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/*******************************************************************************
* Copyright (c) 2010 Sonatype, Inc.
* 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:
* Sonatype, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.m2e.jdt.internal;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.Platform;
import org.eclipse.m2e.core.project.IMavenProjectFacade;
import org.eclipse.m2e.jdt.AbstractClassifierClasspathProvider;
import org.eclipse.m2e.jdt.IClassifierClasspathProvider;
import org.eclipse.m2e.jdt.IMavenClassifierManager;
/**
* MavenClassifierManager
*
* @author Fred Bricon
*/
public class MavenClassifierManager implements IMavenClassifierManager {
private static final String EXTENSION_CLASSIFIER_CLASSPATH_PROVIDERS = "org.eclipse.m2e.jdt.classifierClasspathProviders";
private static final Logger log = LoggerFactory.getLogger(MavenClassifierManager.class);
private static final IClassifierClasspathProvider NO_OP_CLASSIFIER_CLASSPATH_PROVIDER = new AbstractClassifierClasspathProvider() {
public String getClassifier() {
return "(__ignore_classifier__)";
}
public boolean applies(IMavenProjectFacade mavenProjectFacade, String classifier) {
return false;
}
public String toString() {
return "No-Op Classifier Classpath Provider";
}
};
private Map<String, List<IClassifierClasspathProvider>> classifierClasspathProvidersMap;
public IClassifierClasspathProvider getClassifierClasspathProvider(IMavenProjectFacade project, String classifier) {
List<IClassifierClasspathProvider> allProviders = getClassifierClasspathProviders(classifier);
List<IClassifierClasspathProvider> compatibleProviders = new ArrayList<IClassifierClasspathProvider>();
if(allProviders != null) {
for(IClassifierClasspathProvider p : allProviders) {
if(p.applies(project, classifier)) {
compatibleProviders.add(p);
}
}
}
switch(compatibleProviders.size()) {
case 0:
//nothing here
break;
case 1:
return compatibleProviders.get(0);
default:
//TODO display/log error message
}
return NO_OP_CLASSIFIER_CLASSPATH_PROVIDER;
}
protected List<IClassifierClasspathProvider> getClassifierClasspathProviders(String classifier) {
if(classifierClasspathProvidersMap == null) {
classifierClasspathProvidersMap = readExtensions();
}
return classifierClasspathProvidersMap.get(classifier);
}
protected static synchronized Map<String, List<IClassifierClasspathProvider>> readExtensions() {
Map<String, List<IClassifierClasspathProvider>> map = new HashMap<String, List<IClassifierClasspathProvider>>();
IExtensionRegistry registry = Platform.getExtensionRegistry();
IExtensionPoint ccpExtensionPoint = registry.getExtensionPoint(EXTENSION_CLASSIFIER_CLASSPATH_PROVIDERS);
if(ccpExtensionPoint != null) {
IExtension[] ccpExtensions = ccpExtensionPoint.getExtensions();
for(IExtension extension : ccpExtensions) {
for(IConfigurationElement element : extension.getConfigurationElements()) {
IClassifierClasspathProvider classifierClasspathProvider = null;
try {
classifierClasspathProvider = (IClassifierClasspathProvider) element.createExecutableExtension("class");
String classifier = classifierClasspathProvider.getClassifier();
List<IClassifierClasspathProvider> providers = map.get(classifier);
if(providers == null) {
providers = new ArrayList<IClassifierClasspathProvider>(1);
map.put(classifier, providers);
}
providers.add(classifierClasspathProvider);
} catch(CoreException ex) {
log.debug("Can not instanciate IClassifierClasspathProvider", ex);
}
}
}
}
return map;
}
}
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