Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/state/StateEngine.java @ 310:63122b9dee1d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added interface to listen events in the backend. artifacts/trunk@2435 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 01 Aug 2011 09:41:40 +0000
parents 2ce31a9414ff
children 16ab243507e0
rev   line source
104
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
1 package de.intevation.artifactdatabase.state;
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
2
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
3 import java.util.HashMap;
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
4 import java.util.List;
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
5 import java.util.Map;
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
6
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
7 import org.apache.log4j.Logger;
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
8
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
9 /**
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
10 * The StateEngine stores all states for each Artifact.
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
11 *
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
12 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
13 */
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
14 public class StateEngine {
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
15
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
16 /** The logger used in this class. */
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
17 private static Logger logger = Logger.getLogger(StateEngine.class);
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
18
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
19 /**
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
20 * A map that contains the states of the artifacts. The key of this map is
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
21 * the name of an artifact, its value is a list of all states the artifact
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
22 * can reach.
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
23 */
272
2ce31a9414ff Use generics more precisely
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 108
diff changeset
24 protected Map<String, List<State>> states;
104
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
25
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
26
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
27 /**
108
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
28 * A map that contains all existing states. The key of this map is the ID of
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
29 * the state, its value is the state itself.
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
30 */
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
31 protected Map<String, State> allStates;
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
32
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
33
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
34 /**
104
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
35 * The default constructor.
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
36 */
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
37 public StateEngine() {
272
2ce31a9414ff Use generics more precisely
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 108
diff changeset
38 states = new HashMap<String, List<State>>();
108
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
39 allStates = new HashMap<String, State>();
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
40 }
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
41
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
42
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
43 /**
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
44 * This method adds a state into the map <i>allStates</i>.
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
45 *
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
46 * @param state The state to add.
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
47 */
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
48 protected void addState(State state) {
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
49 allStates.put(state.getID(), state);
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
50 }
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
51
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
52
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
53 /**
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
54 * Returns the state based on its ID.
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
55 *
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
56 * @param stateId The ID of the desired state.
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
57 *
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
58 * @return the state.
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
59 */
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
60 public State getState(String stateId) {
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
61 return allStates.get(stateId);
104
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
62 }
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
63
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
64
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
65 /**
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
66 * Add new states for a specific artifact.
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
67 *
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
68 * @param artifact The name of the artifact.
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
69 * @param states A list of states that the artifact can reach.
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
70 *
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
71 * @return true, if the states were added, otherwise false.
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
72 */
108
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
73 public boolean addStates(String artifact, List<State> states) {
104
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
74 List tmp = this.states.get(artifact);
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
75
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
76 if (tmp != null) {
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
77 logger.info(
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
78 "States for the artifact '" + artifact + "' already stored.");
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
79
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
80 return false;
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
81 }
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
82
108
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
83 // add the state to the map with all existing states
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
84 for (State s: states) {
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
85 addState(s);
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
86 }
9ece61d918b1 Improved the StateEngine and the TransitionEngine to retrieve the reachable states of a current state.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 106
diff changeset
87
104
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
88 logger.debug("Add new states for the artifact '" + artifact + "'");
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
89 return this.states.put(artifact, states) != null;
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
90 }
106
ece0fdb07975 Implementations to initialize and retrieve states.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 104
diff changeset
91
ece0fdb07975 Implementations to initialize and retrieve states.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 104
diff changeset
92
ece0fdb07975 Implementations to initialize and retrieve states.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 104
diff changeset
93 /**
ece0fdb07975 Implementations to initialize and retrieve states.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 104
diff changeset
94 * Returns the state list of an artifact specified by its name.
ece0fdb07975 Implementations to initialize and retrieve states.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 104
diff changeset
95 *
ece0fdb07975 Implementations to initialize and retrieve states.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 104
diff changeset
96 * @param artifact The name of the artifact.
ece0fdb07975 Implementations to initialize and retrieve states.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 104
diff changeset
97 *
ece0fdb07975 Implementations to initialize and retrieve states.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 104
diff changeset
98 * @return the list of states of this artifact or <i>null</i> if no states
ece0fdb07975 Implementations to initialize and retrieve states.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 104
diff changeset
99 * are existing for this <i>artifact</i>.
ece0fdb07975 Implementations to initialize and retrieve states.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 104
diff changeset
100 */
ece0fdb07975 Implementations to initialize and retrieve states.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 104
diff changeset
101 public List<State> getStates(String artifact) {
ece0fdb07975 Implementations to initialize and retrieve states.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 104
diff changeset
102 return states.get(artifact);
ece0fdb07975 Implementations to initialize and retrieve states.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 104
diff changeset
103 }
104
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
104 }
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
105 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org