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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/state/StateEngine.java @ 347:16ab243507e0

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Let StateEngine compute compatibility matrix based on a list of states. artifacts/trunk@3108 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Fri, 28 Oct 2011 10:08:35 +0000
parents 2ce31a9414ff
children 5420b96dd0b3
rev   line source
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1 package de.intevation.artifactdatabase.state;
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2
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3 import java.util.ArrayList;
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4 import java.util.HashMap;
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5 import java.util.List;
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6 import java.util.Map;
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7
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8 import org.apache.log4j.Logger;
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9
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10 /**
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11 * The StateEngine stores all states and associated information about
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12 * outputs and facets for each Artifact.
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13 *
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14 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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15 */
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16 public class StateEngine {
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17
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18 /** The logger used in this class. */
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19 private static Logger logger = Logger.getLogger(StateEngine.class);
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20
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21 /**
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22 * A map that contains the states of the artifacts. The key of this map is
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23 * the name of an artifact, its value is a list of all states the artifact
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24 * can reach.
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25 */
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26 protected Map<String, List<State>> states;
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29 /**
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30 * A map that contains all existing states. The key of this map is the ID of
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31 * the state, its value is the state itself.
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32 */
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33 protected Map<String, State> allStates;
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34
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35
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36 /**
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37 * The default constructor.
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38 */
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39 public StateEngine() {
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40 states = new HashMap<String, List<State>>();
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41 allStates = new HashMap<String, State>();
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42 }
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44
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45 /**
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46 * This method adds a state into the map <i>allStates</i>.
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47 *
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48 * @param state The state to add.
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49 */
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50 protected void addState(State state) {
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51 allStates.put(state.getID(), state);
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52 }
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53
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54
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55 /**
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56 * Returns the state based on its ID.
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57 *
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58 * @param stateId The ID of the desired state.
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59 *
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60 * @return the state.
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61 */
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62 public State getState(String stateId) {
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63 return allStates.get(stateId);
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64 }
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66
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67 /**
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68 * Add new states for a specific artifact.
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69 *
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70 * @param artifact The name of the artifact.
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71 * @param states A list of states that the artifact can reach.
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72 *
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73 * @return true, if the states were added, otherwise false.
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74 */
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75 public boolean addStates(String artifact, List<State> states) {
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76 List tmp = this.states.get(artifact);
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77
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78 if (tmp != null) {
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79 logger.info(
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80 "States for the artifact '" + artifact + "' already stored.");
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81
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82 return false;
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83 }
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84
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85 // add the state to the map with all existing states
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86 for (State s: states) {
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87 addState(s);
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88 }
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89
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90 logger.debug("Add new states for the artifact '" + artifact + "'");
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91 return this.states.put(artifact, states) != null;
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92 }
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94
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95 /**
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96 * Returns the state list of an artifact specified by its name.
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97 *
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98 * @param artifact The name of the artifact (e.g. "winfo").
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99 *
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100 * @return the list of states of this artifact or <i>null</i> if no states
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101 * are existing for this <i>artifact</i>.
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102 */
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103 public List<State> getStates(String artifact) {
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104 return states.get(artifact);
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105 }
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107
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108 /**
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109 * Return mapping of output to facets for an artifact in its states.
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110 */
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111 public Map<String, List<String>> getCompatibleFacets(List<String> aStates) {
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112 Map<String, List<String>> compatibilityMatrix =
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113 new HashMap<String, List<String>>();
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114
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115 // For all states that the artifact had seen, add outputs facets.
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116 for (String stateId: aStates) {
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117
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118 State state = allStates.get(stateId);
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119 if (state == null) {
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120 continue;
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121 }
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122
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123 for (Output output: state.getOutputs()) {
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124 List<Facet> outFacets = output.getFacets();
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125
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126 List<String> oldFacets = compatibilityMatrix.get(output.getName());
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127
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128 if (oldFacets == null) {
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129 oldFacets = new ArrayList<String>();
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130 }
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131
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132 for (Facet facet: outFacets) {
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133 oldFacets.add(facet.getName());
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134 }
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135
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136 compatibilityMatrix.put(output.getName(), oldFacets);
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137 }
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138 }
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139 return compatibilityMatrix;
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140 }
104
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
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141 }
347
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142 // vim:set ts=4 sw=4 et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org