1 files changed, 234 insertions, 0 deletions
diff --git a/tags/java/sca/2.0-M3-RC5/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/impl/ContributionInfoProcessor.java b/tags/java/sca/2.0-M3-RC5/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/impl/ContributionInfoProcessor.java
new file mode 100644
index 0000000000..ef435d6aed
--- /dev/null
+++ b/tags/java/sca/2.0-M3-RC5/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/impl/ContributionInfoProcessor.java
@@ -0,0 +1,234 @@
+/*
+ * 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.impl;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.net.URLConnection;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Composite;
+import org.apache.tuscany.sca.contribution.Contribution;
+import org.apache.tuscany.sca.contribution.ContributionFactory;
+import org.apache.tuscany.sca.contribution.ContributionMetadata;
+import org.apache.tuscany.sca.contribution.DefaultExport;
+import org.apache.tuscany.sca.contribution.DefaultImport;
+import org.apache.tuscany.sca.contribution.Export;
+import org.apache.tuscany.sca.contribution.Import;
+import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
+import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.processor.ExtensibleURLArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessorExtensionPoint;
+import org.apache.tuscany.sca.contribution.resolver.ClassReference;
+import org.apache.tuscany.sca.contribution.resolver.DefaultModelResolver;
+import org.apache.tuscany.sca.contribution.resolver.ExtensibleModelResolver;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolverExtensionPoint;
+import org.apache.tuscany.sca.contribution.scanner.ContributionScanner;
+import org.apache.tuscany.sca.contribution.scanner.impl.DirectoryContributionScanner;
+import org.apache.tuscany.sca.contribution.scanner.impl.JarContributionScanner;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+import org.apache.tuscany.sca.monitor.Monitor;
+
+/**
+ * URLArtifactProcessor that handles contribution files and returns a contribution
+ * info model.
+ *
+ * @version $Rev$ $Date$
+ */
+public class ContributionInfoProcessor implements URLArtifactProcessor<Contribution>{
+    private ContributionFactory contributionFactory;
+    private ModelResolverExtensionPoint modelResolvers;
+    private FactoryExtensionPoint modelFactories;
+    private URLArtifactProcessorExtensionPoint artifactProcessors;
+    private URLArtifactProcessor<Object> artifactProcessor;
+    private StAXArtifactProcessor<Object> extensionProcessor;
+
+    public ContributionInfoProcessor(ExtensionPointRegistry extensionPoints, StAXArtifactProcessor<Object> extensionProcessor, Monitor monitor) {
+        this.modelFactories = extensionPoints.getExtensionPoint(FactoryExtensionPoint.class);
+        this.modelResolvers = extensionPoints.getExtensionPoint(ModelResolverExtensionPoint.class);
+        hackResolvers(modelResolvers);
+        URLArtifactProcessorExtensionPoint artifactProcessors = extensionPoints.getExtensionPoint(URLArtifactProcessorExtensionPoint.class);
+        this.artifactProcessors = artifactProcessors;
+        this.artifactProcessor = new ExtensibleURLArtifactProcessor(artifactProcessors, monitor);
+        this.extensionProcessor = extensionProcessor;
+        this.contributionFactory = modelFactories.getFactory(ContributionFactory.class);
+    }
+
+    public ContributionInfoProcessor(FactoryExtensionPoint modelFactories, ModelResolverExtensionPoint modelResolvers, URLArtifactProcessor<Object> artifactProcessor) {
+        this.modelFactories = modelFactories;
+        this.modelResolvers = modelResolvers;
+        hackResolvers(modelResolvers);
+        this.artifactProcessor = artifactProcessor;
+        this.contributionFactory = modelFactories.getFactory(ContributionFactory.class);
+    }
+
+    public String getArtifactType() {
+        return ".contribution/info";
+    }
+
+    public Class<Contribution> getModelType() {
+        return null;
+    }
+
+    public Contribution read(URL parentURL, URI contributionURI, URL contributionURL) throws ContributionReadException {
+
+        // Create contribution model
+        Contribution contribution = contributionFactory.createContribution();
+        contribution.setURI(contributionURI.toString());
+        contribution.setLocation(contributionURL.toString());
+        ModelResolver modelResolver = new ExtensibleModelResolver(contribution, modelResolvers, modelFactories);
+        contribution.setModelResolver(modelResolver);
+        contribution.setUnresolved(true);
+
+        // Create a contribution scanner
+        ContributionScanner scanner = null;
+        if (scanner == null) {
+            try {
+                if ("file".equals(contributionURL.getProtocol()) && new File(contributionURL.toURI()).isDirectory()) {
+                    scanner = new DirectoryContributionScanner();
+                } else {
+                    scanner = new JarContributionScanner();
+                }
+            } catch (URISyntaxException e) {
+                throw new ContributionReadException(e);
+            }
+        }
+
+        // Read generated and user sca-contribution.xml files
+        boolean contributionMetadata = false;
