Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/* This file is part of the OWL API.
* The contents of this file are subject to the LGPL License, Version 3.0.
* Copyright 2014, The University of Manchester
*
* 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/.
*
* Alternatively, the contents of this file may be used under the terms of the Apache License, Version 2.0 in which case, the provisions of the Apache License Version 2.0 are applicable instead of those above.
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */
package uk.ac.manchester.cs.owl.owlapi;
import java.lang.ref.WeakReference;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.inject.Inject;
import org.semanticweb.owlapi.model.*;
import org.semanticweb.owlapi.util.WeakIndexCache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.common.collect.Interner;
import com.google.common.collect.Interners;
/**
* @author ignazio
*/
public class OWLDataFactoryInternalsImpl extends OWLDataFactoryInternalsImplNoCache {
private static Logger logger = LoggerFactory.getLogger(OWLDataFactoryInternalsImpl.class);
private static final long serialVersionUID = 40000L;
protected class BuildableWeakIndexCache extends
WeakIndexCache {
private static final long serialVersionUID = 40000L;
@Nonnull
public V cache(@Nonnull IRI s, @Nonnull Buildable v) {
WeakReference w = prefixCache.get(s);
if (w != null) {
V toReturn = w.get();
if (toReturn != null) {
return toReturn;
}
}
// need to add the new key and return it
@SuppressWarnings("unchecked")
V value = (V) v.build(s);
prefixCache.put(s, new WeakReference<>(value));
return value;
}
}
@Nonnull
private final BuildableWeakIndexCache classesByURI;
@Nonnull
private final BuildableWeakIndexCache objectPropertiesByURI;
@Nonnull
private final BuildableWeakIndexCache dataPropertiesByURI;
@Nonnull
private final BuildableWeakIndexCache datatypesByURI;
@Nonnull
private final BuildableWeakIndexCache individualsByURI;
@Nonnull
private final BuildableWeakIndexCache annotationPropertiesByURI;
@Nonnull
transient final private Interner languageTagInterner;
@Nonnull
protected final BuildableWeakIndexCache buildCache() {
return new BuildableWeakIndexCache<>();
}
/**
* Annotations Cache uses a loading cache as a size limited Interner; the
* value of the loader is simply the key. As with an interner, each access
* constructs a new object that is discarded if the key is used. Most
* annotations will only be used once; however some annotations may be
* reused extremely frequently. for ontologies in the OBO family, a few
* annotations will be reused extremely frequently.
*/
private transient final LoadingCache annotationsCache;
/**
* @param useCompression
* true if literals should be compressed
*/
@Inject
public OWLDataFactoryInternalsImpl(@CompressionEnabled boolean useCompression) {
super(useCompression);
classesByURI = buildCache();
objectPropertiesByURI = buildCache();
dataPropertiesByURI = buildCache();
datatypesByURI = buildCache();
individualsByURI = buildCache();
annotationPropertiesByURI = buildCache();
languageTagInterner = Interners.newWeakInterner();
CacheBuilder annotationsCacheBuilder = CacheBuilder.newBuilder().maximumSize(512)
.expireAfterAccess(2, TimeUnit.MINUTES);
if (logger.isDebugEnabled()) {
annotationsCacheBuilder.recordStats();
}
annotationsCache = annotationsCacheBuilder.build(new CacheLoader() {
@Override
public OWLAnnotation load(OWLAnnotation key) {
return key;
}
});
}
@SuppressWarnings("unchecked")
protected enum Buildable {
OWLCLASS {
@Nonnull
@Override
OWLClass build(@Nonnull IRI iri) {
return new OWLClassImpl(iri);
}
},
OWLOBJECTPROPERTY {
@Nonnull
@Override
OWLObjectProperty build(@Nonnull IRI iri) {
return new OWLObjectPropertyImpl(iri);
}
},
OWLDATAPROPERTY {
@Nonnull
@Override
OWLDataProperty build(@Nonnull IRI iri) {
return new OWLDataPropertyImpl(iri);
}
},
OWLNAMEDINDIVIDUAL {
@Nonnull
@Override
OWLNamedIndividual build(@Nonnull IRI iri) {
return new OWLNamedIndividualImpl(iri);
}
},
OWLDATATYPE {
@Nonnull
@Override
OWLDatatype build(@Nonnull IRI iri) {
return new OWLDatatypeImpl(iri);
}
},
OWLANNOTATIONPROPERTY {
@Nonnull
@Override
OWLAnnotationProperty build(@Nonnull IRI iri) {
return new OWLAnnotationPropertyImpl(iri);
}
};
@Nonnull
abstract K build(@Nonnull IRI iri);
}
@Nonnull
@Override
public OWLClass getOWLClass(IRI iri) {
return classesByURI.cache(iri, Buildable.OWLCLASS);
}
@Override
public void purge() {
classesByURI.clear();
objectPropertiesByURI.clear();
dataPropertiesByURI.clear();
datatypesByURI.clear();
individualsByURI.clear();
annotationPropertiesByURI.clear();
annotationsCache.invalidateAll();
}
@Nonnull
@Override
public OWLObjectProperty getOWLObjectProperty(IRI iri) {
return objectPropertiesByURI.cache(iri, Buildable.OWLOBJECTPROPERTY);
}
@Nonnull
@Override
public OWLDataProperty getOWLDataProperty(IRI iri) {
return dataPropertiesByURI.cache(iri, Buildable.OWLDATAPROPERTY);
}
@Nonnull
@Override
public OWLNamedIndividual getOWLNamedIndividual(IRI iri) {
return individualsByURI.cache(iri, Buildable.OWLNAMEDINDIVIDUAL);
}
@Nonnull
@Override
public OWLDatatype getOWLDatatype(IRI iri) {
return datatypesByURI.cache(iri, Buildable.OWLDATATYPE);
}
@Nonnull
@Override
public OWLAnnotationProperty getOWLAnnotationProperty(IRI iri) {
return annotationPropertiesByURI.cache(iri,
Buildable.OWLANNOTATIONPROPERTY);
}
/*
Use a guava weak String interner for language tags.
*/
@Override
public OWLLiteral getOWLLiteral(String literal, @Nullable String lang) {
if (lang == null) {
lang = "";
}
lang = languageTagInterner.intern(lang.trim().toLowerCase());
return super.getOWLLiteral(literal, lang);
}
private AtomicInteger annotationsCount = new AtomicInteger(0);
@Override
public OWLAnnotation getOWLAnnotation(OWLAnnotationProperty property, OWLAnnotationValue value,
@Nonnull Set annotations) {
OWLAnnotation key = new OWLAnnotationImpl(property, value, annotations);
try {
OWLAnnotation annotation = annotationsCache.get(key);
if (logger.isDebugEnabled()) {
int n = annotationsCount.incrementAndGet();
if (n % 1000 == 0) {
logger.debug("{}: Annotations Cache stats: {}", n, annotationsCache.stats());
}
}
return annotation;
} catch (ExecutionException e) {
return key;
}
}
}
