Moving 1.x trunk

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@835700 13f79535-47bb-0310-9956-ffa450edef68

5 files changed, 1101 insertions, 0 deletions

diff --git a/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptImplementation.java b/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptImplementation.java
new file mode 100644
index 0000000000..87820c18ed
--- /dev/null
+++ b/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptImplementation.java
@@ -0,0 +1,99 @@
+/*
+ * 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.net.MalformedURLException;
+import java.net.URL;
+
+import org.apache.tuscany.sca.contribution.Artifact;
+import org.apache.tuscany.sca.contribution.ContributionFactory;
+import org.apache.tuscany.sca.contribution.DefaultContributionFactory;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.extension.helper.utils.ResourceHelper;
+
+/**
+ * Represents a Script implementation.
+ *
+ * @version $Rev$ $Date$
+ */
+public class ScriptImplementation {
+
+    protected String scriptName;
+    protected URL scriptURL;
+    protected String scriptSrc;
+    protected String scriptLanguage;
+
+    public String getScript() {
+        return scriptName;
+    }
+
+    public void setScript(String scriptName) {
+        this.scriptName = scriptName;
+    }
+
+    public void setLanguage(String language) {
+        this.scriptLanguage = language;
+    }
+
+    public void setElementText(String elementText) {
+        scriptSrc = elementText;
+    }
+
+    public String getScriptLanguage() {
+        if (scriptLanguage == null || scriptLanguage.length() < 1) {
+            int i = scriptName.lastIndexOf('.');
+            if (i > 0) {
+                scriptLanguage = scriptName.substring(i + 1);
+            }
+        }
+        return scriptLanguage;
+    }
+
+    public String getScriptSrc() {
+        if (scriptSrc == null) {
+            if (scriptName == null) {
+                throw new IllegalArgumentException("script name is null and no inline source used");
+            }
+            if (scriptURL == null) {
+                throw new RuntimeException("No script: " + scriptName);
+            }
+
+            scriptSrc = ResourceHelper.readResource(scriptURL);
+        }
+        return scriptSrc;
+    }
+    
+    public void resolve(ModelResolver resolver) {
+    	
+    	if (scriptName != null) {
+    	    //FIXME The contribution factory should be injected
+    	    ContributionFactory contributionFactory = new DefaultContributionFactory();
+            Artifact artifact = contributionFactory.createArtifact();
+            artifact.setURI(scriptName);
+            artifact = resolver.resolveModel(Artifact.class, artifact);
+            if (artifact.getLocation() != null) {
+                try {
+                    scriptURL = new URL(artifact.getLocation());
+                } catch (MalformedURLException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+    	}
+    }
+}
diff --git a/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptImplementationActivator.java b/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptImplementationActivator.java
new file mode 100644
index 0000000000..a7c4b9074f
--- /dev/null
+++ b/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptImplementationActivator.java
@@ -0,0 +1,49 @@
+/*
+ * 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 org.apache.tuscany.sca.assembly.ComponentType;
+import org.apache.tuscany.sca.extension.helper.ImplementationActivator;
+import org.apache.tuscany.sca.extension.helper.InvokerFactory;
+import org.apache.tuscany.sca.extension.helper.utils.PropertyValueObjectFactory;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ *
+ * @version $Rev$ $Date$
+ */
+public class ScriptImplementationActivator implements ImplementationActivator<ScriptImplementation> {
+
+    // TODO: seems wrong to need PropertyValueObjectFactory, could it be on Property somehow? 
+    protected PropertyValueObjectFactory propertyFactory;
+
+    public ScriptImplementationActivator(PropertyValueObjectFactory propertyFactory) {
+        this.propertyFactory = propertyFactory;
+    }
+
+    public Class<ScriptImplementation> getImplementationClass() {
+        return ScriptImplementation.class;
+    }
+
+    public InvokerFactory createInvokerFactory(RuntimeComponent rc, ComponentType ct, ScriptImplementation implementation) {
+        return new ScriptInvokerFactory(rc, ct, implementation, propertyFactory);
+    }
+
+}
diff --git a/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptInvoker.java b/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptInvoker.java
new file mode 100644
index 0000000000..2ccb414be8
--- /dev/null
+++ b/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptInvoker.java
@@ -0,0 +1,84 @@
+/*
+ * 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 javax.script.Invocable;
+import javax.script.ScriptEngine;
+import javax.script.ScriptException;
+
+import org.apache.axiom.om.OMElement;
+import org.apache.bsf.xml.XMLHelper;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+
+/**
+ * Perform the actual script invocation
+ *
+ * @version $Rev$ $Date$
+ */
+public class ScriptInvoker implements Invoker {
+
+    protected ScriptEngine scriptEngine;
+    protected XMLHelper xmlHelper;
+    protected Operation operation;
+
+    public ScriptInvoker(ScriptEngine scriptEngine, XMLHelper xmlHelper, Operation operation) {
+        this.scriptEngine = scriptEngine;
+        this.xmlHelper = xmlHelper;
