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HermiT is reasoner for ontologies written using the Web Ontology Language (OWL). Given an OWL file, HermiT can determine whether or not the ontology is consistent, identify subsumption relationships between classes, and much more.
This is the maven build of HermiT and is designed for people who wish to use HermiT from within the OWL API. It is now versioned in the main HermiT version repository, although not officially supported by the HermiT developers.
The version number of this package is a composite of the HermiT version and a value representing the OWLAPI release it is compatible with. Note that the group id for the upstream HermiT is com.hermit-reasoner, while this fork is released under net.sourceforge.owlapi.
This fork exists to allow HermiT users to use newer OWLAPI versions than the ones supported by the original HermiT codebase.
This package includes the Jautomata library (http://jautomata.sourceforge.net/), and builds with it directly. This library appears to be no longer under active development, and so a "fork" seems appropriate. No development is intended or anticipated on this code base.
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/* Copyright 2008, 2009, 2010 by the Oxford University Computing Laboratory
This file is part of HermiT.
HermiT is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
HermiT 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with HermiT. If not, see m_indicesByBranchingPoint.length) {
int newSize=m_indicesByBranchingPoint.length*3/2;
while (requiredSize>newSize)
newSize=newSize*3/2;
int[] newIndicesByBranchingPoint=new int[newSize];
System.arraycopy(m_indicesByBranchingPoint,0,newIndicesByBranchingPoint,0,m_indicesByBranchingPoint.length);
m_indicesByBranchingPoint=newIndicesByBranchingPoint;
}
m_indicesByBranchingPoint[start]=m_afterExtensionOldTupleIndex;
m_indicesByBranchingPoint[start+1]=m_afterExtensionThisTupleIndex;
m_indicesByBranchingPoint[start+2]=m_afterDeltaNewTupleIndex;
}
/**
* Backtrack.
*/
public void backtrack() {
int start=m_tableau.getCurrentBranchingPoint().m_level*3;
int newAfterDeltaNewTupleIndex=m_indicesByBranchingPoint[start+2];
for (int tupleIndex=m_afterDeltaNewTupleIndex-1;tupleIndex>=newAfterDeltaNewTupleIndex;--tupleIndex) {
removeTuple(tupleIndex);
m_dependencySetManager.forgetDependencySet(tupleIndex);
m_tupleTable.nullifyTuple(tupleIndex);
}
m_tupleTable.truncate(newAfterDeltaNewTupleIndex);
m_afterExtensionOldTupleIndex=m_indicesByBranchingPoint[start];
m_afterExtensionThisTupleIndex=m_indicesByBranchingPoint[start+1];
m_afterDeltaNewTupleIndex=newAfterDeltaNewTupleIndex;
}
protected abstract void removeTuple(int tupleIndex);
protected void postRemove(Object[] tuple,int tupleIndex) {
Object dlPredicateObject=tuple[0];
if (dlPredicateObject instanceof Concept) {
Node node=(Node)tuple[1];
m_tableau.m_existentialExpansionStrategy.assertionRemoved((Concept)dlPredicateObject,node,m_coreManager.isCore(tupleIndex));
if (dlPredicateObject instanceof AtomicConcept)
node.m_numberOfPositiveAtomicConcepts--;
else if (dlPredicateObject instanceof ExistentialConcept)
node.removeFromUnprocessedExistentials((ExistentialConcept)dlPredicateObject);
else if (dlPredicateObject instanceof AtomicNegationConcept)
node.m_numberOfNegatedAtomicConcepts--;
}
else if (dlPredicateObject instanceof AtomicRole)
m_tableau.m_existentialExpansionStrategy.assertionRemoved((AtomicRole)dlPredicateObject,(Node)tuple[1],(Node)tuple[2],m_coreManager.isCore(tupleIndex));
else if (dlPredicateObject instanceof NegatedAtomicRole)
((Node)tuple[1]).m_numberOfNegatedRoleAssertions--;
else if (dlPredicateObject instanceof DescriptionGraph)
m_tableau.m_descriptionGraphManager.descriptionGraphTupleRemoved(tupleIndex,tuple);
if (m_tableauMonitor!=null)
m_tableauMonitor.tupleRemoved(tuple);
}
/**
* Clear.
