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EObjectServices.java
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EObjectServices.java
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/*******************************************************************************
* Copyright (c) 2015, 2024 Obeo.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v20.html
*
* Contributors:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.acceleo.query.services;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.eclipse.acceleo.annotations.api.documentation.Documentation;
import org.eclipse.acceleo.annotations.api.documentation.Example;
import org.eclipse.acceleo.annotations.api.documentation.Param;
import org.eclipse.acceleo.annotations.api.documentation.ServiceProvider;
import org.eclipse.acceleo.query.ast.Call;
import org.eclipse.acceleo.query.ast.StringLiteral;
import org.eclipse.acceleo.query.parser.AstBuilderListener;
import org.eclipse.acceleo.query.runtime.CrossReferenceProvider;
import org.eclipse.acceleo.query.runtime.ICompletionProposal;
import org.eclipse.acceleo.query.runtime.IReadOnlyQueryEnvironment;
import org.eclipse.acceleo.query.runtime.IRootEObjectProvider;
import org.eclipse.acceleo.query.runtime.IService;
import org.eclipse.acceleo.query.runtime.IValidationResult;
import org.eclipse.acceleo.query.runtime.impl.AbstractServiceProvider;
import org.eclipse.acceleo.query.runtime.impl.JavaMethodService;
import org.eclipse.acceleo.query.runtime.impl.Nothing;
import org.eclipse.acceleo.query.runtime.impl.ValidationServices;
import org.eclipse.acceleo.query.runtime.impl.completion.EFeatureCompletionProposal;
import org.eclipse.acceleo.query.validation.type.ClassType;
import org.eclipse.acceleo.query.validation.type.EClassifierLiteralType;
import org.eclipse.acceleo.query.validation.type.EClassifierSetLiteralType;
import org.eclipse.acceleo.query.validation.type.EClassifierType;
import org.eclipse.acceleo.query.validation.type.IType;
import org.eclipse.acceleo.query.validation.type.SequenceType;
import org.eclipse.acceleo.query.validation.type.SetType;
import org.eclipse.emf.common.util.AbstractTreeIterator;
import org.eclipse.emf.common.util.BasicEMap;
import org.eclipse.emf.common.util.EMap;
import org.eclipse.emf.common.util.TreeIterator;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EClassifier;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.EcorePackage;
import org.eclipse.emf.ecore.impl.EClassImpl;
//@formatter:off
@ServiceProvider(
value = "Services available for EObjects"
)
//@formatter:on
@SuppressWarnings({"checkstyle:javadocmethod", "checkstyle:javadoctype" })
public class EObjectServices extends AbstractServiceProvider {
/**
* {@link EClass} containment message.
*/
private static final String ONLY_E_CLASS_CAN_BE_CONTAINED_INTO_OTHER_E_CLASSES_NOT_S = "Only EClass can be contained into other EClasses not %s";
/**
* Can't contain directly or indirectly message.
*/
private static final String S_CAN_T_CONTAIN_DIRECTLY_OR_INDIRECTLY_S = "%s can't contain directly or indirectly %s";
/**
* Log message used when accessing an unknown feature.
*/
private static final String UNKNOWN_FEATURE = "Feature %s not found in EClass %s";
/**
* Log message used when accessing a feature on a JavaObject.
*/
private static final String NON_EOBJECT_FEATURE_ACCESS = "Attempt to access feature (%s) on a non ModelObject value (%s).";
/**
* Illegal state message.
*/
private static final String DON_T_KNOW_WHAT_TO_DO_WITH = "don't know what to do with ";
/**
* Filtered eAllContents {@link Iterator}.
*
* @author <a href="mailto:yvan.lussaud@obeo.fr">Yvan Lussaud</a>
*/
private static final class FilteredContentIterator extends AbstractTreeIterator<EObject> {
/**
* Generated serial version UID.
*/
private static final long serialVersionUID = -1537663884310088034L;
/**
* The {@link Set} of {@link EStructuralFeature} to navigate.
*/
private final Set<EStructuralFeature> features;
/**
* Constructor.
