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AbstractDescriptor.java
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AbstractDescriptor.java
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/**
* Copyright (C) 2020 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 java.net.URI;
import java.util.Collections;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
/**
* Defines base descriptor, which is used to specify context information for entities and their fields.
* <p>
* The descriptor hierarchy is a classical <b>Composite</b> pattern.
*/
public abstract class AbstractDescriptor implements Descriptor {
protected final Set<URI> contexts = new HashSet<>(4);
protected final boolean assertionsInSubjectContext;
private String language;
private boolean hasLanguage;
protected AbstractDescriptor() {
this(true);
}
protected AbstractDescriptor(boolean assertionsInSubjectContext) {
this.assertionsInSubjectContext = assertionsInSubjectContext;
}
protected AbstractDescriptor(URI context) {
this(context, true);
}
protected AbstractDescriptor(URI context, boolean assertionsInSubjectContext) {
if (context != null) {
contexts.add(context);
}
this.assertionsInSubjectContext = assertionsInSubjectContext;
}
@Override
public Set<URI> getContexts() {
return Collections.unmodifiableSet(contexts);
}
@Override
public Descriptor addContext(URI context) {
if (context == null) {
contexts.clear();
} else {
contexts.add(context);
}
return this;
}
@Override
public String getLanguage() {
return language;
}
@Override
public boolean hasLanguage() {
return hasLanguage;
}
@Override
public Descriptor setLanguage(String languageTag) {
this.language = languageTag;
this.hasLanguage = true;
return this;
}
@Override
public Descriptor anyLanguage() {
return setLanguage(null);
}
@Override
public boolean areAssertionsInSubjectContext() {
return assertionsInSubjectContext;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof AbstractDescriptor)) {
return false;
}
AbstractDescriptor that = (AbstractDescriptor) o;
if (hasLanguage != that.hasLanguage) {
return false;
}
if (assertionsInSubjectContext != that.assertionsInSubjectContext) {
return false;
}
return Objects.equals(contexts, that.contexts) && Objects.equals(language, that.language);
}
@Override
public int hashCode() {
int result = contexts.hashCode();
result = 31 * result + (language != null ? language.hashCode() : 0);
result = 31 * result + (hasLanguage ? 1 : 0);
result = 31 * result + (assertionsInSubjectContext ? 1 : 0);
return result;
}
@Override
public String toString() {
return contexts.isEmpty() ? "default_context" : contexts.toString();
}
}