Moving 1.x branches

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@835119 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 119 insertions, 0 deletions

diff --git a/sca-java-1.x/branches/sca-java-0.90/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptImplementationProvider.java b/sca-java-1.x/branches/sca-java-0.90/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptImplementationProvider.java
new file mode 100644
index 0000000000..b15247033b
--- /dev/null
+++ b/sca-java-1.x/branches/sca-java-0.90/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptImplementationProvider.java
@@ -0,0 +1,119 @@
+/*
+ * 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;
+
+import java.io.StringReader;
+
+import javax.script.Invocable;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
+import javax.script.ScriptException;
+
+import org.apache.tuscany.implementation.spi.PropertyValueObjectFactory;
+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.factory.ObjectCreationException;
+import org.apache.tuscany.sca.factory.ObjectFactory;
+import org.apache.tuscany.sca.implementation.script.engines.TuscanyJRubyScriptEngine;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
+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;
+
+/**
+ * Represents a Script implementation.
+ */
+public class ScriptImplementationProvider implements ImplementationProvider {
+
+    protected RuntimeComponent component;
+    protected ScriptImplementation implementation;
+    protected ScriptEngine scriptEngine;
+    protected PropertyValueObjectFactory propertyFactory;
+
+    public ScriptImplementationProvider(RuntimeComponent component, ScriptImplementation implementation, PropertyValueObjectFactory propertyFactory) {
+        this.component = component;
+        this.implementation = implementation;
+        this.propertyFactory = propertyFactory;
+    }
+
+    public Invoker createInvoker(RuntimeComponentService service, Operation operation) {
+        return new ScriptInvoker(this, operation.getName());
+    }
+
+    public Invoker createCallbackInvoker(Operation operation) {
+        return new ScriptInvoker(this, operation.getName());
+    }
+    
+    public void start() {
+        try {
+            scriptEngine = getScriptEngineByExtension(implementation.getScriptLanguage());
+            if (scriptEngine == null) {
+                throw new ObjectCreationException("no script engine found for language: " + implementation.getScriptLanguage());
+            }
+            if (!(scriptEngine instanceof Invocable)) {
+                throw new ObjectCreationException("script engine does not support Invocable: " + scriptEngine);
+            }
+            
+            for (Reference reference : implementation.getReferences()) {
+                scriptEngine.put(reference.getName(), createReferenceProxy(reference.getName(), component));
+            }
+
+            for (Property property : implementation.getProperties()) {
+                ObjectFactory<?> propertyValueFactory = propertyFactory.createValueFactory(property);
+                if ( propertyValueFactory != null) {
+                    scriptEngine.put(property.getName(), propertyValueFactory.getInstance());
+                }
+            }
+            
+            scriptEngine.eval(new StringReader(implementation.getScriptSrc()));
+
+        } catch (ScriptException e) {
+            throw new ObjectCreationException(e);
+        }
+    }
+    
+    public void stop() {
+    }
+
+    @SuppressWarnings("unchecked")
+    protected Object createReferenceProxy(String name, RuntimeComponent component) {
+        for (ComponentReference reference : component.getReferences()) {
+            if (reference.getName().equals(name)) {
+                Class iface = ((JavaInterface)reference.getInterfaceContract().getInterface()).getJavaClass();
+                return component.getService(iface, name);
+            }
+        }
+        throw new IllegalArgumentException("reference " + name + " not found on component: " + component);
+    }
+
+    /**
+     * Hack for now to work around a problem with the JRuby script engine
+     */
+    private ScriptEngine getScriptEngineByExtension(String scriptExtn) {
+        ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
+        if ("rb".equals(scriptExtn)) {
+            return new TuscanyJRubyScriptEngine();
+        } else {
+            return scriptEngineManager.getEngineByExtension(scriptExtn);
+        }
+    }
+}