*
* @param object
* the root object
* @param includeRoot
* <code>true</code> to include root, <code>false</code> otherwise
* @param features
* the {@link Set} of {@link EStructuralFeature} to navigate
*/
private FilteredContentIterator(Object object, boolean includeRoot,
Set<EStructuralFeature> features) {
super(object, includeRoot);
this.features = features;
}
@Override
public Iterator<EObject> getChildren(Object object) {
final List<EObject> result = new ArrayList<EObject>();
if (object instanceof EObject) {
EObject host = (EObject)object;
EStructuralFeature[] eStructuralFeatures = ((EClassImpl.FeatureSubsetSupplier)host.eClass()
.getEAllStructuralFeatures()).containments();
if (eStructuralFeatures != null) {
for (EStructuralFeature feat : eStructuralFeatures) {
if (features.contains(feat)) {
addChildren(result, host, feat);
}
}
}
}
return result.iterator();
}
/**
* Add the children of the given {@link EObject} and the given {@link EStructuralFeature}.
*
* @param result
* the
* @param eObject
* @param feature
*/
private void addChildren(final List<EObject> result, EObject eObject, EStructuralFeature feature) {
Object value = eObject.eGet(feature);
if (feature.isMany()) {
if (value instanceof Collection<?>) {
for (Object childElement : (Collection<?>)value) {
if (childElement instanceof EObject) {
result.add((EObject)childElement);
}
}
} else {
throw new IllegalStateException(DON_T_KNOW_WHAT_TO_DO_WITH + value.getClass());
}
} else if (value instanceof EObject) {
result.add((EObject)value);
}
}
}
private static final class EObjectFeatureAccess extends JavaMethodService {
/**
* Creates a new service instance given a method and an instance.
*
* @param method
* the method that realizes the service
* @param serviceInstance
* the instance on which the service must be called
* @param forWorkspace
* tells if the {@link IService} will be used in a workspace
*/
EObjectFeatureAccess(Method method, Object serviceInstance, boolean forWorkspace) {
super(method, serviceInstance, forWorkspace);
}
/**
* {@inheritDoc}
*
* @see org.eclipse.acceleo.query.runtime.impl.JavaMethodService#getType(org.eclipse.acceleo.query.ast.Call,
* org.eclipse.acceleo.query.runtime.impl.ValidationServices,
* org.eclipse.acceleo.query.runtime.IValidationResult,
* org.eclipse.acceleo.query.runtime.IReadOnlyQueryEnvironment, java.util.List)
*/
@Override
public Set<IType> getType(Call call, ValidationServices services, IValidationResult validationResult,
IReadOnlyQueryEnvironment queryEnvironment, List<IType> argTypes) {
final String featureName = ((StringLiteral)call.getArguments().get(1)).getValue();
final Set<IType> result = featureAccessTypes(services, queryEnvironment, argTypes.get(0),
featureName);
return result;
}
/**
* Gets the type of a feature access.
*
* @param queryEnvironment
* the {@link IReadOnlyQueryEnvironment}
* @param receiverTypes
* the target types to gets the feature from
* @param featureName
* the feature name
* @return the type of a feature access
*/
public Set<IType> featureAccessTypes(ValidationServices services,
IReadOnlyQueryEnvironment queryEnvironment, IType receiverType, String featureName) {
final Set<IType> result = new LinkedHashSet<IType>();
final Set<EClass> eClasses = services.getEClasses(receiverType);
if (!eClasses.isEmpty()) {
for (EClass eCls : eClasses) {
EStructuralFeature feature = eCls.getEStructuralFeature(featureName);
if (feature == null) {
result.add(services.nothing(UNKNOWN_FEATURE, featureName, eCls.getName()));
} else {
final EClassifierType featureBasicType = new EClassifierType(queryEnvironment, feature
.getEType());
if (feature.isMany()) {
result.add(new SequenceType(queryEnvironment, featureBasicType));
} else {
result.add(featureBasicType);
}
}
}
} else {
if (receiverType.getType() != null) {
result.add(services.nothing(NON_EOBJECT_FEATURE_ACCESS, featureName, receiverType
.getType().toString()));
} else {
result.add(services.nothing(NON_EOBJECT_FEATURE_ACCESS, featureName, "null"));
}
}
return result;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.acceleo.query.runtime.impl.AbstractService#validateAllType(org.eclipse.acceleo.query.runtime.impl.ValidationServices,
* org.eclipse.acceleo.query.runtime.IReadOnlyQueryEnvironment, java.util.Map)
*/
@Override
public Set<IType> validateAllType(ValidationServices services,
IReadOnlyQueryEnvironment queryEnvironment, Map<List<IType>, Set<IType>> allTypes) {
final Set<IType> result = new LinkedHashSet<IType>();
final Set<IType> knownReceiverTypes = new LinkedHashSet<IType>();
for (Entry<List<IType>, Set<IType>> entry : allTypes.entrySet()) {
if (knownReceiverTypes.add(entry.getKey().get(0))) {
result.addAll(entry.getValue());
}
}
return result;
}
@Override
public List<ICompletionProposal> getProposals(IReadOnlyQueryEnvironment queryEnvironment,
Set<IType> receiverTypes) {
return getEStructuralFeatureProposals(queryEnvironment, receiverTypes);
}
/**
* Gets the {@link List} of {@link EFeatureCompletionProposal} for {@link EStructuralFeature}.
