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/*******************************************************************************
* Copyright (c) 2004-2010 Gabor Bergmann 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.matchers.psystem;
import java.util.Comparator;
import java.util.Map;
import java.util.Set;
import tools.refinery.viatra.runtime.matchers.context.IQueryMetaContext;
import tools.refinery.viatra.runtime.matchers.psystem.analysis.QueryAnalyzer;
/**
* @author Gabor Bergmann
*
*/
public interface PConstraint extends PTraceable {
/**
* @since 2.1
* @return the query body this constraint belongs to
*/
public PBody getBody();
/**
* All variables affected by this constraint.
*/
public Set<PVariable> getAffectedVariables();
/**
* The set of variables whose potential values can be enumerated (once all non-deduced variables have known values).
*/
public Set<PVariable> getDeducedVariables();
/**
* A (preferably minimal) cover of known functional dependencies between variables.
* @noreference Use {@link QueryAnalyzer} instead to properly handle dependencies of pattern calls.
* @return non-trivial functional dependencies in the form of {variables} --> {variables}, where dependencies with the same lhs are unified.
*/
public Map<Set<PVariable>,Set<PVariable>> getFunctionalDependencies(IQueryMetaContext context);
public void replaceVariable(PVariable obsolete, PVariable replacement);
public void delete();
public void checkSanity();
/**
* Returns an integer ID that is guaranteed to increase strictly monotonously for constraints within a pBody.
*/
public abstract int getMonotonousID();
/**
* A comparator that orders constraints by their {@link #getMonotonousID() monotonous identifiers}. Should only used
* for tiebreaking in other comparators.
*
* @since 2.0
*/
public static final Comparator<PConstraint> COMPARE_BY_MONOTONOUS_ID = (arg0, arg1) -> arg0.getMonotonousID() - arg1.getMonotonousID();
}
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