[sling-scala commit] r4 - trunk/scala-standalone

[co...@google.com]

Author: janandith
Date: Thu Jun  5 10:44:51 2008
New Revision: 4

Added:
   trunk/scala-standalone/AbstractScriptEngineFactory.java
   trunk/scala-standalone/AbstractSlingScriptEngine.java
   trunk/scala-standalone/Scala.java
   trunk/scala-standalone/ScalaScriptEngine.java
   trunk/scala-standalone/ScalaScriptEngineFactory.java

Log:


Added: trunk/scala-standalone/AbstractScriptEngineFactory.java
==============================================================================
--- (empty file)
+++ trunk/scala-standalone/AbstractScriptEngineFactory.java	Thu Jun  5 
10:44:51 2008
@@ -0,0 +1,173 @@
+/*
+ * 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.
+ */
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.jar.Attributes;
+import java.util.jar.Manifest;
+
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineFactory;
+
+public abstract class AbstractScriptEngineFactory implements
+        ScriptEngineFactory {
+
+    private String engineName;
+
+    private String engineVersion;
+
+    private List<String> extensions;
+
+    private List<String> mimeTypes;
+
+    private List<String> names;
+
+    protected AbstractScriptEngineFactory() {
+        String name = null;
+        String version = null;
+
+        // try to get the manifest
+        Manifest manifest = null;
+        InputStream ins = null;
+        try {
+            ins = getClass().getResourceAsStream("/META-INF/MANIFEST.MF");
+            if (ins != null) {
+                manifest = new Manifest(ins);
+                Attributes attrs = manifest.getMainAttributes();
+                name = attrs.getValue("ScriptEngine-Name");
+                version = attrs.getValue("ScriptEngine-Version");
+            }
+        } catch (IOException ioe) {
+            // might want to log ?
+        } finally {
+            if (ins != null) {
+                try {
+                    ins.close();
+                } catch (IOException ignore) {
+                }
+            }
+        }
+
+        // fall back to class name and version zero
+        if (name == null) {
+            String className = getClass().getName();
+            name = className.substring(className.lastIndexOf('.') + 1);
+        }
+        if (version == null) {
+            version = "0";
+        }
+
+        setEngineName(name);
+        setEngineVersion(version);
+
+        setExtensions((String[]) null);
+        setMimeTypes((String[]) null);
+        setNames((String[]) null);
+    }
+
+    public String getEngineName() {
+        return engineName;
+    }
+
+    protected void setEngineName(String engineName) {
+        this.engineName = engineName;
+    }
+
+    public String getEngineVersion() {
+        return engineVersion;
+    }
+
+    protected void setEngineVersion(String engineVersion) {
+        this.engineVersion = engineVersion;
+    }
+
+    public List<String> getExtensions() {
+        return extensions;
+    }
+
+    protected void setExtensions(String... extensions) {
+        if (extensions == null) {
+            this.extensions = Collections.emptyList();
+        } else {
+            this.extensions = Arrays.asList(extensions);
+        }
+    }
+
+    public List<String> getMimeTypes() {
+        return mimeTypes;
+    }
+
+    protected void setMimeTypes(String... mimeTypes) {
+        if (mimeTypes == null) {
+            this.mimeTypes = Collections.emptyList();
+        } else {
+            this.mimeTypes = Arrays.asList(mimeTypes);
+        }
+    }
+
+    public List<String> getNames() {
+        return names;
+    }
+
+    protected void setNames(String... names) {
+        if (names == null) {
+            this.names = Collections.emptyList();
+        } else {
+            this.names = Arrays.asList(names);
+        }
+    }
+
+    public String getMethodCallSyntax(String obj, String m, String[] 
args) {
+        StringBuffer callSyntax = new StringBuffer();
+        callSyntax.append(obj).append('.').append(m).append('(');
+        for (int i = 0; args != null && i < args.length; i++) {
+            if (i > 0) callSyntax.append(',');
+            callSyntax.append(args[i]);
+        }
+        callSyntax.append(')');
+        return callSyntax.toString();
+    }
+
+    public String getOutputStatement(String value) {
+        return "out.print(" + value + ")";
+    }
+
+    public Object getParameter(String name) {
+        if (ScriptEngine.ENGINE.equals(name)) {
+            return getEngineName();
+        } else if (ScriptEngine.ENGINE_VERSION.equals(name)) {
+            return getEngineVersion();
+        } else if (ScriptEngine.NAME.equals(name)) {
+            return getNames();
+        } else if (ScriptEngine.LANGUAGE.equals(name)) {
+            return getLanguageName();
+        } else if (ScriptEngine.LANGUAGE_VERSION.equals(name)) {
+            return getLanguageVersion();
+        }
+        return null;
+    }
+
+    public String getProgram(String[] arg0) {
+        return null;
+    }
+
+}