*
* @param receiverTypes
* the receiver types.
* @return the {@link List} of {@link EFeatureCompletionProposal} for {@link EStructuralFeature}
*/
public List<ICompletionProposal> getEStructuralFeatureProposals(
IReadOnlyQueryEnvironment queryEnvironment, Set<IType> receiverTypes) {
final List<ICompletionProposal> result = new ArrayList<ICompletionProposal>();
final Set<EClass> eClasses = new LinkedHashSet<EClass>();
for (IType iType : receiverTypes) {
if (iType.getType() instanceof EClass) {
eClasses.add((EClass)iType.getType());
} else if (iType.getType() instanceof Class<?>) {
final Set<EClassifier> eClassifiers = queryEnvironment.getEPackageProvider()
.getEClassifiers((Class<?>)iType.getType());
if (eClassifiers != null) {
for (EClassifier eClassifier : eClassifiers) {
if (eClassifier instanceof EClass) {
eClasses.add((EClass)eClassifier);
}
}
}
}
}
for (EStructuralFeature feature : queryEnvironment.getEPackageProvider().getEStructuralFeatures(
eClasses)) {
result.add(new EFeatureCompletionProposal(feature));
}
return result;
}
}
/**
* EContainer {@link IService}.
*
* @author <a href="mailto:yvan.lussaud@obeo.fr">Yvan Lussaud</a>
*/
private static final class EContainerService extends FilterService {
/**
* Creates a new service instance given a method and an instance.
*
* @param serviceMethod
* the method that realizes the service
* @param serviceInstance
* the instance on which the service must be called
* @param forWorkspace
* tells if the {@link IService} will be used in a workspace
*/
private EContainerService(Method serviceMethod, Object serviceInstance, boolean forWorkspace) {
super(serviceMethod, serviceInstance, forWorkspace);
}
@Override
public Set<IType> getType(Call call, ValidationServices services, IValidationResult validationResult,
IReadOnlyQueryEnvironment queryEnvironment, List<IType> argTypes) {
final Set<IType> result = new LinkedHashSet<IType>();
final Set<EClass> eClasses = services.getEClasses(argTypes.get(0));
if (!eClasses.isEmpty()) {
for (EClass eCls : eClasses) {
if (eCls == EcorePackage.eINSTANCE.getEObject()) {
if (argTypes.size() == 1) {
result.add(new EClassifierType(queryEnvironment, eCls));
} else if (argTypes.size() == 2) {
result.add(new EClassifierType(queryEnvironment, ((EClassifierLiteralType)argTypes
.get(1)).getType()));
}
} else {
result.addAll(getTypeForSpecificType(services, queryEnvironment, argTypes, eCls));
}
}
} else {
result.add(services.nothing(ONLY_E_CLASS_CAN_BE_CONTAINED_INTO_OTHER_E_CLASSES_NOT_S, argTypes
.get(0)));
}
return result;
}
/**
* Gets the {@link IType} of elements returned by the service when the receiver type is not the
* {@link EObject} {@link EClass}.
*
* @param services
* the {@link ValidationServices}
* @param queryEnvironment
* the {@link IReadOnlyQueryEnvironment}
* @param argTypes
* arguments {@link IType}
* @param receiverEClass
* the receiver type can't be {@link EObject} {@link EClass}
* @return the {@link IType} of elements returned by the service when the receiver type is not the
* {@link EObject} {@link EClass}
*/
private Set<IType> getTypeForSpecificType(ValidationServices services,
IReadOnlyQueryEnvironment queryEnvironment, List<IType> argTypes,
final EClass receiverEClass) {
final Set<IType> result = new LinkedHashSet<IType>();
if (argTypes.size() == 1) {
for (EClass containingEClass : queryEnvironment.getEPackageProvider().getContainingEClasses(
receiverEClass)) {
result.add(new EClassifierType(queryEnvironment, containingEClass));
}
if (result.isEmpty()) {
result.add(services.nothing("%s can't be contained", argTypes.get(0)));
}
} else if (argTypes.size() == 2) {
final IType filterType = argTypes.get(1);
for (EClass containingEClass : queryEnvironment.getEPackageProvider()
.getAllContainingEClasses(receiverEClass)) {
final IType lowerType = services.lower(new EClassifierType(queryEnvironment,
containingEClass), filterType);
if (lowerType != null) {
result.add(lowerType);
}
}
if (result.isEmpty()) {
result.add(services.nothing(S_CAN_T_CONTAIN_DIRECTLY_OR_INDIRECTLY_S, filterType, argTypes
.get(0)));
}
}
return result;
}
}
/**
* EContainerOrSelf {@link IService}.
