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1 | /******************************************************************************* |
2 | * Copyright (c) 2000, 2008 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.ui; | |
12 | ||
13 | import org.eclipse.core.runtime.IAdaptable; | |
14 | ||
15 | import org.eclipse.core.resources.IResource; | |
16 | import org.eclipse.core.resources.ResourcesPlugin; | |
17 | ||
18 | import org.eclipse.ui.IContainmentAdapter; | |
19 | ||
20 | import org.eclipse.jdt.core.IJavaElement; | |
21 | import org.eclipse.jdt.core.IJavaModel; | |
22 | import org.eclipse.jdt.core.JavaCore; | |
23 | ||
24 | public class JavaElementContainmentAdapter implements IContainmentAdapter { | |
25 | ||
26 | private IJavaModel fJavaModel= JavaCore.create(ResourcesPlugin.getWorkspace().getRoot()); | |
27 | ||
28 | public boolean contains(Object workingSetElement, Object element, int flags) { | |
29 | if (!(workingSetElement instanceof IJavaElement) || element == null) | |
30 | return false; | |
31 | ||
32 | IJavaElement workingSetJavaElement= (IJavaElement)workingSetElement; | |
33 | IResource resource= null; | |
34 | IJavaElement jElement= null; | |
35 | if (element instanceof IJavaElement) { | |
36 | jElement= (IJavaElement)element; | |
37 | resource= jElement.getResource(); | |
38 | } else { | |
39 | if (element instanceof IAdaptable) { | |
40 | resource= (IResource)((IAdaptable)element).getAdapter(IResource.class); | |
41 | if (resource != null) { | |
42 | if (fJavaModel.contains(resource)) { | |
43 | jElement= JavaCore.create(resource); | |
44 | if (jElement != null && !jElement.exists()) | |
45 | jElement= null; | |
46 | } | |
47 | } | |
48 | } | |
49 | } | |
50 | ||
51 | if (jElement != null) { | |
52 | if (contains(workingSetJavaElement, jElement, flags)) | |
53 | return true; | |
54 | if (workingSetJavaElement.getElementType() == IJavaElement.PACKAGE_FRAGMENT && | |
55 | resource.getType() == IResource.FOLDER && checkIfDescendant(flags)) | |
56 | return isChild(workingSetJavaElement, resource); | |
57 | } else if (resource != null) { | |
58 | return contains(workingSetJavaElement, resource, flags); | |
59 | } | |
60 | return false; | |
61 | } | |
62 | ||
63 | private boolean contains(IJavaElement workingSetElement, IJavaElement element, int flags) { | |
64 | if (checkContext(flags) && workingSetElement.equals(element)) { | |
65 | return true; | |
66 | } | |
67 | if (checkIfChild(flags) && workingSetElement.equals(element.getParent())) { | |
68 | return true; | |
69 | } | |
70 | if (checkIfDescendant(flags) && check(workingSetElement, element)) { | |
71 | return true; | |
72 | } | |
73 | if (checkIfAncestor(flags) && check(element, workingSetElement)) { | |
74 | return true; | |
75 | } | |
76 | return false; | |
77 | } | |
78 | ||
79 | private boolean check(IJavaElement ancestor, IJavaElement descendent) { | |
80 | descendent= descendent.getParent(); | |
81 | while (descendent != null) { | |
82 | if (ancestor.equals(descendent)) | |
83 | return true; | |
84 | descendent= descendent.getParent(); | |
85 | } | |
86 | return false; | |
87 | } | |
88 | ||
89 | private boolean isChild(IJavaElement workingSetElement, IResource element) { | |
90 | IResource resource= workingSetElement.getResource(); | |
91 | if (resource == null) | |
92 | return false; | |
93 | return check(element, resource); | |
94 | } | |
95 | ||
96 | private boolean contains(IJavaElement workingSetElement, IResource element, int flags) { | |
97 | IResource workingSetResource= workingSetElement.getResource(); | |
98 | if (workingSetResource == null) | |
99 | return false; | |
100 | if (checkContext(flags) && workingSetResource.equals(element)) { | |
101 | return true; | |
102 | } | |
103 | if (checkIfChild(flags) && workingSetResource.equals(element.getParent())) { | |
104 | return true; | |
105 | } | |
106 | if (checkIfDescendant(flags) && check(workingSetResource, element)) { | |
107 | return true; | |
108 | } | |
109 | if (checkIfAncestor(flags) && check(element, workingSetResource)) { | |
110 | return true; | |
111 | } | |
112 | return false; | |
113 | } | |
114 | ||
115 | private boolean check(IResource ancestor, IResource descendent) { | |
116 | descendent= descendent.getParent(); | |
117 | while(descendent != null) { | |
118 | if (ancestor.equals(descendent)) | |
119 | return true; | |
120 | descendent= descendent.getParent(); | |
121 | } | |
122 | return false; | |
123 | } | |
124 | ||
125 | private boolean checkIfDescendant(int flags) { | |
126 | return (flags & CHECK_IF_DESCENDANT) != 0; | |
127 | } | |
128 | ||
129 | private boolean checkIfAncestor(int flags) { | |
130 | return (flags & CHECK_IF_ANCESTOR) != 0; | |
131 | } | |
132 | ||
133 | private boolean checkIfChild(int flags) { | |
134 | return (flags & CHECK_IF_CHILD) != 0; | |
135 | } | |
136 | ||
137 | private boolean checkContext(int flags) { | |
138 | return (flags & CHECK_CONTEXT) != 0; | |
139 | } | |
140 | } |