/*

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

  *

  * The contents of this file are subject to the terms of either the GNU

  * General Public License Version 2 only ("GPL") or the Common

  * Development and Distribution License("CDDL") (collectively, the

  * "License"). You may not use this file except in compliance with the

  * License. You can obtain a copy of the License at

  * http://www.netbeans.org/cddl-gplv2.html

  * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

  * specific language governing permissions and limitations under the

  * License.  When distributing the software, include this License Header

  * Notice in each file and include the License file at

  * nbbuild/licenses/CDDL-GPL-2-CP.  Sun designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Sun in the GPL Version 2 section of the License file that

  * accompanied this code. If applicable, add the following below the

  * License Header, with the fields enclosed by brackets [] replaced by

  * your own identifying information:

  * "Portions Copyrighted [year] [name of copyright owner]"

  *

  * Contributor(s):

  *

  * Portions Copyrighted 2009 Jaroslav Tulach

  */

 package cz.xelfi.quoridor.freemarkerdor;

 import com.sun.jersey.spi.template.TemplateProcessor;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.InputStreamReader;

 import java.io.OutputStream;

 import java.io.OutputStreamWriter;

 import java.io.Writer;

 import java.util.Map;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 import javax.script.Bindings;

 import javax.script.ScriptContext;

 import javax.script.ScriptEngine;

 import javax.script.ScriptEngineManager;

 import javax.script.ScriptException;

 import javax.ws.rs.ext.Provider;

 import org.openide.filesystems.FileUtil;

 /**

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  */

 @Provider

 public class FreemarkerProcessor implements TemplateProcessor {

     private ScriptEngineManager manager;

     public String resolve(String name) {

         return name;

     }

     public void writeTo(String fqn, Object model, OutputStream out) throws IOException {

         synchronized (this) {

             if (manager == null) {

                 manager = new ScriptEngineManager();

             }

         }

         ScriptEngine eng = manager.getEngineByName("freemarker");

         if (eng == null) {

             throw new IOException("freemarker not found!");

         }

         Bindings bind = eng.getContext().getBindings(ScriptContext.ENGINE_SCOPE);

         if (model instanceof Map) {

             bind.putAll((Map<? extends String, ? extends Object>)model);

         }

         bind.put("model", model);

         Writer w = new OutputStreamWriter(out);

         eng.getContext().setWriter(w);

         eng.getContext().setAttribute(ScriptEngine.FILENAME, fqn, ScriptContext.ENGINE_SCOPE);

         // silly workaround for

         // http://openide.netbeans.org/issues/show_bug.cgi?id=170177

         eng.getContext().setAttribute("org.openide.filesystems.FileObject", FileUtil.createData(FileUtil.getConfigRoot(), fqn), ScriptContext.ENGINE_SCOPE);

         InputStream is = FreemarkerProcessor.class.getResourceAsStream(fqn);

         if (is == null) {

             throw new IOException("Not found " + fqn); // NOI18N

         }

         InputStreamReader r = new InputStreamReader(is, "UTF-8");

         try {

             eng.eval(r);

         } catch (ScriptException ex) {

             ex.printStackTrace();

             throw new IOException(ex);

         }

     }

 }