*
* @author <a href="mailto:yvan.lussaud@obeo.fr">Yvan Lussaud</a>
*/
private static final class EContainerOrSelfService extends FilterService {
/**
* Creates a new service instance given a method and an instance.
*
* @param serviceMethod
* the method that realizes the service
* @param serviceInstance
* the instance on which the service must be called
* @param forWorkspace
* tells if the {@link IService} will be used in a workspace
*/
private EContainerOrSelfService(Method serviceMethod, Object serviceInstance, boolean forWorkspace) {
super(serviceMethod, serviceInstance, forWorkspace);
}
/**
* {@inheritDoc}
*
* @see org.eclipse.acceleo.query.runtime.impl.JavaMethodService#getType(org.eclipse.acceleo.query.ast.Call,
* org.eclipse.acceleo.query.runtime.impl.ValidationServices,
* org.eclipse.acceleo.query.runtime.IValidationResult,
* org.eclipse.acceleo.query.runtime.IReadOnlyQueryEnvironment, java.util.List)
*/
@Override
public Set<IType> getType(Call call, ValidationServices services, IValidationResult validationResult,
IReadOnlyQueryEnvironment queryEnvironment, List<IType> argTypes) {
final Set<IType> result = new LinkedHashSet<IType>();
final Set<EClass> eClasses = services.getEClasses(argTypes.get(0));
if (!eClasses.isEmpty()) {
for (EClass eCls : eClasses) {
if (eCls == EcorePackage.eINSTANCE.getEObject()) {
result.add(new EClassifierType(queryEnvironment, ((EClassifierLiteralType)argTypes
.get(1)).getType()));
} else {
result.addAll(getTypeForSpecificType(services, queryEnvironment, argTypes, eCls));
}
}
} else {
result.add(services.nothing(ONLY_E_CLASS_CAN_BE_CONTAINED_INTO_OTHER_E_CLASSES_NOT_S, argTypes
.get(0)));
}
return result;
}
/**
* Gets the {@link IType} of elements returned by the service when the receiver type is not the
* {@link EObject} {@link EClass}.
*
* @param services
* the {@link ValidationServices}
* @param queryEnvironment
* the {@link IReadOnlyQueryEnvironment}
* @param argTypes
* arguments {@link IType}
* @param receiverEClass
* the receiver type can't be {@link EObject} {@link EClass}
* @return the {@link IType} of elements returned by the service when the receiver type is not the
* {@link EObject} {@link EClass}
*/
private Set<IType> getTypeForSpecificType(ValidationServices services,
IReadOnlyQueryEnvironment queryEnvironment, List<IType> argTypes,
final EClass receiverEClass) {
final Set<IType> result = new LinkedHashSet<IType>();
final IType lowerSelfType = services.lower(argTypes.get(0), argTypes.get(1));
if (lowerSelfType != null) {
result.add(lowerSelfType);
}
final IType filterType = argTypes.get(1);
for (EClass containingEClass : queryEnvironment.getEPackageProvider().getAllContainingEClasses(
receiverEClass)) {
final IType lowerType = services.lower(new EClassifierType(queryEnvironment,
containingEClass), filterType);
if (lowerType != null) {
result.add(lowerType);
}
}
if (result.isEmpty()) {
result.add(services.nothing(S_CAN_T_CONTAIN_DIRECTLY_OR_INDIRECTLY_S, filterType, argTypes
.get(0)));
}
return result;
}
}
/**
* EContents {@link IService}.
*
* @author <a href="mailto:yvan.lussaud@obeo.fr">Yvan Lussaud</a>
*/
private static final class EContentsService extends FilterService {
/**
* Creates a new service instance given a method and an instance.
