001    package net.sf.cpsolver.ifs.example.tt;
002    
003    import java.util.ArrayList;
004    import java.util.Collection;
005    import java.util.HashSet;
006    import java.util.List;
007    import java.util.Set;
008    
009    import net.sf.cpsolver.ifs.model.Variable;
010    
011    /**
012     * Activity (variable). It encodes a name, length
013     * 
014     * @version IFS 1.2 (Iterative Forward Search)<br>
015     *          Copyright (C) 2006 - 2010 Tomas Muller<br>
016     *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
017     *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
018     * <br>
019     *          This library is free software; you can redistribute it and/or modify
020     *          it under the terms of the GNU Lesser General Public License as
021     *          published by the Free Software Foundation; either version 3 of the
022     *          License, or (at your option) any later version. <br>
023     * <br>
024     *          This library is distributed in the hope that it will be useful, but
025     *          WITHOUT ANY WARRANTY; without even the implied warranty of
026     *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
027     *          Lesser General Public License for more details. <br>
028     * <br>
029     *          You should have received a copy of the GNU Lesser General Public
030     *          License along with this library; if not see
031     *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
032     */
033    public class Activity extends Variable<Activity, Location> {
034        private int iLength = 1;
035        private String iActivityId = null;
036        private String iName = null;
037        private ArrayList<List<Resource>> iResorces = new ArrayList<List<Resource>>();
038        private Set<Integer> iProhibitedSlots = new HashSet<Integer>();
039        private Set<Integer> iDiscouragedSlots = new HashSet<Integer>();
040    
041        public Activity(int length, String id, String name) {
042            super(null);
043            iLength = length;
044            iActivityId = id;
045            iName = name;
046        }
047    
048        @Override
049        public String getName() {
050            return iName;
051        }
052    
053        public String getActivityId() {
054            return iActivityId;
055        }
056    
057        public int getLength() {
058            return iLength;
059        }
060    
061        public void addResourceGroup(List<Resource> resources) {
062            for (Resource r : resources)
063                r.addVariable(this);
064            iResorces.add(resources);
065        }
066    
067        public void addResourceGroup(Resource[] resources) {
068            ArrayList<Resource> rg = new ArrayList<Resource>(resources.length);
069            for (int i = 0; i < resources.length; i++) {
070                rg.add(resources[i]);
071                resources[i].addVariable(this);
072            }
073            iResorces.add(rg);
074        }
075    
076        public void addResourceGroup(Resource resource) {
077            ArrayList<Resource> rg = new ArrayList<Resource>(1);
078            rg.add(resource);
079            iResorces.add(rg);
080            resource.addVariable(this);
081        }
082    
083        public List<Resource> getResourceGroup(int idx) {
084            return iResorces.get(idx);
085        }
086    
087        public List<List<Resource>> getResourceGroups() {
088            return iResorces;
089        }
090    
091        public Set<Integer> getProhibitedSlots() {
092            return iProhibitedSlots;
093        }
094    
095        public Set<Integer> getDiscouragedSlots() {
096            return iDiscouragedSlots;
097        }
098    
099        public void addProhibitedSlot(int day, int hour) {
100            iProhibitedSlots.add(((TimetableModel) getModel()).getNrHours() * day + hour);
101        }
102    
103        public void addDiscouragedSlot(int day, int hour) {
104            iDiscouragedSlots.add(((TimetableModel) getModel()).getNrHours() * day + hour);
105        }
106    
107        public boolean isProhibitedSlot(int day, int hour) {
108            return iProhibitedSlots.contains(((TimetableModel) getModel()).getNrHours() * day + hour);
109        }
110    
111        public boolean isDiscouragedSlot(int day, int hour) {
112            return iDiscouragedSlots.contains(((TimetableModel) getModel()).getNrHours() * day + hour);
113        }
114    
115        public void addProhibitedSlot(int slot) {
116            iProhibitedSlots.add(slot);
117        }
118    
119        public void addDiscouragedSlot(int slot) {
120            iDiscouragedSlots.add(slot);
121        }
122    
123        public boolean isProhibitedSlot(int slot) {
124            return iProhibitedSlots.contains(slot);
125        }
126    
127        public boolean isDiscouragedSlot(int slot) {
128            return iDiscouragedSlots.contains(slot);
129        }
130    
131        public boolean isProhibited(int day, int hour, int length) {
132            int slot = ((TimetableModel) getModel()).getNrHours() * day + hour;
133            for (int i = 0; i < length; i++)
134                if (iProhibitedSlots.contains(slot + i))
135                    return true;
136            return false;
137        }
138    
139        public void init() {
140            setValues(computeValues());
141        }
142    
143        private void addValues(Collection<Location> values, int day, int hour, int level, Resource[] resources) {
144            if (level == getResourceGroups().size()) {
145                values.add(new Location(this, day, hour, resources.clone()));
146                return;
147            }
148            Collection<Resource> rg = getResourceGroups().get(level);
149            for (Resource r : rg) {
150                if (r.isProhibited(day, hour, getLength()))
151                    continue;
152                resources[level] = r;
153                addValues(values, day, hour, level + 1, resources);
154            }
155        }
156    
157        public List<Location> computeValues() {
158            List<Location> values = new ArrayList<Location>();
159            Resource[] res = new Resource[getResourceGroups().size()];
160            for (int day = 0; day < ((TimetableModel) getModel()).getNrDays(); day++)
161                for (int hour = 0; hour <= ((TimetableModel) getModel()).getNrHours() - getLength(); hour++) {
162                    if (isProhibited(day, hour, getLength()))
163                        continue;
164                    addValues(values, day, hour, 0, res);
165                }
166            return values;
167        }
168    }