/*
* Copyright 2014 Groupon, Inc
* Copyright 2014 The Billing Project, LLC
*
* Groupon 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 org.killbill.automaton.dot;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import com.google.common.collect.ImmutableMap;
import org.killbill.automaton.*;
import org.killbill.automaton.graph.Helpers;
public class DefaultStateMachineConfigDOTGenerator {
private final String name;
private final StateMachineConfig config;
// We assume state names are unique across all state machines
private final Map<String, Integer> statesNodeIds = new HashMap<String, Integer>();
private DOTBuilder dot;
public DefaultStateMachineConfigDOTGenerator(final String name, final StateMachineConfig config) {
this.name = name;
this.config = config;
}
public DOTBuilder getDot() {
return dot;
}
public void build() {
dot = new DOTBuilder(name);
dot.open();
//dot.open(ImmutableMap.<String, String>of("splines", "false"));
for (final StateMachine stateMachine : config.getStateMachines()) {
final Set<String> initialStates = Helpers.findInitialStates(stateMachine);
final Set<String> finalStates = Helpers.findFinalStates(stateMachine);
dot.openCluster(stateMachine.getName());
for (final State state : stateMachine.getStates()) {
drawState(state, initialStates, finalStates);
}
for (final Transition transition : stateMachine.getTransitions()) {
drawTransition(transition);
}
dot.closeCluster();
}
for (final LinkStateMachine linkStateMachine : config.getLinkStateMachines()) {
drawLinkStateMachine(linkStateMachine);
}
dot.close();
}
@Override
public String toString() {
if (dot == null) {
build();
}
return dot.toString();
}
private void drawState(final State state, final Collection<String> initialStates, final Collection<String> finalStates) {
final Map<String, String> attributes = new HashMap<String, String>();
if (initialStates.contains(state.getName()) || finalStates.contains(state.getName())) {
attributes.put("color", "grey");
attributes.put("style", "filled");
}
final int nodeId = dot.addNode(state.getName(), attributes);
statesNodeIds.put(state.getName(), nodeId);
}
private void drawTransition(final Transition transition) {
final Integer fromNodeId = statesNodeIds.get(transition.getInitialState().getName());
final Integer toNodeId = statesNodeIds.get(transition.getFinalState().getName());
final String color;
switch (transition.getOperationResult()) {
case FAILURE:
case EXCEPTION:
color = "red";
break;
case SUCCESS:
color = "green";
break;
default:
color = "black";
break;
}
final String label = String.format("<%s<SUB>|%s</SUB>>", transition.getOperation().getName(), transition.getOperationResult().name().charAt(0));
dot.addPath(fromNodeId, toNodeId, ImmutableMap.<String, String>of("label", label, "color", color));
}
private void drawLinkStateMachine(final LinkStateMachine linkStateMachine) {
final Integer fromNodeId = statesNodeIds.get(linkStateMachine.getInitialState().getName());
final Integer toNodeId = statesNodeIds.get(linkStateMachine.getFinalState().getName());
dot.addPath(fromNodeId, toNodeId, ImmutableMap.<String, String>of("style", "dotted"));
}
}