org.opensprout.osaf.propertyeditor.AbstractGenericPropertyEditor.java Source code

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Here is the source code for org.opensprout.osaf.propertyeditor.AbstractGenericPropertyEditor.java

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/**
 * Copyright (c) 2008 OpenSprout Team.
 * 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 */
package org.opensprout.osaf.propertyeditor;

import java.beans.PropertyEditorSupport;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.opensprout.osaf.data.GenericDao;
import org.opensprout.osaf.util.ApplicationContextUtils;
import org.opensprout.osaf.util.ReflectionUtils;
import org.springframework.context.ApplicationContext;

/**
 * Generic PropertyEditor uses dao to load entity by id.
 * @author Whiteship
 * @param <T> Entity class type
 * @param <D> GenericDao type
 */
public abstract class AbstractGenericPropertyEditor<T, D extends GenericDao<T, ?>> extends PropertyEditorSupport {

    Log logger = LogFactory.getLog(getClass());

    protected Class<T> entityClass;
    protected Class<D> daoClass;
    protected D dao;

    public AbstractGenericPropertyEditor(Class<T> entityClass, Class<D> daoClass,
            ApplicationContext applicationContext) {
        this.entityClass = entityClass;
        this.daoClass = daoClass;
        dao = (D) ApplicationContextUtils.getBeanByType(applicationContext, daoClass);
    }

    /** Entity object -> Entity's id. */
    @SuppressWarnings("unchecked")
    public String getAsText() {
        T entity = (T) this.getValue();
        logger.debug("entity = " + entity);
        if (entity == null)
            return "";
        else
            return String.valueOf(ReflectionUtils.callMethod(entityClass, entity, "getId"));
    }

    /** Entity's id -> Entity object by dao. */
    @Override
    public void setAsText(String id) throws IllegalArgumentException {
        logger.debug("text = " + id);
        if (id == null || id.trim().length() == 0)
            setValue(null);
        else
            setValue(dao.get(Integer.parseInt(id)));
    }

}