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/*******************************************************************************
* Copyright (c) 2010 Alena Laskavaia
* 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:
* Alena Laskavaia - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.codan.internal.ui.views;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import org.eclipse.cdt.codan.internal.ui.CodanUIActivator;
import org.eclipse.cdt.codan.ui.AbstractCodanProblemDetailsProvider;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.Platform;
/**
* Class that can load extension for problemDetails
*/
public class ProblemDetailsExtensions {
public static final String ALL = "*";//$NON-NLS-1$
private static final String EXTENSION_POINT_NAME = "codanProblemDetails"; //$NON-NLS-1$
private static boolean extensionsLoaded;
private static HashMap<String, Collection<?>> map = new HashMap<String, Collection<?>>();
private static synchronized void readExtensions() {
if (extensionsLoaded) return;
IExtensionPoint ep = Platform.getExtensionRegistry().getExtensionPoint(CodanUIActivator.PLUGIN_ID, EXTENSION_POINT_NAME);
if (ep == null)
return;
try {
IConfigurationElement[] elements = ep.getConfigurationElements();
// process categories
for (int i = 0; i < elements.length; i++) {
IConfigurationElement configurationElement = elements[i];
processDetails(configurationElement);
}
} finally {
extensionsLoaded = true;
}
}
/**
* @param configurationElement
*/
private static void processDetails(IConfigurationElement configurationElement) {
if (configurationElement.getName().equals("problemDetails")) { //$NON-NLS-1$
String id = configurationElement.getAttribute("problemId"); //$NON-NLS-1$
if (id == null) {
id = ALL;
}
addExtension(id, configurationElement);
}
}
public static AbstractCodanProblemDetailsProvider resolveClass(IConfigurationElement configurationElement) {
AbstractCodanProblemDetailsProvider res;
try {
res = (AbstractCodanProblemDetailsProvider) configurationElement.createExecutableExtension("class");//$NON-NLS-1$
} catch (CoreException e) {
CodanUIActivator.log(e);
return null;
}
return res;
}
@SuppressWarnings({ "unchecked", "rawtypes" })
private static void addExtension(String id, IConfigurationElement configurationElement) {
Collection collection = getCollection(id);
collection.add(configurationElement);
}
/**
* Remove provider from the list
* @param id - codan problem id or ALL
* @param el - details provider (class extending AbstractCodanProblemDetailsProvider) or ElementConfiguration (user internally)
*/
@SuppressWarnings("rawtypes")
public static void removeExtension(String id, Object el) {
Collection collection = getCollection(id);
collection.remove(el);
}
@SuppressWarnings("rawtypes")
private static Collection getCollection(String id) {
Collection collection = map.get(id);
if (collection == null) {
collection = new ArrayList();
map.put(id, collection);
}
return collection;
}
public static Collection<AbstractCodanProblemDetailsProvider> getProviders(String id) {
readExtensions();
Collection<AbstractCodanProblemDetailsProvider> providers = new ArrayList<AbstractCodanProblemDetailsProvider>();
Collection<?> collection1 = getCollection(id);
Collection<?> collection2 = getCollection(ALL);
providers.addAll(resolveProviders(collection1));
providers.addAll(resolveProviders(collection2));
return providers;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public static Collection<AbstractCodanProblemDetailsProvider> resolveProviders(Collection collection) {
Collection res = new ArrayList(collection);
for (Iterator iterator = res.iterator(); iterator.hasNext();) {
Object object = iterator.next();
if (object instanceof IConfigurationElement) {
// resolve
collection.remove(object);
AbstractCodanProblemDetailsProvider provider = resolveClass((IConfigurationElement) object);
if (provider!=null)
collection.add(provider);
}
}
return collection;
}
/**
* Add extension (details provider) using API
* @param id - codan problem id or ALL
* @param provider - class extending AbstractCodanProblemDetailsProvider
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
public static void addExtension(String id, AbstractCodanProblemDetailsProvider provider) {
Collection collection = getCollection(id);
collection.add(provider);
}
}
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