1 /*******************************************************************************
2 * Copyright (c) 2000, 2003 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Common Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/cpl-v10.html
9 * IBM Corporation - initial API and implementation
10 *******************************************************************************/
11 package net.sourceforge.phpdt.internal.ui.text.folding;
13 import org.eclipse.core.runtime.CoreException;
14 import org.eclipse.core.runtime.IConfigurationElement;
16 import org.eclipse.jface.text.Assert;
18 import net.sourceforge.phpdt.ui.text.folding.IJavaFoldingPreferenceBlock;
19 import net.sourceforge.phpdt.ui.text.folding.IJavaFoldingStructureProvider;
22 * Describes a contribution to the folding provider extension point.
26 public final class JavaFoldingStructureProviderDescriptor {
28 /* extension point attribute names */
30 private static final String PREFERENCES_CLASS= "preferencesClass"; //$NON-NLS-1$
31 private static final String CLASS= "class"; //$NON-NLS-1$
32 private static final String NAME= "name"; //$NON-NLS-1$
33 private static final String ID= "id"; //$NON-NLS-1$
35 /** The identifier of the extension. */
37 /** The name of the extension. */
39 /** The class name of the provided <code>IJavaFoldingStructureProvider</code>. */
40 private String fClass;
42 * <code>true</code> if the extension specifies a custom
43 * <code>IJavaFoldingPreferenceBlock</code>.
45 private boolean fHasPreferences;
46 /** The configuration element of this extension. */
47 private IConfigurationElement fElement;
50 * Creates a new descriptor.
52 * @param element the configuration element to read
54 JavaFoldingStructureProviderDescriptor(IConfigurationElement element) {
56 fId= element.getAttributeAsIs(ID);
57 Assert.isLegal(fId != null);
59 fName= element.getAttribute(NAME);
63 fClass= element.getAttributeAsIs(CLASS);
64 Assert.isLegal(fClass != null);
66 if (element.getAttributeAsIs(PREFERENCES_CLASS) == null)
67 fHasPreferences= false;
69 fHasPreferences= true;
73 * Creates a folding provider as described in the extension's xml.
75 * @return a new instance of the folding provider described by this
77 * @throws CoreException if creation fails
79 public IJavaFoldingStructureProvider createProvider() throws CoreException {
80 IJavaFoldingStructureProvider prov= (IJavaFoldingStructureProvider) fElement.createExecutableExtension(CLASS);
85 * Creates a preferences object as described in the extension's xml.
87 * @return a new instance of the reference provider described by this
89 * @throws CoreException if creation fails
91 public IJavaFoldingPreferenceBlock createPreferences() throws CoreException {
92 if (fHasPreferences) {
93 IJavaFoldingPreferenceBlock prefs= (IJavaFoldingPreferenceBlock) fElement.createExecutableExtension(PREFERENCES_CLASS);
96 return new EmptyJavaFoldingPreferenceBlock();
101 * Returns the identifier of the described extension.
103 * @return Returns the id
105 public String getId() {
110 * Returns the name of the described extension.
112 * @return Returns the name
114 public String getName() {