+        this.operation = operation;
+    }
+
+    protected Object doInvoke(Object[] objects, Operation op) throws ScriptException {
+        if (xmlHelper != null) {
+            objects[0] = xmlHelper.toScriptXML((OMElement)objects[0]);
+        }
+
+        Operation oper = operation;  // static setting
+        if (oper.getName() == null) {  // if no static setting
+            oper = op;  // use dynamic setting
+        }
+        Object response;
+        try {
+            response = ((Invocable)scriptEngine).invokeFunction(oper.getName(), objects);
+        } catch (ScriptException e) {
+            throw e;
+        } catch (Exception e) {
+            throw new ScriptException(e);
+        }
+
+        if (xmlHelper != null) {
+            response = xmlHelper.toOMElement(response);
+        }
+
+        return response;
+    }
+
+    public Message invoke(Message msg) {
+        try {
+            Object resp = doInvoke((Object[])msg.getBody(), msg.getOperation());
+            msg.setBody(resp);
+        } catch (ScriptException e) {
+            msg.setFaultBody(e.getCause());
+        }
+        return msg;
+    }
+
+}
diff --git a/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptInvokerFactory.java b/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptInvokerFactory.java
new file mode 100644
index 0000000000..e019129554
--- /dev/null
+++ b/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/ScriptInvokerFactory.java
@@ -0,0 +1,172 @@
+/*
+ * 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 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.ComponentType;
+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.extension.helper.InvokerFactory;
+import org.apache.tuscany.sca.extension.helper.utils.PropertyValueObjectFactory;
+import org.apache.tuscany.sca.implementation.script.engines.TuscanyJRubyScriptEngine;
+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.invocation.Invoker;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ *
+ * @version $Rev$ $Date$
+ */
+public class ScriptInvokerFactory implements InvokerFactory {
+
+    protected ScriptEngine scriptEngine;
+    protected XMLHelper xmlHelper;
+    
+    protected RuntimeComponent rc; 
+    protected ComponentType ct; 
+    protected ScriptImplementation implementation;
+    protected PropertyValueObjectFactory propertyFactory;
+
+    
+    /**
+     * @param rc
+     * @param ct
+     * @param implementation
+     * @param propertyFactory
+     */
+    public ScriptInvokerFactory(RuntimeComponent rc,
+                                ComponentType ct,
+                                ScriptImplementation implementation,
+                                PropertyValueObjectFactory propertyFactory) {
+        super();
+        this.rc = rc;
+        this.ct = ct;
+        this.implementation = implementation;
+        this.propertyFactory = propertyFactory;
+    }
+
+    public Invoker createInvoker(Operation operation) {
+        init(rc, ct, implementation, propertyFactory);
+        return new ScriptInvoker(scriptEngine, xmlHelper, operation);
+    }
+    
+    protected synchronized void init(RuntimeComponent rc, ComponentType ct, ScriptImplementation implementation, PropertyValueObjectFactory propertyFactory) {
+        if(scriptEngine!=null) {
+            return;
+        }
+        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 : ct.getReferences()) {
+                scriptEngine.put(reference.getName(), createReferenceProxy(reference.getName(), rc));
+            }
+
+            for (Property property : ct.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);
+        }
+
+        // set the databinding and XMLHelper for WSDL interfaces
+        for (Service service : rc.getServices()) {
+            InterfaceContract ic = service.getInterfaceContract();
+            if ("org.apache.tuscany.sca.interfacedef.wsdl.WSDLInterfaceContract".equals(ic.getClass())) {
+                // Set to use the Axiom data binding
+                ic.getInterface().resetDataBinding(OMElement.class.getName());
+                xmlHelper = XMLHelper.getArgHelper(scriptEngine);
+            }
+        }
+    }
+
+    /**
+     * TODO: RuntimeComponent should provide a method like this
+     */
+    @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.getComponentContext().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
+     */
+    protected ScriptEngine getScriptEngineByExtension(String scriptExtn) {
+        if ("rb".equals(scriptExtn)) {
+            return new TuscanyJRubyScriptEngine();
+        } else {
+            if ("py".equals(scriptExtn)) {
+                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(scriptExtn);
+        }
+    }
+
+    /**
+     * If the Python home isn't set then let Tuscany suppress messages other than errors
+     * See TUSCANY-1950
+     */
+    protected void pythonCachedir() {
+            if (System.getProperty("python.home") == null) {
+              System.setProperty("python.verbose", "error");
+            }
+    }
+}
diff --git a/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/engines/TuscanyJRubyScriptEngine.java b/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/engines/TuscanyJRubyScriptEngine.java
new file mode 100644
index 0000000000..324246c32b
--- /dev/null
+++ b/sca-java-1.x/trunk/modules/implementation-script/src/main/java/org/apache/tuscany/sca/implementation/script/engines/TuscanyJRubyScriptEngine.java
@@ -0,0 +1,697 @@
+/*

