org.spearce.jgit/src/org/spearce/jgit/lib/IndexDiff.java

   1 /*
   2  * Copyright (C) 2007, Dave Watson <dwatson@mimvista.com>
   3  * Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.com>
   4  *
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or
   8  * without modification, are permitted provided that the following
   9  * conditions are met:
  10  *
  11  * - Redistributions of source code must retain the above copyright
  12  *   notice, this list of conditions and the following disclaimer.
  13  *
  14  * - Redistributions in binary form must reproduce the above
  15  *   copyright notice, this list of conditions and the following
  16  *   disclaimer in the documentation and/or other materials provided
  17  *   with the distribution.
  18  *
  19  * - Neither the name of the Git Development Community nor the
  20  *   names of its contributors may be used to endorse or promote
  21  *   products derived from this software without specific prior
  22  *   written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  25  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  26  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  27  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  29  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  31  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  32  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  33  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  34  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  36  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 package org.spearce.jgit.lib;
  40
  41 import java.io.File;
  42 import java.io.IOException;
  43 import java.util.HashSet;
  44
  45 import org.spearce.jgit.lib.GitIndex.Entry;
  46
  47 /**
  48  * Compares the Index, a Tree, and the working directory
  49  */
  50 public class IndexDiff {
  51         private GitIndex index;
  52         private Tree tree;
  53
  54         /**
  55          * Construct an indexdiff for diffing the workdir against
  56          * the index.
  57          *
  58          * @param repository
  59          * @throws IOException
  60          */
  61         public IndexDiff(Repository repository) throws IOException {
  62                 this.tree = repository.mapTree("HEAD");
  63                 this.index = repository.getIndex();
  64         }
  65
  66         /**
  67          * Construct an indexdiff for diffing the workdir against both
  68          * the index and a tree.
  69          *
  70          * @param tree
  71          * @param index
  72          */
  73         public IndexDiff(Tree tree, GitIndex index) {
  74                 this.tree = tree;
  75                 this.index = index;
  76         }
  77
  78         boolean anyChanges = false;
  79
  80         /**
  81          * Run the diff operation. Until this is called, all lists will be empty
  82          * @return if anything is different between index, tree, and workdir
  83          * @throws IOException
  84          */
  85         public boolean diff() throws IOException {
  86                 final File root = index.getRepository().getWorkDir();
  87                 new IndexTreeWalker(index, tree, root, new AbstractIndexTreeVisitor() {
  88                         public void visitEntry(TreeEntry treeEntry, Entry indexEntry, File file) {
  89                                 if (treeEntry == null) {
  90                                         added.add(indexEntry.getName());
  91                                         anyChanges = true;
  92                                 } else if (indexEntry == null) {
  93                                         if (!(treeEntry instanceof Tree))
  94                                                 removed.add(treeEntry.getFullName());
  95                                         anyChanges = true;
  96                                 } else {
  97                                         if (!treeEntry.getId().equals(indexEntry.getObjectId())) {
  98                                                 changed.add(indexEntry.getName());
  99                                                 anyChanges = true;
 100                                         }
 101                                 }
 102
 103                                 if (indexEntry != null) {
 104                                         if (!file.exists()) {
 105                                                 missing.add(indexEntry.getName());
 106                                                 anyChanges = true;
 107                                         } else {
 108                                                 if (indexEntry.isModified(root, true)) {
 109                                                         modified.add(indexEntry.getName());
 110                                                         anyChanges = true;
 111                                                 }
 112                                         }
 113                                 }
 114                         }
 115                 }).walk();
 116
 117                 return anyChanges;
 118         }
 119
 120         HashSet<String> added = new HashSet<String>();
 121         HashSet<String> changed = new HashSet<String>();
 122         HashSet<String> removed = new HashSet<String>();
 123         HashSet<String> missing = new HashSet<String>();
 124         HashSet<String> modified = new HashSet<String>();
 125
 126         /**
 127          * @return list of files added to the index, not in the tree
 128          */
 129         public HashSet<String> getAdded() {
 130                 return added;
 131         }
 132
 133         /**
 134          * @return list of files changed from tree to index
 135          */
 136         public HashSet<String> getChanged() {
 137                 return changed;
 138         }
 139
 140         /**
 141          * @return list of files removed from index, but in tree
 142          */
 143         public HashSet<String> getRemoved() {
 144                 return removed;
 145         }
 146
 147         /**
 148          * @return list of files in index, but not filesystem
 149          */
 150         public HashSet<String> getMissing() {
 151                 return missing;
 152         }
 153
 154         /**
 155          * @return list of files on modified on disk relative to the index
 156          */
 157         public HashSet<String> getModified() {
 158                 return modified;
 159         }
 160 }