1 files changed, 93 insertions, 0 deletions
diff --git a/tags/java/sca/2.0-M3-RC3a/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/DefaultDefinitionsProviderExtensionPoint.java b/tags/java/sca/2.0-M3-RC3a/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/DefaultDefinitionsProviderExtensionPoint.java
new file mode 100644
index 0000000000..b68a485e55
--- /dev/null
+++ b/tags/java/sca/2.0-M3-RC3a/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/DefaultDefinitionsProviderExtensionPoint.java
@@ -0,0 +1,93 @@
+/*
+ * 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.provider;
+
+import java.lang.reflect.Constructor;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+
+/**
+ * Concrete Implementation for the SCADefinitionsProviderExtensionPoint
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultDefinitionsProviderExtensionPoint implements
+    DefinitionsProviderExtensionPoint {
+
+    private ExtensionPointRegistry extensionPointRegistry = null;
+    
+    private boolean loaded;
+    private List<DefinitionsProvider> scaDefnsProviders = new ArrayList<DefinitionsProvider>();
+    
+    public DefaultDefinitionsProviderExtensionPoint(ExtensionPointRegistry extnPtReg) {
+        this.extensionPointRegistry = extnPtReg;
+    }
+
+    public void addDefinitionsProvider(DefinitionsProvider provider) {
+        scaDefnsProviders.add(provider);
+    }
+
+    public void removeDefinitionsProvider(DefinitionsProvider provider) {
+        scaDefnsProviders.remove(provider);
+    }
+
+    public List<DefinitionsProvider> getDefinitionsProviders() {
+        loadProviders();
+        return scaDefnsProviders;
+    }
+
+    private synchronized void loadProviders() {
+        if(loaded) {
+            return;
+        }
+        // Get the provider service declarations
+        Collection<ServiceDeclaration> defnProviderDecls;
+        DefinitionsProvider aProvider = null;
+        Class<?> providerClass = null;
+        Constructor<?> constructor = null;
+
+        try {
+            defnProviderDecls =
+                ServiceDiscovery.getInstance().getServiceDeclarations(DefinitionsProvider.class.getName());
+    
+            for (ServiceDeclaration aDefnProviderDecl : defnProviderDecls) {
+                providerClass = aDefnProviderDecl.loadClass();
+            
+                try {
+                    constructor = providerClass.getConstructor();
+                    aProvider = (DefinitionsProvider)constructor.newInstance();
+                } catch (NoSuchMethodException e1) {
+                        constructor = providerClass.getConstructor(ExtensionPointRegistry.class);
+                        aProvider = (DefinitionsProvider)constructor.newInstance(extensionPointRegistry);
+                } 
+                
+                scaDefnsProviders.add(aProvider);
+            }
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+        loaded = true;
+    }
+}