Move Tuscany from Incubator to top level.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@668359 13f79535-47bb-0310-9956-ffa450edef68

8 files changed, 654 insertions, 0 deletions

diff --git a/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonComponent.java b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonComponent.java
new file mode 100644
index 0000000000..4376c48b82
--- /dev/null
+++ b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonComponent.java
@@ -0,0 +1,113 @@
+/*
+ * 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.container.python;
+
+import static org.apache.tuscany.spi.idl.java.JavaIDLUtils.findMethod;
+
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.tuscany.spi.ObjectCreationException;
+import org.apache.tuscany.spi.component.CompositeComponent;
+import org.apache.tuscany.spi.component.ScopeContainer;
+import org.apache.tuscany.spi.component.TargetException;
+import org.apache.tuscany.spi.component.WorkContext;
+import org.apache.tuscany.spi.extension.AtomicComponentExtension;
+import org.apache.tuscany.spi.model.Operation;
+import org.apache.tuscany.spi.wire.InboundWire;
+import org.apache.tuscany.spi.wire.OutboundWire;
+import org.apache.tuscany.spi.wire.TargetInvoker;
+import org.apache.tuscany.spi.wire.WireService;
+
+/**
+ * A component implementation for the Python language.
+ */
+public class PythonComponent extends AtomicComponentExtension {
+
+    private final List<Class<?>> services;
+
+    private final Map<String, Object> properties;
+
+    private PythonScript rhinoScript;
+
+    public PythonComponent(String name, PythonScript rhinoScript, List<Class<?>> services, CompositeComponent parent, ScopeContainer scopeContainer,
+            WireService wireService, WorkContext workContext) {
+
+        super(name, parent, scopeContainer, wireService, workContext, null, 0);
+
+        this.rhinoScript = rhinoScript;
+        this.services = services;
+        this.scope = scopeContainer.getScope();
+        this.properties = new HashMap<String, Object>();
+    }
+
+    public Object createInstance() throws ObjectCreationException {
+
+        Map<String, Object> context = new HashMap<String, Object>(getProperties());
+
+        for (List<OutboundWire> referenceWires : getOutboundWires().values()) {
+            for (OutboundWire wire : referenceWires) {
+                Object wireProxy = wireService.createProxy(wire);
+                context.put(wire.getReferenceName(), wireProxy);
+            }
+        }
+
+        Object instance = rhinoScript.createInstance(context);
+
+        return instance;
+    }
+
+    public TargetInvoker createTargetInvoker(String serviceName, Operation operation) {
+        Method[] methods = operation.getServiceContract().getInterfaceClass().getMethods();
+        Method method = findMethod(operation, methods);
+        return new PythonInvoker(method, this);
+    }
+
+    // TODO: move all the following up to AtomicComponentExtension?
+
+    public List<Class<?>> getServiceInterfaces() {
+        return services;
+    }
+
+    public Map<String, Object> getProperties() {
+        return properties;
+    }
+
+    public Object getTargetInstance() throws TargetException {
+        return scopeContainer.getInstance(this);
+    }
+
+    public Object getServiceInstance() throws TargetException {
+        return getServiceInstance(null);
+    }
+
+    @SuppressWarnings("unchecked")
+    public Object getServiceInstance(String service) throws TargetException {
+        InboundWire wire = getInboundWire(service);
+        if (wire == null) {
+            TargetException e = new TargetException("ServiceDefinition not found"); // TODO better error message
+            e.setIdentifier(service);
+            throw e;
+        }
+        return wireService.createProxy(wire);
+    }
+
+}
diff --git a/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonComponentBuilder.java b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonComponentBuilder.java
new file mode 100644
index 0000000000..d460f77bc6
--- /dev/null
+++ b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonComponentBuilder.java
@@ -0,0 +1,74 @@
+/*
+ * 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.container.python;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import org.apache.tuscany.spi.builder.BuilderConfigException;
+import org.apache.tuscany.spi.component.Component;
+import org.apache.tuscany.spi.component.CompositeComponent;
+import org.apache.tuscany.spi.component.ScopeContainer;
+import org.apache.tuscany.spi.deployer.DeploymentContext;
+import org.apache.tuscany.spi.extension.ComponentBuilderExtension;
+import org.apache.tuscany.spi.model.ComponentDefinition;
+import org.apache.tuscany.spi.model.Scope;
+import org.apache.tuscany.spi.model.ServiceDefinition;
+
+/**
+ * Extension point for creating {@link PythonComponent}s from an assembly configuration
+ */
+public class PythonComponentBuilder extends ComponentBuilderExtension<PythonImplementation> {
+
+    public PythonComponentBuilder() {
+    }
+
+    protected Class<PythonImplementation> getImplementationType() {
+        return PythonImplementation.class;
+    }
+
+    @SuppressWarnings("unchecked")
+    public Component build(CompositeComponent parent, ComponentDefinition<PythonImplementation> componentDefinition,
+            DeploymentContext deploymentContext) throws BuilderConfigException {
+
+        String name = componentDefinition.getName();
+        PythonImplementation implementation = componentDefinition.getImplementation();
+        PythonComponentType componentType = implementation.getComponentType();
+
+        // get list of services provided by this component
+        Collection<ServiceDefinition> collection = componentType.getServices().values();
+        List<Class<?>> services = new ArrayList<Class<?>>(collection.size());
+        for (ServiceDefinition serviceDefinition : collection) {
+            services.add(serviceDefinition.getServiceContract().getInterfaceClass());
+        }
+
+        // TODO: have ComponentBuilderExtension pass ScopeContainer in on build method?
