1 files changed, 138 insertions, 0 deletions
diff --git a/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/component/SystemSingletonAtomicComponent.java b/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/component/SystemSingletonAtomicComponent.java
new file mode 100644
index 0000000000..872853506e
--- /dev/null
+++ b/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/component/SystemSingletonAtomicComponent.java
@@ -0,0 +1,138 @@
+/*
+ * 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.core.component;
+
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.core.injection.SingletonObjectFactory;
+import org.apache.tuscany.spi.ObjectCreationException;
+import org.apache.tuscany.spi.ObjectFactory;
+import org.apache.tuscany.spi.component.AtomicComponent;
+import org.apache.tuscany.spi.component.InstanceWrapper;
+import org.apache.tuscany.spi.component.TargetInvokerCreationException;
+import org.apache.tuscany.spi.component.TargetResolutionException;
+import org.apache.tuscany.spi.extension.AbstractComponentExtension;
+import org.apache.tuscany.spi.idl.java.JavaServiceContract;
+import org.apache.tuscany.spi.model.Operation;
+import org.apache.tuscany.spi.model.Scope;
+import org.apache.tuscany.spi.model.ServiceContract;
+import org.apache.tuscany.spi.model.physical.PhysicalOperationDefinition;
+import org.apache.tuscany.spi.wire.TargetInvoker;
+import org.apache.tuscany.spi.wire.Wire;
+
+/**
+ * An {@link org.apache.tuscany.spi.component.AtomicComponent} used when registering objects directly into a composite
+ *
+ * @version $$Rev$$ $$Date$$
+ */
+public class SystemSingletonAtomicComponent<S, T extends S> extends AbstractComponentExtension
+    implements AtomicComponent<T> {
+    private T instance;
+    private List<ServiceContract> serviceContracts = new ArrayList<ServiceContract>();
+
+    public SystemSingletonAtomicComponent(URI name, JavaServiceContract<S> contract, T instance) {
+        super(name);
+        this.instance = instance;
+        this.serviceContracts.add(contract);
+    }
+
+    public SystemSingletonAtomicComponent(URI name, List<JavaServiceContract<?>> services, T instance) {
+        super(name);
+        this.instance = instance;
+        for (ServiceContract<?> contract : services) {
+            serviceContracts.add(contract);
+        }
+    }
+
+    public Scope getScope() {
+        return Scope.COMPOSITE;
+    }
+
+    public boolean isEagerInit() {
+        return false;
+    }
+
+    public int getInitLevel() {
+        return 0;
+    }
+
+    public long getMaxIdleTime() {
+        return -1;
+    }
+
+    public long getMaxAge() {
+        return -1;
+    }
+
+    public T getTargetInstance() throws TargetResolutionException {
+        return instance;
+    }
+
+    public Object createInstance() throws ObjectCreationException {
+        throw new UnsupportedOperationException();
+    }
+
+    public void removeInstance() {
+        throw new UnsupportedOperationException();
+    }
+
+    public InstanceWrapper<T> createInstanceWrapper() throws ObjectCreationException {
+        throw new UnsupportedOperationException();
+    }
+
+    public ObjectFactory<T> createObjectFactory() {
+        return new SingletonObjectFactory<T>(instance);
+    }
+
+    public boolean isOptimizable() {
+        return true;
+    }
+
+    public void attachWire(Wire wire) {
+        throw new UnsupportedOperationException();
+    }
+
+    public void attachWires(List<Wire> wires) {
+        throw new UnsupportedOperationException();
+    }
+
+    public List<Wire> getWires(String name) {
+        throw new UnsupportedOperationException();
+    }
+
+    public void attachCallbackWire(Wire wire) {
+        throw new UnsupportedOperationException();
+    }
+
+    public TargetInvoker createTargetInvoker(String targetName, Operation operation) {
+        return null;
+    }
+
+    public TargetInvoker createTargetInvoker(String targetName, PhysicalOperationDefinition operation)
+        throws TargetInvokerCreationException {
+        return null;
+    }
+
+    public List<ServiceContract> getServiceContracts() {
+        return serviceContracts;
+    }
+
+}