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/*******************************************************************************
* Copyright (c) 2009, 2013 Daniel Le Berre and others. All rights reserved. This
* program and the accompanying materials are made available under the terms of
* the Eclipse Public License v1.0 which accompanies this distribution, and is
* available at http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Daniel Le Berre - initial API and implementation
* Red Hat, Inc. - support for remediation page
******************************************************************************/
package org.eclipse.equinox.internal.p2.director;
import java.math.BigInteger;
import java.util.*;
import org.eclipse.equinox.internal.p2.director.Projector.AbstractVariable;
import org.eclipse.equinox.p2.metadata.*;
import org.eclipse.equinox.p2.query.*;
import org.sat4j.pb.tools.*;
import org.sat4j.specs.ContradictionException;
public class UserDefinedOptimizationFunction extends OptimizationFunction {
private Collection<IInstallableUnit> alreadyExistingRoots;
private LexicoHelper<Object, Explanation> dependencyHelper;
private IQueryable<IInstallableUnit> picker;
private List changeVariables = new ArrayList();
private List removalVariables = new ArrayList();
private List newVariables = new ArrayList();
public UserDefinedOptimizationFunction(IQueryable<IInstallableUnit> lastState, List<AbstractVariable> abstractVariables, List<AbstractVariable> optionalVariables, IQueryable<IInstallableUnit> picker, IInstallableUnit selectionContext, Map<String, Map<Version, IInstallableUnit>> slice, DependencyHelper<Object, Explanation> dependencyHelper, Collection<IInstallableUnit> alreadyInstalledIUs) {
super(lastState, abstractVariables, optionalVariables, picker, selectionContext, slice);
this.picker = picker;
this.slice = slice;
this.dependencyHelper = (LexicoHelper<Object, Explanation>) dependencyHelper;
this.alreadyExistingRoots = alreadyInstalledIUs;
}
public List<WeightedObject<? extends Object>> createOptimizationFunction(IInstallableUnit metaIu, Collection<IInstallableUnit> newRoots) {
List weightedObjects = new ArrayList();
List objects = new ArrayList();
BigInteger weight = BigInteger.valueOf(slice.size() + 1);
String[] criteria = new String[] {"+new", "-removed", "-changed"};
BigInteger currentWeight = weight.pow(criteria.length - 1);
int formermaxvarid = dependencyHelper.getSolver().nextFreeVarId(false);
int newmaxvarid;
boolean maximizes;
Object thing;
for (int i = 0; i < criteria.length; i++) {
if (criteria[i].endsWith("new")) {
weightedObjects.clear();
newRoots(weightedObjects, criteria[i].startsWith("+") ? currentWeight.negate() : currentWeight, metaIu);
currentWeight = currentWeight.divide(weight);
} else if (criteria[i].endsWith("removed")) {
weightedObjects.clear();
removedRoots(weightedObjects, criteria[i].startsWith("+") ? currentWeight.negate() : currentWeight, metaIu);
currentWeight = currentWeight.divide(weight);
// } else if (criteria[i].endsWith("notuptodate")) {
// weightedObjects.clear();
// notuptodate(weightedObjects, criteria[i].startsWith("+") ? currentWeight.negate() : currentWeight, metaIu);
// currentWeight = currentWeight.divide(weight);
// } else if (criteria[i].endsWith("unsat_recommends")) {
// weightedObjects.clear();
// optional(weightedObjects, criteria[i].startsWith("+") ? currentWeight.negate() : currentWeight, metaIu);
// currentWeight = currentWeight.divide(weight);
// } else if (criteria[i].endsWith("versionchanged")) {
// weightedObjects.clear();
// versionChanged(weightedObjects, criteria[i].startsWith("+") ? currentWeight.negate() : currentWeight, metaIu);
} else if (criteria[i].endsWith("changed")) {
weightedObjects.clear();
changedRoots(weightedObjects, criteria[i].startsWith("+") ? currentWeight.negate() : currentWeight, metaIu);
currentWeight = currentWeight.divide(weight);
// } else if (criteria[i].contains("sum")) {
// weightedObjects.clear();
// sum(weightedObjects, criteria[i].charAt(0) == '-', metaIu, Options.extractSumProperty(criteria[i]));
// dependencyHelper.addWeightedCriterion(weightedObjects);