*
* @param serviceMethod
* the method that realizes the service
* @param serviceInstance
* the instance on which the service must be called
* @param forWorkspace
* tells if the {@link IService} will be used in a workspace
*/
private EContentsService(Method serviceMethod, Object serviceInstance, boolean forWorkspace) {
super(serviceMethod, serviceInstance, forWorkspace);
}
@Override
public Set<IType> getType(Call call, ValidationServices services, IValidationResult validationResult,
IReadOnlyQueryEnvironment queryEnvironment, List<IType> argTypes) {
final Set<IType> result = new LinkedHashSet<IType>();
final Set<EClass> eClasses = services.getEClasses(argTypes.get(0));
if (!eClasses.isEmpty()) {
for (EClass eCls : eClasses) {
if (eCls == EcorePackage.eINSTANCE.getEObject()) {
if (argTypes.size() == 1) {
result.add(new SequenceType(queryEnvironment, new EClassifierType(
queryEnvironment, eCls)));
} else if (argTypes.size() == 2 && argTypes.get(
1) instanceof EClassifierLiteralType) {
result.add(new SequenceType(queryEnvironment, new EClassifierType(
queryEnvironment, ((EClassifierLiteralType)argTypes.get(1)).getType())));
} else if (argTypes.size() == 2 && argTypes.get(
1) instanceof EClassifierSetLiteralType) {
for (EClassifier eClsFilter : ((EClassifierSetLiteralType)argTypes.get(1))
.getEClassifiers()) {
result.add(new SequenceType(queryEnvironment, new EClassifierType(
queryEnvironment, eClsFilter)));
}
} else if (argTypes.size() == 2) {
result.addAll(super.getType(call, services, validationResult, queryEnvironment,
argTypes));
}
} else {
result.addAll(getTypeForSpecificType(services, queryEnvironment, argTypes, eCls));
}
}
} else {
result.add(new SequenceType(queryEnvironment, services.nothing(
"Only EClass can contain other EClasses not %s", argTypes.get(0))));
}
return result;
}
/**
* Gets the {@link IType} of elements returned by the service when the receiver type is not the
* {@link EObject} {@link EClass}.
*
* @param services
* the {@link ValidationServices}
* @param queryEnvironment
* the {@link IReadOnlyQueryEnvironment}
* @param argTypes
* arguments {@link IType}
* @param receiverEClass
* the receiver type can't be {@link EObject} {@link EClass}
* @return the {@link IType} of elements returned by the service when the receiver type is not the
* {@link EObject} {@link EClass}
*/
private Set<IType> getTypeForSpecificType(ValidationServices services,
IReadOnlyQueryEnvironment queryEnvironment, List<IType> argTypes,
final EClass receiverEClass) {
final Set<IType> result = new LinkedHashSet<IType>();
if (argTypes.size() == 1) {
final Set<IType> containedTypes = new LinkedHashSet<IType>();
for (EClass contained : queryEnvironment.getEPackageProvider().getContainedEClasses(
receiverEClass)) {
containedTypes.add(new SequenceType(queryEnvironment, new EClassifierType(
queryEnvironment, contained)));
}
result.addAll(containedTypes);
if (result.isEmpty()) {
result.add(new SequenceType(queryEnvironment, services.nothing(
"%s doesn't contain any other EClass", argTypes.get(0))));
}
} else if (argTypes.size() == 2) {
final Set<IType> filterTypes = new LinkedHashSet<IType>();
if (argTypes.get(1) instanceof EClassifierSetLiteralType) {
for (EClassifier eClassifier : ((EClassifierSetLiteralType)argTypes.get(1))
.getEClassifiers()) {
filterTypes.add(new EClassifierType(queryEnvironment, eClassifier));
}
} else if (argTypes.get(1) instanceof EClassifierLiteralType) {
filterTypes.add(argTypes.get(1));
} else {
final Collection<EClassifier> eObjectEClasses = queryEnvironment.getEPackageProvider()
.getTypes("ecore", "EObject");
for (EClassifier eObjectEClass : eObjectEClasses) {
filterTypes.add(new EClassifierType(queryEnvironment, eObjectEClass));
}
}
for (IType filterType : filterTypes) {
for (EClass containedEClass : queryEnvironment.getEPackageProvider().getContainedEClasses(
receiverEClass)) {
final IType lowerType = services.lower(new EClassifierType(queryEnvironment,
containedEClass), filterType);
if (lowerType != null) {
result.add(new SequenceType(queryEnvironment, lowerType));
}
}
}
if (result.isEmpty()) {
result.add(new SequenceType(queryEnvironment, services.nothing(
"%s can't contain %s directly", argTypes.get(0), argTypes.get(1))));
}
}
return result;
}
}
/**
* AllInstances {@link IService}.