+        ScopeContainer scopeContainer;
+        Scope scope = componentType.getLifecycleScope();
+        if (Scope.MODULE == scope) {
+            scopeContainer = deploymentContext.getModuleScope();
+        } else {
+            scopeContainer = scopeRegistry.getScopeContainer(scope);
+        }
+
+        return new PythonComponent(name, implementation.getJythonScript(), services, parent, scopeContainer, wireService, workContext);
+    }
+
+}
diff --git a/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonComponentType.java b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonComponentType.java
new file mode 100644
index 0000000000..640ff297c5
--- /dev/null
+++ b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonComponentType.java
@@ -0,0 +1,61 @@
+/*
+ * 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.container.python;
+
+import org.apache.tuscany.spi.model.ComponentType;
+import org.apache.tuscany.spi.model.Property;
+import org.apache.tuscany.spi.model.ReferenceDefinition;
+import org.apache.tuscany.spi.model.Scope;
+import org.apache.tuscany.spi.model.ServiceDefinition;
+
+/**
+ * A componentType for Python components
+ * TODO: really need a generic componentType that supports scope and lifecycle 
+ */
+public class PythonComponentType extends ComponentType<ServiceDefinition, ReferenceDefinition, Property<?>> {
+
+    private Scope lifecycleScope = Scope.MODULE;
+
+    public PythonComponentType() {
+    }
+
+    @SuppressWarnings("unchecked")
+    public PythonComponentType(ComponentType ct) {
+        // TODO: A bit hacky but this is so the non-python .componentType XML side file can be used for now
+        setInitLevel(ct.getInitLevel());
+        for (Object property : ct.getProperties().values()) {
+            add((Property) property);
+        }
+        for (Object reference : ct.getReferences().values()) {
+            add((ReferenceDefinition) reference);
+        }
+        for (Object service : ct.getServices().values()) {
+            add((ServiceDefinition) service);
+        }
+    }
+
+    public Scope getLifecycleScope() {
+        return lifecycleScope;
+    }
+
+    public void setLifecycleScope(Scope lifecycleScope) {
+        this.lifecycleScope = lifecycleScope;
+    }
+
+}
diff --git a/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonComponentTypeLoader.java b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonComponentTypeLoader.java
new file mode 100644
index 0000000000..1f1456594e
--- /dev/null
+++ b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonComponentTypeLoader.java
@@ -0,0 +1,76 @@
+/*
+ * 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.container.python;
+
+import java.net.URL;
+
+import org.apache.tuscany.spi.component.CompositeComponent;
+import org.apache.tuscany.spi.deployer.DeploymentContext;
+import org.apache.tuscany.spi.extension.ComponentTypeLoaderExtension;
+import org.apache.tuscany.spi.loader.LoaderException;
+import org.apache.tuscany.spi.model.ComponentType;
+
+/**
+ * ComponentType loader for Python components
+ */
+public class PythonComponentTypeLoader extends ComponentTypeLoaderExtension<PythonImplementation> {
+
+    public PythonComponentTypeLoader() {
+    }
+
+    @Override
+    protected Class<PythonImplementation> getImplementationClass() {
+        return PythonImplementation.class;
+    }
+
+    protected String getResourceName(PythonImplementation implementation) {
+        return implementation.getJythonScript().getModuleName();
+    }
+
+    // TODO: must be possible to move all the following up in to ComponentTypeLoaderExtension
+
+    public void load(CompositeComponent parent, PythonImplementation implementation, DeploymentContext deploymentContext) throws LoaderException {
+        String sideFile = getSideFileName(implementation);
+        URL resource = implementation.getJythonScript().getClassLoader().getResource(sideFile);
+        PythonComponentType componentType;
+        if (resource == null) {
+            throw new IllegalArgumentException("missing .componentType side file: " + sideFile);
+            // TODO: or else implement intospection
+        } else {
+            componentType = loadFromSidefile(resource, deploymentContext);
+        }
+        implementation.setComponentType(componentType);
+    }
+
+    protected PythonComponentType loadFromSidefile(URL url, DeploymentContext deploymentContext) throws LoaderException {
+        ComponentType ct = loaderRegistry.load(null, url, ComponentType.class, deploymentContext);
+        PythonComponentType pythonComponentType = new PythonComponentType(ct);
+        return pythonComponentType;
+    }
+
+    protected String getSideFileName(PythonImplementation implementation) {
+        String baseName = getResourceName(implementation);
+        int lastDot = baseName.lastIndexOf('.');
+        if (lastDot != -1) {
+            baseName = baseName.substring(0, lastDot);
+        }
+        return baseName + ".componentType";
+    }
+
+}
diff --git a/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonImplementation.java b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonImplementation.java
new file mode 100644
index 0000000000..df35801e88
--- /dev/null
+++ b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonImplementation.java
@@ -0,0 +1,37 @@
+/*
+ * 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.container.python;
+
+import org.apache.tuscany.spi.model.AtomicImplementation;
+
+/**
+ * Model object for a Python implementation.
