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Workflow control and configuration java framework

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cz.wicketstuff.boss.flow.processor.basic;

import java.io.Serializable;

import cz.wicketstuff.boss.flow.model.IFlowState;
import cz.wicketstuff.boss.flow.model.IFlowTree;
import cz.wicketstuff.boss.flow.processor.IFlowStateResolver;
import cz.wicketstuff.boss.flow.processor.NoSuchStateException;

public class SimpleFlowStateResolver implements IFlowStateResolver, Serializable {

	private static final long serialVersionUID = 1L;
	
	private IFlowTree flowTree;

	public SimpleFlowStateResolver() {
		this(null);
	}
	
	public SimpleFlowStateResolver(IFlowTree flowTree) {
		super();
		this.flowTree = flowTree;
	}

	@Override
	public IFlowState resolveState(String stateName)
			throws NoSuchStateException {
		IFlowState s = getFlowTree().getState(stateName);
		if(s == null) {
			throw new NoSuchStateException("State name='" + stateName + "' does not exist.");
		}
		return s;
	}

	public IFlowTree getFlowTree() {
		return flowTree;
	}

	public void setFlowTree(IFlowTree flowTree) {
		this.flowTree = flowTree;
	}

	@Override
	protected void finalize() throws Throwable {
		flowTree = null;
		super.finalize();
	}


}