+        for (String path: new String[]{
+                                       Contribution.SCA_CONTRIBUTION_GENERATED_META,
+                                       Contribution.SCA_CONTRIBUTION_META}) {
+            URL url = scanner.getArtifactURL(contribution, path);
+            try {
+                // Check if the file actually exists before trying to read it
+                URLConnection connection = url.openConnection();
+                connection.setUseCaches(false);
+                InputStream is = connection.getInputStream();
+                is.close();
+            } catch (IOException e) {
+                continue;
+            }
+            contributionMetadata = true;
+
+            // Read the sca-contribution.xml file
+            ContributionMetadata c = (ContributionMetadata)artifactProcessor.read(contributionURL, URI.create(path), url);
+            contribution.getImports().addAll(c.getImports());
+            contribution.getExports().addAll(c.getExports());
+            contribution.getDeployables().addAll(c.getDeployables());
+            contribution.getExtensions().addAll(c.getExtensions());
+            contribution.getAttributeExtensions().addAll(c.getAttributeExtensions());
+        }
+
+        // If no sca-contribution.xml file was provided then consider
+        // all composites in the contribution as deployables, and also
+        // read any files that are explicitly asssigned artifact processors
+        // as they are likely to provide relevant metadata info
+        if (!contributionMetadata) {
+            List<String> artifactURIs;
+            try {
+                artifactURIs = scanner.scan(contribution);
+            } catch (ContributionReadException e) {
+                artifactURIs = null;
+            }
+            if (artifactURIs != null) {
+                for (String artifactURI: artifactURIs) {
+                    boolean read = false;
+                    if (artifactURI.endsWith(".composite")) {
+                        read = true;
+                    } else {
+                        int s= artifactURI.lastIndexOf("/");
+                        String fileName = artifactURI.substring(s + 1);
+                        if (artifactProcessors.getProcessor(fileName) != null) {
+                            read = true;
+                        }
+                    }
+                    if (read) {
+                        URL artifactURL = scanner.getArtifactURL(contribution, artifactURI);
+
+                        // Read each artifact
+                        Object model = artifactProcessor.read(contributionURL, URI.create(artifactURI), artifactURL);
+
+                        // In the absence of more info, consider all composites as deployable
+                        if (model instanceof Composite) {
+                            contribution.getDeployables().add((Composite)model);
+                        }
+                    }
+                }
+            }
+
+            // Add default contribution import and export
+            DefaultImport defaultImport = contributionFactory.createDefaultImport();
+            defaultImport.setModelResolver(new DefaultModelResolver());
+            contribution.getImports().add(defaultImport);
+            DefaultExport defaultExport = contributionFactory.createDefaultExport();
+            contribution.getExports().add(defaultExport);
+        }
+
+        return contribution;
+    }
+
+    public void resolve(Contribution contribution, ModelResolver resolver) throws ContributionResolveException {
+
+        // Mark the contribution model resolved
+        ModelResolver contributionResolver = contribution.getModelResolver();
+        contribution.setUnresolved(false);
+        contributionResolver.addModel(contribution);
+
+        // Resolve imports and exports
+        for (Export export: contribution.getExports()) {
+            if (export instanceof DefaultExport) {
+
+                // Initialize the default export's resolver
+                export.setModelResolver(contributionResolver);
+
+            } else {
+                extensionProcessor.resolve(export, contributionResolver);
+            }
+        }
+        for (Import import_: contribution.getImports()) {
+            extensionProcessor.resolve(import_, contributionResolver);
+        }
+
+    }
+
+    /**
+     * FIXME Temporary hack for testing the ClassLoaderModelResolver.
+     *
+     * @param modelResolvers
+     */
+    private static void hackResolvers(ModelResolverExtensionPoint modelResolvers) {
+        Class<?> resolverClass = modelResolvers.getResolver(ClassReference.class);
+        if (resolverClass==null || !resolverClass.getName().equals("org.apache.tuscany.sca.contribution.java.impl.ClassLoaderModelResolver")) {
+            try {
+                Class<?> loaderResolverClass = Class.forName("org.apache.tuscany.sca.contribution.java.impl.ClassLoaderModelResolver", true, ContributionContentProcessor.class.getClassLoader());
+                modelResolvers.addResolver(ClassReference.class, (Class<? extends ModelResolver>)loaderResolverClass);
+            } catch (ClassNotFoundException e) {
+            }
+        }
+    }
+}