org.lunifera.runtime.common.state.impl.GlobalDataState.java Source code

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Here is the source code for org.lunifera.runtime.common.state.impl.GlobalDataState.java

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/**
 * Copyright (c) 2012 Committers of lunifera.org.
 * 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
 * 
 * Contributors:
 *    Florian Pirchner - initial API and implementation
 */
package org.lunifera.runtime.common.state.impl;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.lang.reflect.InvocationTargetException;

import org.apache.commons.lang.reflect.MethodUtils;
import org.lunifera.runtime.common.annotations.DtoUtils;
import org.lunifera.runtime.common.hash.HashUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Responsible to cache changed objects.
 */
public class GlobalDataState extends DataState implements PropertyChangeListener {

    private static final Logger LOGGER = LoggerFactory.getLogger(GlobalDataState.class);

    public GlobalDataState(SharedStateContext sharedStateContext) {
        super(sharedStateContext);
    }

    @Override
    public void register(Object key, Object object) {
        checkDisposed();

        if (contains(key)) {
            // already contained
            return;
        }

        super.register(key, object);

        if (object != null) {
            try {
                MethodUtils.invokeMethod(object, "addPropertyChangeListener", this);
            } catch (SecurityException e) {
                LOGGER.warn(
                        "Observer for dirtyState handling could not be added for " + object.getClass().getName());
            } catch (IllegalAccessException e) {
                LOGGER.warn(
                        "Observer for dirtyState handling could not be added for " + object.getClass().getName());
            } catch (IllegalArgumentException e) {
                LOGGER.warn(
                        "Observer for dirtyState handling could not be added for " + object.getClass().getName());
            } catch (InvocationTargetException e) {
                LOGGER.warn(
                        "Observer for dirtyState handling could not be added for " + object.getClass().getName());
            } catch (NoSuchMethodException e) {
                LOGGER.warn(
                        "Observer for dirtyState handling could not be added for " + object.getClass().getName());
            }
        }
    }

    @Override
    public void propertyChange(PropertyChangeEvent event) {
        Object object = event.getSource();
        Class<?> objClass = object.getClass();
        try {
            if (DtoUtils.isDisposeField(objClass, event.getPropertyName())) {
                handleDispose(event);
                return;
            }
        } catch (SecurityException ignoreIt) {
            LOGGER.error("{}", ignoreIt);
        }

        handleDirty(event);
    }

    /**
     * Puts the object into the dirty state.
     * 
     * @param event
     */
    protected void handleDirty(PropertyChangeEvent event) {
        Object object = event.getSource();
        Class<?> objClass = object.getClass();

        sharedStateContext.handleDirty(HashUtil.createObjectWithIdHash(objClass, object), object);
    }

    /**
     * Invalidates the object in the cache.
     * 
     * @param event
     */
    protected void handleDispose(PropertyChangeEvent event) {
        Object object = event.getSource();
        Class<?> objClass = object.getClass();

        sharedStateContext.invalidate(HashUtil.createObjectWithIdHash(objClass, object), object);
    }
}