/
Scopes.java
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/
Scopes.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.sarl.util;
import io.sarl.lang.core.Address;
import io.sarl.lang.core.Scope;
/**
* This class consists exclusively of static methods that operate on or return scopes.
*
* @author $Author: srodriguez$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
public final class Scopes {
private static final Scope<?> ALL = new AlwaysTrueScope();
private Scopes() {
//
}
/**
* Scope matching all agents in a Space.
*
* @param <T> - type of the elements in the scope.
* @return the scope that corresponds to all.
*/
@SuppressWarnings("unchecked")
public static <T> Scope<T> allParticipants() {
return (Scope<T>) ALL;
}
/** Create an scope restricted to the given addresses.
*
* @param addresses - addresses to put in the scope.
* @return the scope restricted to the given addresses.
*/
public static Scope<Address> addresses(Address... addresses) {
return new AddressScope(addresses);
}
/** A scope that is matching all the elements.
*
* @author $Author: sgalland$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
private static class AlwaysTrueScope implements Scope<Object> {
private static final long serialVersionUID = -3193147362292037L;
AlwaysTrueScope() {
//
}
@Override
public String toString() {
return "AlwaysTRUE"; //$NON-NLS-1$
}
@Override
public boolean matches(Object element) {
return true;
}
}
}