org.jdal.vaadin.data.ConfigurableFieldFactory.java Source code

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Here is the source code for org.jdal.vaadin.data.ConfigurableFieldFactory.java

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/*
 * Copyright 2009-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jdal.vaadin.data;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.BeanInstantiationException;
import org.springframework.beans.BeanUtils;

import com.vaadin.data.Item;
import com.vaadin.ui.Component;
import com.vaadin.ui.Field;
import com.vaadin.ui.FormFieldFactory;

/**
 * Make FormFieldFactory application context friendly.
 *  
 * @author Jose Luis Martin - (jlm@joseluismartin.info)
 */
public class ConfigurableFieldFactory implements FormFieldFactory {

    private static final Log log = LogFactory.getLog(ConfigurableFieldFactory.class);
    private Map<Object, Class<Field>> fieldMap = Collections.synchronizedMap(new HashMap<Object, Class<Field>>());

    /**
     * {@inheritDoc}
     */
    public Field createField(Item item, Object propertyId, Component uiContext) {
        Class<Field> clazz = fieldMap.get(propertyId);
        if (clazz != null) {
            try {
                return BeanUtils.instantiate(clazz);
            } catch (BeanInstantiationException bie) {
                log.error(bie);
            }
        }

        return null;
    }

}