+ */
+public class PythonImplementation extends AtomicImplementation<PythonComponentType> {
+
+    private PythonScript pythonScript;
+
+    public PythonScript getJythonScript() {
+        return pythonScript;
+    }
+
+    public void setPythonScript(PythonScript pythonScript) {
+        this.pythonScript = pythonScript;
+    }
+}
diff --git a/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonImplementationLoader.java b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonImplementationLoader.java
new file mode 100644
index 0000000000..61a6cbd4b6
--- /dev/null
+++ b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonImplementationLoader.java
@@ -0,0 +1,123 @@
+/*
+ * 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.container.python;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.net.URL;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+
+import org.apache.tuscany.spi.annotation.Autowire;
+import org.apache.tuscany.spi.component.CompositeComponent;
+import org.apache.tuscany.spi.deployer.DeploymentContext;
+import org.apache.tuscany.spi.extension.LoaderExtension;
+import org.apache.tuscany.spi.loader.LoaderException;
+import org.apache.tuscany.spi.loader.LoaderRegistry;
+import org.apache.tuscany.spi.loader.LoaderUtil;
+import org.apache.tuscany.spi.loader.MissingResourceException;
+import org.osoa.sca.annotations.Constructor;
+
+/**
+ * Loader for handling python elements.
+ * 
+ * <py:implementation.python module="path/foo.py" class="myclass">
+ *  
+ */
+public class PythonImplementationLoader extends LoaderExtension<PythonImplementation> {
+
+    private static final QName IMPLEMENTATION_PYTHON = new QName("http://tuscany.apache.org/xmlns/python/1.0", "implementation.python");
+
+    @Constructor( { "registry" })
+    public PythonImplementationLoader(@Autowire LoaderRegistry registry) {
+        super(registry);
+    }
+
+    public QName getXMLType() {
+        return IMPLEMENTATION_PYTHON;
+    }
+
+    public PythonImplementation load(CompositeComponent parent, XMLStreamReader reader, DeploymentContext deploymentContext)
+            throws XMLStreamException, LoaderException {
+
+        String moduleName = reader.getAttributeValue(null, "module");
+        if (moduleName == null) {
+            throw new MissingResourceException("implementation element has no module attribute");
+        }
+
+        String className = reader.getAttributeValue(null, "class");
+
+        LoaderUtil.skipToEndElement(reader);
+
+        PythonImplementation implementation = new PythonImplementation();
+
+        ClassLoader cl = deploymentContext.getClassLoader();
+        String pythonSource = loadSource(cl, moduleName);
+
+        PythonScript pythonScript = new PythonScript(moduleName, className, pythonSource, cl);
+        implementation.setPythonScript(pythonScript);
+        
+        registry.loadComponentType(parent, implementation, deploymentContext);
+
+        Class iface = implementation.getComponentType().getServices().values().iterator().next().getServiceContract().getInterfaceClass();
+        // TODO:  service interfaces should be on PythonScript constructor but loadComponentType requires the script name to work out the sidefile name
+        pythonScript.setServiceInterface(iface);
+
+        return implementation;
+    }
+
+    protected String loadSource(ClassLoader cl, String resource) throws LoaderException {
+        URL url = cl.getResource(resource);
+        if (url == null) {
+            throw new MissingResourceException(resource);
+        }
+        InputStream is;
+        try {
+            is = url.openStream();
+        } catch (IOException e) {
+            MissingResourceException mre = new MissingResourceException(resource, e);
+            mre.setIdentifier(resource);
+            throw mre;
+        }
+        try {
+            Reader reader = new InputStreamReader(is, "UTF-8");
+            char[] buffer = new char[1024];
+            StringBuilder source = new StringBuilder();
+            int count;
+            while ((count = reader.read(buffer)) > 0) {
+                source.append(buffer, 0, count);
+            }
+            return source.toString();
+        } catch (IOException e) {
+            LoaderException le = new LoaderException(e);
+            le.setIdentifier(resource);
+            throw le;
+        } finally {
+            try {
+                is.close();
+            } catch (IOException e) {
+                // ignore
+            }
+        }
+    }
+}
