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FieldDescriptor.java
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FieldDescriptor.java
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/**
* Copyright (C) 2019 Czech Technical University in Prague
* <p>
* 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.
* <p>
* 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.FieldSpecification;
import java.lang.reflect.Field;
import java.net.URI;
import java.util.Collection;
import java.util.Collections;
import java.util.Objects;
import java.util.Set;
/**
* Describes a singular data property or a plural data, object or annotation property field.
*/
public class FieldDescriptor extends Descriptor {
private final Field field;
public FieldDescriptor(Field attribute) {
this.field = Objects.requireNonNull(attribute);
}
public FieldDescriptor(URI context, Field attribute) {
super(context);
this.field = Objects.requireNonNull(attribute);
}
@Override
public Collection<Descriptor> getAttributeDescriptors() {
return Collections.singleton(this);
}
@Override
public Descriptor getAttributeDescriptor(FieldSpecification<?, ?> attribute) {
return getFieldDescriptor(attribute.getJavaField());
}
@Override
public URI getAttributeContext(FieldSpecification<?, ?> attribute) {
return context;
}
@Override
public FieldDescriptor addAttributeDescriptor(Field attribute, Descriptor descriptor) {
// Do nothing
return this;
}
@Override
public FieldDescriptor addAttributeContext(Field attribute, URI context) {
// Do nothing
return this;
}
/**
* Use {@link #setLanguage(String)} instead.
*/
@Override
public FieldDescriptor setAttributeLanguage(Field attribute, String languageTag) {
// Do nothing
return this;
}
private Descriptor getFieldDescriptor(Field field) {
if (this.field.equals(field)) {
return this;
}
throw new IllegalArgumentException("This field descriptor does not describe field " + field);
}
@Override
protected Set<URI> getContextsInternal(Set<URI> contexts, Set<Descriptor> visited) {
if (context == null) {
return null;
}
contexts.add(context);
visited.add(this);
return contexts;
}
Field getField() {
return field;
}
@Override
protected boolean overridesAssertionsInSubjectContext() {
return true;
}
@Override
public int hashCode() {
final int prime = 31;
int result = super.hashCode();
result = prime * result + field.hashCode();
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (!super.equals(obj))
return false;
if (getClass() != obj.getClass())
return false;
FieldDescriptor other = (FieldDescriptor) obj;
return field.equals(other.field);
}
}