+* Copyright (c) 2006, Sun Microsystems, Inc.

+* All rights reserved.

+* 

+* Redistribution and use in source and binary forms, with or without 

+* modification, are permitted provided that the following conditions are met:

+* 

+*  - Redistributions of source code must retain the above copyright notice, this 

+*    list of conditions and the following disclaimer.

+* 

+*  - Redistributions in binary form must reproduce the above copyright notice, 

+*    this list of conditions and the following disclaimer in the documentation 

+*    and/or other materials provided with the distribution.

+* 

+*  - Neither the name of the Sun Microsystems, Inc. nor the names of 

+*    contributors may be used to endorse or promote products derived from this 

+*    software without specific prior written permission.

+* 

+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 

+* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED 

+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 

+* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 

+* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 

+* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY 

+* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 

+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 

+* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 

+* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 

+* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 

+* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 

+* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 

+* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 

+* DAMAGE. 

+*/

+package org.apache.tuscany.sca.implementation.script.engines;

+

+import java.io.File;

+import java.io.FileInputStream;

+import java.io.FileNotFoundException;

+import java.io.IOException;

+import java.io.InputStream;

+import java.io.OutputStream;

+import java.io.PrintStream;

+import java.io.Reader;

+import java.io.StringWriter;

+import java.io.UnsupportedEncodingException;

+import java.io.Writer;

+import java.lang.reflect.InvocationHandler;

+import java.lang.reflect.Method;

+import java.lang.reflect.Proxy;

+import java.nio.ByteBuffer;

+import java.nio.CharBuffer;

+import java.nio.charset.Charset;

+import java.nio.charset.CharsetDecoder;

+import java.nio.charset.CoderResult;

+import java.nio.charset.CodingErrorAction;

+import java.security.AccessController;

+import java.security.PrivilegedAction;

+import java.util.Arrays;

+import java.util.Collections;

+import java.util.HashSet;

+import java.util.Iterator;

+import java.util.List;

+import java.util.Set;

+

+import javax.script.AbstractScriptEngine;

+import javax.script.Bindings;

+import javax.script.Compilable;

+import javax.script.CompiledScript;

+import javax.script.Invocable;

+import javax.script.ScriptContext;

+import javax.script.ScriptEngine;

+import javax.script.ScriptEngineFactory;

+import javax.script.ScriptException;

+import javax.script.SimpleBindings;

+

+import org.jruby.Ruby;

+import org.jruby.RubyException;

+import org.jruby.RubyIO;

+import org.jruby.RubyObject;

+import org.jruby.ast.Node;

+import org.jruby.exceptions.RaiseException;

+import org.jruby.internal.runtime.GlobalVariable;

+import org.jruby.internal.runtime.GlobalVariables;

+import org.jruby.internal.runtime.ReadonlyAccessor;

+import org.jruby.internal.runtime.ValueAccessor;

+import org.jruby.javasupport.Java;

