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/*******************************************************************************
* Copyright (c) 2006 Sybase, Inc. and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.properties.internal;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jst.pagedesigner.PDPlugin;
import org.eclipse.wst.common.ui.properties.internal.provisional.ISectionDescriptor;
import org.eclipse.wst.common.ui.properties.internal.provisional.ISectionDescriptorProvider;
/**
* The DesignerTagPropertySectionDescriptorProvider will provide the section
* descriptiors. Now section descriptor come from two sources.
*
* One is reading from the "org.eclipse.jst.pagedesigner.propertyContributor"
* extension point. This extension point will contribute additional section
* providers, which provides a set of sections.
*
* One is reading from the "org.eclipse.jst.pagedesigner.propertySections"
* extension point. This extension provide a single section.
*
* @author mengbo
* @version 1.5
*/
public class DesignerTabPropertySectionDescriptorProvider implements
ISectionDescriptorProvider {
private static final String EXTPT_SECTIONS = "propertySections"; //$NON-NLS-1$
private static final String ELEMENT_SECTION = "propertySection"; //$NON-NLS-1$
private static final String EXTPT_SECTIONDESCRIPTORPROVIDER = "propertyContributor";
private static final String ELEMENT_PROPERTYCONTRIBUTOR = "propertyContributor";
private static final String ATTR_SECTIONDESCRIPTORPROVIDER = "sectionDescriptorProvider";
ISectionDescriptor[] _descriptors = null;
/**
*
*/
public DesignerTabPropertySectionDescriptorProvider() {
super();
}
/*
* (non-Javadoc)
*
* @see org.eclipse.wst.common.ui.properties.internal.provisional.ISectionDescriptorProvider#getSectionDescriptors()
*/
public ISectionDescriptor[] getSectionDescriptors() {
if (_descriptors == null) {
List result = new ArrayList();
List contributedSections = readSectionDescriptors();
result.addAll(contributedSections);
List providers = readAdditionalSectionDescriptorProviders();
for (int i = 0, size = providers.size(); i < size; i++) {
try {
ISectionDescriptorProvider provider = (ISectionDescriptorProvider) providers
.get(i);
ISectionDescriptor[] sections = provider
.getSectionDescriptors();
if (sections != null) {
result.addAll(Arrays.asList(sections));
}
} catch (Exception ex) {
// ignore
ex.printStackTrace();
}
}
_descriptors = new ISectionDescriptor[result.size()];
result.toArray(_descriptors);
}
return _descriptors;
}
/**
* @return the providers
*/
protected List readAdditionalSectionDescriptorProviders() {
List result = new ArrayList();
IConfigurationElement[] extensions = getConfigurationElements(EXTPT_SECTIONDESCRIPTORPROVIDER);
for (int i = 0; i < extensions.length; i++) {
IConfigurationElement extension = extensions[i];
if (ELEMENT_PROPERTYCONTRIBUTOR.equals(extension.getName())) {
IConfigurationElement contributor = extension;
try {
Object obj = contributor
.createExecutableExtension(ATTR_SECTIONDESCRIPTORPROVIDER);
if (obj instanceof ISectionDescriptorProvider) {
result.add(obj);
}
} catch (CoreException ex) {
ex.printStackTrace();
}
}
}
return result;
}
/**
* @return the descriptors
*/
protected List readSectionDescriptors() {
List result = new ArrayList();
IConfigurationElement[] extensions = getConfigurationElements(EXTPT_SECTIONS);
for (int i = 0; i < extensions.length; i++) {
IConfigurationElement extension = extensions[i];
IConfigurationElement[] sections = extension
.getChildren(ELEMENT_SECTION);
for (int j = 0; j < sections.length; j++) {
IConfigurationElement section = sections[j];
ISectionDescriptor descriptor = new DesignerSectionDescriptor(
section);
result.add(descriptor);
}
}
return result;
}
/**
* @param extensionPointId
* @return the configuration element
*/
public static IConfigurationElement[] getConfigurationElements(
String extensionPointId) {
IExtensionPoint extensionPoint = Platform.getExtensionRegistry()
.getExtensionPoint(PDPlugin.getPluginId(), extensionPointId);
if (extensionPoint == null) {
return null;
}
return extensionPoint.getConfigurationElements();
}
}
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