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Diffstat (limited to '')
-rw-r--r-- | sca-java-2.x/tags/2.0-Beta1-RC2/modules/contribution-osgi/src/main/java/org/apache/tuscany/sca/contribution/osgi/impl/OSGiBundleReferenceModelResolver.java | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0-Beta1-RC2/modules/contribution-osgi/src/main/java/org/apache/tuscany/sca/contribution/osgi/impl/OSGiBundleReferenceModelResolver.java b/sca-java-2.x/tags/2.0-Beta1-RC2/modules/contribution-osgi/src/main/java/org/apache/tuscany/sca/contribution/osgi/impl/OSGiBundleReferenceModelResolver.java new file mode 100644 index 0000000000..7958eb4b6d --- /dev/null +++ b/sca-java-2.x/tags/2.0-Beta1-RC2/modules/contribution-osgi/src/main/java/org/apache/tuscany/sca/contribution/osgi/impl/OSGiBundleReferenceModelResolver.java @@ -0,0 +1,117 @@ +/* + * 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.osgi.BundleReference; +import org.apache.tuscany.sca.contribution.processor.ProcessorContext; +import org.apache.tuscany.sca.contribution.resolver.ModelResolver; +import org.apache.tuscany.sca.core.FactoryExtensionPoint; +import org.osgi.framework.Bundle; + +/** + * A Model Resolver for BundleReferences. + * + * @version $Rev$ $Date$ + */ +public class OSGiBundleReferenceModelResolver implements ModelResolver { + private Contribution contribution; + private Map<BundleReference, BundleReference> refs = new HashMap<BundleReference, BundleReference>(); + + private OSGiBundleProcessor bundleProcessor; + + public OSGiBundleReferenceModelResolver(Contribution contribution, FactoryExtensionPoint modelFactories) { + this.contribution = contribution; + this.bundleProcessor = new OSGiBundleProcessor(); + } + + public void addModel(Object resolved, ProcessorContext context) { + BundleReference bundleRef = (BundleReference)resolved; + refs.put(bundleRef, bundleRef); + } + + public Object removeModel(Object resolved, ProcessorContext context) { + return refs.remove(resolved); + } + + /** + * Handle artifact resolution when the specific class reference is imported from another contribution + * @param unresolved + * @param context + * @return + */ + private BundleReference resolveImportedModel(BundleReference unresolved, ProcessorContext context) { + BundleReference resolved = unresolved; + + if (this.contribution != null) { + for (Import import_ : this.contribution.getImports()) { + + resolved = import_.getModelResolver().resolveModel(BundleReference.class, unresolved, context); + if (resolved != unresolved) + break; + } + + } + return resolved; + } + + public <T> T resolveModel(Class<T> modelClass, T unresolved, ProcessorContext context) { + Object resolved = refs.get(unresolved); + + if (resolved != null) { + return modelClass.cast(resolved); + } + + if (OSGiBundleActivator.getBundleContext() == null) + return unresolved; + + //Load a class on demand + Bundle bundle = null; + String bundleName = ((BundleReference)unresolved).getSymbolicName(); + String bundleVersion = ((BundleReference)unresolved).getVersion(); + + bundle = OSGiBundleActivator.findBundle(bundleName, bundleVersion); + BundleReference bundleReference; + + if (bundle == null) { + bundleReference = bundleProcessor.installNestedBundle(contribution, bundleName, bundleVersion); + } else { + bundleReference = new BundleReference(bundle); + } + + if (bundleReference != null) { + //if we load the class + + refs.put(((BundleReference)unresolved), bundleReference); + + // Return the resolved BundleReference + return modelClass.cast(bundleReference); + } else { + //delegate resolution of the class + resolved = this.resolveImportedModel((BundleReference)unresolved, context); + return modelClass.cast(resolved); + } + + } +} |