// System.out.println("# criteria " + criteria[i].substring(1) + " size is " + weightedObjects.size());
// continue;
// } else {
// System.out.println("Skipping unknown criteria:" + criteria[i]);
}
objects.clear();
maximizes = criteria[i].startsWith("+");
for (Iterator it = weightedObjects.iterator(); it.hasNext();) {
thing = ((WeightedObject) it.next()).thing;
if (maximizes) {
thing = dependencyHelper.not(thing);
}
objects.add(thing);
}
dependencyHelper.addCriterion(objects);
newmaxvarid = dependencyHelper.getSolver().nextFreeVarId(false);
// System.out.println("# criteria " + criteria[i].substring(1) + " size is " + objects.size() + " using new vars " + formermaxvarid + " to " + newmaxvarid);
formermaxvarid = newmaxvarid;
}
weightedObjects.clear();
return null;
}
protected void changedRoots(List<WeightedObject<?>> weightedObjects, BigInteger weight, IInstallableUnit entryPointIU) {
Collection<IRequirement> requirements = entryPointIU.getRequirements();
for (IRequirement req : requirements) {
IQuery<IInstallableUnit> query = QueryUtil.createMatchQuery(req.getMatches());
IQueryResult<IInstallableUnit> matches = picker.query(query, null);
Object[] changed = new Object[matches.toUnmodifiableSet().size()];
int i = 0;
for (IInstallableUnit match : matches) {
changed[i++] = isInstalledAsRoot(match) ? dependencyHelper.not(match) : match;
}
try {
Projector.AbstractVariable abs = new Projector.AbstractVariable("CHANGED"); //TODO
changeVariables.add(abs);
// abs <=> iuv1 or not iuv2 or ... or not iuvn
dependencyHelper.or(FakeExplanation.getInstance(), abs, changed);
weightedObjects.add(WeightedObject.newWO(abs, weight));
} catch (ContradictionException e) {
// TODO Auto-generated catch block TODO
e.printStackTrace();
}
}
}
protected void newRoots(List<WeightedObject<?>> weightedObjects, BigInteger weight, IInstallableUnit entryPointIU) {
Collection<IRequirement> requirements = entryPointIU.getRequirements();
for (IRequirement req : requirements) {
IQuery<IInstallableUnit> query = QueryUtil.createMatchQuery(req.getMatches());
IQueryResult<IInstallableUnit> matches = picker.query(query, null);
boolean oneInstalled = false;
for (IInstallableUnit match : matches) {
oneInstalled = oneInstalled || isInstalledAsRoot(match);
}
if (!oneInstalled) {
try {
Projector.AbstractVariable abs = new Projector.AbstractVariable("NEW"); //TODO
newVariables.add(abs);
// a <=> iuv1 or ... or iuvn
dependencyHelper.or(FakeExplanation.getInstance(), abs, matches.toArray(IInstallableUnit.class));
weightedObjects.add(WeightedObject.newWO(abs, weight));
} catch (ContradictionException e) {
// should not happen
e.printStackTrace();
}
}
}
}
protected void removedRoots(List<WeightedObject<?>> weightedObjects, BigInteger weight, IInstallableUnit entryPointIU) {
Collection<IRequirement> requirements = entryPointIU.getRequirements();
for (IRequirement req : requirements) {
IQuery<IInstallableUnit> query = QueryUtil.createMatchQuery(req.getMatches());
IQueryResult<IInstallableUnit> matches = picker.query(query, null);
boolean installed = false;
Object[] literals = new Object[matches.toUnmodifiableSet().size()];
int i = 0;
for (IInstallableUnit match : matches) {
installed = installed || isInstalledAsRoot(match);
literals[i++] = dependencyHelper.not(match);
}
if (installed) {
try {
Projector.AbstractVariable abs = new Projector.AbstractVariable("REMOVED"); //TODO
removalVariables.add(abs);
// abs <=> not iuv1 and ... and not iuvn
dependencyHelper.and(FakeExplanation.getInstance(), abs, literals);
weightedObjects.add(WeightedObject.newWO(abs, weight));
} catch (ContradictionException e) {
// should not happen TODO
e.printStackTrace();
}
}
}
}
private static class FakeExplanation extends Explanation {
private static Explanation singleton = new FakeExplanation();
public static Explanation getInstance() {
return singleton;
}
protected int orderValue() {
return Explanation.OTHER_REASON;
}
@Override
public int shortAnswer() {
return 0;
}
}
private boolean isInstalledAsRoot(IInstallableUnit isInstalled) {
for (IInstallableUnit installed : alreadyExistingRoots) {
if (isInstalled.equals(installed))
return true;
}
return false;
}
}
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