return peer().read(b, off, len);
 177         }
 178
 179         @Override
 180         public void reset() throws IOException {
 181             peer().reset();
 182         }
 183
 184         @Override
 185         public long skip(long n) throws IOException {
 186             return peer().skip(n);
 187         }
 188
 189     }
 190
 191     public void addVetoableChangeListener(java.beans.VetoableChangeListener vetoableChangeListener) {
 192     }
 193
 194     public void addPropertyChangeListener(java.beans.PropertyChangeListener propertyChangeListener) {
 195     }
 196
 197 }