1 files changed, 145 insertions, 0 deletions
diff --git a/sandbox/ant/container.rhino/src/main/java/org/apache/tuscany/container/rhino/RhinoScriptInstanceFactory.java b/sandbox/ant/container.rhino/src/main/java/org/apache/tuscany/container/rhino/RhinoScriptInstanceFactory.java
new file mode 100644
index 0000000000..ea55669696
--- /dev/null
+++ b/sandbox/ant/container.rhino/src/main/java/org/apache/tuscany/container/rhino/RhinoScriptInstanceFactory.java
@@ -0,0 +1,145 @@
+/*
+ * 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.rhino;
+
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.tuscany.container.easy.EasyInstanceFactory;
+import org.mozilla.javascript.Context;
+import org.mozilla.javascript.ContextFactory;
+import org.mozilla.javascript.ImporterTopLevel;
+import org.mozilla.javascript.Script;
+import org.mozilla.javascript.Scriptable;
+
+/**
+ * A RhinoScript represents a compiled JavaScript script
+ */
+public class RhinoScriptInstanceFactory extends EasyInstanceFactory<RhinoScriptInstance> {
+
+    protected String scriptSource;
+
+    protected Scriptable scriptScope;
+
+    protected Map<String, Class> responseClasses;
+
+    private String className;
+
+    /*
+     * Enable dynamic scopes so a script can be used concurrently with a global shared scope and individual execution scopes. See
+     * http://www.mozilla.org/rhino/scopes.html
+     */
+    private static class MyFactory extends ContextFactory {
+        protected boolean hasFeature(Context cx, int featureIndex) {
+            if (featureIndex == Context.FEATURE_DYNAMIC_SCOPE) {
+                return true;
+            }
+            return super.hasFeature(cx, featureIndex);
+        }
+    }
+
+    static {
+        ContextFactory.initGlobal(new MyFactory());
+    }
+
+    public RhinoScriptInstanceFactory(String resourceName, String className, String scriptSource, ClassLoader classLoader) {
+        super(resourceName, classLoader);
+        this.className = className;
+        this.scriptSource = scriptSource;
+        this.responseClasses = new HashMap<String, Class>();
+        initScriptScope(resourceName, scriptSource, null, classLoader);
+    }
+
+    @Override
+    public RhinoScriptInstance createInstance(List<Class> services, Map<String, Object> context) {
+        // TODO services should really be on the constructor of this class, not on this method
+        // and the responseClasses done in the constructor/init
+        Scriptable instanceScope = createInstanceScope(context);
+        RhinoScriptInstance rsi = new RhinoScriptInstance(scriptScope, instanceScope, context, getResponseClasses(services));
+        return rsi;
+    }
+
+    /**
+     * Initialize the Rhino Scope for this script instance
+     */
+    public Scriptable createInstanceScope(Map<String, Object> context) {
+        Context cx = Context.enter();
+        try {
+
+            Scriptable instanceScope = cx.newObject(scriptScope);
+            instanceScope.setPrototype(scriptScope);
+            instanceScope.setParentScope(null);
+
+            addContexts(instanceScope, context);
+
+            return instanceScope;
+
+        } finally {
+            Context.exit();
+        }
+    }
+
+    /**
+     * Create a Rhino scope and compile the script into it
+     */
+    public void initScriptScope(String fileName, String scriptCode, Map context, ClassLoader cl) {
+        Context cx = Context.enter();
+        try {
+            if (cl != null) {
+                // TODO: broken with the way the tuscany launcher now uses class loaders
+                // cx.setApplicationClassLoader(cl);
+            }
+            this.scriptScope = new ImporterTopLevel(cx, true);
+            Script compiledScript = cx.compileString(scriptCode, fileName, 1, null);
+            compiledScript.exec(cx, scriptScope);
+            addContexts(scriptScope, context);
+
+        } finally {
+            Context.exit();
+        }
+    }
+
+    /**
+     * Add the context to the scope. This will make the objects available to a script by using the name it was added with.
+     */
+    protected void addContexts(Scriptable scope, Map contexts) {
+        if (contexts != null) {
+            for (Iterator i = contexts.keySet().iterator(); i.hasNext();) {
+                String name = (String) i.next();
+                Object value = contexts.get(name);
+                if (value != null) {
+                    scope.put(name, scope, Context.toObject(value, scope));
+                }
+            }
+        }
+    }
+
+    /**
+     * Set the Java type of a response value. JavaScript is dynamically typed so Rhino cannot always work out what the intended Java type of a
+     * response should be, for example should the statement "return 42" be a Java int, or Integer or Double etc. When Rhino can't determine the type
+     * it will default to returning a String, using this method enables overriding the Rhino default to use a specific Java type.
+     */
+    public void setResponseClass(String functionName, Class responseClasses) {
+        this.responseClasses.put(functionName, responseClasses);
+    }
+
+}