+import org.jruby.javasupport.JavaEmbedUtils;

+import org.jruby.javasupport.JavaObject;

+import org.jruby.javasupport.JavaUtil;

+import org.jruby.runtime.Block;

+import org.jruby.runtime.IAccessor;

+import org.jruby.runtime.builtin.IRubyObject;

+import org.jruby.util.KCode;

+

+import com.sun.script.jruby.JRubyScriptEngineFactory;

+

+/**

+ * This class is a copy of the class com.sun.script.ruby.JRubyScriptEngine with some minor modifications

+ * to work around problems with Tuscany setting SCA properties and references as global variable in JRuby

+ * Should only need it temporarily till a new BSF release fixes it.

+ *

+ * @version $Rev$ $Date$

+ */

+@SuppressWarnings("unchecked")

+public class TuscanyJRubyScriptEngine extends AbstractScriptEngine 

+        implements Compilable, Invocable { 

+

+    // my factory, may be null

+    private ScriptEngineFactory factory;

+    private Ruby runtime;

+   

+    public TuscanyJRubyScriptEngine() {

+        // Allow privileged access to ready properties. Requires PropertyPermission in security

+        // policy.

+        String rubyPath = AccessController.doPrivileged(new PrivilegedAction<String>() {

+            public String run() {

+                return System.getProperty("com.sun.script.jruby.loadpath");

+            }

+        });

+        init(rubyPath);

+    }

+

+    public TuscanyJRubyScriptEngine(String loadPath) {

+        init(loadPath);

+    }

+

+    // my implementation for CompiledScript

+    private class JRubyCompiledScript extends CompiledScript {

+        // my compiled code

+        private Node node;     

+

+        JRubyCompiledScript (Node node) {

+            this.node = node;

+        }

+

+        public ScriptEngine getEngine() {

+            return TuscanyJRubyScriptEngine.this;

+        }

+

+        public Object eval(ScriptContext ctx) throws ScriptException {

+            return evalNode(node, ctx);

+        }

+    }

+

+    // Compilable methods

+    public CompiledScript compile(String script) 

+                                  throws ScriptException {  

+        Node node = compileScript(script, context);

+        return new JRubyCompiledScript(node);

+    }

+

+    public CompiledScript compile (Reader reader) 

+                                  throws ScriptException {  

+        Node node = compileScript(reader, context);

+        return new JRubyCompiledScript(node);

+    }

+

+    // Invocable methods

+    public Object invokeFunction(String name, Object... args) 

+                         throws ScriptException, NoSuchMethodException {       

+        return invokeImpl(null, name, args, Object.class);

+    }

+

+    public Object invokeMethod(Object obj, String name, Object... args) 

+                         throws ScriptException, NoSuchMethodException {       

+        if (obj == null) {

+            throw new IllegalArgumentException("script object is null");

+        }

+        return invokeImpl(obj, name, args, Object.class);

+    }

+

+    public Object getInterface(Object obj, Class clazz) {

+        if (obj == null) {

+            throw new IllegalArgumentException("script object is null");

+        }

+        return makeInterface(obj, clazz);

+    }

+

+    public Object getInterface(Class clazz) {

+        return makeInterface(null, clazz);

+    }

+

+    private <T> T makeInterface(Object obj, Class<T> clazz) {

+        if (clazz == null || !clazz.isInterface()) {

+            throw new IllegalArgumentException("interface Class expected");

+        }

+        final Object thiz = obj;

+        return (T) Proxy.newProxyInstance(

+              clazz.getClassLoader(),

+              new Class[] { clazz },

+              new InvocationHandler() {

+                  public Object invoke(Object proxy, Method m, Object[] args)

+                                       throws Throwable {

+                      return invokeImpl(thiz, m.getName(),

+                                        args, m.getReturnType());

+                  }

+              });

+    }

+

+    // ScriptEngine methods

+    public synchronized Object eval(String str, ScriptContext ctx) 

+                       throws ScriptException { 

+        Node node = compileScript(str, ctx);

+        return evalNode(node, ctx);

+    }

+

+    public synchronized Object eval(Reader reader, ScriptContext ctx)

+                       throws ScriptException { 

+        Node node = compileScript(reader, ctx);

+        return evalNode(node, ctx);