*
* @author <a href="mailto:yvan.lussaud@obeo.fr">Yvan Lussaud</a>
*/
private final class AllInstancesService extends EAllContentsService {
/**
* Creates a new service instance given a method and an instance.
*
* @param serviceMethod
* the method that realizes the service
* @param serviceInstance
* the instance on which the service must be called
* @param forWorkspace
* tells if the {@link IService} will be used in a workspace
*/
private AllInstancesService(Method serviceMethod, Object serviceInstance, boolean forWorkspace) {
super(serviceMethod, serviceInstance, forWorkspace);
}
/**
* {@inheritDoc}
*
* @see org.eclipse.acceleo.query.services.EAllContentsService#getType(org.eclipse.acceleo.query.ast.Call,
* org.eclipse.acceleo.query.runtime.impl.ValidationServices,
* org.eclipse.acceleo.query.runtime.IValidationResult,
* org.eclipse.acceleo.query.runtime.IReadOnlyQueryEnvironment, java.util.List)
*/
@Override
public Set<IType> getType(Call call, ValidationServices services, IValidationResult validationResult,
IReadOnlyQueryEnvironment queryEnv, List<IType> argTypes) {
final Set<IType> result;
if (rootProvider == null) {
result = new LinkedHashSet<IType>();
result.add(new SequenceType(queryEnv, services.nothing(
"No IRootEObjectProvider registered")));
} else {
List<IType> newArgTypes = new ArrayList<IType>(argTypes);
final Collection<EClassifier> eObjectEClasses = queryEnv.getEPackageProvider().getTypes(
"ecore", "EObject");
for (EClassifier eObjectEClass : eObjectEClasses) {
newArgTypes.add(0, new EClassifierType(queryEnv, eObjectEClass));
}
result = super.getType(call, services, validationResult, queryEnv, newArgTypes);
}
return result;
}
}
/**
* EInverse {@link IService}.
*
* @author <a href="mailto:yvan.lussaud@obeo.fr">Yvan Lussaud</a>
*/
private static final class EInverseService extends FilterService {
/**
* Creates a new service instance given a method and an instance.
*
* @param serviceMethod
* the method that realizes the service
* @param serviceInstance
* the instance on which the service must be called
* @param forWorkspace
* tells if the {@link IService} will be used in a workspace
*/
private EInverseService(Method serviceMethod, Object serviceInstance, boolean forWorkspace) {
super(serviceMethod, serviceInstance, forWorkspace);
}
/**
* Creates a new service instance given a method and an instance.
*
* @param serviceMethod
* the method that realizes the service
* @param serviceInstance
* the instance on which the service must be called
* @param filterIndex
* the index of the filtering {@link IType}
* @param forWorkspace
* tells if the {@link IService} will be used in a workspace
* @since 4.0.0
*/
private EInverseService(Method serviceMethod, Object serviceInstance, int filterIndex,
boolean forWorkspace) {
super(serviceMethod, serviceInstance, filterIndex, forWorkspace);
}
@Override
public Set<IType> getType(Call call, ValidationServices services, IValidationResult validationResult,
IReadOnlyQueryEnvironment queryEnvironment, List<IType> argTypes) {
final Set<IType> result = new LinkedHashSet<IType>();
final Set<EClass> eClasses = services.getEClasses(argTypes.get(0));
if (!eClasses.isEmpty()) {
for (EClass eCls : eClasses) {
if (eCls == EcorePackage.eINSTANCE.getEObject()) {
if (argTypes.size() == 1 || !(argTypes.get(1).getType() instanceof EClass)) {
result.add(new SetType(queryEnvironment, new EClassifierType(queryEnvironment,
eCls)));
} else if (argTypes.size() == 2) {
result.add(new SetType(queryEnvironment, new EClassifierType(queryEnvironment,
((EClassifierLiteralType)argTypes.get(1)).getType())));
}
} else {
result.addAll(getTypeForSpecificType(call, services, queryEnvironment, argTypes,
eCls));
}
}
} else {
result.add(new SetType(queryEnvironment, services.nothing(
"Only EClass can have inverse not %s", argTypes.get(0))));
}
return result;
}
/**
* Gets the {@link IType} of elements returned by the service when the receiver type is not the
* {@link EObject} {@link EClass}.
