org.eclipse.egit.core/src/org/eclipse/egit/core/internal/merge/GitCachedResourceVariantTree.java

   1 /*******************************************************************************
   2  * Copyright (C) 2015, Obeo.
   3  *
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *******************************************************************************/
   9 package org.eclipse.egit.core.internal.merge;
  10
  11 import java.util.Set;
  12
  13 import org.eclipse.core.resources.IResource;
  14 import org.eclipse.core.runtime.IProgressMonitor;
  15 import org.eclipse.team.core.TeamException;
  16 import org.eclipse.team.core.variants.IResourceVariant;
  17 import org.eclipse.team.core.variants.IResourceVariantTree;
  18
  19 /**
  20  * An immutable resource variant tree backed by a
  21  * {@link GitResourceVariantCache}. This will never contact the server.
  22  * <p>
  23  * This will not react to refreshing calls and shouldn't be used for
  24  * synchronization purposes.
  25  * </p>
  26  */
  27 /*
  28  * Illegal implementation of IResourceVariantTree : we could also extend the
  29  * AbstractResourceVariantTree... but since we don't react to refreshing calls
  30  * anyway, we do not need the extra logic it provides.
  31  */
  32 class GitCachedResourceVariantTree implements IResourceVariantTree {
  33         private final GitResourceVariantCache cache;
  34
  35         public GitCachedResourceVariantTree(GitResourceVariantCache cache) {
  36                 this.cache = cache;
  37         }
  38
  39         @Override
  40         public IResource[] roots() {
  41                 final Set<IResource> roots = cache.getRoots();
  42                 return roots.toArray(new IResource[roots.size()]);
  43         }
  44
  45         @Override
  46         public IResource[] members(IResource resource) throws TeamException {
  47                 return cache.members(resource);
  48         }
  49
  50         @Override
  51         public IResourceVariant getResourceVariant(IResource resource)
  52                         throws TeamException {
  53                 return cache.getVariant(resource);
  54         }
  55
  56         @Override
  57         public boolean hasResourceVariant(IResource resource) throws TeamException {
  58                 return cache.getVariant(resource) != null;
  59         }
  60
  61         @Override
  62         public IResource[] refresh(IResource[] resources, int depth,
  63                         IProgressMonitor monitor) throws TeamException {
  64                 // This does not react to refresh calls
  65                 return new IResource[0];
  66         }
  67
  68         @Override
  69         public void flushVariants(IResource resource, int depth)
  70                         throws TeamException {
  71                 // Empty implementation
  72         }
  73 }