org.jdal.vaadin.ui.form.ComboBoxFieldBuilder.java Source code

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Here is the source code for org.jdal.vaadin.ui.form.ComboBoxFieldBuilder.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.ui.form;

import java.beans.PropertyDescriptor;
import java.io.Serializable;
import java.util.Iterator;

import org.jdal.dao.Dao;
import org.jdal.service.PersistentServiceFactory;
import org.jdal.vaadin.data.ContainerDataSource;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;

import com.vaadin.ui.AbstractSelect.ItemCaptionMode;
import com.vaadin.ui.ComboBox;
import com.vaadin.ui.Field;

/**
 * FieldBuilder that creates ComboBox and fill its with items from persistent service
 * 
 * @author Jose Luis Martin - (jlm@joseluismartin.info)
 */
public class ComboBoxFieldBuilder implements FieldBuilder, Serializable {

    @Autowired
    private transient PersistentServiceFactory persistentServiceFactory;

    /**
     * Creates a new ComboBoxFieldFactory
     */
    public ComboBoxFieldBuilder() {
    }

    /**
     * Creates a new ComboBoxFieldBuilder
     * @param persistentServiceFactory persistentServiceFactory for creating persistent serivices
     */
    public ComboBoxFieldBuilder(PersistentServiceFactory persistentServiceFactory) {
        this.persistentServiceFactory = persistentServiceFactory;
    }

    /**
     * {@inheritDoc}
     */
    public Field<?> build(Class<?> clazz, String name) {
        ComboBox combo = new ComboBox();
        fillComboBox(combo, clazz, name);
        combo.setItemCaptionMode(ItemCaptionMode.ID);

        return combo;
    }

    /**
     * Fill the ComboBox with items from PersistentService
     * @param combo ComboBox to fill
     * @param clazz Class of Bean containing property name
     * @param name property name
     */
    protected void fillComboBox(ComboBox combo, Class<?> clazz, String name) {
        PropertyDescriptor pd = BeanUtils.getPropertyDescriptor(clazz, name);
        Dao<?, Serializable> service = persistentServiceFactory.createPersistentService(pd.getPropertyType());
        // fill combo
        Iterator<?> iter = service.getAll().iterator();
        while (iter.hasNext())
            combo.addItem(iter.next());
    }

    /**
     * Creates a ContainerDataSource for entity class
     * @param clazz entity class
     */
    @SuppressWarnings({ "unchecked", "rawtypes" })
    protected ContainerDataSource<?> buildContainerDataSource(Class<?> clazz) {
        ContainerDataSource<?> cds = new ContainerDataSource(clazz,
                persistentServiceFactory.createPersistentService(clazz));
        cds.init();

        return cds;
    }

    /**
     * @return the persistentServiceFactory
     */
    public PersistentServiceFactory getPersistentServiceFactory() {
        return persistentServiceFactory;
    }

    /**
     * @param persistentServiceFactory the persistentServiceFactory to set
     */
    public void setPersistentServiceFactory(PersistentServiceFactory persistentServiceFactory) {
        this.persistentServiceFactory = persistentServiceFactory;
    }
}