/*******************************************************************************
* Copyright (c) 2015-2016 Obeo, Inria
* 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:
* - William Piers <william.piers@obeo.fr>
* - Philippe Merle <philippe.merle@inria.fr>
*******************************************************************************/
package org.occiware.clouddesigner.occi;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.Platform;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.URIConverter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public final class OCCIRegistry
{
/**
* Initialize the logger.
*/
private static Logger LOGGER = LoggerFactory.getLogger(OCCIRegistry.class);
/**
* The occie extension point.
*/
private static final String OCCIE_EXTENSION_POINT = "org.occiware.clouddesigner.occi.occie"; //$NON-NLS-1$
/**
* Stores OCCI extensions URIs per scheme.
*/
private static Map<String, String> registry = new HashMap<String, String>();
/**
* Constructor.
*
* @throws CoreException
*/
private OCCIRegistry() {
initialize();
}
private static OCCIRegistry instance;
public static OCCIRegistry getInstance() {
if (instance == null) {
instance = new OCCIRegistry();
}
return instance;
}
/**
* Initializes the extensions map.
*
* @throws CoreException
* if the registry cannot be initialized
*/
public void initialize() {
try {
if (Platform.isRunning()) {
registry.clear();
final IExtension[] extensions = Platform.getExtensionRegistry()
.getExtensionPoint(OCCIE_EXTENSION_POINT).getExtensions();
for (int i = 0; i < extensions.length; i++) {
final IConfigurationElement[] configElements = extensions[i]
.getConfigurationElements();
for (int j = 0; j < configElements.length; j++) {
String scheme = configElements[j].getAttribute("scheme"); //$NON-NLS-1$
String uri = "platform:/plugin/" + extensions[i].getContributor().getName() + "/" + configElements[j].getAttribute("file"); //$NON-NLS-1$
registerExtension(scheme, uri);
}
}
}
} catch(NoClassDefFoundError ncdfe) {
LOGGER.info(" Running out of an Eclipse Platform...");
}
}
/**
* Registers an extension.
*
* @param scheme
* the extension scheme
* @param uri
* the {@link Extension} URI
*/
public void registerExtension(String scheme, String uri) {
registry.put(scheme, uri);
// Add a mapping from the extension scheme to its file URI.
String tmp = scheme.substring(0, scheme.length()-1);
URIConverter.URI_MAP.put(URI.createURI(tmp), URI.createURI(uri));
}
/**
* Retrieves the {@link Extension} URI associated to the given scheme if
* existing.
*
* @param scheme
* the extension scheme
* @return the {@link Extension} URI
*/
public String getExtensionURI(String scheme) {
String tmp = registry.get(scheme);
return tmp == null ? null : scheme.substring(0,scheme.length()-1);
}
/**
* Retrieves the {@link Extension} file associated to a given scheme if
* existing.
*
* @param scheme
* the extension scheme
* @return the {@link Extension} file URI
*/
public String getFileURI(String scheme) {
return registry.get(scheme);
}
public Collection<String> getRegisteredExtensions() {
return registry.keySet();
}
}