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/*******************************************************************************
* Copyright (c) 2010-2012, Mark Czotter, Istvan Rath and Daniel Varro
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-v20.html.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package tools.refinery.viatra.runtime.api;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import tools.refinery.viatra.runtime.api.impl.BaseQueryGroup;
/**
* Generic implementation of {@link IQueryGroup}, covering an arbitrarily chosen set of patterns. Use the public
* constructor or static GenericQueryGroup.of(...) methods to instantiate.
*
* @author Mark Czotter
*
*/
public class GenericQueryGroup extends BaseQueryGroup {
private final Set<IQuerySpecification<?>> patterns;
/**
* Creates a GenericQueryGroup object with a set of patterns.
*
* @param patterns
*/
public GenericQueryGroup(Set<IQuerySpecification<?>> patterns) {
this.patterns = patterns;
}
@Override
public Set<IQuerySpecification<?>> getSpecifications() {
return patterns;
}
/**
* Creates a generic {@link IQueryGroup} instance from {@link IQuerySpecification} objects.
*
* @since 2.0
*/
public static IQueryGroup of(Stream<IQuerySpecification<?>> querySpecifications) {
return new GenericQueryGroup(querySpecifications.collect(Collectors.toSet()));
}
/**
* Creates a generic {@link IQueryGroup} instance from {@link IQuerySpecification} objects.
*
* @param querySpecifications
*/
public static IQueryGroup of(Set<IQuerySpecification<?>> querySpecifications) {
return new GenericQueryGroup(querySpecifications);
}
/**
* Creates a generic {@link IQueryGroup} instance from {@link IQuerySpecification} objects.
*
* @param querySpecifications
*/
public static IQueryGroup of(IQuerySpecification<?>... querySpecifications) {
return of(new HashSet<IQuerySpecification<?>>(Arrays.asList(querySpecifications)));
}
/**
* Creates a generic {@link IQueryGroup} instance from other {@link IQueryGroup} objects (subgroups).
*
*/
public static IQueryGroup of(IQueryGroup... subGroups) {
Set<IQuerySpecification<?>> patterns = new HashSet<IQuerySpecification<?>>();
for (IQueryGroup group : subGroups) {
patterns.addAll(group.getSpecifications());
}
return new GenericQueryGroup(patterns);
}
}
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