Added: trunk/scala-standalone/AbstractSlingScriptEngine.java
==============================================================================
--- (empty file)
+++ trunk/scala-standalone/AbstractSlingScriptEngine.java	Thu Jun  5 
10:44:51 2008
@@ -0,0 +1,50 @@
+/*
+ * 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.
+ */
+
+import java.io.StringReader;
+
+import javax.script.AbstractScriptEngine;
+import javax.script.Bindings;
+import javax.script.ScriptContext;
+import javax.script.ScriptEngineFactory;
+import javax.script.ScriptException;
+import javax.script.SimpleBindings;
+
+public abstract class AbstractSlingScriptEngine extends 
AbstractScriptEngine {
+
+    private final ScriptEngineFactory scriptEngineFactory;
+
+    protected AbstractSlingScriptEngine(ScriptEngineFactory 
scriptEngineFactory) {
+        this.scriptEngineFactory = scriptEngineFactory;
+    }
+
+    public Bindings createBindings() {
+        return new SimpleBindings();
+    }
+
+    public Object eval(String script, ScriptContext context) throws 
ScriptException {
+        StringReader reader = new StringReader(script);
+        return eval(reader, context);
+    }
+
+    public ScriptEngineFactory getFactory() {
+        return scriptEngineFactory;
+    }
+
+}

Added: trunk/scala-standalone/Scala.java
==============================================================================
--- (empty file)
+++ trunk/scala-standalone/Scala.java	Thu Jun  5 10:44:51 2008
@@ -0,0 +1,30 @@
+
+import javax.script.ScriptEngineFactory;
+import javax.script.ScriptEngine;
+
+
+
+public class Scala {
+	
+	public static void main(String[] args)
+	{
+		ScriptEngineFactory f = new ScalaScriptEngineFactory();
+		System.out.println("created scala factory");
+		
+		ScriptEngine e = f.getScriptEngine();
+		System.out.println("created scala engine");	
+		
+        Object sresult = null;
+        try {
+        	sresult = e.eval("4+2");
+    		System.out.println("result eveluated");	
+        } catch (Exception ex) {
+        	
+            ex.printStackTrace();
+        }
+        System.out.println(sresult.toString());		
+
+		
+	}
+
+}

Added: trunk/scala-standalone/ScalaScriptEngine.java
==============================================================================
--- (empty file)
+++ trunk/scala-standalone/ScalaScriptEngine.java	Thu Jun  5 10:44:51 2008
@@ -0,0 +1,84 @@
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.PrintWriter;
+import java.io.Reader;
+import java.io.StringWriter;
+
+import javax.script.ScriptContext;
+import javax.script.ScriptException;
+import javax.script.ScriptEngineFactory;
+
+import scala.tools.nsc.Interpreter;
+import scala.tools.nsc.Settings;
+
+
+public class ScalaScriptEngine extends AbstractSlingScriptEngine{
+	
+	Settings interpreterSettings = null;
+	Interpreter interpreter = null;
+	File engineLog = new File("index.html");
+	PrintWriter logPrinter = null;
+	StringWriter  interpreterOutput = null;
+
+	public ScalaScriptEngine(ScriptEngineFactory factory) {
+		
+
+		super(factory);
+		
+		try{
+			
+	    interpreterOutput  = new StringWriter();
+		logPrinter = new PrintWriter(interpreterOutput);		
+		interpreterSettings = new Settings();
+	
+
+		
+		interpreter = new Interpreter(interpreterSettings , logPrinter);
+		
+		}catch(Exception e){
+			
+			e.printStackTrace();
+			
+		}
+		
+		
+	}
+	
+	public Object eval(Reader script , ScriptContext scriptContext) 
throws ScriptException
+	{
+		Object result =null;
+		
+        try {
+            StringBuffer scriptString = new StringBuffer();
+            BufferedReader bufferedScript = new BufferedReader(script);
+            String nextLine = bufferedScript.readLine();
+            while (nextLine != null) {
+                scriptString.append(nextLine);
+                scriptString.append("\n");
+                nextLine = bufferedScript.readLine();
+            }
+
+		 result = interpreter.interpret(script.toString());
+		
+        }
+        catch(Exception ex)
+        {
+        	ex.printStackTrace();
+        }
+		
+		return result;
+	}
+	
+	
+	public Object eval(String script , ScriptContext scriptContext) 
throws ScriptException
+	{
+		Object result = interpreter.interpret(script);
+		System.out.println(interpreterOutput.toString());
+		return result;
+
+	}
+	
+	
+
+}

Added: trunk/scala-standalone/ScalaScriptEngineFactory.java
==============================================================================
--- (empty file)
+++ trunk/scala-standalone/ScalaScriptEngineFactory.java	Thu Jun  5 
10:44:51 2008
@@ -0,0 +1,53 @@
+/*
+ * ScalaScriptEngineFactory.java
+ *
+ * Created on April 15, 2008, 9:49 PM
+ *
+ * To change this template, choose Tools | Template Manager
+ * and open the template in the editor.
+ */
+
+
+import javax.script.ScriptEngine;
+
+
+
+/**
+ *
+ * @author Janandith
+ */
+
+public class ScalaScriptEngineFactory extends 
AbstractScriptEngineFactory {
+
+    public final static String SCALA_SCRIPT_EXTENSION = "scala";
+
+    public final static String SCALA_MIME_TYPE = "text/scala";
+
+    public final static String SHORT_NAME = "scala";
+
+    /** Creates a new instance of ScalaScriptEngineFactory */
+    public ScalaScriptEngineFactory() {
+
+        setExtensions(SCALA_SCRIPT_EXTENSION);
+        setMimeTypes(SCALA_MIME_TYPE);
+        setNames(SHORT_NAME);
+    }
+
+    public ScriptEngine getScriptEngine(){
+
+        return new ScalaScriptEngine(this);
+    }
+
+    public String getLanguageName(){
+
+        return "scala";
+    }
+
+    public String getLanguageVersion(){
+
+        return "2.7.1";
+    }
+
+}
+
+