+    }

+

+    public ScriptEngineFactory getFactory() {

+        synchronized (this) {

+            if (factory == null) {

+                factory = new JRubyScriptEngineFactory();

+            }

+        }

+        return factory;

+    }

+

+    public Bindings createBindings() {

+        return new SimpleBindings();

+    }

+

+    // package-private methods

+    void setFactory(ScriptEngineFactory factory) {

+        this.factory = factory;

+    } 

+

+    // internals only below this point    

+

+    private Object rubyToJava(IRubyObject value) {

+        return rubyToJava(value, Object.class);

+    }

+

+    private Object rubyToJava(IRubyObject value, Class type) {

+        return JavaUtil.convertArgument(

+                runtime,

+                Java.ruby_to_java(value, value, Block.NULL_BLOCK), 

+                type);

+    }

+

+    private IRubyObject javaToRuby(Object value) {

+        if (value instanceof IRubyObject) {

+            return (IRubyObject) value;

+        }

+        IRubyObject result = JavaUtil.convertJavaToRuby(runtime, value);

+        if (result instanceof JavaObject) {

+            return runtime.getModule("JavaUtilities").callMethod(runtime.getCurrentContext(), "wrap", result);

+        }

+        return result;

+    }   

+

+    private synchronized Node compileScript(String script, ScriptContext ctx) 

+                                 throws ScriptException {

+        GlobalVariables oldGlobals = runtime.getGlobalVariables();  

+        try {

+            setErrorWriter(ctx.getErrorWriter());

+            setGlobalVariables(ctx);

+            String filename = (String) ctx.getAttribute(ScriptEngine.FILENAME);

+            if (filename == null) {

+                filename = "<unknown>";

+            }            

+            return runtime.parseEval(script, filename, null, 0);

+        } catch (RaiseException e) {

+            RubyException re =  e.getException();

+            runtime.printError(re);

+            throw new ScriptException(e);

+        } catch (Exception e) {

+            throw new ScriptException(e);

+        } finally {

+            if (oldGlobals != null) {

+                setGlobalVariables(oldGlobals);

+            }

+        }

+    }

+

+    private synchronized Node compileScript(Reader reader, ScriptContext ctx) 

+                                 throws ScriptException {

+        GlobalVariables oldGlobals = runtime.getGlobalVariables();  

+        try {

+            setErrorWriter(ctx.getErrorWriter());

+            setGlobalVariables(ctx);

+            String filename = (String) ctx.getAttribute(ScriptEngine.FILENAME);

+            if (filename == null) {

+                filename = "<unknown>";

+                String script = getRubyScript(reader);

+                return runtime.parseEval(script, filename, null, 0);

+            }

+            InputStream inputStream = getRubyReader(filename);

+            return runtime.parseFile(inputStream, filename, null);

+        } catch (RaiseException e) {

+            RubyException re =  e.getException();

+            runtime.printError(re);

+            throw new ScriptException(e);

+        } catch (Exception exp) {

+            throw new ScriptException(exp);

+        } finally {

+            if (oldGlobals != null) {

+                setGlobalVariables(oldGlobals);

+            }

+        }

+    }

+

+    private String getRubyScript(Reader reader) throws IOException {

+        StringBuffer sb = new StringBuffer();

+        char[] cbuf;

+        while (true) {

+            cbuf = new char[8*1024];

+            int chars = reader.read(cbuf, 0, cbuf.length);

+            if (chars < 0) {

+                break;

+            }

+            sb.append(cbuf, 0, chars);

+        }

+        cbuf = null;

+        return (new String(sb)).trim();

+    }

+    

+    private InputStream getRubyReader(String filename) throws FileNotFoundException {

+        File file = new File(filename);

+        return new FileInputStream(file);

+    }

+

+    private void setGlobalVariables(final ScriptContext ctx) {

+        ctx.setAttribute("context", ctx, ScriptContext.ENGINE_SCOPE);

+        setGlobalVariables(new GlobalVariables(runtime) {

+                GlobalVariables parent = runtime.getGlobalVariables();

+

+            @Override

+                public void define(String name, IAccessor accessor) {

+                    assert name != null;

+                    assert accessor != null;

+                    assert name.startsWith("$");

+                    synchronized (ctx) {

+                        Bindings engineScope = ctx.getBindings(ScriptContext.ENGINE_SCOPE);                  

