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

   1 /*
   2  * Copyright (C) 2007, Robin Rosenberg <robin.rosenberg@dewire.com>
   3  * Copyright (C) 2007, Shawn O. Pearce <spearce@spearce.org>
   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.ArrayList;
  44
  45 /**
  46  * Abstract TreeVisitor for visiting all files known by a Tree.
  47  */
  48 public abstract class TreeVisitorWithCurrentDirectory implements TreeVisitor {
  49         private final ArrayList stack;
  50
  51         private File currentDirectory;
  52
  53         protected TreeVisitorWithCurrentDirectory(final File rootDirectory) {
  54                 stack = new ArrayList(16);
  55                 currentDirectory = rootDirectory;
  56         }
  57
  58         protected File getCurrentDirectory() {
  59                 return currentDirectory;
  60         }
  61
  62         public void startVisitTree(final Tree t) throws IOException {
  63                 stack.add(currentDirectory);
  64                 if (!t.isRoot()) {
  65                         currentDirectory = new File(currentDirectory, t.getName());
  66                 }
  67         }
  68
  69         public void endVisitTree(final Tree t) throws IOException {
  70                 currentDirectory = (File) stack.remove(stack.size() - 1);
  71         }
  72 }