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/*******************************************************************************
* Copyright (c) 2010-2015, 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.context;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* Data object representing the implication of an input key, in use cases including edge supertypes, edge opposites, node type constraints, etc.
*
* <p> Each instance tuple of the <i>implying input key</i> (if given) implies the presence of an instance tuple of the <i>implied input key</i> consisting of elements of the original tuple at given positions.
* When the input key is null, it is not an input constraint but some other source that implies input keys.
*
* <p> The implication is an immutable data object.
*
* @author Bergmann Gabor
*
*/
public final class InputKeyImplication {
private IInputKey implyingKey;
private IInputKey impliedKey;
private List<Integer> impliedIndices;
/**
* Optional. Instance tuples of this input key imply an instance tuple of another key.
* Sometimes it is not an input key that implies other input keys, so this attribute can be null.
*/
public IInputKey getImplyingKey() {
return implyingKey;
}
/**
* An instance tuple of this input key is implied by another key.
*/
public IInputKey getImpliedKey() {
return impliedKey;
}
/**
* The implied instance tuple consists of the values in the implying tuple at these indices.
*/
public List<Integer> getImpliedIndices() {
return impliedIndices;
}
/**
* @param implyingKey instance tuples of this input key imply an instance tuple of the other key.
* @param impliedKey instance tuple of this input key is implied by the other key.
* @param implyingIndices the implied instance tuple consists of the values in the implying tuple at these indices.
*/
public InputKeyImplication(IInputKey implyingKey, IInputKey impliedKey,
List<Integer> implyingIndices) {
super();
this.implyingKey = implyingKey;
this.impliedKey = impliedKey;
this.impliedIndices = Collections.unmodifiableList(new ArrayList<>(implyingIndices));
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result
+ ((impliedIndices == null) ? 0 : impliedIndices.hashCode());
result = prime * result
+ ((impliedKey == null) ? 0 : impliedKey.hashCode());
result = prime * result
+ ((implyingKey == null) ? 0 : implyingKey.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (!(obj instanceof InputKeyImplication))
return false;
InputKeyImplication other = (InputKeyImplication) obj;
if (impliedIndices == null) {
if (other.impliedIndices != null)
return false;
} else if (!impliedIndices.equals(other.impliedIndices))
return false;
if (impliedKey == null) {
if (other.impliedKey != null)
return false;
} else if (!impliedKey.equals(other.impliedKey))
return false;
if (implyingKey == null) {
if (other.implyingKey != null)
return false;
} else if (!implyingKey.equals(other.implyingKey))
return false;
return true;
}
}
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