+                        engineScope.put(name, new GlobalVariable(accessor)); 

+                    }

+                }

+

+            @Override

+                public void defineReadonly(String name, IAccessor accessor) {

+                    assert name != null;

+                    assert accessor != null;

+                    assert name.startsWith("$");

+                    synchronized (ctx) {

+                        Bindings engineScope = ctx.getBindings(ScriptContext.ENGINE_SCOPE);

+                        engineScope.put(name, new GlobalVariable(new 

+                                             ReadonlyAccessor(name, accessor)));

+                    }

+                } 

+

+            @Override

+                public boolean isDefined(String name) {

+                    assert name != null;

+                    assert name.startsWith("$");

+                    synchronized (ctx) {

+                        String modifiedName = name.substring(1);

+                        boolean defined = ctx.getAttributesScope(modifiedName) != -1;

+                        return defined ? true : parent.isDefined(name);

+                    }

+                }

+

+            @Override

+                public void alias(String name, String oldName) {

+                    assert name != null;

+                    assert oldName != null;

+                    assert name.startsWith("$");

+                    assert oldName.startsWith("$");

+

+                    if (runtime.getSafeLevel() >= 4) {

+                        throw runtime.newSecurityError("Insecure: can't alias global variable");

+                    }

+

+                    synchronized (ctx) {

+                        int scope = ctx.getAttributesScope(name);

+                        if (scope == -1) {

+                            scope = ScriptContext.ENGINE_SCOPE;

+                        }

+

+                        IRubyObject value = get(oldName);

+                        ctx.setAttribute(name, rubyToJava(value), scope);

+                    }

+                }

+

+            @Override

+                public IRubyObject get(String name) {

+                    assert name != null;

+                    assert name.startsWith("$");

+

+                    synchronized (ctx) {

+                        // skip '$' and try

+                        String modifiedName = name.substring(1);

+                        int scope = ctx.getAttributesScope(modifiedName);

+                        if (scope == -1) {

+                            return parent.get(name);

+                        }

+

+                        Object obj = ctx.getAttribute(modifiedName, scope);

+                        if (obj instanceof IAccessor) {

+                            return ((IAccessor)obj).getValue();

+                        } else {

+                            return javaToRuby(obj);

+                        }

+                    }                    

+                }

+

+            @Override

+                public IRubyObject set(String name, IRubyObject value) {

+                    assert name != null;

+                    assert name.startsWith("$");

+

+                    if (runtime.getSafeLevel() >= 4) {

+                        throw runtime.newSecurityError("Insecure: can't change global variable value");

+                    }

+

+                    synchronized (ctx) {

+                        // skip '$' and try

+                        String modifiedName = name.substring(1);

+                        int scope = ctx.getAttributesScope(modifiedName);

+                        if (scope == -1) {

+                            scope = ScriptContext.ENGINE_SCOPE;

+                        }

+                        IRubyObject oldValue = get(name);

+                        Object obj = ctx.getAttribute(modifiedName, scope);

+                        if (obj instanceof IAccessor) {

+                            ((IAccessor)obj).setValue(value);

+                        } else {                        

+                            ctx.setAttribute(modifiedName, rubyToJava(value), scope);

+                            if ("KCODE".equals(modifiedName)) {

+                                setKCode((String)rubyToJava(value));

+                            } else if ("stdout".equals(modifiedName)) {

+                                equalOutputs((RubyObject)value);

+                            }

+                        }

+                        return oldValue;

+                    }

+                }

+

+            @Override

+                public Set<String> getNames() {                    

+                    HashSet set = new HashSet();

+                    synchronized (ctx) {

+                        for (Object scope : ctx.getScopes()) {

+                            Bindings b = ctx.getBindings((Integer)scope);

+                            if (b != null) {

+                                for (Object key: b.keySet()) {

+                                    set.add(key);

+                                }

+                            }

+                        }

+                    }

+                    for (Iterator<String> names = parent.getNames().iterator(); names.hasNext();) {

+                        set.add(names.next());

+                    }

+                    return Collections.unmodifiableSet(set);

+                }

+

+            @Override

+                public IRubyObject getDefaultSeparator() {

+                    return parent.getDefaultSeparator();

+                }

+            });

