EDIT

/**

* Copyright (C) 2017 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.vaadin.component;

import com.vaadin.data.Property;

import com.vaadin.ui.TextField;

/**

 * TextField which has "" as null represnetation, fixed the ugly "null"s in the

 * default  TextField implementation in vaadin 7. TODO: this might no longer be

 * required in vaadin 8 since it is supposed to have a mechanism to configure

 * the null representations.

 * <p>

 * Additional features:

 * <ul>

 *    <li>entered text is trimmed</li>

 * </ul>

 *

 *

 * @author a.kohlbecker

 * @since Dec 21, 2017

 *

 */

public class TextFieldNFix extends TextField {

    private static final long serialVersionUID = -7582619519894748364L;

    /**

     * @param format

     */

    public TextFieldNFix(String format) {

        super(format);

    }

    /**

     *

     */

    public TextFieldNFix() {

        super();

        setNullSettingAllowed(true);

    }

    /**

     * @param dataSource

     */

    public TextFieldNFix(Property dataSource) {

        super(dataSource);

    }

    /**

     * @param caption

     * @param dataSource

     */

    public TextFieldNFix(String caption, Property dataSource) {

        super(caption, dataSource);

    }

    /**

     * @param caption

     * @param value

     */

    public TextFieldNFix(String caption, String value) {

        super(caption, value);

        // TODO Auto-generated constructor stub

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public String getNullRepresentation() {

        return "";

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void setInternalValue(String newValue) {

        if(newValue != null){

            newValue = newValue.trim();

            if(newValue.isEmpty()){

                newValue = null;

            }

        }

        super.setInternalValue(newValue);

    }

}