Transition.java

/*********************************************************************
 Copyright 2014 the Flapi authors

 Licensed 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 unquietcode.tools.flapi.graph.components;

import unquietcode.tools.flapi.graph.GenericVisitor;
import unquietcode.tools.flapi.graph.TransitionVisitor;
import unquietcode.tools.flapi.java.MethodSignature;
import unquietcode.tools.flapi.outline.MethodInfo;
import unquietcode.tools.flapi.runtime.TransitionType;

import java.util.ArrayList;
import java.util.List;

/**
 * @author Ben Fagin
 * @version 07-10-2012
 */
public abstract class Transition implements Comparable<Transition> {
	private final List<StateClass> stateChain = new ArrayList<StateClass>();
	private final List<Integer> chainParameterPositions = new ArrayList<Integer>();
	private final TransitionType type;
	private MethodInfo methodInfo = new MethodInfo();
	private StateClass owner;

	protected Transition(TransitionType type) {
	    this.type = type;
	}

	public TransitionType getType() {
		return type;
	}

	public abstract void accept(TransitionVisitor visitor);

	public void acceptForTraversal(GenericVisitor<StateClass> visitor) {
		for (StateClass stateClass : stateChain) {
			visitor.visit(stateClass);
		}
	}

	public List<StateClass> getStateChain() {
		return stateChain;
	}

	@Override
	public int compareTo(Transition other) {
		return methodInfo.getMethodSignature().compareTo(other.info().getMethodSignature());
	}

	void setOwner(StateClass owner) {
		this.owner = owner;
	}

	public StateClass getOwner() {
		return owner;
	}

	public MethodSignature getMethodSignature() {
		return methodInfo.getMethodSignature();
	}

	public List<Integer> getChainParameterPositions() {
		return chainParameterPositions;
	}

	public MethodInfo info() {
		return methodInfo;
	}

	public void setMethodInfo(MethodInfo methodInfo) {
		this.methodInfo = methodInfo;
	}

	public abstract Transition copy();

	protected void basicCopy(Transition copy) {
		copy.methodInfo = this.methodInfo.copy();
		copy.stateChain.addAll(this.stateChain);
	}
}