/
BuiltinCapacityUtil.java
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/
BuiltinCapacityUtil.java
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/*
* $Id$
*
* SARL is an general-purpose agent programming language.
* More details on http://www.sarl.io
*
* Copyright (C) 2014-2016 the original authors 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 io.janusproject.kernel.bic;
import java.lang.reflect.Method;
import io.sarl.core.ExternalContextAccess;
import io.sarl.core.InnerContextAccess;
import io.sarl.lang.core.Agent;
import io.sarl.lang.core.AgentContext;
import io.sarl.lang.util.SynchronizedCollection;
/**
* Utilities that are dedicated to the built-in capacities.
*
* @author $Author: srodriguez$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
public final class BuiltinCapacityUtil {
private static Method methodGetSkill;
private BuiltinCapacityUtil() {
//
}
private static Method getMethodGetSkill() throws Exception {
if (methodGetSkill == null) {
methodGetSkill = Agent.class.getDeclaredMethod("getSkill", Class.class); //$NON-NLS-1$
methodGetSkill.setAccessible(true);
}
return methodGetSkill;
}
/**
* Replies the contexts in which the agent is located.
*
* @param agent - the agent for which the contexts must be retreived.
* @return the contexts of the agents.
* @throws Exception - when it is not possible to retreive the contexts.
*/
public static SynchronizedCollection<AgentContext> getContextsOf(Agent agent) throws Exception {
final Method method = getMethodGetSkill();
final ExternalContextAccess skill = (ExternalContextAccess) method.invoke(agent, ExternalContextAccess.class);
assert skill != null;
return skill.getAllContexts();
}
/**
* Replies the inner context of the agent, if it was created.
*
* @param agent - the agent for which the inner context must be retreived.
* @return the inner context, or <code>null</code>.
* @throws Exception - when it is not possible to retreive the inner context.
*/
public static AgentContext getContextIn(Agent agent) throws Exception {
final Method method = getMethodGetSkill();
final InnerContextAccess skill = (InnerContextAccess) method.invoke(agent, InnerContextAccess.class);
if (skill instanceof InnerContextSkill) {
final InnerContextSkill janusSkill = (InnerContextSkill) skill;
if (janusSkill.hasInnerContext()) {
return janusSkill.getInnerContext();
}
return null;
}
if (skill == null) {
return null;
}
return skill.getInnerContext();
}
}