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author | antelder <antelder@13f79535-47bb-0310-9956-ffa450edef68> | 2011-08-03 09:21:41 +0000 |
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committer | antelder <antelder@13f79535-47bb-0310-9956-ffa450edef68> | 2011-08-03 09:21:41 +0000 |
commit | 1fb6a28a73ca17dbb8c4b3059db590e2f9620943 (patch) | |
tree | 71d9c9a70ce373cecc4597c2880a5047e0353d07 /sca-java-1.x/tags/1.6-TUSCANY-3909/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/DefaultPackageProcessorExtensionPoint.java | |
parent | 7ad16a07b4288227c531c485939318768129fb54 (diff) |
Correct tag name
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1153404 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'sca-java-1.x/tags/1.6-TUSCANY-3909/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/DefaultPackageProcessorExtensionPoint.java')
-rw-r--r-- | sca-java-1.x/tags/1.6-TUSCANY-3909/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/DefaultPackageProcessorExtensionPoint.java | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.6-TUSCANY-3909/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/DefaultPackageProcessorExtensionPoint.java b/sca-java-1.x/tags/1.6-TUSCANY-3909/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/DefaultPackageProcessorExtensionPoint.java new file mode 100644 index 0000000000..3c25424325 --- /dev/null +++ b/sca-java-1.x/tags/1.6-TUSCANY-3909/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/DefaultPackageProcessorExtensionPoint.java @@ -0,0 +1,129 @@ +/* + * 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.processor; + +import java.io.IOException; +import java.io.InputStream; +import java.lang.reflect.Constructor; +import java.net.MalformedURLException; +import java.net.URI; +import java.net.URL; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Set; + +import org.apache.tuscany.sca.contribution.service.ContributionException; +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +import org.apache.tuscany.sca.extensibility.ServiceDiscovery; + +/** + * Default implementation of a package processor extension point. + * + * @version $Rev$ $Date$ + */ +public class DefaultPackageProcessorExtensionPoint implements PackageProcessorExtensionPoint { + + private Map<String, PackageProcessor> processors = new HashMap<String, PackageProcessor>(); + private boolean loaded; + + public DefaultPackageProcessorExtensionPoint() { + } + + public void addPackageProcessor(PackageProcessor processor) { + processors.put(processor.getPackageType(), processor); + } + + public void removePackageProcessor(PackageProcessor processor) { + processors.remove(processor.getPackageType()); + } + + public PackageProcessor getPackageProcessor(String contentType) { + loadProcessors(); + return processors.get(contentType); + } + + private synchronized void loadProcessors() { + if (loaded) + return; + + // Get the processor service declarations + Set<ServiceDeclaration> processorDeclarations; + try { + processorDeclarations = ServiceDiscovery.getInstance().getServiceDeclarations(PackageProcessor.class); + } catch (IOException e) { + throw new IllegalStateException(e); + } + + for (ServiceDeclaration processorDeclaration: processorDeclarations) { + Map<String, String> attributes = processorDeclaration.getAttributes(); + + // Load a URL artifact processor + String packageType = attributes.get("type"); + + // Create a processor wrapper and register it + PackageProcessor processor = new LazyPackageProcessor(packageType, processorDeclaration); + addPackageProcessor(processor); + } + + loaded = true; + } + + /** + * A facade for package processors. + */ + private static class LazyPackageProcessor implements PackageProcessor { + + private ServiceDeclaration processorDeclaration; + private String packageType; + private PackageProcessor processor; + + private LazyPackageProcessor(String packageType, ServiceDeclaration processorDeclaration) { + this.processorDeclaration = processorDeclaration; + this.packageType = packageType; + } + + public URL getArtifactURL(URL packageSourceURL, URI artifact) throws MalformedURLException { + return getProcessor().getArtifactURL(packageSourceURL, artifact); + } + + public List<URI> getArtifacts(URL packageSourceURL, InputStream inputStream) throws ContributionException, IOException { + return getProcessor().getArtifacts(packageSourceURL, inputStream); + } + + public String getPackageType() { + return packageType; + } + + @SuppressWarnings("unchecked") + private PackageProcessor getProcessor() { + if (processor == null) { + try { + Class<PackageProcessor> processorClass = (Class<PackageProcessor>)processorDeclaration.loadClass(); + Constructor<PackageProcessor> constructor = processorClass.getConstructor(); + processor = constructor.newInstance(); + } catch (Exception e) { + throw new IllegalStateException(e); + } + } + return processor; + } + } +} |