*
* @param call
* the {@link Call}
* @param services
* the {@link ValidationServices}
* @param queryEnvironment
* the {@link IReadOnlyQueryEnvironment}
* @param argTypes
* arguments {@link IType}
* @param receiverEClass
* the receiver type can't be {@link EObject} {@link EClass}
* @return the {@link IType} of elements returned by the service when the receiver type is not the
* {@link EObject} {@link EClass}
*/
private Set<IType> getTypeForSpecificType(Call call, ValidationServices services,
IReadOnlyQueryEnvironment queryEnvironment, List<IType> argTypes,
final EClass receiverEClass) {
final Set<IType> result = new LinkedHashSet<IType>();
final Set<EClass> inverseEClasses = queryEnvironment.getEPackageProvider().getInverseEClasses(
receiverEClass);
if (argTypes.size() == 1 || !(argTypes.get(1).getType() instanceof EClass)) {
result.addAll(getTypeForSpecificTypeNoFilterOrName(call, services, queryEnvironment, argTypes,
inverseEClasses));
} else if (argTypes.size() == 2) {
result.addAll(getTypeForSpecificTypeFilter(services, queryEnvironment, argTypes,
inverseEClasses));
}
return result;
}
/**
* Computes {@link IType} for {@link EObjectServices#eInverse(EObject) eInverse(EObject)} and
* {@link EObjectServices#eInverse(EObject, String) eInverse(EObject, String)}.
*
* @param call
* the {@link Call}
* @param services
* the {@link ValidationServices}
* @param queryEnvironment
* the {@link IReadOnlyQueryEnvironment}
* @param argTypes
* arguments {@link IType}
* @param inverseEClasses
* the {@link Set} of inverse {@link EClass}
* @return the {@link Set} of possible {@link IType}
*/
private Set<IType> getTypeForSpecificTypeNoFilterOrName(Call call, ValidationServices services,
IReadOnlyQueryEnvironment queryEnvironment, List<IType> argTypes,
final Set<EClass> inverseEClasses) {
final Set<IType> result = new LinkedHashSet<IType>();
final String featureName;
if (call.getArguments().size() == 2 && call.getArguments().get(1) instanceof StringLiteral) {
featureName = ((StringLiteral)call.getArguments().get(1)).getValue();
} else {
featureName = null;
}
for (EClass inverseEClass : inverseEClasses) {
if (featureName == null || inverseEClass.getEStructuralFeature(featureName) != null) {
result.add(new SetType(queryEnvironment, new EClassifierType(queryEnvironment,
inverseEClass)));
}
}
if (result.isEmpty()) {
result.add(new SetType(queryEnvironment, services.nothing("%s don't have inverse", argTypes
.get(0))));
}
return result;
}
/**
* Computes {@link IType} for {@link EObjectServices#eInverse(EObject, EClassifier) eInverse(EObject,
* EClassifier)}.
*
* @param services
* the {@link ValidationServices}
* @param queryEnvironment
* the {@link IReadOnlyQueryEnvironment}
* @param argTypes
* arguments {@link IType}
* @param inverseEClasses
* the {@link Set} of inverse {@link EClass}
* @return the {@link Set} of possible {@link IType}
*/
private Set<IType> getTypeForSpecificTypeFilter(ValidationServices services,
IReadOnlyQueryEnvironment queryEnvironment, List<IType> argTypes,
final Set<EClass> inverseEClasses) {
final Set<IType> result = new LinkedHashSet<IType>();
final IType filterType = argTypes.get(1);
for (EClass inverseEClass : inverseEClasses) {
final IType lowerType = services.lower(new EClassifierType(queryEnvironment, inverseEClass),
filterType);
if (lowerType != null) {
result.add(new SetType(queryEnvironment, lowerType));
}
}
if (result.isEmpty()) {
result.add(new SetType(queryEnvironment, services.nothing("%s don't have inverse to %s",
argTypes.get(0), filterType)));
}
return result;
}
}
/**
* EGet {@link IService}.
*
* @author <a href="mailto:yvan.lussaud@obeo.fr">Yvan Lussaud</a>
*/
private static final class EGetService extends JavaMethodService {
/**
* Creates a new service instance given a method and an instance.