diff --git a/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonInvoker.java b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonInvoker.java
new file mode 100644
index 0000000000..62f7a6c847
--- /dev/null
+++ b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonInvoker.java
@@ -0,0 +1,54 @@
+/*
+ * 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.container.python;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import org.apache.tuscany.spi.extension.TargetInvokerExtension;
+
+/**
+ * Dispatches to a PythonScript implementation instance
+ * 
+ * @version $$Rev$$ $$Date$$
+ */
+public class PythonInvoker extends TargetInvokerExtension {
+
+    private PythonComponent context;
+
+    private Method method;
+
+    public PythonInvoker(Method method, PythonComponent context) {
+        this.method = method;
+        this.context = context;
+    }
+
+    /**
+     * Invokes a function on a script instance
+     */
+    public Object invokeTarget(final Object payload) throws InvocationTargetException {
+        Object target = context.getTargetInstance();
+        try {
+            return method.invoke(target, (Object[]) payload);
+        } catch (Exception e) {
+            throw new InvocationTargetException(e);
+        }
+    }
+
+}
diff --git a/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonScript.java b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonScript.java
new file mode 100644
index 0000000000..1eab532582
--- /dev/null
+++ b/sandbox/ant/container.python/src/main/java/org/apache/tuscany/container/python/PythonScript.java
@@ -0,0 +1,116 @@
+/*
+ * 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.container.python;
+
+import java.util.Map;
+
+import org.python.core.Py;
+import org.python.core.PyObject;
+import org.python.core.PySystemState;
+import org.python.util.PythonInterpreter;
+
+/**
+ * JythonScript represents a compiled Jython script
+ */
+public class PythonScript {
+
+    protected String moduleName;
+
+    protected String className;
+
+    protected String script;
+
+    protected Class iface;
+
+    protected ClassLoader classLoader;
+
+    private PyObject pythonClass;
+
+    /**
+     * Create a new RhinoInvoker.
+     * 
+     * @param scriptName
+     *            the name of the script. Can be anything, only used in messages to identify the script
+     * @param script
+     *            the complete script
+     * @param context
+     *            name-value pairs that are added in to the scope where the script is compiled. May be null. The value objects are made available to
+     *            the script by using a variable with the name.
+     * @param classLoader
+     *            the ClassLoader Rhino should use to locate any user Java classes used in the script
+     */
+    public PythonScript(String moduleName, String className, String script, ClassLoader classLoader) {
+        this.moduleName = moduleName;
+        this.className = className;
+        this.script = script;
+        this.classLoader = classLoader;
+
+    }
+
+    private void initScript(String moduleName, String className, String script) {
+        PythonInterpreter interpreter = new PythonInterpreter();
+        PySystemState sys = Py.getSystemState();
+        PySystemState.add_package(iface.getPackage().getName(), null);
+        sys.setClassLoader(classLoader);
+        interpreter.exec(script);
+
+        pythonClass = interpreter.get(className);
+        if (pythonClass == null) {
+            throw new RuntimeException("No callable (class or function) " + "named " + className + " in " + moduleName);
+        }
+    }
+
+    /**
+     * Create a new invokeable instance of the script
+     * 
+     * @param context
+     *            objects to add to scope of the script instance
+     * @return a RhinoScriptInstance
+     */
+    public Object createInstance(Map<String, Object> context) {
+        initScript(moduleName, className, script);
+
+        PyObject instance = pythonClass.__call__();
+        Object o = instance.__tojava__(iface);
+        if (o == Py.NoConversion) {
+            throw new RuntimeException("The value from " + className + " must extend " + iface.getName());
+        }
+        return o;
+    }
+
+    public String getModuleName() {
+        return moduleName;
+    }
+
+    public String getClassName() {
+        return className;
+    }
+
+    public String getScript() {
+        return script;
+    }
+
+    public ClassLoader getClassLoader() {
+        return classLoader;
+    }
+
+    public void setServiceInterface(Class iface) {
+        this.iface = iface;
+    }
+}