CompositeResourceMapping


1   /*******************************************************************************
2    * Copyright (c) 2000, 2005 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials
4    * are made available under the terms of the Eclipse Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/epl-v10.html
7    *
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  package org.eclipse.ui.internal.ide.model;
12  
13  import java.util.ArrayList  ;
14  import java.util.Arrays  ;
15  import java.util.HashSet  ;
16  import java.util.List  ;
17  import java.util.Set  ;
18  import org.eclipse.core.internal.resources.mapping.ResourceMapping;
19  import org.eclipse.core.internal.resources.mapping.ResourceMappingContext;
20  import org.eclipse.core.internal.resources.mapping.ResourceTraversal;
21  import org.eclipse.core.resources.IProject;
22  import org.eclipse.core.runtime.CoreException;
23  import org.eclipse.core.runtime.IProgressMonitor;
24  import org.eclipse.core.runtime.NullProgressMonitor;
25  import org.eclipse.core.runtime.SubProgressMonitor;
26  
27  /**
28   * A resource mapping that contains child mappings which are used to obtain the traversals
29   */
30  public class CompositeResourceMapping extends ResourceMapping {
31  
32      private final Object   modelObject;
33      private final ResourceMapping[] mappings;
34      private final IProject[] projects;
35  
36      /**
37       * Create a composite mapping that obtains it's traversals from a set of sub-mappings.
38       * @param modelObject the model object for this mapping
39       * @param mappings the sub-mappings from which the traversals are obtained
40       */
41      public CompositeResourceMapping(Object   modelObject, ResourceMapping[] mappings) {
42          this.modelObject = modelObject;
43          this.mappings = mappings;
44          this.projects = getProjects(mappings);
45      }
46  
47      /*
48       * Return an array of all the projects of the given mappings.
49       */
50      private IProject[] getProjects(ResourceMapping[] mappings) {
51          Set   result = new HashSet  ();
52          for (int i = 0; i < mappings.length; i++) {
53              ResourceMapping mapping = mappings[i];
54              result.addAll(Arrays.asList(mapping.getProjects()));
55          }
56          return (IProject[]) result.toArray(new IProject[result.size()]);
57      }
58  
59      /* (non-Javadoc)
60       * @see org.eclipse.core.internal.resources.mapping.ResourceMapping#getModelObject()
61       */
62      public Object   getModelObject() {
63          return modelObject;
64      }
65  
66      /* (non-Javadoc)
67       * @see org.eclipse.core.internal.resources.mapping.ResourceMapping#getProjects()
68       */
69      public IProject[] getProjects() {
70          return projects;
71      }
72      
73      /* (non-Javadoc)
74       * @see org.eclipse.core.internal.resources.mapping.ResourceMapping#getTraversals(org.eclipse.core.internal.resources.mapping.ResourceMappingContext, org.eclipse.core.runtime.IProgressMonitor)
75       */
76      public ResourceTraversal[] getTraversals(ResourceMappingContext context,
77              IProgressMonitor monitor) throws CoreException {
78          if (monitor == null)
79              monitor = new NullProgressMonitor();
80          try {
81              monitor.beginTask(null, 100 * mappings.length);
82              List   result = new ArrayList  ();
83              for (int i = 0; i < mappings.length; i++) {
84                  ResourceMapping mapping = mappings[i];
85                  result.addAll(Arrays.asList(mapping.getTraversals(context, new SubProgressMonitor(monitor, 100))));
86              }
87              return (ResourceTraversal[]) result.toArray(new ResourceTraversal[result.size()]);
88          } finally {
89              monitor.done();
90          }
91      }
92  
93  }
94
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