/**
* Copyright (c) 2011, SOCIETIES Consortium (WATERFORD INSTITUTE OF TECHNOLOGY (TSSG), HERIOT-WATT UNIVERSITY (HWU), SOLUTA.NET
* (SN), GERMAN AEROSPACE CENTRE (Deutsches Zentrum fuer Luft- und Raumfahrt e.V.) (DLR), Zavod za varnostne tehnologije
* informacijske družbe in elektronsko poslovanje (SETCCE), INSTITUTE OF COMMUNICATION AND COMPUTER SYSTEMS (ICCS), LAKE
* COMMUNICATIONS (LAKE), INTEL PERFORMANCE LEARNING SOLUTIONS LTD (INTEL), PORTUGAL TELECOM INOVAÇÃO, SA (PTIN), IBM Corp.,
* INSTITUT TELECOM (ITSUD), AMITEC DIACHYTI EFYIA PLIROFORIKI KAI EPIKINONIES ETERIA PERIORISMENIS EFTHINIS (AMITEC), TELECOM
* ITALIA S.p.a.(TI), TRIALOG (TRIALOG), Stiftelsen SINTEF (SINTEF), NEC EUROPE LTD (NEC))
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.societies.personalisation.UserPreferenceLearning.impl.threads;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.societies.api.context.model.CtxHistoryAttribute;
import org.societies.api.internal.context.broker.ICtxBroker;
import org.societies.api.schema.servicelifecycle.model.ServiceResourceIdentifier;
import org.societies.personalisation.UserPreferenceLearning.impl.C45Output;
import org.societies.personalisation.UserPreferenceLearning.impl.CtxIdentifierCache;
import org.societies.personalisation.UserPreferenceLearning.impl.HistoryRetriever;
import org.societies.personalisation.UserPreferenceLearning.impl.PostProcessor;
import org.societies.personalisation.UserPreferenceLearning.impl.PreProcessor;
import org.societies.personalisation.preference.api.model.ActionSubset;
import org.societies.personalisation.preference.api.model.IC45Consumer;
import org.societies.personalisation.preference.api.model.IC45Output;
import org.societies.personalisation.preference.api.model.IPreferenceTreeModel;
import org.societies.personalisation.preference.api.model.ServiceSubset;
import weka.classifiers.trees.Id3;
import weka.core.Instances;
public class SA_AI extends Thread{
private Logger LOG = LoggerFactory.getLogger(SA_AI.class);
private IC45Consumer requestor;
private Date startDate;
private ServiceResourceIdentifier serviceId;
private String parameterName;
private HistoryRetriever historyRetriever;
private PreProcessor preProcessor;
private PostProcessor postProcessor;
//Specific action - All identities
public SA_AI(IC45Consumer requestor, Date startDate, ServiceResourceIdentifier serviceId, String parameterName, ICtxBroker ctxBroker){
this.requestor = requestor;
this.startDate = startDate;
this.serviceId = serviceId;
this.parameterName = parameterName;
historyRetriever = new HistoryRetriever(ctxBroker);
preProcessor = new PreProcessor();
postProcessor = new PostProcessor();
}
@Override
public void run(){
LOG.info("C45 REQUEST FROM: "+requestor.getClass().getName());
LOG.info("Starting C45 learning process on action: "+parameterName+" for serviceId: "+serviceId.toString());
//create new Cache for cycle
CtxIdentifierCache cache = new CtxIdentifierCache();
//logging.info("Retrieving all DPIs");
//IIdentity[] historyOwners = null; //dpiRetriever.getDPIs();
List<IC45Output> output = new ArrayList<IC45Output>();
//For each DPI
//for(int i=0; i<historyOwners.length; i++){
//IIdentity nextHistoryOwner = (IIdentity)historyOwners[i];
//get history
Map<CtxHistoryAttribute, List<CtxHistoryAttribute>> history =
historyRetriever.getFullHistory(startDate);
if(history != null && history.size()>0){
//store context attribute identifiers with types
cache.cacheCtxIdentifiers(history);
//extract instances with serviceId and action
//System.out.println("Extracting "+parameterName+" actions for service "+serviceId.toString()+" from history");
ServiceSubset serviceSubset =
preProcessor.extractServiceActions(history, serviceId, parameterName);
//remove consistent context attributes from history
ServiceSubset trimmedHistory = preProcessor.trimServiceSubset(serviceSubset);
List<ActionSubset> actionSubsetList = trimmedHistory.getActionSubsets();
ActionSubset actionSubset = (ActionSubset)actionSubsetList.get(0);
IC45Output nextOutput = new C45Output(null, serviceId, trimmedHistory.getServiceType());
if(actionSubset.size()>0){
IPreferenceTreeModel treeModel = runCycle(actionSubset, cache, trimmedHistory.getServiceType());
if(treeModel!=null){
nextOutput.addTree(treeModel);
}
output.add(nextOutput);
}
}else{
LOG.debug("No History found this user");
}
//}
//send DPI based output to requestor
LOG.info("RETURNING C45 OUTPUT TO: "+requestor.getClass().getName());
try{
requestor.handleC45Output(output);
}catch(Exception e){
LOG.debug("The C45 requestor service is not available to handle response");
}
}
/*
* Algorithm methods
*/
private IPreferenceTreeModel runCycle(
ActionSubset input,
CtxIdentifierCache cache,
String serviceType){
//convert to Instances for each serviceId
Instances instances = preProcessor.toInstances(input);
//System.out.println("C45 executing...");
String outputString = null;
try{
outputString = executeAlgorithm(instances);
} catch (Exception e) {
System.out.println("No rules could be learned from the current history set\nException: "+e.toString());
e.printStackTrace();
return null;
}
//convert tree strings into JTrees for output
String paramName = input.getParameterName();
return (IPreferenceTreeModel)postProcessor.process(paramName, outputString, cache, serviceId, serviceType);
}
private String executeAlgorithm(Instances input)throws Exception
{
Id3 id3 = new Id3();
//c45 = new C45PruneableClassifierTree
//(model, false, 0, false, false);
input.setClassIndex(input.numAttributes()-1);
//c45.buildClassifier(input);
id3.buildClassifier(input);
//System.out.println("ID3 output: "+id3.toString());
return id3.toString();
}
}