| 1 | package de.uka.ipd.sdq.sensorframework.dao.file.entities; |
| 2 | |
| 3 | import java.util.HashMap; |
| 4 | |
| 5 | import de.uka.ipd.sdq.sensorframework.entities.State; |
| 6 | import de.uka.ipd.sdq.sensorframework.entities.StateSensor; |
| 7 | import de.uka.ipd.sdq.sensorframework.storage.lists.ISerialiser; |
| 8 | |
| 9 | /** |
| 10 | * @author Henning Groenda |
| 11 | * @author Steffen Becker |
| 12 | */ |
| 13 | public class StateSerializer |
| 14 | implements ISerialiser<State> { |
| 15 | |
| 16 | HashMap<Long, State> hashMap = new HashMap<Long, State>(); |
| 17 | |
| 18 | StateSensor mySensor = null; |
| 19 | |
| 20 | public StateSerializer(StateSensor stateSensor){ |
| 21 | this.mySensor = stateSensor; |
| 22 | initSensorStateHash(); |
| 23 | } |
| 24 | |
| 25 | private void initSensorStateHash() { |
| 26 | hashMap.clear(); |
| 27 | for (State s : mySensor.getSensorStates()) { |
| 28 | hashMap.put(s.getStateID(),s); |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | public State[] deserialise(byte[] bytes) { |
| 33 | initSensorStateHash(); |
| 34 | |
| 35 | State[] states = new State[(int)(bytes.length / getElementLength())]; |
| 36 | int blockPos = 0; |
| 37 | for (int j = 0; j<states.length; j++){ |
| 38 | long l = 0; |
| 39 | for (int i = 7; i >=0; i--) { |
| 40 | l = l << 8; |
| 41 | l |= bytes[blockPos+i] < 0 ? 256 + bytes[blockPos+i] : bytes[blockPos+i]; |
| 42 | } |
| 43 | blockPos += 8; |
| 44 | states[j] = hashMap.get(l); |
| 45 | if (states[j] == null) |
| 46 | throw new RuntimeException("State could not be deserialized " + |
| 47 | "as it returned null values for state "+j+"."); |
| 48 | } |
| 49 | return states; |
| 50 | } |
| 51 | |
| 52 | public long getElementLength() { |
| 53 | return 8; |
| 54 | } |
| 55 | |
| 56 | public byte[] serialise(Object[] objects, int count) { |
| 57 | byte[] block = new byte[(int)(count*getElementLength())]; |
| 58 | int blockPos = 0; |
| 59 | for (int j = 0; j < count; j++){ |
| 60 | long l = ((State)objects[j]).getStateID(); |
| 61 | for (int i = 0; i < 8; i++) { |
| 62 | block[blockPos++] = (byte)(l & 0xff); |
| 63 | l = l >> 8; |
| 64 | } |
| 65 | } |
| 66 | return block; |
| 67 | } |
| 68 | |
| 69 | } |