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1
11 package org.eclipse.jdt.internal.ui.wizards.buildpaths;
12
13 import java.util.ArrayList  ;
14
15 import org.eclipse.core.runtime.CoreException;
16 import org.eclipse.core.runtime.IConfigurationElement;
17 import org.eclipse.core.runtime.IExtensionPoint;
18 import org.eclipse.core.runtime.IStatus;
19 import org.eclipse.core.runtime.Platform;
20 import org.eclipse.core.runtime.Status;
21
22 import org.eclipse.jdt.core.IClasspathEntry;
23
24 import org.eclipse.jdt.ui.JavaUI;
25 import org.eclipse.jdt.ui.wizards.IClasspathContainerPage;
26
27 import org.eclipse.jdt.internal.ui.JavaPlugin;
28 import org.eclipse.jdt.internal.ui.util.CoreUtility;
29
30
32 public class ClasspathContainerDescriptor {
33
34 private IConfigurationElement fConfigElement;
35 private IClasspathContainerPage fPage;
36
37 private static final String ATT_EXTENSION = "classpathContainerPage";
39 private static final String ATT_ID = "id"; private static final String ATT_NAME = "name"; private static final String ATT_PAGE_CLASS = "class";
43 public ClasspathContainerDescriptor(IConfigurationElement configElement) throws CoreException {
44 super();
45 fConfigElement = configElement;
46 fPage= null;
47
48 String id = fConfigElement.getAttribute(ATT_ID);
49 String name = configElement.getAttribute(ATT_NAME);
50 String pageClassName = configElement.getAttribute(ATT_PAGE_CLASS);
51
52 if (name == null) {
53 throw new CoreException(new Status(IStatus.ERROR, JavaUI.ID_PLUGIN, 0, "Invalid extension (missing name): " + id, null)); }
55 if (pageClassName == null) {
56 throw new CoreException(new Status(IStatus.ERROR, JavaUI.ID_PLUGIN, 0, "Invalid extension (missing page class name): " + id, null)); }
58 }
59
60 public IClasspathContainerPage createPage() throws CoreException {
61 if (fPage == null) {
62 Object elem= CoreUtility.createExtension(fConfigElement, ATT_PAGE_CLASS);
63 if (elem instanceof IClasspathContainerPage) {
64 fPage= (IClasspathContainerPage) elem;
65 } else {
66 String id= fConfigElement.getAttribute(ATT_ID);
67 throw new CoreException(new Status(IStatus.ERROR, JavaUI.ID_PLUGIN, 0, "Invalid extension (page not of type IClasspathContainerPage): " + id, null)); }
69 }
70 return fPage;
71 }
72
73 public IClasspathContainerPage getPage() {
74 return fPage;
75 }
76
77 public void setPage(IClasspathContainerPage page) {
78 fPage= page;
79 }
80
81 public void dispose() {
82 if (fPage != null) {
83 fPage.dispose();
84 fPage= null;
85 }
86 }
87
88 public String getName() {
89 return fConfigElement.getAttribute(ATT_NAME);
90 }
91
92 public String getPageClass() {
93 return fConfigElement.getAttribute(ATT_PAGE_CLASS);
94 }
95
96 public boolean canEdit(IClasspathEntry entry) {
97 String id = fConfigElement.getAttribute(ATT_ID);
98 if (entry.getEntryKind() == IClasspathEntry.CPE_CONTAINER) {
99 String type = entry.getPath().segment(0);
100 return id.equals(type);
101 }
102 return false;
103 }
104
105 public static ClasspathContainerDescriptor[] getDescriptors() {
106 ArrayList containers= new ArrayList ();
107
108 IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(JavaUI.ID_PLUGIN, ATT_EXTENSION);
109 if (extensionPoint != null) {
110 ClasspathContainerDescriptor defaultPage= null;
111 String defaultPageName= ClasspathContainerDefaultPage.class.getName();
112
113 IConfigurationElement[] elements = extensionPoint.getConfigurationElements();
114 for (int i = 0; i < elements.length; i++) {
115 try {
116 ClasspathContainerDescriptor curr= new ClasspathContainerDescriptor(elements[i]);
117 if (defaultPageName.equals(curr.getPageClass())) {
118 defaultPage= curr;
119 } else {
120 containers.add(curr);
121 }
122 } catch (CoreException e) {
123 JavaPlugin.log(e);
124 }
125 }
126 if (defaultPageName != null && containers.isEmpty()) {
127 containers.add(defaultPage);
129 }
130 }
131 return (ClasspathContainerDescriptor[]) containers.toArray(new ClasspathContainerDescriptor[containers.size()]);
132 }
133
134 }
135 |
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