/**
* **** BEGIN LICENSE BLOCK *****
* Version: EPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse Public
* License Version 1.0 (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.eclipse.org/legal/epl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2009 Yoko Harada <yokolet@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the EPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the EPL, the GPL or the LGPL.
* **** END LICENSE BLOCK *****
*/
package org.jruby.embed.jsr223;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import javax.script.Bindings;
import javax.script.ScriptContext;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineFactory;
import javax.script.ScriptException;
import javax.script.SimpleBindings;
/**
* This is a substitute of javax.script.ScriptEngineManager.
*
* With this script engine manager, you can avoid two known troubles. One this
* happens on OS X JDK 5 which tries to load AppleScriptEngine and ends up in the
* exception. Another one happens when you use livetribe version of javax.script
* and GLOBAL_SCOPE. The livetribe javax.script has a bug to handle GLOBAL_SCOPE.
*
* @author Yoko Harada <yokolet@gmail.com>
*/
public class JRubyScriptEngineManager {
private static final String service = "META-INF/services/javax.script.ScriptEngineFactory";
private HashSet<ScriptEngineFactory> factories;
private HashMap<String, ScriptEngineFactory> nameMap;
private HashMap<String, ScriptEngineFactory> extensionMap;
private HashMap<String, ScriptEngineFactory> mimetypeMap;
private Bindings globalMap;
public JRubyScriptEngineManager() throws ScriptException {
this(null);
}
public JRubyScriptEngineManager(ClassLoader loader) throws ScriptException {
init(loader);
}
private void init(ClassLoader loader) throws ScriptException {
nameMap = new HashMap();
extensionMap = new HashMap();
mimetypeMap = new HashMap();
globalMap = new SimpleBindings();
try {
factories =
(HashSet<ScriptEngineFactory>) (new ServiceFinder(loader, service)).getServices();
if (factories.isEmpty()) {
System.err.println("no factory");
}
prepareMaps();
} catch (Exception e) {
e.printStackTrace();
throw new ScriptException(e);
}
}
private void prepareMaps() {
for (ScriptEngineFactory factory : factories) {
List<String> names = factory.getNames();
for (String name : names) {
nameMap.put(name, factory);
}
List<String> extensions = factory.getExtensions();
for (String extension : extensions) {
extensionMap.put(extension, factory);
}
List<String> mimeTypes = factory.getMimeTypes();
for (String mimeType : mimeTypes) {
mimetypeMap.put(mimeType, factory);
}
}
}
public void setBindings(Bindings b) {
if (b == null) {
throw new IllegalArgumentException("Null bindings");
}
globalMap = b;
}
public Bindings getBindings() {
return globalMap;
}
public void put(String key, Object value) {
globalMap.put(key, value);
}
public Object get(String key) {
return globalMap.get(key);
}
public ScriptEngine getEngineByName(String shortName) {
if (shortName == null) {
throw new NullPointerException("Null shortName");
}
ScriptEngineFactory factory = nameMap.get(shortName);
if (factory == null) {
throw new IllegalArgumentException("No engine for " + shortName);
}
ScriptEngine engine = factory.getScriptEngine();
engine.getContext().setBindings(globalMap, ScriptContext.GLOBAL_SCOPE);
return engine;
}
public ScriptEngine getEngineByExtension(String extension) {
if (extension == null) {
throw new NullPointerException("Null extension");
}
ScriptEngineFactory factory = extensionMap.get(extension);
if (factory == null) {
throw new IllegalArgumentException("No engine for " + extension);
}
ScriptEngine engine = factory.getScriptEngine();
engine.getContext().setBindings(globalMap, ScriptContext.GLOBAL_SCOPE);
return engine;
}
public ScriptEngine getEngineByMimeType(String mimeType) {
if (mimeType == null) {
throw new NullPointerException("Null mimeType");
}
ScriptEngineFactory factory = mimetypeMap.get(mimeType);
if (factory == null) {
throw new IllegalArgumentException("No engine for " + mimeType);
}
ScriptEngine engine = factory.getScriptEngine();
engine.getContext().setBindings(globalMap, ScriptContext.GLOBAL_SCOPE);
return engine;
}
public List<ScriptEngineFactory> getEngineFactories() {
List<ScriptEngineFactory> l = new ArrayList();
for (ScriptEngineFactory factory : factories) {
l.add(factory);
}
return Collections.unmodifiableList(l);
}
public void registerEngineName(String name, ScriptEngineFactory factory) {
if (name == null || factory == null) {
throw new NullPointerException("name and/or factory is null.");
}
nameMap.put(name, factory);
}
public void registerEngineMimeType(String type, ScriptEngineFactory factory) {
if (type == null || factory == null) {
throw new NullPointerException("type and/or factory is null.");
}
mimetypeMap.put(type, factory);
}
public void registerEngineExtension(String extension, ScriptEngineFactory factory) {
if (extension == null || factory == null) {
throw new NullPointerException("extension and/or factory is null.");
}
extensionMap.put(extension, factory);
}
}