Add BPEL document resolver to defer to namespace imports if document is not found in current contribution

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@746461 13f79535-47bb-0310-9956-ffa450edef68

2 files changed, 102 insertions, 0 deletions

diff --git a/branches/sca-java-1.x/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELDocumentModelResolver.java b/branches/sca-java-1.x/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELDocumentModelResolver.java
new file mode 100644
index 0000000000..2dd2cd304a
--- /dev/null
+++ b/branches/sca-java-1.x/modules/implementation-bpel/src/main/java/org/apache/tuscany/sca/implementation/bpel/xml/BPELDocumentModelResolver.java
@@ -0,0 +1,84 @@
+/*
+ * 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.implementation.bpel.xml;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Composite;
+import org.apache.tuscany.sca.contribution.Contribution;
+import org.apache.tuscany.sca.contribution.Import;
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.contribution.namespace.NamespaceImport;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.implementation.bpel.BPELProcessDefinition;
+
+/**
+ * A Model Resolver for BPEL process models.
+ *
+ * @version $Rev$ $Date$
+ */
+public class BPELDocumentModelResolver implements ModelResolver {
+
+    private Contribution contribution;
+    private Map<QName, BPELProcessDefinition> map = new HashMap<QName, BPELProcessDefinition>();
+    
+    public BPELDocumentModelResolver(Contribution contribution, ModelFactoryExtensionPoint modelFactories) {
+        this.contribution = contribution;
+    }
+
+    public void addModel(Object resolved) {
+        BPELProcessDefinition process = (BPELProcessDefinition)resolved;
+        map.put(process.getName(), process);
+    }
+    
+    public Object removeModel(Object resolved) {
+        return map.remove(((BPELProcessDefinition)resolved).getName());
+    }
+    
+    public <T> T resolveModel(Class<T> modelClass, T unresolved) {
+        
+        // Lookup a definition for the given namespace
+        QName qname = ((BPELProcessDefinition)unresolved).getName();
+        BPELProcessDefinition resolved = (BPELProcessDefinition) map.get(qname);
+        if (resolved != null) {
+            return modelClass.cast(resolved);
+        }
+        
+        // No definition found, delegate the resolution to the imports
+        for (Import import_ : this.contribution.getImports()) {
+            if (import_ instanceof NamespaceImport) {
+                NamespaceImport namespaceImport = (NamespaceImport)import_;
+                if (namespaceImport.getNamespace().equals(qname.getNamespaceURI())) {
+                    
+                    // Delegate the resolution to the import resolver
+                    resolved = namespaceImport.getModelResolver().resolveModel(BPELProcessDefinition.class, (BPELProcessDefinition)unresolved);
+                    if (!resolved.isUnresolved()) {
+                        return modelClass.cast(resolved);
+                    }
+                }
+            }
+        }
+        return (T)unresolved;
+    }
+    
+}
diff --git a/branches/sca-java-1.x/modules/implementation-bpel/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.resolver.ModelResolver b/branches/sca-java-1.x/modules/implementation-bpel/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.resolver.ModelResolver
new file mode 100644
index 0000000000..08930e29ff
--- /dev/null
+++ b/branches/sca-java-1.x/modules/implementation-bpel/src/main/resources/META-INF/services/org.apache.tuscany.sca.contribution.resolver.ModelResolver
@@ -0,0 +1,18 @@
+# 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. 

+

+org.apache.tuscany.sca.implementation.bpel.xml.BPELDocumentModelResolver;model=org.apache.tuscany.sca.implementation.bpel.BPELProcessDefinition