/*
* Copyright 2016 the original author or 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 org.springframework.statemachine.config.model;
import java.util.HashMap;
import java.util.Map;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.statemachine.action.Action;
import org.springframework.statemachine.guard.Guard;
/**
* Default implementation of a {@link StateMachineComponentResolver} which resolves
* from a {@link BeanFactory} if given or from a manually registered actions and guards.
*
* @author Janne Valkealahti
*
* @param <S> the type of state
* @param <E> the type of event
*/
public class DefaultStateMachineComponentResolver<S, E> implements StateMachineComponentResolver<S, E> {
private BeanFactory beanFactory;
private final Map<String, Action<S, E>> registeredActions;
private final Map<String, Guard<S, E>> registeredGuards;
/**
* Instantiates a new default state machine component resolver.
*/
public DefaultStateMachineComponentResolver() {
this(null, null, null);
}
/**
* Instantiates a new default state machine component resolver.
*
* @param registeredActions the registered actions
* @param registeredGuards the registered guards
*/
public DefaultStateMachineComponentResolver(Map<String, Action<S, E>> registeredActions, Map<String, Guard<S, E>> registeredGuards) {
this(null, registeredActions, registeredGuards);
}
/**
* Instantiates a new default state machine component resolver.
*
* @param beanFactory the bean factory
* @param registeredActions the registered actions
* @param registeredGuards the registered guards
*/
public DefaultStateMachineComponentResolver(BeanFactory beanFactory, Map<String, Action<S, E>> registeredActions,
Map<String, Guard<S, E>> registeredGuards) {
this.beanFactory = beanFactory;
this.registeredActions = registeredActions != null ? registeredActions : new HashMap<String, Action<S, E>>();
this.registeredGuards = registeredGuards != null ? registeredGuards : new HashMap<String, Guard<S, E>>();
}
@SuppressWarnings("unchecked")
@Override
public Action<S, E> resolveAction(String id) {
Action<S, E> a = null;
a = registeredActions.get(id);
if (a == null && beanFactory != null) {
a = beanFactory.getBean(id, Action.class);
}
return a;
}
@SuppressWarnings("unchecked")
@Override
public Guard<S, E> resolveGuard(String id) {
Guard<S, E> g = null;
g = registeredGuards.get(id);
if (g == null && beanFactory != null) {
g = beanFactory.getBean(id, Guard.class);
}
return g;
}
/**
* Register {@link Action} with a given id.
*
* @param id the id
* @param action the action
*/
public void registerAction(String id, Action<S, E> action) {
registeredActions.put(id, action);
}
/**
* Register {@link Guard} with a given id.
*
* @param id the id
* @param guard the guard
*/
public void registerGuard(String id, Guard<S, E> guard) {
registeredGuards.put(id, guard);
}
/**
* Sets the bean factory.
*
* @param beanFactory the new bean factory
*/
public void setBeanFactory(BeanFactory beanFactory) {
this.beanFactory = beanFactory;
}
}