From b771a05508db61cb1748d2fed0eb92daf173ff92 Mon Sep 17 00:00:00 2001
From: rsivaram <rsivaram@13f79535-47bb-0310-9956-ffa450edef68>
Date: Thu, 16 Oct 2008 11:51:49 +0000
Subject: Copy modules for event prototype

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@705212 13f79535-47bb-0310-9956-ffa450edef68
---
 .../resolver/DefaultDelegatingModelResolver.java   | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 sandbox/event/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/resolver/DefaultDelegatingModelResolver.java

(limited to 'sandbox/event/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/resolver/DefaultDelegatingModelResolver.java')

diff --git a/sandbox/event/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/resolver/DefaultDelegatingModelResolver.java b/sandbox/event/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/resolver/DefaultDelegatingModelResolver.java
new file mode 100644
index 0000000000..13c622adf0
--- /dev/null
+++ b/sandbox/event/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/resolver/DefaultDelegatingModelResolver.java
@@ -0,0 +1,68 @@
+/*
+ * 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.resolver;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.Base;
+
+/**
+ * A model resolver implementation that delegates to a list of model resolvers.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultDelegatingModelResolver implements ModelResolver {
+    
+    private List<ModelResolver> resolvers;
+    
+    public DefaultDelegatingModelResolver(List<ModelResolver> resolvers) {
+        this.resolvers = resolvers;
+    }
+
+    public void addModel(Object resolved) {
+        throw new IllegalStateException();
+    }
+
+    public Object removeModel(Object resolved) {
+        throw new IllegalStateException();
+    }
+
+    public <T> T resolveModel(Class<T> modelClass, T unresolved) {
+        
+        //TODO optimize and cache results of the resolution later
+        
+        // Go over all resolvers
+        for (ModelResolver resolver: resolvers) {
+            
+            Object resolved = resolver.resolveModel(modelClass, unresolved);
+            
+            // Return the resolved model object
+            if (resolved instanceof Base) {
+                if (!((Base)resolved).isUnresolved()) {
+                    return modelClass.cast(resolved);
+                }
+            }
+        }
+
+        // Model object was not resolved
+        return unresolved;
+    }
+
+}
-- 
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