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

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Here is the source code for org.opensprout.osaf.propertyeditor.GenericFakePropertyEditor.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 java.lang.reflect.Field;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.opensprout.osaf.util.ReflectionUtils;

/**
 * This PropertyEditor maps Fake Entity to Entity's id and visa versa.
 * Fake Entity is Entity Object has only id.
 * @author Whiteship
 * @param <T> Entity class type
 */
public class GenericFakePropertyEditor<T> extends PropertyEditorSupport {

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

    protected Class<T> entityClass;

    public GenericFakePropertyEditor(Class<T> entityClass) {
        this.entityClass = entityClass;
    }

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

    /** id -> Fake Entity */
    @Override
    public void setAsText(String id) throws IllegalArgumentException {
        logger.debug("text = " + id);
        if (id == null || id.trim().length() == 0 || id.equals("0"))
            setValue(null);
        else {
            T entity;
            try {
                entity = entityClass.newInstance();
                Field idFiled = ReflectionUtils.getField(entityClass, "id");
                idFiled.setAccessible(true);
                idFiled.set(entity, Integer.parseInt(id));
                setValue(entity);
            } catch (InstantiationException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
    }
}