SimpleCharacterMetaAttributeEditor.java

/***************************************************
*
* cismet GmbH, Saarbruecken, Germany
*
*              ... and it just works.
*
****************************************************/
/*
 * SimpleCharacterMetaAttributeEditor.java
 *
 * Created on 29. August 2004, 15:26
 */
package Sirius.navigator.ui.attributes.editor.metaobject;

import org.apache.log4j.Logger;

import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.PlainDocument;

/**
 * Ein Editor f\u00FCr Character Attribute.
 *
 * @author   Pascal
 * @version  $Revision$, $Date$
 */
public class SimpleCharacterMetaAttributeEditor extends DefaultSimpleMetaAttributeEditor {

    //~ Constructors -----------------------------------------------------------

    /**
     * Creates a new SimpleCharacterMetaAttributeEditor object.
     */
    public SimpleCharacterMetaAttributeEditor() {
        super();
        this.logger = Logger.getLogger(this.getClass());
        this.simpleValueField.setDocument(new ShortDocument());
        // this.readOnly = true;
    }

    //~ Methods ----------------------------------------------------------------

    @Override
    protected Object getComponentValue() {
        if (this.simpleValueField.getText().length() == 1) {
            return new Character(this.simpleValueField.getText().charAt(0));
        } else {
            this.simpleValueField.setText(null);
            return null;
        }
    }

    //~ Inner Classes ----------------------------------------------------------

    /**
     * Document, das nur bestimme Werte (z.B. Integer) akzeptiert
     *
     * @version  $Revision$, $Date$
     */
    protected class ShortDocument extends PlainDocument {

        //~ Methods ------------------------------------------------------------

        @Override
        public void insertString(final int i, final String s, final AttributeSet attributes)
                throws BadLocationException {
            if ((s.length() < 2) && (i == 0)) {
                super.insertString(i, s, attributes);
            } else {
                getToolkit().beep();
            }
        }
    }
}