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/*******************************************************************************
* Copyright (c) 2010-2017, Grill Balázs, IncQueryLabs
* 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.rewriters;
import java.util.stream.Stream;
import tools.refinery.viatra.runtime.matchers.psystem.PTraceable;
import tools.refinery.viatra.runtime.matchers.psystem.queries.PQuery;
/**
* This interface provides methods to trace the {@link PTraceable}s of a transformed {@link PQuery} produced by
* a {@link PDisjunctionRewriter}. In case the associated rewriter is a composite (a.k.a. {@link PDisjunctionRewriterCacher}),
* this trace provider handles traces end-to-end, hiding all the intermediate transformation steps.
*
* @since 1.6
* @noimplement This interface is not intended to be implemented by clients.
*/
public interface IPTraceableTraceProvider {
/**
* Find and return the canonical {@link PTraceable}s in the original query which are the sources of the given derivative
* {@link PTraceable} according to the transformation.
*
* @param derivative a {@link PTraceable} which is contained by the {@link PQuery} produced by the associated rewriter
* @since 2.0
*/
public Stream<PTraceable> getCanonicalTraceables(PTraceable derivative);
/**
* Find and return the {@link PTraceable}s in the rewritten query which are the destinations of the given source
* {@link PTraceable} according to the transformation.
*
* @param source a {@link PTraceable} which is contained by a {@link PQuery} before rewriting
* @since 2.0
*/
public Stream<PTraceable> getRewrittenTraceables(PTraceable source);
/**
* Returns whether the given traceable element has been removed by every rewriter for a reason.
*/
public boolean isRemoved(PTraceable traceable);
/**
* Returns the reasons for which the traceable element has been removed by the rewriters.
* @return the reasons of removal during rewriting
* @since 2.0
*/
public Stream<IDerivativeModificationReason> getRemovalReasons(PTraceable traceable);
}
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