org.lunifera.runtime.web.vaadin.databinding.component.internal.SimpleAccessorProperty.java Source code

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Here is the source code for org.lunifera.runtime.web.vaadin.databinding.component.internal.SimpleAccessorProperty.java

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/**
 * Copyright (c) 2011 - 2014, Lunifera GmbH (Gross Enzersdorf), Loetz KG (Heidelberg)
 * 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
 * 
 * Based on ideas from Eclipse Databinding.
 * 
 * Contributors: 
 *       Florian Pirchner - Initial implementation
 */

package org.lunifera.runtime.web.vaadin.databinding.component.internal;

import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import org.apache.commons.beanutils.PropertyUtils;
import org.lunifera.runtime.web.vaadin.databinding.properties.AbstractVaadinValueProperty;

/**
 * Uses reflection to access getter and setter method.
 */
public class SimpleAccessorProperty extends AbstractVaadinValueProperty {

    private Class<?> type;
    private Method getter;
    private Method setter;

    public SimpleAccessorProperty(Class<?> componentClass, String property) {
        super();

        PropertyDescriptor result = getPropertyDescriptor(componentClass, property);
        this.getter = PropertyUtils.getReadMethod(result);
        this.setter = PropertyUtils.getWriteMethod(result);
        this.type = getter.getReturnType();
    }

    /**
     * Returns the property descriptor for the given class and the property.
     * 
     * @param componentClass
     * @param property
     * @return
     */
    protected PropertyDescriptor getPropertyDescriptor(Class<?> componentClass, String property) {
        PropertyDescriptor result = null;
        for (PropertyDescriptor descriptor : PropertyUtils.getPropertyDescriptors(componentClass)) {
            if (descriptor.getName().equals(property)) {
                result = descriptor;
                break;
            }
        }
        return result;
    }

    public Object getValueType() {
        return type;
    }

    protected Object doGetValue(Object source) {
        try {
            return getter.invoke(source);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        } catch (IllegalArgumentException e) {
            throw new RuntimeException(e);
        } catch (InvocationTargetException e) {
            throw new RuntimeException(e);
        }
    }

    protected void doSetValue(Object source, Object value) {
        if (setter == null) {
            throw new UnsupportedOperationException("Not supported!");
        }
        try {
            setter.invoke(source, value);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        } catch (IllegalArgumentException e) {
            throw new RuntimeException(e);
        } catch (InvocationTargetException e) {
            throw new RuntimeException(e);
        }
    }
}