/* $RCSfile$
* $Author$
* $Date$
* $Revision$
*
* Copyright (C) 2003-2007 The Jmol Development Team
*
* Contact: cdk-devel@lists.sourceforge.net
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.openscience.cdk.io.listener;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Writer;
import java.util.Properties;
import org.openscience.cdk.exception.CDKException;
import org.openscience.cdk.io.ReaderEvent;
import org.openscience.cdk.io.setting.IOSetting;
/**
* Answers the questions by looking up the values in a Properties
* object. The question names match the property field names.
* If no answer is found in the Property object, or if the value
* is invalid, then the default is taken.
*
* <p>For the GaussianInputWriter the properties file might look like:
* <pre>
* Basis=6-31g
* Method=b3lyp
* Command=geometry optimization
* </pre>
*
* @cdk.module io
* @cdk.githash
*
* @author Egon Willighagen <egonw@sci.kun.nl>
*/
public class PropertiesListener implements IReaderListener, IWriterListener {
private Properties props;
private PrintWriter out;
public PropertiesListener(Properties props) {
this.props = props;
this.setOutputWriter(new OutputStreamWriter(System.out));
}
/**
* Overwrites the default writer to which the output is directed.
*/
public void setOutputWriter(Writer writer) {
if (writer instanceof PrintWriter) {
this.out = (PrintWriter)writer;
} else if (writer == null) {
this.out = null;
} else {
this.out = new PrintWriter(writer);
}
}
public void frameRead(ReaderEvent event) {}
/**
* Processes the IOSettings by listing the question, giving the options
* and asking the user to provide their choice.
*
* <p>Note: if the input reader is <code>null</code>, then the method
* does not wait for an answer, and takes the default.
*/
public void processIOSettingQuestion(IOSetting setting) {
String questionName = setting.getName();
if (props != null) {
String propValue = props.getProperty(questionName, setting.getSetting());
try {
setting.setSetting(propValue);
} catch (CDKException exception) {
String message = "Submitted Value (" + propValue + ") is not valid!";
out.println(message);
}
}
}
}