1 files changed, 101 insertions, 0 deletions
diff --git a/sandbox/container.ruby/src/main/java/org/apache/tuscany/container/ruby/invoker/RubyScript.java b/sandbox/container.ruby/src/main/java/org/apache/tuscany/container/ruby/invoker/RubyScript.java
new file mode 100644
index 0000000000..ac66a13806
--- /dev/null
+++ b/sandbox/container.ruby/src/main/java/org/apache/tuscany/container/ruby/invoker/RubyScript.java
@@ -0,0 +1,101 @@
+/**
+ *
+ *  Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
+ *
+ *  Licensed 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.ruby.invoker;
+
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.lang.reflect.Method;
+import org.eclipse.emf.common.util.URI;
+
+import org.apache.bsf.BSFManager;
+import org.apache.bsf.util.IOUtils;
+import org.jruby.RubyObject;
+
+
+/**
+ * Models a Ruby script.
+ */
+public class RubyScript {
+	
+	// Script to run.
+	private String script;
+	private BSFManager bsfManager;
+	
+	/**
+	 * Initializes the script name.
+	 * @param script Full path to the script.
+	 */
+	public RubyScript(String script) {
+		this.script = script;
+		
+		// Register the BSF Engine
+        BSFManager.registerScriptingEngine("ruby", "org.jruby.javasupport.bsf.JRubyEngine", 
+        		new String[] { "rb" });
+        bsfManager = new BSFManager();
+	}
+	
+	/**
+	 * Executes the script.
+	 * @param methodName Name of the method to be executed.
+	 * @param args Arguments to the method.
+	 * @return Result of invocation.
+	 * @throws CompilationFailedException
+	 * @throws InstantiationException
+	 * @throws IllegalAccessException
+	 */
+	public Object runScript(String methodName, Object[] args) throws InstantiationException, IllegalAccessException {
+		
+		ClassLoader classLoader = getClass().getClassLoader();
+		
+		try {
+			// Get the Ruby Class
+			Object rubyClass = getRubyClass(classLoader, script);			
+			Method rubyMethod = findFunction(rubyClass, methodName);
+			Object result = null;
+			if(rubyMethod != null) {
+				result = rubyMethod.invoke(rubyClass, args);
+			}
+			return result;
+		} catch(Exception ex) {
+			ex.printStackTrace();			
+		}
+		
+		return null;
+		
+	}
+
+	// Gives the Ruby class for the corresponding script
+	// Can optimize in future by caching the instance
+	private Object getRubyClass(ClassLoader classLoader, String rubyScriptName) throws Exception {		
+		// Load the ruby script		
+		InputStream inputStream = classLoader.getResourceAsStream(rubyScriptName);
+		String script = IOUtils.getStringFromReader(new InputStreamReader(inputStream));
+		bsfManager.exec("ruby", "(java)", 1, 1, script);	
+		
+		// Get the Ruby class
+		String rubyClassName=URI.createURI(rubyScriptName).trimFileExtension().lastSegment();			
+		Object rubyClass = bsfManager.eval("ruby", "(java)", 1, 1, rubyClassName+".new");		
+		return rubyClass;
+	}
+	
+	// Find whether a particular method exists
+	private Method findFunction(Object rubyClass, String functionName) throws Exception {
+		Class[] parameterTypes = new Class[]{String.class};
+		Method method = rubyClass.getClass().getMethod(functionName, parameterTypes);
+		return method;
+	}
+}