/**
* Copyright (C) 2010 BonitaSoft S.A.
* BonitaSoft, 31 rue Gustave Eiffel - 38000 Grenoble
*
* 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 2.0 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/>.
*/
package org.bonitasoft.simulation.engine;
import groovy.lang.Binding;
import groovy.lang.GroovyShell;
import groovy.lang.Script;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import org.bonitasoft.simulation.model.instance.SimActivityInstance;
import org.bonitasoft.simulation.model.instance.SimDataInstance;
import org.bonitasoft.simulation.model.instance.SimProcessInstance;
import org.bonitasoft.simulation.model.process.NumericRange;
import org.bonitasoft.simulation.model.process.SimActivity;
import org.bonitasoft.simulation.model.process.SimBooleanData;
import org.bonitasoft.simulation.model.process.SimData;
import org.bonitasoft.simulation.model.process.SimLiteral;
import org.bonitasoft.simulation.model.process.SimLiteralsData;
import org.bonitasoft.simulation.model.process.SimNumberData;
import org.bonitasoft.simulation.model.process.SimTransition;
/**
* @author Romain Bioteau
*
*/
public class DataUtil {
private static Random RANDOM ;
private GroovyShell shell ;
private HashMap<String, Script> scripts;
private static DataUtil INSTANCE;
public static DataUtil getInstance(){
if(INSTANCE == null){
INSTANCE = new DataUtil();
RANDOM = new Random();
}
return INSTANCE;
}
public static DataUtil createInstance(){
INSTANCE = new DataUtil();
RANDOM = new Random();
return INSTANCE;
}
public Random getRandom() {
return RANDOM ;
}
private DataUtil(){
this.shell = new GroovyShell( Thread.currentThread().getContextClassLoader());
this.scripts = new HashMap<String, Script>() ;
}
public Object evaluateGroovyExpression(final String expression, final Binding binding) throws Exception {
if(scripts.get(expression) == null){
scripts.put(expression, shell.parse(expression)) ;
}
final Script script = scripts.get(expression) ;
script.setBinding(binding);
return script.run();
}
public Object generateDataInstance(final SimData d) {
if(d instanceof SimBooleanData){
return generateBoolean((SimBooleanData) d);
}else if(d instanceof SimNumberData){
return generateNumeric((SimNumberData) d);
}else if(d instanceof SimLiteralsData){
return generateLiteral((SimLiteralsData) d);
}
return null;
}
public Object generateLiteral(final SimLiteralsData d) {
final List<List<Integer>> probabilities = new ArrayList<List<Integer>>();
for(int i = 0 ; i<d.getLitterals().size() ; i++){
final List<Integer> p = new ArrayList<Integer>();
for(int j = (int) (i > 0 ? computeStart(d.getLitterals(),i): 0) ; j < (i > 0 ? probabilities.get(i-1).get(probabilities.get(i-1).size()-1)+1 + d.getLitterals().get(i).getProbability()*100 : d.getLitterals().get(i).getProbability()*100); j++){
p.add(j) ;
}
probabilities.add(p);
}
int r = RANDOM.nextInt(100) ;
for(int i = 0 ; i< probabilities.size() ; i++ ){
if(probabilities.get(i).contains(r)){
return d.getLitterals().get(i).getLitValue();
}
}
return d.getLitterals().get(probabilities.size()-1).getLitValue() ;//HANDLE CASE 33%,33%,33%
}
private int computeStart(final List<SimLiteral> litterals, final int i) {
int size = 0 ;
for(int j = i-1 ; j>=0;j-- ){
size = (int) (size + litterals.get(j).getProbability()*100) ;
}
return size;
}
public Object generateNumeric(final SimNumberData d) {
final List<List<Integer>> probabilities = new ArrayList<List<Integer>>();
for(int i = 0 ; i<d.getRanges().size() ; i++){
final List<Integer> p = new ArrayList<Integer>();
for(int j = (int) (i > 0 ?computeRangeStart(d.getRanges(),i) : 0) ; j < (i > 0 ? probabilities.get(i-1).get(probabilities.get(i-1).size()-1)+1+d.getRanges().get(i).getProbability()*100 : d.getRanges().get(i).getProbability()*100); j++){
p.add(j) ;
}
probabilities.add(p);
}
final int r = RANDOM.nextInt(100) ;
for(int i = 0 ; i< probabilities.size() ; i++ ){
if(probabilities.get(i).contains(r)){
return getRangeValue(d.getRanges().get(i));
}
}
return getRangeValue(d.getRanges().get(probabilities.size()-1)) ; //HANDLE CASE 33%,33%,33%
}
private int computeRangeStart(final List<NumericRange> ranges, final int i) {
int size = 0 ;
for(int j = i-1 ; j>=0;j-- ){
size = (int) (size + ranges.get(j).getProbability()*100) ;
}
return size;
}
public Number getRangeValue(final NumericRange numericRange) {
return nextDouble(numericRange.getMinRange().doubleValue(),numericRange.getMaxRange().doubleValue());
}
private double nextDouble(double min, double max){
double result = RANDOM.nextDouble()*(max-min)+min;
if (result >= max)
result = nextDouble(min, max);
return Math.round(result);
}
public Object generateBoolean(final SimBooleanData d) {
final int r = RANDOM.nextInt(100) ;
if (r < d.getProbabilityofTrue()*100){
return true ;
}else{
return false ;
}
}
public void updateData(SimProcessInstance processInstance,SimDataInstance processData, SimData activityData) throws Exception {
if(activityData.getExpression()!= null && activityData.getExpression().trim().length() > 0){
Binding binding = createProcessVariableBinding(processInstance);
processData.setValue(evaluateGroovyExpression(activityData.getExpression(), binding));
}
}
private Binding createProcessVariableBinding(
SimProcessInstance processInstance) {
Map<String, Object> variables = new HashMap<String, Object>();
for(SimDataInstance di : processInstance.getDataInstance()){
variables.put(di.getDefinition().getName(), di.getValue()) ;
}
return new Binding(variables);
}
public void evaluateActivityData(SimActivityInstance task) throws Exception {
for(SimData d : ((SimActivity)task.getDefinition()).getData()){
SimDataInstance di = getDataInstance(task.getProcessInstance(),d) ;
updateData(task.getProcessInstance(),di,d);
}
}
public SimDataInstance getDataInstance(SimProcessInstance parentProcessInstance, SimData d) {
for(SimDataInstance di : parentProcessInstance.getDataInstance()){
if(di.getDefinition().getName().equals(d.getName())){
return di ;
}
}
return null;
}
public boolean evaluateTransition(SimProcessInstance processInstance,SimTransition t) throws Exception {
String expression = t.getExpression() ;
Object result = evaluateGroovyExpression(expression,createProcessVariableBinding(processInstance)) ;
if(result.equals(Boolean.TRUE)){
return true;
}else if(result.equals(Boolean.FALSE)){
return false;
}else{
throw new Exception("Transition evaluation failed to return a boolean result, expression : "+expression) ; //$NON-NLS-1$
}
}
}