cz.wicketstuff.boss.flow.processor.basic.SimpleFlowStateProcessor Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of boss-flow Show documentation
Workflow control and configuration java framework
There is a newer version: 1.3.1
/*
 * Et netera, http://boss.etnetera.cz - Copyright (C) 2012 
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License (version 2.1) as published by the Free Software
 * Foundation.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * See the GNU Lesser General Public License for more details:
 * http://www.gnu.org/licenses/lgpl-3.0.txt
 * 
 */
package cz.wicketstuff.boss.flow.processor.basic;

import java.io.Serializable;
import java.util.Iterator;

import cz.wicketstuff.boss.flow.FlowException;
import cz.wicketstuff.boss.flow.model.IFlowCarter;
import cz.wicketstuff.boss.flow.model.IFlowConditionState;
import cz.wicketstuff.boss.flow.model.IFlowJoinState;
import cz.wicketstuff.boss.flow.model.IFlowSwitchState;
import cz.wicketstuff.boss.flow.model.IFlowViewState;
import cz.wicketstuff.boss.flow.model.ISwitchCase;
import cz.wicketstuff.boss.flow.processor.IFlowProcessor;
import cz.wicketstuff.boss.flow.processor.condition.IFlowConditionProcessor;
import cz.wicketstuff.boss.flow.processor.condition.IFlowSwitchProcessor;

public class SimpleFlowStateProcessor extends AbstractFlowStateProcessor {

	private static final long serialVersionUID = 1L;
	
	private IFlowConditionProcessor conditionProcessor;
	private IFlowSwitchProcessor switchProcessor;
	
	public SimpleFlowStateProcessor() {
		this(null);
	}
	
	public SimpleFlowStateProcessor(IFlowProcessor flowProcessor) {
		this(flowProcessor, null, null);
	}

	public SimpleFlowStateProcessor(
			IFlowProcessor flowProcessor,
			IFlowConditionProcessor conditionProcessor,
			IFlowSwitchProcessor switchProcessor) {
		super(flowProcessor);
		this.conditionProcessor = conditionProcessor;
		this.switchProcessor = switchProcessor;
	}

	@Override
	public void processViewState(IFlowCarter flow, IFlowViewState currentState) throws FlowException {
		// do nothing, view state is final
	}

	@Override
	public void processConditionState(IFlowCarter flow, IFlowConditionState currentState) throws FlowException {
		if(getConditionProcessor().ifCondition(currentState.getConditionExpression(), flow)) {
			flow.setNextTransition(currentState.getThenTransition());
		} else {
			flow.setNextTransition(currentState.getElseTransition());
		}
	}

	@Override
	public void processSwitchState(IFlowCarter flow, IFlowSwitchState currentState) throws FlowException {
		IFlowSwitchProcessor sp = getSwitchProcessor();
		String switchValue = sp.resolveSwitchExpression(flow, currentState.getSwitchExpression());
		boolean switched = false;
		for(Iterator ci = currentState.getSwitchCases(); ci.hasNext(); ) {
			ISwitchCase sc = ci.next();
			if(sc.getCaseName().equals(switchValue)) {
				flow.setNextTransition(sc.getTransition());
				switched = true;
				break;
			}
		}
		if(!switched) {
			flow.setNextTransition(currentState.getDefaultTransition());
		}
	}

	@Override
	public void processJoinState(IFlowCarter flow, IFlowJoinState currentState) throws FlowException {
		flow.setNextTransition(currentState.getNextTransition());
	}

	@Override
	public void processUknownState(IFlowCarter flow) throws FlowException {
		// do nothing when unknown state
	}

	public IFlowConditionProcessor getConditionProcessor() {
		return conditionProcessor;
	}

	public void setConditionProcessor(IFlowConditionProcessor conditionProcessor) {
		this.conditionProcessor = conditionProcessor;
	}

	public IFlowSwitchProcessor getSwitchProcessor() {
		return switchProcessor;
	}

	public void setSwitchProcessor(IFlowSwitchProcessor switchProcessor) {
		this.switchProcessor = switchProcessor;
	}
	
	@Override
	protected void finalize() throws Throwable {
		switchProcessor = null;
		conditionProcessor = null;
		super.finalize();
	}

	
}