| package org.eclipse.viatra.query.application.queries.util; |
| |
| import com.google.common.collect.Sets; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.Set; |
| import org.eclipse.emf.ecore.EClass; |
| import org.eclipse.viatra.query.application.queries.EClassMatch; |
| import org.eclipse.viatra.query.application.queries.EClassMatcher; |
| import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine; |
| import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery; |
| import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification; |
| import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey; |
| import org.eclipse.viatra.query.runtime.exception.ViatraQueryException; |
| import org.eclipse.viatra.query.runtime.matchers.psystem.PBody; |
| import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable; |
| import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation; |
| import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference; |
| import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter; |
| import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint; |
| import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter; |
| import org.eclipse.viatra.query.runtime.matchers.psystem.queries.QueryInitializationException; |
| import org.eclipse.viatra.query.runtime.matchers.tuple.FlatTuple; |
| |
| /** |
| * A pattern-specific query specification that can instantiate EClassMatcher in a type-safe way. |
| * |
| * @see EClassMatcher |
| * @see EClassMatch |
| * |
| */ |
| @SuppressWarnings("all") |
| public final class EClassQuerySpecification extends BaseGeneratedEMFQuerySpecification<EClassMatcher> { |
| private EClassQuerySpecification() { |
| super(GeneratedPQuery.INSTANCE); |
| } |
| |
| /** |
| * @return the singleton instance of the query specification |
| * @throws ViatraQueryException if the pattern definition could not be loaded |
| * |
| */ |
| public static EClassQuerySpecification instance() throws ViatraQueryException { |
| try{ |
| return LazyHolder.INSTANCE; |
| } catch (ExceptionInInitializerError err) { |
| throw processInitializerError(err); |
| } |
| } |
| |
| @Override |
| protected EClassMatcher instantiate(final ViatraQueryEngine engine) throws ViatraQueryException { |
| return EClassMatcher.on(engine); |
| } |
| |
| @Override |
| public EClassMatch newEmptyMatch() { |
| return EClassMatch.newEmptyMatch(); |
| } |
| |
| @Override |
| public EClassMatch newMatch(final Object... parameters) { |
| return EClassMatch.newMatch((org.eclipse.emf.ecore.EClass) parameters[0]); |
| } |
| |
| /** |
| * Inner class allowing the singleton instance of {@link EClassQuerySpecification} to be created |
| * <b>not</b> at the class load time of the outer class, |
| * but rather at the first call to {@link EClassQuerySpecification#instance()}. |
| * |
| * <p> This workaround is required e.g. to support recursion. |
| * |
| */ |
| private static class LazyHolder { |
| private final static EClassQuerySpecification INSTANCE = new EClassQuerySpecification(); |
| |
| /** |
| * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned. |
| * This initialization order is required to support indirect recursion. |
| * |
| * <p> The static initializer is defined using a helper field to work around limitations of the code generator. |
| * |
| */ |
| private final static Object STATIC_INITIALIZER = ensureInitialized(); |
| |
| public static Object ensureInitialized() { |
| INSTANCE.ensureInitializedInternalSneaky(); |
| return null; |
| } |
| } |
| |
| private static class GeneratedPQuery extends BaseGeneratedEMFPQuery { |
| private final static EClassQuerySpecification.GeneratedPQuery INSTANCE = new GeneratedPQuery(); |
| |
| @Override |
| public String getFullyQualifiedName() { |
| return "org.eclipse.viatra.query.application.queries.eClass"; |
| } |
| |
| @Override |
| public List<String> getParameterNames() { |
| return Arrays.asList("ec"); |
| } |
| |
| @Override |
| public List<PParameter> getParameters() { |
| return Arrays.asList(new PParameter("ec", "org.eclipse.emf.ecore.EClass")); |
| } |
| |
| @Override |
| public Set<PBody> doGetContainedBodies() throws QueryInitializationException { |
| Set<PBody> bodies = Sets.newLinkedHashSet(); |
| try { |
| { |
| PBody body = new PBody(this); |
| PVariable var_ec = body.getOrCreateVariableByName("ec"); |
| new TypeConstraint(body, new FlatTuple(var_ec), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EClass"))); |
| body.setSymbolicParameters(Arrays.<ExportedParameter>asList( |
| new ExportedParameter(body, var_ec, "ec") |
| )); |
| // EClass(ec) |
| new TypeConstraint(body, new FlatTuple(var_ec), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EClass"))); |
| bodies.add(body); |
| } |
| { |
| PAnnotation annotation = new PAnnotation("Item"); |
| annotation.addAttribute("item", new ParameterReference("ec")); |
| annotation.addAttribute("label", "EC: $ec.name$"); |
| addAnnotation(annotation); |
| } |
| { |
| PAnnotation annotation = new PAnnotation("Format"); |
| annotation.addAttribute("color", "#e8da2c"); |
| addAnnotation(annotation); |
| } |
| // to silence compiler error |
| if (false) throw new ViatraQueryException("Never", "happens"); |
| } catch (ViatraQueryException ex) { |
| throw processDependencyException(ex); |
| } |
| return bodies; |
| } |
| } |
| } |