1 files changed, 82 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/system/context/SystemEntryPointContext.java b/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/system/context/SystemEntryPointContext.java
new file mode 100644
index 0000000000..107e676c47
--- /dev/null
+++ b/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/system/context/SystemEntryPointContext.java
@@ -0,0 +1,82 @@
+/**
+ * 
+ * Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
+ * 
+ * Licensed 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.core.system.context;
+
+import org.apache.tuscany.core.builder.ContextResolver;
+import org.apache.tuscany.core.context.impl.AbstractContext;
+import org.apache.tuscany.core.context.Context;
+import org.apache.tuscany.core.context.CoreRuntimeException;
+import org.apache.tuscany.core.context.EntryPointContext;
+import org.apache.tuscany.core.context.QualifiedName;
+import org.apache.tuscany.core.context.TargetException;
+
+/**
+ * Manages an entry point into a system module. System entry points cache a direct (i.e. non-proxied) reference to a
+ * component instance.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class SystemEntryPointContext extends AbstractContext implements EntryPointContext {
+
+    // a reference to the component's implementation instance exposed by the entry point
+    private Object cachedInstance;
+
+    private ContextResolver resolver;
+    
+    private QualifiedName targetName;
+
+    private  Class serviceInterface;
+
+    public SystemEntryPointContext(String name, String targetName,  Class serviceInterface, ContextResolver resolver) {
+        super(name);
+        assert (resolver != null) : "Context resolver was null";
+        assert (targetName != null) : "Target name was null";
+        assert (serviceInterface != null) : "Service interface is null";
+        this.serviceInterface = serviceInterface;
+        this.resolver = resolver;
+        this.targetName = new QualifiedName(targetName);
+    }
+
+    public Object getInstance(QualifiedName qName) throws TargetException {
+        try {
+            if (cachedInstance == null) {
+                Context ctx = resolver.getCurrentContext().getContext(targetName.getPartName());
+                if (ctx == null){
+                    return null;
+                }
+                cachedInstance = ctx.getInstance(targetName);
+            }
+            return cachedInstance;
+        } catch (TargetException e) {
+            e.addContextName(getName());
+            throw e;
+        }
+    }
+
+    public void start() throws CoreRuntimeException {
+        lifecycleState = RUNNING;
+    }
+
+    public void stop() throws CoreRuntimeException {
+        lifecycleState = STOPPED;
+    }
+
+    public Object getHandler() throws TargetException {
+        return getInstance(null);
+    }
+
+    public Class getServiceInterface() {
+        return serviceInterface;
+    }
+}