/**
* JTIference.java
* ----------------------------------------------------------------------------------
*
* Copyright (C) 2008 www.integratedmodelling.org
* Created: Feb 19, 2008
*
* ----------------------------------------------------------------------------------
* This file is part of RiskWiz.
*
* RiskWiz 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.
*
* RiskWiz 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 the software; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* ----------------------------------------------------------------------------------
*
* @copyright 2008 www.integratedmodelling.org
* @author Sergey Krivov
* @date Feb 19, 2008
* @license http://www.gnu.org/licenses/gpl.txt GNU General Public License v3
* @link http://www.integratedmodelling.org
**/
package org.integratedmodelling.riskwiz.jtree;
import org.integratedmodelling.riskwiz.bn.BNNode;
import org.integratedmodelling.riskwiz.bn.BeliefNetwork;
import org.integratedmodelling.riskwiz.debugger.IJTCompilerDebugger;
import org.integratedmodelling.riskwiz.domain.IntervalDomain;
import org.integratedmodelling.riskwiz.inference.IInference;
import org.integratedmodelling.riskwiz.pt.PT;
import org.integratedmodelling.riskwiz.pt.TableFactory;
/**
* @author Sergey Krivov
*
*/
public class JTInference<IJT extends IJoinTree > implements IInference {
protected IJT jTree = null;
protected BeliefNetwork bn = null;
public boolean treeIsConsistent = false;
public boolean retraction = true;
protected BNNode updatedNode = null;
/**
*
*/
public JTInference() {}
public String getAlgorithmName() {
return "faeture is not implemented";
}
public void initialize(BeliefNetwork BN, IJoinTreeCompiler comp) throws Exception {
this.bn = BN;
jTree = (IJT) comp.execute(BN);
jTree.initializeStructiure();
}
public void initialize(BeliefNetwork BN, IJoinTreeCompiler comp, IJTCompilerDebugger deb) throws Exception {
this.bn = BN;
jTree = (IJT) comp.execute(BN, deb);
jTree.initializeStructiure();
}
public void initialize(IJT jt) {
this.bn = jt.getBeliefNetwork();
jTree = jt;
jTree.initializeStructiure();
}
@Override
public void run() {
if (treeIsConsistent) {
return;
}
if (retraction || updatedNode == null) {
globalRetraction();
} else {
globalUpdate(updatedNode);
}
}
public void globalRetraction() {
jTree.initialize();
jTree.initializeLikelihoods();
jTree.propagateEvidence();
jTree.setNodeConditionalMarginals();
treeIsConsistent = true;
}
public void globalUpdate(BNNode node) {
jTree.propagateEvidence(node);
jTree.setNodeConditionalMarginals();
treeIsConsistent = true;
}
@Override
public PT getEvidence(String nodeName) {
BNNode node = bn.getBeliefNode(nodeName);
return node.getEvidence();
}
public PT getBelief(String nodeName) {
BNNode node = bn.getBeliefNode(nodeName);
return getBelief(node);
}
public PT getBelief(BNNode node) {
if (node.hasEvidence()) {
return node.getEvidence();
}
return node.getMarginal();
}
@Override
public PT getMarginal(String nodeName) {
BNNode node = bn.getBeliefNode(nodeName);
return node.getMarginal();
}
@Override
public PT getMarginal(BNNode node) {
return node.getMarginal();
}
@Override
public void setEvidence(String nodeName, PT mpt) {
BNNode node = bn.getBeliefNode(nodeName);
if (node != null) {
setEvidence(node, mpt);
}
}
@Override
public void setEvidence(BNNode node, PT mpt) {
if (node.hasEvidence() || updatedNode != null) {
retraction = true;
updatedNode = null;
} else {
updatedNode = node;
}
node.setEvidence(mpt);
treeIsConsistent = false;
}
// observation is a kind of evidence
@Override
public void setObservation(String nodeName, int valueIndex) {
BNNode node = bn.getBeliefNode(nodeName);
if (node != null) {
setObservation(node, valueIndex);
}
}
@Override
public void setObservation(String nodeName, double value) {
BNNode node = bn.getBeliefNode(nodeName);
if (node != null) {
setObservation(node, value);
}
}
@Override
public void setObservation(BNNode node, int valueIndex) {
setEvidence(node,
TableFactory.createObservation(node.getDiscretizedDomain(),
valueIndex));
}
@Override
public void setObservation(BNNode node, double value) {
if (node.getDomType() == BNNode.DomainType.continuous) {
int valueIndex = ((IntervalDomain) node.getDiscretizedDomain()).getStateIndex(
value);
if (valueIndex > -1) {
setEvidence(node,
TableFactory.createObservation(
node.getDiscretizedDomain(), valueIndex));
} else {
; // throw exception
}
} else {
; // throw exception
}
}
@Override
public void setObservation(String nodeName, String value) {
BNNode node = bn.getBeliefNode(nodeName);
if (node != null) {
setObservation(node, value);
}
}
@Override
public void setObservation(BNNode node, String value) {
setEvidence(node,
TableFactory.createObservation(node.getDiscretizedDomain(),
value));
}
@Override
public void retractEvidence(String nodeName) {
BNNode node = bn.getBeliefNode(nodeName);
if (node != null) {
retractEvidence(node);
}
}
@Override
public void retractEvidence(BNNode node) {
node.setEvidence(null);
retraction = true;
treeIsConsistent = false;
}
public IJT getJoinTree() {
return jTree;
}
}