*/
public void clear() {
m_tupleTable.clear();
m_afterExtensionOldTupleIndex=0;
m_afterExtensionThisTupleIndex=0;
m_afterDeltaNewTupleIndex=0;
}
/**
* @param tuple tuple
* @return true if tuple active
*/
public boolean isTupleActive(Object[] tuple) {
for (int objectIndex=m_tupleArity-1;objectIndex>0;--objectIndex)
if (!((Node)tuple[objectIndex]).isActive())
return false;
return true;
}
/**
* @param tupleIndex tupleIndex
* @return true if tuple active
*/
public boolean isTupleActive(int tupleIndex) {
for (int objectIndex=m_tupleArity-1;objectIndex>0;--objectIndex)
if (!((Node)m_tupleTable.getTupleObject(tupleIndex,objectIndex)).isActive())
return false;
return true;
}
/**
* Retrieval.
*/
public interface Retrieval {
/**
* @return extension table
*/
ExtensionTable getExtensionTable();
/**
* @return extension view
*/
View getExtensionView();
/**
* Clear.
*/
void clear();
/**
* @return binding positions
*/
int[] getBindingPositions();
/**
* @return bindings buffers
*/
Object[] getBindingsBuffer();
/**
* @return tuple buffers
*/
Object[] getTupleBuffer();
/**
* @return dependency set
*/
DependencySet getDependencySet();
/**
* @return is core
*/
boolean isCore();
/**
* Open.
*/
void open();
/**
* @return after last
*/
boolean afterLast();
/**
* @return current tuple index
*/
int getCurrentTupleIndex();
/**
* Next.
*/
void next();
}
protected class UnindexedRetrieval implements Retrieval,Serializable {
private static final long serialVersionUID=6395072458663267969L;
protected final ExtensionTable.View m_extensionView;
protected final int[] m_bindingPositions;
protected final Object[] m_bindingsBuffer;
protected final Object[] m_tupleBuffer;
protected final boolean m_ownsBuffers;
protected final boolean m_checkTupleSelection;
protected int m_currentTupleIndex;
protected int m_afterLastTupleIndex;
public UnindexedRetrieval(int[] bindingPositions,Object[] bindingsBuffer,Object[] tupleBuffer,boolean ownsBuffers,ExtensionTable.View extensionView) {
m_bindingPositions=bindingPositions;
m_extensionView=extensionView;
m_bindingsBuffer=bindingsBuffer;
m_tupleBuffer=tupleBuffer;
m_ownsBuffers=ownsBuffers;
int numberOfBoundPositions=0;
for (int index=m_bindingPositions.length-1;index>=0;--index)
if (m_bindingPositions[index]!=-1)
numberOfBoundPositions++;
m_checkTupleSelection=(numberOfBoundPositions>0);
}
@Override
public ExtensionTable getExtensionTable() {
return ExtensionTable.this;
}
@Override
public ExtensionTable.View getExtensionView() {
return m_extensionView;
}
@Override
public void clear() {
if (m_ownsBuffers) {
for (int index=m_bindingsBuffer.length-1;index>=0;--index)
m_bindingsBuffer[index]=null;
for (int index=m_tupleBuffer.length-1;index>=0;--index)
m_tupleBuffer[index]=null;
}
}
@Override
public int[] getBindingPositions() {
return m_bindingPositions;
}
@Override
public Object[] getBindingsBuffer() {
return m_bindingsBuffer;
}
@Override
public Object[] getTupleBuffer() {
return m_tupleBuffer;
}
@Override
public DependencySet getDependencySet() {
return m_dependencySetManager.getDependencySet(m_currentTupleIndex);
}
@Override
public boolean isCore() {
return m_coreManager.isCore(m_currentTupleIndex);
}
@Override
public void open() {
switch (m_extensionView) {
case EXTENSION_THIS:
m_currentTupleIndex=0;
m_afterLastTupleIndex=m_afterExtensionThisTupleIndex;
break;
case EXTENSION_OLD:
m_currentTupleIndex=0;
m_afterLastTupleIndex=m_afterExtensionOldTupleIndex;
break;
case DELTA_OLD:
m_currentTupleIndex=m_afterExtensionOldTupleIndex;
m_afterLastTupleIndex=m_afterExtensionThisTupleIndex;
break;
case TOTAL:
m_currentTupleIndex=0;
m_afterLastTupleIndex=m_afterDeltaNewTupleIndex;
break;
default:
break;
}
while (m_currentTupleIndex=m_afterLastTupleIndex;
