AccessRuleParticipant


1   /*******************************************************************************
2    * Copyright (c) 2006 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.launching.environments;
12  
13  import org.eclipse.core.runtime.CoreException;
14  import org.eclipse.core.runtime.IConfigurationElement;
15  import org.eclipse.jdt.core.IAccessRule;
16  import org.eclipse.jdt.core.IJavaProject;
17  import org.eclipse.jdt.internal.launching.LaunchingPlugin;
18  import org.eclipse.jdt.launching.IVMInstall;
19  import org.eclipse.jdt.launching.LibraryLocation;
20  import org.eclipse.jdt.launching.environments.IAccessRuleParticipant;
21  import org.eclipse.jdt.launching.environments.IExecutionEnvironment;
22  
23  /**
24   * Proxy to an access rule participant for an execution environment.
25   * 
26   * @since 3.3
27   */
28  class AccessRuleParticipant implements IAccessRuleParticipant {
29  
30      private IConfigurationElement fElement;
31      
32      private IAccessRuleParticipant fDelegate;
33      
34      /**
35       * Constructs a proxy to a rule participant contributed with the 
36       * given configuration element. The element may be an
37       * <code>executionEnvironment</code> element or a <code>ruleParticipant</code>
38       * extension.
39       * 
40       * @param element
41       */
42      AccessRuleParticipant(IConfigurationElement element) {
43          fElement = element;
44      }
45      
46      /* (non-Javadoc)
47       * @see org.eclipse.jdt.launching.environments.IAccessRuleParticipant#getAccessRules(org.eclipse.jdt.launching.environments.IExecutionEnvironment, org.eclipse.jdt.launching.IVMInstall, org.eclipse.jdt.launching.LibraryLocation[], org.eclipse.jdt.core.IJavaProject)
48       */
49      public IAccessRule[][] getAccessRules(IExecutionEnvironment environment, IVMInstall vm, LibraryLocation[] libraries, IJavaProject project) {
50          try {
51              return getDelegate().getAccessRules(environment, vm, libraries, project);
52          } catch (CoreException e) {
53              LaunchingPlugin.log(e.getStatus());
54          }
55          IAccessRule[][] rules = new IAccessRule[libraries.length][];
56          for (int i = 0; i < rules.length; i++) {
57              rules[i] = new IAccessRule[0];
58          }
59          return rules;
60      }
61      
62      private IAccessRuleParticipant getDelegate() throws CoreException {
63          if (fDelegate == null) {
64              if (fElement.getName().equals(EnvironmentsManager.ENVIRONMENT_ELEMENT)) {
65                  fDelegate = (IAccessRuleParticipant) fElement.createExecutableExtension(EnvironmentsManager.RULE_PARTICIPANT_ELEMENT);
66              } else {
67                  fDelegate = (IAccessRuleParticipant) fElement.createExecutableExtension("class"); //$NON-NLS-1$
68              }
69          }
70          return fDelegate;
71      }
72      
73      /**
74       * Returns the id of this participant.
75       * 
76       * @return participant id
77       */
78      String   getId() {
79          if (fElement.getName().equals(EnvironmentsManager.ENVIRONMENT_ELEMENT)) {
80              return fElement.getAttribute(EnvironmentsManager.RULE_PARTICIPANT_ELEMENT);
81          } else {
82              return fElement.getAttribute("id"); //$NON-NLS-1$
83          }
84      }
85  
86  }
87
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