LogicalObjectStructureClassType


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.jdt.internal.debug.core.logicalstructures;
12  
13  import org.eclipse.debug.core.DebugException;
14  import org.eclipse.debug.core.model.ILogicalStructureTypeDelegate;
15  import org.eclipse.debug.core.model.IValue;
16  import org.eclipse.jdt.debug.core.IJavaClassType;
17  import org.eclipse.jdt.debug.core.IJavaObject;
18  import org.eclipse.jdt.debug.core.IJavaType;
19  
20  /**
21   * Common facilities for logical structure types for instances/subtypes of a class
22   */
23  public abstract class LogicalObjectStructureClassType extends LogicalObjectStructureInterfaceType implements ILogicalStructureTypeDelegate {
24      
25      /* (non-Javadoc)
26       * @see org.eclipse.debug.core.model.ILogicalStructureType#providesLogicalStructure(org.eclipse.debug.core.model.IValue)
27       */
28      public boolean providesLogicalStructure(IValue value) {
29          if (value instanceof IJavaObject) {
30              IJavaObject object = (IJavaObject) value;
31              try {
32                  IJavaType type = object.getJavaType();
33                  if (type instanceof IJavaClassType) {
34                      IJavaClassType classType = (IJavaClassType) type;
35                      String   targetClass = getTargetClassName();                  
36                      while (classType != null) {
37                          if (classType.getName().equals(targetClass)) {
38                              return true;
39                          }
40                          classType = classType.getSuperclass();
41                      }
42                  }
43              } catch (DebugException e) {
44              }
45          }
46          return false;
47      }
48      
49      /**
50       * Returns the name of a class that an object must be an instance or subtype of
51       * for this structure type to be appropriate.
52       * 
53       * @return the name of a class that an object must be an instance or subtype of
54       * for this structure type to be appropriate
55       */
56      protected abstract String   getTargetClassName();
57      
58      /* (non-Javadoc)
59       * @see org.eclipse.jdt.internal.debug.core.logicalstructures.LogicalObjectStructureInterfaceType#getTargetInterfaceName()
60       */
61      protected String   getTargetInterfaceName() {
62          // not used
63          return null;
64      }
65  
66  }
67
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