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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.contribution.osgi.impl;
import java.util.HashMap;
import java.util.Map;
import org.apache.tuscany.sca.contribution.Contribution;
import org.apache.tuscany.sca.contribution.Import;
import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
import org.apache.tuscany.sca.contribution.osgi.BundleReference;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.apache.tuscany.sca.osgi.runtime.OSGiRuntime;
import org.osgi.framework.Bundle;
/**
* A Model Resolver for BundleReferences.
*
* @version $Rev$ $Date$
*/
public class OSGiBundleReferenceModelResolver implements ModelResolver {
private Contribution contribution;
private Map<String, BundleReference> map = new HashMap<String, BundleReference>();
OSGiRuntime osgiRuntime;
private OSGiBundleProcessor bundleProcessor;
public OSGiBundleReferenceModelResolver(Contribution contribution, ModelFactoryExtensionPoint modelFactories) {
this.contribution = contribution;
this.bundleProcessor = new OSGiBundleProcessor();
}
public void addModel(Object resolved) {
BundleReference bundleRef = (BundleReference)resolved;
map.put(bundleRef.getBundleUniqueName(), bundleRef);
}
public Object removeModel(Object resolved) {
return map.remove(((BundleReference)resolved).getBundleUniqueName());
}
/**
* Handle artifact resolution when the specific class reference is imported from another contribution
* @param unresolved
* @return
*/
private BundleReference resolveImportedModel(BundleReference unresolved) {
BundleReference resolved = unresolved;
if( this.contribution != null) {
for (Import import_ : this.contribution.getImports()) {
resolved = import_.getModelResolver().resolveModel(BundleReference.class, unresolved);
if (resolved != unresolved)
break;
}
}
return resolved;
}
public <T> T resolveModel(Class<T> modelClass, T unresolved) {
Object resolved = map.get(unresolved);
if (resolved != null ){
return modelClass.cast(resolved);
}
try {
if (osgiRuntime == null)
osgiRuntime = OSGiRuntime.getRuntime();
} catch (Exception e) {
}
if (osgiRuntime == null)
return unresolved;
//Load a class on demand
Object bundle = null;
String bundleName = ((BundleReference)unresolved).getBundleName();
String bundleVersion = ((BundleReference)unresolved).getBundleVersion();
bundle = osgiRuntime.findBundle(bundleName, bundleVersion);
BundleReference bundleReference;
if (bundle == null)
bundleReference = bundleProcessor.installNestedBundle(contribution, bundleName, bundleVersion);
else {
bundleReference = new BundleReference(bundle,
((BundleReference)unresolved).getBundleName(),
bundleVersion,
getBundleFileName(bundle)
);
}
if (bundleReference != null) {
//if we load the class
map.put(((BundleReference)unresolved).getBundleUniqueName(), bundleReference);
// Return the resolved BundleReference
return modelClass.cast(bundleReference);
} else {
//delegate resolution of the class
resolved = this.resolveImportedModel((BundleReference)unresolved);
return modelClass.cast(resolved);
}
}
private String getBundleFileName(Object bundle) {
if (bundle instanceof Bundle) {
String path = ((Bundle)bundle).getLocation();
if (path.endsWith("/"))
path = path.substring(0, path.length()-1);
if (path.startsWith(contribution.getLocation())) {
if (path.equals(contribution.getLocation())) {
int index = path.lastIndexOf('/');
if (index > 0 && index < path.length()-1)
path = path.substring(index+1);
} else {
path = path.substring(contribution.getLocation().length());
if (path.startsWith("/"))
path = path.substring(1);
}
} else if (path.lastIndexOf('/') >= 0)
path = path.substring(path.lastIndexOf('/')+1);
return path;
}
return null;
}
}
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