/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.designer.core.editor.expressions;
import java.awt.BorderLayout;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Map;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.event.ListDataEvent;
import javax.swing.event.ListDataListener;
import org.apache.bsf.BSFManager;
import org.fife.ui.rsyntaxtextarea.SyntaxConstants;
import org.pentaho.reporting.designer.core.ReportDesignerContext;
import org.pentaho.reporting.engine.classic.core.function.Expression;
import org.pentaho.reporting.engine.classic.core.modules.misc.bsf.BSFExpression;
import org.pentaho.reporting.libraries.designtime.swing.SmartComboBox;
import org.pentaho.reporting.libraries.designtime.swing.VerticalLayout;
public class BSFScriptingExpressionEditor extends ScriptingExpressionEditor
{
private static class InternalBSFManager extends BSFManager
{
private InternalBSFManager()
{
}
public static String[] getRegisteredLanguages()
{
final ArrayList<String> list = new ArrayList<String>();
final Iterator iterator = registeredEngines.entrySet().iterator();
while (iterator.hasNext())
{
final Map.Entry entry = (Map.Entry) iterator.next();
final String lang = (String) entry.getKey();
final String className = (String) entry.getValue();
try
{
// this is how BSH will load the class
Class.forName(className, false, Thread.currentThread().getContextClassLoader());
list.add(lang);
}
catch (Throwable t)
{
// ignored.
}
}
return list.toArray(new String[list.size()]);
}
}
private class UpdateLanguageHandler implements ListDataListener
{
private UpdateLanguageHandler()
{
}
public void intervalAdded(final ListDataEvent e)
{
}
public void intervalRemoved(final ListDataEvent e)
{
}
public void contentsChanged(final ListDataEvent e)
{
updateComponents();
}
private void updateComponents()
{
setSyntaxEditingStyle(mapLanguageToSyntaxHighlighting((String) languageField.getSelectedItem()));
}
}
private BSFExpression bshExpression;
private JComboBox languageField;
public BSFScriptingExpressionEditor()
{
setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_JAVA);
languageField = new SmartComboBox(new DefaultComboBoxModel(InternalBSFManager.getRegisteredLanguages()));
languageField.getModel().addListDataListener(new UpdateLanguageHandler());
final JPanel panel = new JPanel();
panel.setLayout(new VerticalLayout(5, VerticalLayout.BOTH));
panel.add(new JLabel(EditorExpressionsMessages.getString("BSFScriptingExpressionEditor.Language")));
panel.add(languageField);
getPanel().add(panel, BorderLayout.NORTH);
}
protected String getLanguage()
{
return (String) languageField.getSelectedItem();
}
public void initialize(final Expression expression, final ReportDesignerContext context)
{
bshExpression = (BSFExpression) expression;
setText(bshExpression.getExpression());
languageField.setSelectedItem(bshExpression.getLanguage());
}
public void stopEditing()
{
bshExpression.setLanguage((String) languageField.getSelectedItem());
bshExpression.setExpression(getText());
}
private String mapLanguageToSyntaxHighlighting(final String language)
{
if ("beanshell".equals(language))
{
return SyntaxConstants.SYNTAX_STYLE_JAVA;
}
if ("groovy".equals(language))
{
return SyntaxConstants.SYNTAX_STYLE_GROOVY;
}
if ("javascript".equals(language))
{
return SyntaxConstants.SYNTAX_STYLE_JAVASCRIPT;
}
if ("jython".equals(language))
{
return SyntaxConstants.SYNTAX_STYLE_PYTHON;
}
if ("xslt".equals(language))
{
return SyntaxConstants.SYNTAX_STYLE_XML;
}
return SyntaxConstants.SYNTAX_STYLE_NONE;
}
}