1 files changed, 174 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/implementation-script-runtime/src/main/java/org/apache/tuscany/sca/implementation/script/provider/ScriptImplementationProvider.java b/sca-java-2.x/tags/2.0.1-RC1/modules/implementation-script-runtime/src/main/java/org/apache/tuscany/sca/implementation/script/provider/ScriptImplementationProvider.java
new file mode 100644
index 0000000000..0938462c49
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/implementation-script-runtime/src/main/java/org/apache/tuscany/sca/implementation/script/provider/ScriptImplementationProvider.java
@@ -0,0 +1,174 @@
+/*
+ * 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.implementation.script.provider;
+
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+import javax.script.Invocable;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
+import javax.script.ScriptException;
+
+import org.apache.axiom.om.OMElement;
+import org.apache.bsf.xml.XMLHelper;
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.Property;
+import org.apache.tuscany.sca.assembly.Reference;
+import org.apache.tuscany.sca.assembly.Service;
+import org.apache.tuscany.sca.core.factory.ObjectCreationException;
+import org.apache.tuscany.sca.core.factory.ObjectFactory;
+import org.apache.tuscany.sca.implementation.script.ScriptImplementation;
+import org.apache.tuscany.sca.interfacedef.InterfaceContract;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
+import org.apache.tuscany.sca.interfacedef.wsdl.WSDLInterfaceContract;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.provider.ImplementationProvider;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+/**
+ * An ImplementationProvider for Script implementations.
+ *
+ * @version $Rev$ $Date$
+ */
+public class ScriptImplementationProvider implements ImplementationProvider {
+    
+    private RuntimeComponent component;
+    private ScriptImplementation implementation;
+    private ScriptPropertyFactory propertyFactory;
+    private ScriptEngine scriptEngine;
+    private XMLHelper xmlHelper;
+    
+    public ScriptImplementationProvider(RuntimeComponent component, ScriptImplementation implementation, ScriptPropertyFactory propertyFactory) {
+        this.component = component;
+        this.implementation = implementation;
+        this.propertyFactory = propertyFactory;
+
+        // Set the databinding and XMLHelper for WSDL interfaces
+        for (Service service : component.getServices()) {
+            InterfaceContract ic = service.getInterfaceContract();
+            if (ic instanceof WSDLInterfaceContract) {
+                ic.getInterface().resetDataBinding(OMElement.class.getName());
+                xmlHelper = XMLHelper.getArgHelper(scriptEngine);
+            }
+        }
+    }
+
+    public void start() {
+        try {
+            String language = implementation.getLanguage();
+            if (language == null) {
+                language = implementation.getScript();
+                language = language.substring(language.lastIndexOf('.') +1);
+            }
+            scriptEngine = scriptEngine(language);
+            if (scriptEngine == null) {
+                throw new ObjectCreationException("no script engine found for language: " + implementation.getLanguage());
+            }
+            if (!(scriptEngine instanceof Invocable)) {
+                throw new ObjectCreationException("script engine does not support Invocable: " + scriptEngine);
+            }
+            
+            for (Reference reference : implementation.getReferences()) {
+                scriptEngine.put(reference.getName(), getProxy(reference.getName()));
+            }
+
+            for (Property property : implementation.getProperties()) {
+                ObjectFactory<?> valueFactory = propertyFactory.createValueFactory(property);
+                if (valueFactory != null) {
+                    scriptEngine.put(property.getName(), valueFactory.getInstance());
+                }
+            }
+
+            URL url = new URL(implementation.getLocation());
+            InputStreamReader reader = new InputStreamReader(url.openStream());
+            scriptEngine.eval(reader);
+            reader.close();
+
+        } catch (IOException e) {
+            throw new IllegalArgumentException(e);
+        } catch (ScriptException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    public void stop() {
+    }
+
+    public boolean supportsOneWayInvocation() {
+        return false;
+    }
+
+    public Invoker createInvoker(RuntimeComponentService service, Operation operation) {
+        return new ScriptInvoker(scriptEngine, xmlHelper, operation);
+    }
+
+    private Object getProxy(String name) {
+        for (ComponentReference reference : component.getReferences()) {
+            if (reference.getName().equals(name)) {
+                Class<?> iface = ((JavaInterface)reference.getInterfaceContract().getInterface()).getJavaClass();
+                return component.getComponentContext().getService(iface, name);
+            }
+        }
+        throw new IllegalArgumentException("reference " + name + " not found on component: " + component);
+    }
+
+    /**
+     * Returns the script engine for the given language.
+     * 
+     * @param language
+     * @return
+     */
+    private ScriptEngine scriptEngine(String language) {
+        if ("rb".equals(language)) {
+
+            // Hack for now to work around a problem with the JRuby script engine
+            // return new TuscanyJRubyScriptEngine();
+        } else {
+            if ("py".equals(language)) {
+                pythonCachedir();
+            }
+        }
+        // Allow privileged access to run access classes. Requires RuntimePermission
+        // for accessClassInPackage.sun.misc.
+        ScriptEngineManager scriptEngineManager =
+            AccessController.doPrivileged(new PrivilegedAction<ScriptEngineManager>() {
+                public ScriptEngineManager run() {
+                    return new ScriptEngineManager();
+                }
+            });
+        return scriptEngineManager.getEngineByExtension(language);
+    }
+
+    /**
+     * If the Python home isn't set then let Tuscany suppress messages other than errors
+     * See TUSCANY-1950
+     */
+    private static void pythonCachedir() {
+        if (System.getProperty("python.home") == null) {
+          System.setProperty("python.verbose", "error");
+        }
+    }
+}