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author | dims <dims@13f79535-47bb-0310-9956-ffa450edef68> | 2008-06-17 00:23:01 +0000 |
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committer | dims <dims@13f79535-47bb-0310-9956-ffa450edef68> | 2008-06-17 00:23:01 +0000 |
commit | bdd0a41aed7edf21ec2a65cfa17a86af2ef8c48a (patch) | |
tree | 38a92061c0793434c4be189f1d70c3458b6bc41d /branches/sca-java-1.0/modules/contribution-osgi/src/main/java/org/apache/tuscany/sca/contribution/osgi/impl/OSGiModelResolverImpl.java |
Move Tuscany from Incubator to top level.
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@668359 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'branches/sca-java-1.0/modules/contribution-osgi/src/main/java/org/apache/tuscany/sca/contribution/osgi/impl/OSGiModelResolverImpl.java')
-rw-r--r-- | branches/sca-java-1.0/modules/contribution-osgi/src/main/java/org/apache/tuscany/sca/contribution/osgi/impl/OSGiModelResolverImpl.java | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/branches/sca-java-1.0/modules/contribution-osgi/src/main/java/org/apache/tuscany/sca/contribution/osgi/impl/OSGiModelResolverImpl.java b/branches/sca-java-1.0/modules/contribution-osgi/src/main/java/org/apache/tuscany/sca/contribution/osgi/impl/OSGiModelResolverImpl.java new file mode 100644 index 0000000000..9f1fcfb606 --- /dev/null +++ b/branches/sca-java-1.0/modules/contribution-osgi/src/main/java/org/apache/tuscany/sca/contribution/osgi/impl/OSGiModelResolverImpl.java @@ -0,0 +1,118 @@ +/* + * 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.Collection; +import java.util.HashMap; +import java.util.Hashtable; +import java.util.Map; + +import org.apache.tuscany.sca.contribution.osgi.BundleReference; +import org.apache.tuscany.sca.contribution.resolver.ClassReference; +import org.apache.tuscany.sca.contribution.resolver.ModelResolver; +import org.osgi.framework.Bundle; + +/** + * An implementation of an artifact resolver for OSGi bundles. + * + */ +public class OSGiModelResolverImpl implements ModelResolver { + private static final long serialVersionUID = -7826976465762296634L; + + private Map<Object, Object> map = new HashMap<Object, Object>(); + + private Hashtable<String, Bundle> bundles; + public OSGiModelResolverImpl(Hashtable<String, Bundle> bundles) { + this.bundles = bundles; + } + + + public <T> T resolveModel(Class<T> modelClass, T unresolved) { + Object resolved = map.get(unresolved); + if (resolved != null) { + + // Return the resolved object + return modelClass.cast(resolved); + + } else if (unresolved instanceof ClassReference) { + + // Load a class on demand + ClassReference classReference = (ClassReference)unresolved; + Class clazz = null; + for (Bundle bundle : bundles.values()) { + try { + clazz = bundle.loadClass(classReference.getClassName()); + } catch (ClassNotFoundException e) { + continue; + } + break; + } + if (clazz == null) { + + // Return the unresolved object + return unresolved; + } + + // Store a new ClassReference wrappering the loaded class + resolved = new ClassReference(clazz); + map.put(resolved, resolved); + + // Return the resolved ClassReference + return modelClass.cast(resolved); + + } else if (unresolved instanceof BundleReference) { + for (String bundlePath: bundles.keySet()) { + Bundle bundle = bundles.get(bundlePath); + BundleReference bundleRef = (BundleReference)unresolved; + String bundleVersion = (String)bundle.getHeaders().get("Bundle-Version"); + if (bundle.getSymbolicName().equals(bundleRef.getBundleName())&& + (bundleVersion == null || bundleRef.getBundleVersion() == null || + bundleVersion.equals(bundleRef.getBundleVersion()))) { + + resolved = new BundleReference(bundle, + bundle.getSymbolicName(), + bundleVersion, + bundlePath); + map.put(resolved, resolved); + + // Return the resolved BundleReference + return modelClass.cast(resolved); + + } + } + } + + // Return the unresolved object + return unresolved; + } + + public void addModel(Object resolved) { + map.put(resolved, resolved); + } + + public Object removeModel(Object resolved) { + return map.remove(resolved); + } + + public Collection<Object> getModels() { + return map.values(); + } + +} |