}
@Override
public int getCurrentTupleIndex() {
return m_currentTupleIndex;
}
@Override
public void next() {
if (m_currentTupleIndex=0;--index)
if (m_bindingPositions[index]!=-1 && !m_tupleBuffer[index].equals(m_bindingsBuffer[m_bindingPositions[index]]))
return false;
return true;
}
}
protected interface DependencySetManager {
DependencySet getDependencySet(int tupleIndex);
void setDependencySet(int tupleIndex,DependencySet dependencySet);
void forgetDependencySet(int tupleIndex);
}
protected static class DeterministicDependencySetManager implements DependencySetManager,Serializable {
private static final long serialVersionUID=7982627098607954806L;
protected final DependencySetFactory m_dependencySetFactory;
public DeterministicDependencySetManager(ExtensionTable extensionTable) {
m_dependencySetFactory=extensionTable.m_tableau.getDependencySetFactory();
}
@Override
public DependencySet getDependencySet(int tupleIndex) {
return m_dependencySetFactory.emptySet();
}
@Override
public void setDependencySet(int tupleIndex,DependencySet dependencySet) {
// nothing to do
}
@Override
public void forgetDependencySet(int tupleIndex) {
// nothing to do
}
}
protected class LastObjectDependencySetManager implements DependencySetManager,Serializable {
private static final long serialVersionUID=-8097612469749016470L;
protected final DependencySetFactory m_dependencySetFactory;
public LastObjectDependencySetManager(ExtensionTable extensionTable) {
m_dependencySetFactory=extensionTable.m_tableau.getDependencySetFactory();
}
@Override
public DependencySet getDependencySet(int tupleIndex) {
return (DependencySet)m_tupleTable.getTupleObject(tupleIndex,m_tupleArity);
}
@Override
public void setDependencySet(int tupleIndex,DependencySet dependencySet) {
PermanentDependencySet permanentDependencySet=m_dependencySetFactory.getPermanent(dependencySet);
m_tupleTable.setTupleObject(tupleIndex,m_tupleArity,permanentDependencySet);
m_dependencySetFactory.addUsage(permanentDependencySet);
}
@Override
public void forgetDependencySet(int tupleIndex) {
PermanentDependencySet permanentDependencySet=(PermanentDependencySet)m_tupleTable.getTupleObject(tupleIndex,m_tupleArity);
m_dependencySetFactory.removeUsage(permanentDependencySet);
}
}
protected interface CoreManager {
boolean isCore(int tupleIndex);
void addCore(int tupleIndex);
void setCore(int tupleIndex,boolean isCore);
}
protected static class NoCoreManager implements CoreManager,Serializable {
private static final long serialVersionUID=3252994135060928432L;
@Override
public boolean isCore(int tupleIndex) {
return true;
}
@Override
public void addCore(int tupleIndex) {
// nothing to do
}
@Override
public void setCore(int tupleIndex,boolean isCore) {
// nothing to do
}
}
protected static class RealCoreManager implements CoreManager,Serializable {
private static final long serialVersionUID=3276377301185845284L;
protected int[] m_bits;
public RealCoreManager() {
m_bits=new int[TupleTable.PAGE_SIZE/32];
}
@Override
public boolean isCore(int tupleIndex) {
int frameIndex=tupleIndex/32;
int mask=1 << (tupleIndex % 32);
return (m_bits[frameIndex] & mask)!=0;
}
@Override
public void addCore(int tupleIndex) {
int frameIndex=tupleIndex/32;
int mask=1 << (tupleIndex % 32);
m_bits[frameIndex]|=mask;
}
@Override
public void setCore(int tupleIndex,boolean isCore) {
int frameIndex=tupleIndex/32;
int mask=1 << (tupleIndex % 32);
if (frameIndex>=m_bits.length) {
int newSize=3*m_bits.length/2;
while (frameIndex>=newSize)
newSize=3*newSize/2;
int[] newBits=new int[newSize];
System.arraycopy(m_bits,0,newBits,0,m_bits.length);
m_bits=newBits;
}
if (isCore)
m_bits[frameIndex]|=mask;
else
m_bits[frameIndex]&=~mask;
}
}
}