+    }

+

+    private void setGlobalVariables(GlobalVariables globals) {

+        runtime.setGlobalVariables(globals);

+    }

+

+    private synchronized Object evalNode(Node node, ScriptContext ctx) 

+                            throws ScriptException {

+        GlobalVariables oldGlobals = runtime.getGlobalVariables();

+        try {

+            setWriterOutputStream(ctx.getWriter());

+            setErrorWriter(ctx.getErrorWriter());

+            setGlobalVariables(ctx);

+            return rubyToJava(runtime.runNormally(node, false));

+        } catch (Exception exp) {

+            throw new ScriptException(exp);

+        } finally {

+            try {

+                JavaEmbedUtils.terminate(runtime);

+            } catch (RaiseException e) {

+                RubyException re =  e.getException();

+                runtime.printError(re);

+                if (!runtime.fastGetClass("SystemExit").isInstance(re)) {

+                    throw new ScriptException(e);

+                }

+            } finally {

+                if (oldGlobals != null) {

+                    setGlobalVariables(oldGlobals);

+                }

+            }

+        }

+    }

+

+    private void init(final String loadPath) {

+        AccessController.doPrivileged(new PrivilegedAction<Object>() {

+            public Object run() {

+                runtime = Ruby.newInstance();

+                IAccessor d = new ValueAccessor(runtime.newString("<script>"));

+                runtime.getGlobalVariables().define("$PROGRAM_NAME", d);

+                runtime.getGlobalVariables().define("$0", d);

+                String path = loadPath;

+                if (path == null) {

+                    path = System.getProperty("java.class.path");

+                }

+                List list = Arrays.asList(path.split(File.pathSeparator));

+                runtime.getLoadService().init(list);

+                runtime.getLoadService().require("java");

+                return null;

+            }

+        });

+    }

+

+    private synchronized Object invokeImpl(final Object obj, String method, 

+                        Object[] args, Class returnType)

+                        throws ScriptException {

+        if (method == null) {

+            throw new NullPointerException("method name is null");

+        }

+        GlobalVariables oldGlobals = runtime.getGlobalVariables();

+        try {

+            setWriterOutputStream(context.getWriter());

+            setErrorWriter(context.getErrorWriter());

+            setGlobalVariables(context);           

+            IRubyObject rubyRecv = obj != null ? 

+                  JavaUtil.convertJavaToRuby(runtime, obj) : runtime.getTopSelf();

+            

+            IRubyObject result;

+            if (args != null && args.length > 0) {

+                IRubyObject[] rubyArgs = JavaUtil.convertJavaArrayToRuby(runtime, args);

+                // Create Ruby proxies for any input arguments that are not primitives.

+                IRubyObject javaUtilities = runtime.getObject().getConstant("JavaUtilities");

+                for (int i = 0; i < rubyArgs.length; i++) {

+                    IRubyObject tmp = rubyArgs[i];

+                    if (tmp instanceof JavaObject) {

+                        rubyArgs[i] = javaUtilities.callMethod(runtime.getCurrentContext(), "wrap", tmp);

+                    }

+                }

+                result = rubyRecv.callMethod(runtime.getCurrentContext(), method, rubyArgs);

+            } else {

+                result = rubyRecv.callMethod(runtime.getCurrentContext(), method);

+            }   

+            return rubyToJava(result, returnType);

+        } catch (Exception exp) {

+            throw new ScriptException(exp);

+        } finally {

+            try {

+                JavaEmbedUtils.terminate(runtime);

+            } catch (RaiseException e) {

+                RubyException re =  e.getException();

+                runtime.printError(re);

+                if (!runtime.fastGetClass("SystemExit").isInstance(re)) {

+                    throw new ScriptException(e);

+                }

+            } finally {

+                if (oldGlobals != null) {

+                    setGlobalVariables(oldGlobals);

+                }

+            }

+        }

+    }

+    

+    private void setKCode(String encoding) {

+        KCode kcode = KCode.create(runtime, encoding);

+        runtime.setKCode(kcode);

+    }

+    

+    private void equalOutputs(RubyObject value) {

+        runtime.getGlobalVariables().set("$>", value);

+        runtime.getGlobalVariables().set("$defout", value);

+    }

+    

+    private void setWriterOutputStream(Writer writer) {

+        try {

+            RubyIO dummy_io = 

+                new RubyIO(runtime, new PrintStream(new WriterOutputStream(new StringWriter())));

