PrimitiveField.java

/*
 * Copyright 2010 Instituto Superior Tecnico
 * 
 *      https://fenix-ashes.ist.utl.pt/
 * 
 *   This file is part of the vaadin-framework.
 *
 *   The vaadin-framework Infrastructure 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 
 *   3 of the License, or (at your option) any later version.*
 *
 *   vaadin-framework 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 vaadin-framework. If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package pt.ist.vaadinframework.ui.fields;

import java.lang.reflect.Constructor;

import org.apache.commons.lang.StringUtils;

import com.vaadin.data.Property;
import com.vaadin.data.Validator;
import com.vaadin.data.util.PropertyFormatter;
import com.vaadin.ui.TextField;

/**
 * @author Pedro Santos (pedro.miguel.santos@ist.utl.pt)
 */
@SuppressWarnings("serial")
public class PrimitiveField extends TextField {
    public PrimitiveField(Validator validator, int maxLength) {
        setNullSettingAllowed(true);
        setNullRepresentation(StringUtils.EMPTY);
        setMaxLength(maxLength);
        addValidator(validator);
    }

    @Override
    public void setPropertyDataSource(final Property newDataSource) {
        super.setPropertyDataSource(new PropertyFormatter(newDataSource) {
            @Override
            public Object parse(String formattedValue) throws Exception {
                Constructor<?> constructor = newDataSource.getType().getConstructor(String.class);
                return constructor.newInstance(formattedValue);
            }

            @Override
            public String format(Object value) {
                return value.toString();
            }
        });
    }
}