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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.api.impl;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import tools.refinery.viatra.runtime.api.IPatternMatch;
import tools.refinery.viatra.runtime.api.IQuerySpecification;
import tools.refinery.viatra.runtime.api.ViatraQueryEngine;
import tools.refinery.viatra.runtime.api.ViatraQueryMatcher;
import tools.refinery.viatra.runtime.exception.ViatraQueryException;
import tools.refinery.viatra.runtime.matchers.psystem.annotations.PAnnotation;
import tools.refinery.viatra.runtime.matchers.psystem.queries.PParameter;
import tools.refinery.viatra.runtime.matchers.psystem.queries.PQuery;
import tools.refinery.viatra.runtime.matchers.psystem.queries.QueryInitializationException;
import tools.refinery.viatra.runtime.matchers.psystem.queries.PQuery.PQueryStatus;
import tools.refinery.viatra.runtime.matchers.psystem.queries.PVisibility;
/**
* Base implementation of IQuerySpecification.
*
* @author Gabor Bergmann
*
*/
public abstract class BaseQuerySpecification<Matcher extends ViatraQueryMatcher<? extends IPatternMatch>> implements
IQuerySpecification<Matcher> {
/**
* @since 1.6
*/
protected static ViatraQueryException processInitializerError(ExceptionInInitializerError err) {
Throwable cause1 = err.getCause();
if (cause1 instanceof RuntimeException) {
Throwable cause2 = ((RuntimeException) cause1).getCause();
if (cause2 instanceof ViatraQueryException) {
return (ViatraQueryException) cause2;
} else if (cause2 instanceof QueryInitializationException) {
return new ViatraQueryException((QueryInitializationException) cause2);
}
}
throw err;
}
protected final PQuery wrappedPQuery;
protected abstract Matcher instantiate(ViatraQueryEngine engine);
/**
* For backward compatibility of code generated with previous versions of viatra query, this method has a default
* implementation returning null, indicating that a matcher can only be created using the old method, which ignores
* the hints provided by the user.
*
* @since 1.4
*/
@Override
public Matcher instantiate() {
return null;
}
/**
* Instantiates query specification for the given internal query representation.
*/
public BaseQuerySpecification(PQuery wrappedPQuery) {
super();
this.wrappedPQuery = wrappedPQuery;
wrappedPQuery.publishedAs().add(this);
}
@Override
public PQuery getInternalQueryRepresentation() {
return wrappedPQuery;
}
@Override
public Matcher getMatcher(ViatraQueryEngine engine) {
ensureInitializedInternal();
if (wrappedPQuery.getStatus() == PQueryStatus.ERROR) {
String errorMessages = wrappedPQuery.getPProblems().stream()
.map(input -> (input == null) ? "" : input.getShortMessage()).collect(Collectors.joining("\n"));
throw new ViatraQueryException(String.format("Erroneous query specification: %s %n %s", getFullyQualifiedName(), errorMessages),
"Cannot initialize matchers on erroneous query specifications.");
} else if (!engine.getScope().isCompatibleWithQueryScope(this.getPreferredScopeClass())) {
throw new ViatraQueryException(
String.format(
"Scope class incompatibility: the query %s is formulated over query scopes of class %s, "
+ " thus the query engine formulated over scope %s of class %s cannot evaluate it.",
this.getFullyQualifiedName(), this.getPreferredScopeClass().getCanonicalName(),
engine.getScope(), engine.getScope().getClass().getCanonicalName()),
"Incompatible scope classes of engine and query.");
}
return instantiate(engine);
}
protected void ensureInitializedInternal() {
wrappedPQuery.ensureInitialized();
}
// // DELEGATIONS
@Override
public List<PAnnotation> getAllAnnotations() {
return wrappedPQuery.getAllAnnotations();
}
@Override
public List<PAnnotation> getAnnotationsByName(String annotationName) {
return wrappedPQuery.getAnnotationsByName(annotationName);
}
@Override
public Optional<PAnnotation> getFirstAnnotationByName(String annotationName) {
return wrappedPQuery.getFirstAnnotationByName(annotationName);
}
@Override
public String getFullyQualifiedName() {
return wrappedPQuery.getFullyQualifiedName();
}
@Override
public List<String> getParameterNames() {
return wrappedPQuery.getParameterNames();
}
@Override
public List<PParameter> getParameters() {
return wrappedPQuery.getParameters();
}
@Override
public Integer getPositionOfParameter(String parameterName) {
return wrappedPQuery.getPositionOfParameter(parameterName);
}
/**
* @since 2.0
*/
@Override
public PVisibility getVisibility() {
return wrappedPQuery.getVisibility();
}
}
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