org.eclipse.osbp.runtime.common/src/org/eclipse/osbp/runtime/common/state/impl/DirtyDataAwareGlobalState.java

/**
 * Copyright (c) 2011, 2015 - Lunifera GmbH (Gross Enzersdorf, Austria), Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0 
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *         Florian Pirchner - Initial implementation
 */
package org.eclipse.osbp.runtime.common.state.impl;

import java.util.Collection;

import org.eclipse.osbp.runtime.common.state.IDataState;

/**
 * Combines the global data state and the dirty data state.
 */
public class DirtyDataAwareGlobalState implements IDataState {

	private final IDataState dataState;
	private final IDataState dirtyState;

	public DirtyDataAwareGlobalState(IDataState dataState, IDataState dirtyState) {
		this.dataState = dataState;
		this.dirtyState = dirtyState;
	}

	@Override
	public boolean contains(Object key) {
		return dirtyState.contains(key) || dataState.contains(key);
	}

	@Override
	public Object get(Object key) {
		Object result = dirtyState.get(key);
		if (result == null) {
			result = dataState.get(key);
		}

		return result;
	}

	@Override
	public void register(Object key, Object object) {
		throw new UnsupportedOperationException("Not a valid call");
	}

	@Override
	public void registerAll(Collection<Object> objects, Hashing hasher) {
		throw new UnsupportedOperationException("Not a valid call");
	}

	@Override
	public void invalidate(Object key) {
		throw new UnsupportedOperationException("Not a valid call");
	}

	@Override
	public long size() {
		throw new UnsupportedOperationException("Not a valid call");
	}

	@Override
	public boolean empty() {
		throw new UnsupportedOperationException("Not a valid call");
	}

}