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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.api;
import tools.refinery.viatra.runtime.api.impl.BaseQuerySpecification;
import tools.refinery.viatra.runtime.matchers.ViatraQueryRuntimeException;
import tools.refinery.viatra.runtime.matchers.psystem.queries.PQuery;
import tools.refinery.viatra.runtime.matchers.psystem.queries.PVisibility;
/**
* This is a generic query specification for VIATRA pattern matchers, for "interpretative" query execution.
* Should be subclassed by query specification implementations specific to query languages.
*
* <p>
* When available, consider using the pattern-specific generated matcher API instead.
*
* <p>
* The created matcher will be of type {@link GenericPatternMatcher}. Matches of the pattern will be represented as
* {@link GenericPatternMatch}.
*
* <p>
* Note for overriding (if you have your own query language or ):
* Derived classes should use {@link #defaultInstantiate(ViatraQueryEngine)} for implementing
* {@link #instantiate(ViatraQueryEngine)} if they use {@link GenericPatternMatcher} proper.
*
* @see GenericPatternMatcher
* @see GenericPatternMatch
* @see GenericMatchProcessor
* @author Bergmann Gábor
* @noinstantiate This class is not intended to be instantiated by end-users.
* @since 0.9
*/
public abstract class GenericQuerySpecification<Matcher extends GenericPatternMatcher> extends
BaseQuerySpecification<Matcher> {
/**
* Instantiates query specification for the given internal query representation.
*/
public GenericQuerySpecification(PQuery wrappedPQuery) {
super(wrappedPQuery);
}
@Override
public GenericPatternMatch newEmptyMatch() {
return GenericPatternMatch.newEmptyMatch(this);
}
@Override
public GenericPatternMatch newMatch(Object... parameters) {
return GenericPatternMatch.newMatch(this, parameters);
}
/**
* Derived classes should use this implementation of {@link #instantiate(ViatraQueryEngine)}
* if they use {@link GenericPatternMatcher} proper.
* @throws ViatraQueryRuntimeException
*/
protected GenericPatternMatcher defaultInstantiate(ViatraQueryEngine engine) {
return GenericPatternMatcher.instantiate(engine, this);
}
/**
* @since 2.0
*/
@Override
public PVisibility getVisibility() {
return getInternalQueryRepresentation().getVisibility();
}
}
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