1 files changed, 86 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-stable-20060304/sca/container.java/src/main/java/org/apache/tuscany/container/java/invocation/ScopedJavaComponentInvoker.java b/sca-java-1.x/tags/java-stable-20060304/sca/container.java/src/main/java/org/apache/tuscany/container/java/invocation/ScopedJavaComponentInvoker.java
new file mode 100644
index 0000000000..4d69ba51f5
--- /dev/null
+++ b/sca-java-1.x/tags/java-stable-20060304/sca/container.java/src/main/java/org/apache/tuscany/container/java/invocation/ScopedJavaComponentInvoker.java
@@ -0,0 +1,86 @@
+/**
+ *
+ *  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.container.java.invocation;
+
+import java.lang.reflect.Method;
+
+import org.apache.tuscany.core.context.QualifiedName;
+import org.apache.tuscany.core.context.ScopeContext;
+import org.apache.tuscany.core.context.TargetException;
+
+/**
+ * Uses a scope container to resolve an implementation instance based on the current thread context
+ * 
+ * @version $Rev$ $Date$
+ */
+public class ScopedJavaComponentInvoker extends AbstractJavaComponentInvoker {
+
+    private ScopeContext container;
+
+    private QualifiedName name;
+
+    private Object target;
+
+    public boolean cacheable;
+
+    public ScopedJavaComponentInvoker(QualifiedName serviceName, Method operation, ScopeContext container) {
+        super(operation);
+        assert (serviceName != null) : "No service name specified";
+        assert (container != null) : "No scope container specified";
+        name = serviceName;
+        this.container = container;
+    }
+
+    /**
+     * Returns whether the target is cacheable.
+     */
+    public boolean isCacheable() {
+        return cacheable;
+    }
+
+    /**
+     * Sets whether the target service instance may be cached by the invoker. This is a possible optimization when a
+     * wire is configured for a "down-scope" reference, i.e. a reference from a source of a shorter lifetime to a source
+     * of greater lifetime.
+     */
+    public void setCacheable(boolean val) {
+        cacheable = val;
+    }
+
+    /**
+     * Resolves the target service instance or returns a cached one
+     */
+    protected Object getInstance() throws TargetException {
+        if (!cacheable) {
+            return container.getInstance(name);
+        } else {
+            if (target == null) {
+                target = container.getInstance(name);
+            }
+            return target;
+        }
+    }
+
+    public Object clone() {
+        ScopedJavaComponentInvoker invoker = (ScopedJavaComponentInvoker) super.clone();
+        invoker.target = null;
+        invoker.cacheable = this.cacheable;
+        invoker.container = this.container;
+        invoker.name = this.name;
+        return invoker;
+    }
+}