*
* @param method
* the method that realizes the service
* @param serviceInstance
* the instance on which the service must be called
* @param forWorkspace
* tells if the {@link IService} will be used in a workspace
*/
EGetService(Method method, Object serviceInstance, boolean forWorkspace) {
super(method, serviceInstance, forWorkspace);
}
/**
* {@inheritDoc}
*
* @see org.eclipse.acceleo.query.runtime.impl.JavaMethodService#getType(org.eclipse.acceleo.query.ast.Call,
* org.eclipse.acceleo.query.runtime.impl.ValidationServices,
* org.eclipse.acceleo.query.runtime.IValidationResult,
* org.eclipse.acceleo.query.runtime.IReadOnlyQueryEnvironment, java.util.List)
*/
@Override
public Set<IType> getType(Call call, ValidationServices services, IValidationResult validationResult,
IReadOnlyQueryEnvironment queryEnvironment, List<IType> argTypes) {
final Set<IType> result = new LinkedHashSet<IType>();
if (call.getArguments().get(1) instanceof StringLiteral) {
final String featureName = ((StringLiteral)call.getArguments().get(1)).getValue();
final EClass eCls = (EClass)argTypes.get(0).getType();
final EStructuralFeature feature = eCls.getEStructuralFeature(featureName);
if (feature != null) {
if (feature.isMany()) {
result.add(new SetType(queryEnvironment, new EClassifierType(queryEnvironment, feature
.getEType())));
} else {
result.add(new EClassifierType(queryEnvironment, feature.getEType()));
}
} else {
result.add(services.nothing("EStructuralFeature %s not found for %s", featureName,
argTypes.get(0)));
}
} else {
result.add(new ClassType(queryEnvironment, Object.class));
}
return result;
}
}
/**
* The cross referencer needed to realize the service eInverse().
*/
private final CrossReferenceProvider crossReferencer;
/**
* The root provider needed to realize the service allInstances().
*/
private final IRootEObjectProvider rootProvider;
/**
* The {@link IReadOnlyQueryEnvironment}.
*/
private final IReadOnlyQueryEnvironment queryEnvironment;
/**
* Constructor.
*
* @param queryEnvironment
* the {@link IReadOnlyQueryEnvironment}
* @param crossReferencer
* the cross referencer needed to realize the service eInverse()
* @param rootProvider
* the root provider needed to realize the service allInstances()
*/
public EObjectServices(IReadOnlyQueryEnvironment queryEnvironment, CrossReferenceProvider crossReferencer,
IRootEObjectProvider rootProvider) {
this.queryEnvironment = queryEnvironment;
this.crossReferencer = crossReferencer;
this.rootProvider = rootProvider;
}
@Override
protected IService<Method> getService(Method publicMethod, boolean forWorkspace) {
final IService<Method> result;
if ("eContents".equals(publicMethod.getName())) {
result = new EContentsService(publicMethod, this, forWorkspace);
} else if ("eAllContents".equals(publicMethod.getName())) {
result = new EAllContentsService(publicMethod, this, forWorkspace);
} else if ("eContainer".equals(publicMethod.getName())) {
result = new EContainerService(publicMethod, this, forWorkspace);
} else if ("eContainerOrSelf".equals(publicMethod.getName())) {
result = new EContainerOrSelfService(publicMethod, this, forWorkspace);
} else if ("eInverse".equals(publicMethod.getName())) {
if (publicMethod.getParameterTypes().length == 2 && publicMethod
.getParameterTypes()[1] == String.class) {
// no filter for eInverse(EObject, String)
result = new EInverseService(publicMethod, this, 10, forWorkspace);
} else {
result = new EInverseService(publicMethod, this, forWorkspace);
}
} else if ("allInstances".equals(publicMethod.getName())) {
result = new AllInstancesService(publicMethod, this, forWorkspace);
} else if (AstBuilderListener.FEATURE_ACCESS_SERVICE_NAME.equals(publicMethod.getName())) {
result = new EObjectFeatureAccess(publicMethod, this, forWorkspace);
} else if ("eGet".equals(publicMethod.getName())) {
result = new EGetService(publicMethod, this, forWorkspace);
} else {
result = new JavaMethodService(publicMethod, this, forWorkspace);
}
return result;
}
// @formatter:off
@Documentation(
value = "Returns a sequence of the EObjects recursively contained in the specified root eObject.",
params = {
@Param(name = "eObject", value = "The root of the content tree")
},
result = "The recursive content of the specified eObject.",
examples = {
@Example(
expression = "anEPackage.eAllContents()",