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EntityDescriptor.java
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EntityDescriptor.java
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/**
* Copyright (C) 2022 Czech Technical University in Prague
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jopa.model.descriptors;
import cz.cvut.kbss.jopa.model.metamodel.Attribute;
import cz.cvut.kbss.jopa.model.metamodel.Attribute.PersistentAttributeType;
import cz.cvut.kbss.jopa.model.metamodel.FieldSpecification;
import cz.cvut.kbss.jopa.model.metamodel.QueryAttribute;
import cz.cvut.kbss.jopa.utils.ErrorUtils;
import java.lang.reflect.Field;
import java.net.URI;
import java.util.*;
import java.util.Map.Entry;
/**
* Describes an entity.
* <p>
* Each attribute has a descriptor associated with it.
*/
public class EntityDescriptor extends AbstractDescriptor {
private final Map<Field, Descriptor> fieldDescriptors;
public EntityDescriptor() {
this.fieldDescriptors = new HashMap<>();
}
/**
* Allows to configure where object property assertions should be stored
*
* @param assertionsInSubjectContext Whether object property assertions are stored in the subject's. Defaults to
* {@code true}. If {@code false}, object property assertions are stored in the
* object's context
* @see #areAssertionsInSubjectContext()
*/
public EntityDescriptor(boolean assertionsInSubjectContext) {
super(assertionsInSubjectContext);
this.fieldDescriptors = new HashMap<>();
}
public EntityDescriptor(URI context) {
super(context);
this.fieldDescriptors = new HashMap<>();
}
public EntityDescriptor(Set<URI> contexts) {
this();
this.contexts.addAll(Objects.requireNonNull(contexts));
}
public EntityDescriptor(URI context, boolean assertionsInSubjectContext) {
super(context, assertionsInSubjectContext);
this.fieldDescriptors = new HashMap<>();
}
@Override
public EntityDescriptor addAttributeDescriptor(FieldSpecification<?, ?> attribute, Descriptor descriptor) {
Objects.requireNonNull(attribute, ErrorUtils.getNPXMessageSupplier("attribute"));
Objects.requireNonNull(descriptor, ErrorUtils.getNPXMessageSupplier("descriptor"));
fieldDescriptors.put(attribute.getJavaField(), descriptor);
return this;
}
@Override
public EntityDescriptor addAttributeContext(FieldSpecification<?, ?> attribute, URI context) {
Objects.requireNonNull(attribute, ErrorUtils.getNPXMessageSupplier("attribute"));
fieldDescriptors.putIfAbsent(attribute.getJavaField(),
createDescriptor(attribute, context != null ? Collections.singleton(context) : Collections.emptySet()));
fieldDescriptors.get(attribute.getJavaField()).addContext(context);
return this;
}
@Override
public EntityDescriptor setLanguage(String languageTag) {
super.setLanguage(languageTag);
fieldDescriptors.values().forEach(d -> d.setLanguage(languageTag));
return this;
}
@Override
public EntityDescriptor setAttributeLanguage(FieldSpecification<?, ?> attribute, String languageTag) {
Objects.requireNonNull(attribute);
fieldDescriptors.putIfAbsent(attribute.getJavaField(), createDescriptor(attribute, getContexts()));
fieldDescriptors.get(attribute.getJavaField()).setLanguage(languageTag);
return this;
}
@Override
public Descriptor getAttributeDescriptor(FieldSpecification<?, ?> attribute) {
Objects.requireNonNull(attribute);
Descriptor d = fieldDescriptors.get(attribute.getJavaField());
if (d == null) {
d = createDescriptor(attribute, getContexts());
if (hasLanguage()) {
d.setLanguage(getLanguage());
}
}
return d;
}
@Override
public Set<URI> getAttributeContexts(FieldSpecification<?, ?> attribute) {
Objects.requireNonNull(attribute);
final Descriptor attDescriptor = getAttributeDescriptor(attribute);
return attDescriptor.overridesAssertionContext() || !assertionsInSubjectContext ?
attDescriptor.getContexts() : getContexts();
}
@Override
public Collection<Descriptor> getAttributeDescriptors() {
return Collections.unmodifiableCollection(fieldDescriptors.values());
}
private static AbstractDescriptor createDescriptor(FieldSpecification<?, ?> att, Set<URI> contexts) {
if (att instanceof Attribute) {
final Attribute<?, ?> attSpec = (Attribute<?, ?>) att;
if (attSpec.getPersistentAttributeType() == PersistentAttributeType.OBJECT) {
if (attSpec.isCollection()) {
return new ObjectPropertyCollectionDescriptor(contexts, att);
} else {
return new EntityDescriptor(contexts);
}
}
} else if (att instanceof QueryAttribute) {
return new EntityDescriptor(contexts);
}
return new FieldDescriptor(contexts, att);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof EntityDescriptor)) {
return false;
}
if (!super.equals(o)) {
return false;
}
EntityDescriptor that = (EntityDescriptor) o;
if (fieldDescriptors.size() != that.fieldDescriptors.size()) {
return false;
}
for (Entry<Field, Descriptor> e : fieldDescriptors.entrySet()) {
if (e.getValue() == null) {
if (that.fieldDescriptors.containsKey(e.getKey()) && that.fieldDescriptors.get(e.getKey()) != null) {
return false;
}
} else {
if (e.getValue() == this && that.fieldDescriptors.get(e.getKey()) == that) {
continue;
}
if (!e.getValue().equals(that.fieldDescriptors.get(e.getKey()))) {
return false;
}
}
}
return true;
}
@Override
public int hashCode() {
int result = super.hashCode();
result = 31 * result + fieldDescriptors.entrySet().stream()
.map(e -> e.getKey().hashCode() ^
(e.getValue() == this ? 0 :
e.getValue().hashCode())).reduce(0, Integer::sum);
return result;
}
}