1 files changed, 98 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportExportListener.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportExportListener.java
new file mode 100644
index 0000000000..7ea09a47c7
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+++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/contribution-namespace/src/main/java/org/apache/tuscany/sca/contribution/namespace/impl/NamespaceImportExportListener.java
@@ -0,0 +1,98 @@
+/*
+ * 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.namespace.impl;
+
+import org.apache.tuscany.sca.contribution.Contribution;
+import org.apache.tuscany.sca.contribution.Export;
+import org.apache.tuscany.sca.contribution.Import;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceExport;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceImport;
+import org.apache.tuscany.sca.contribution.resolver.DefaultImportAllModelResolver;
+import org.apache.tuscany.sca.contribution.service.ContributionListener;
+import org.apache.tuscany.sca.contribution.service.ContributionRepository;
+
+/**
+ * Namespace Import/Export contribution listener
+ * The listener would process all import/export from a given contribution 
+ * and initialize the model resolvers properly
+ * 
+ * @version $Rev$ $Date$
+ */
+public class NamespaceImportExportListener implements ContributionListener {
+
+    /**
+     * Initialize the import/export model resolvers
+     * Export model resolvers are same as Contribution model resolver
+     * Import model resolvers are matched to a specific contribution if a location URI is specified, 
+     *    otherwise it try to resolve against all the other contributions
+     * Also set the exporting contributions used by contribution ClassLoaders to 
+     * match import/export for class loading.
+     */    
+    public void contributionAdded(ContributionRepository repository, Contribution contribution) {
+        // Initialize the contribution exports
+        for (Export export: contribution.getExports()) {
+            export.setModelResolver(contribution.getModelResolver());
+        }
+        
+        // Initialize the contribution imports
+        for (Import import_: contribution.getImports()) {
+            boolean initialized = false;
+
+            if (import_ instanceof NamespaceImport) {
+                NamespaceImport namespaceImport = (NamespaceImport)import_;
+                
+                // Find a matching contribution
+                if (namespaceImport.getLocation() != null) {
+                    Contribution targetContribution = repository.getContribution(namespaceImport.getLocation());
+                    if (targetContribution != null) {
+                    
+                        // Find a matching contribution export
+                        for (Export export: targetContribution.getExports()) {
+                            if (export instanceof NamespaceExport) {
+                                NamespaceExport namespaceExport = (NamespaceExport)export;
+                                if (namespaceImport.getNamespace().equals(namespaceExport.getNamespace())) {
+                                    namespaceImport.setModelResolver(namespaceExport.getModelResolver());
+                                    initialized = true;
+                                    break;
+                                }
+                            }
+                        }
+                    }
+                } 
+                
+                //if no location was specified, try to resolve with any contribution            
+                if( !initialized ) {
+                    // Use a resolver that will consider all contributions
+                    import_.setModelResolver(new DefaultImportAllModelResolver(import_, repository.getContributions()));
+                }
+            } 
+        }
+
+    }
+
+    public void contributionRemoved(ContributionRepository repository, Contribution contribution) {
+
+    }
+
+    public void contributionUpdated(ContributionRepository repository, Contribution oldContribution, Contribution contribution) {
+
+    }
+
+}