+            runtime.getGlobalVariables().set("$stderr", dummy_io); //discard unwanted warnings

+            RubyIO io = 

+                new RubyIO(runtime, new PrintStream(new WriterOutputStream(writer)));

+            io.getOpenFile().getMainStream().setSync(true);

+            runtime.defineGlobalConstant("STDOUT", io);

+            runtime.getGlobalVariables().set("$>", io);

+            runtime.getGlobalVariables().set("$stdout", io);

+            runtime.getGlobalVariables().set("$defout", io);

+        } catch (UnsupportedEncodingException exp) {

+            throw new IllegalArgumentException(exp);

+        }

+    }

+    

+    private void setErrorWriter(Writer writer) {

+        try {

+            RubyIO dummy_io = 

+                new RubyIO(runtime, new PrintStream(new WriterOutputStream(new StringWriter())));

+            runtime.getGlobalVariables().set("$stderr", dummy_io); //discard unwanted warnings

+            RubyIO io = 

+                new RubyIO(runtime, new PrintStream(new WriterOutputStream(writer)));

+            io.getOpenFile().getMainStream().setSync(true);

+            runtime.defineGlobalConstant("STDERR", io);

+            runtime.getGlobalVariables().set("$stderr", io);

+            runtime.getGlobalVariables().set("$deferr", io);

+        } catch (UnsupportedEncodingException exp) {

+            throw new IllegalArgumentException(exp);

+        }

+    }

+

+    private String getEncoding() {

+        String enc = System.getProperty("sun.jnu.encoding");

+        if (enc != null) {

+            return enc;

+        }

+        return ((enc = System.getProperty("file.encoding")) == null) ? "UTF-8" : enc;

+    }

+    

+    private class WriterOutputStream extends OutputStream {

+

+        private Writer writer;

+        private CharsetDecoder decoder;

+        

+        private WriterOutputStream(Writer writer) throws UnsupportedEncodingException {

+            this(writer, getEncoding());

+        }

+        

+        private WriterOutputStream(Writer writer, String enc) throws UnsupportedEncodingException {

+            this.writer = writer;

+            if (enc == null) {

+                throw new UnsupportedEncodingException("encoding is " + enc);

+            }

+            try {

+                decoder = Charset.forName(enc).newDecoder();

+            } catch (Exception e) {

+                throw new UnsupportedEncodingException("Unsupported: " + enc);

+            }

+            decoder.onMalformedInput(CodingErrorAction.REPLACE);

+            decoder.onUnmappableCharacter(CodingErrorAction.REPLACE);

+        }

+        

+        @Override

+        public void close() throws IOException {

+            synchronized(writer) {

+                decoder = null;

+                writer.close();

+            }

+        }

+

+        @Override

+        public void flush() throws IOException {

+            synchronized(writer) {

+                writer.flush();

+            }

+        }

+        

+        @Override

+        public void write(int b) throws IOException {

+            byte[] buffer = new byte[1];

+            write(buffer, 0, 1);

+        }

+        

+        @Override

+        public void write(byte[] buffer) throws IOException {

+            write(buffer, 0, buffer.length);

+        }

+

+        @Override

+        public void write(byte[] buffer, int offset, int length) throws IOException {

+            synchronized(writer) {

+                if (offset < 0 || offset > buffer.length - length || length < 0) {

+                    throw new IndexOutOfBoundsException();

+                }

+                if (length == 0) {

+                    return;

+                }

+                ByteBuffer bytes = ByteBuffer.wrap(buffer, offset, length);

+                CharBuffer chars = CharBuffer.allocate(length);

+                convert(bytes, chars);

+                char[] cbuf = new char[chars.length()];

+                chars.get(cbuf, 0, chars.length());

+                writer.write(cbuf);

+                writer.flush();

+            }

+        }

+

+        private void convert(ByteBuffer bytes, CharBuffer chars) throws IOException {

+            decoder.reset();

+            chars.clear();

+            CoderResult result = decoder.decode(bytes, chars, true);

+            if (result.isError() || result.isOverflow()) {

+                throw new IOException(result.toString());

+            } else if (result.isUnderflow()) {

+                chars.flip();

+            }

+        }

+    }

+}