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/*******************************************************************************
* Copyright (c) 2010-2014, Bergmann Gabor, 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.matchers.planning.operations;
import java.util.Collections;
import java.util.Set;
import tools.refinery.viatra.runtime.matchers.planning.SubPlan;
import tools.refinery.viatra.runtime.matchers.psystem.PConstraint;
import tools.refinery.viatra.runtime.matchers.util.Preconditions;
/**
* Represents a constraint application on a single parent SubPlan.
* <p> Either a "selection" filter operation according to a deferred PConstraint (or transform in case of eval/aggregate), or
* alternatively a shorthand for PJoin + a PEnumerate on the right input for an enumerable PConstraint.
*
* <p> <b>WARNING</b>: if there are coinciding variables in the variable tuple of the enumerable constraint,
* it is the responsibility of the compiler to check them for equality.
*
* @author Bergmann Gabor
*
*/
public class PApply extends POperation {
private PConstraint pConstraint;
public PApply(PConstraint pConstraint) {
super();
this.pConstraint = pConstraint;
}
public PConstraint getPConstraint() {
return pConstraint;
}
@Override
public String getShortName() {
return String.format("APPLY_%s", pConstraint.toString());
}
@Override
public Set<? extends PConstraint> getDeltaConstraints() {
return Collections.singleton(pConstraint);
}
@Override
public int numParentSubPlans() {
return 1;
}
@Override
public void checkConsistency(SubPlan subPlan) {
super.checkConsistency(subPlan);
for (SubPlan parentPlan : subPlan.getParentPlans())
Preconditions.checkArgument(!parentPlan.getAllEnforcedConstraints().contains(pConstraint),
"Double-checking constraint %s", pConstraint);
// TODO obtain context?
//if (pConstraint instanceof DeferredPConstraint)
// Preconditions.checkArgument(((DeferredPConstraint) pConstraint).isReadyAt(subPlan, context))
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime
* result
+ ((pConstraint == null) ? 0 : pConstraint
.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (!(obj instanceof PApply))
return false;
PApply other = (PApply) obj;
if (pConstraint == null) {
if (other.pConstraint != null)
return false;
} else if (!pConstraint.equals(other.pConstraint))
return false;
return true;
}
}
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