Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/org/dive4elements/artifactdatabase/state/StateEngine.java @ 473:d0ac790a6c89 dive4elements-move

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Moved directories to org.dive4elements
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 25 Apr 2013 10:57:18 +0200
parents artifact-database/src/main/java/de/intevation/artifactdatabase/state/StateEngine.java@708de1779232
children 415df0fc4fa1
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 import de.intevation.artifactdatabase.data.StateData;
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12
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13 /**
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14 * The StateEngine stores all states and associated information about
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15 * outputs and facets for each Artifact.
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16 *
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17 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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18 */
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19 public class StateEngine {
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20
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21 /** The logger used in this class. */
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22 private static Logger logger = Logger.getLogger(StateEngine.class);
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23
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24 /**
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25 * A map that contains the states of the artifacts. The key of this map is
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26 * the name of an artifact, its value is a list of all states the artifact
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27 * can reach.
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28 */
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29 protected Map<String, List<State>> states;
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32 /**
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33 * A map that contains all existing states. The key of this map is the ID of
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34 * the state, its value is the state itself.
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35 */
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36 protected Map<String, State> allStates;
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39 /**
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40 * The default constructor.
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41 */
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42 public StateEngine() {
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43 states = new HashMap<String, List<State>>();
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44 allStates = new HashMap<String, State>();
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45 }
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48 /**
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49 * This method adds a state into the map <i>allStates</i>.
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50 *
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51 * @param state The state to add.
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52 */
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53 protected void addState(State state) {
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54 allStates.put(state.getID(), state);
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55 }
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57
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58 /**
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59 * Returns the state based on its ID.
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60 *
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61 * @param stateId The ID of the desired state.
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62 *
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63 * @return the state.
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64 */
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65 public State getState(String stateId) {
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66 return allStates.get(stateId);
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67 }
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70 public StateData getStateData(String artifact, String dataName) {
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71 List<State> artifactStates = getStates(artifact);
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73 if (artifactStates == null || artifactStates.size() == 0) {
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74 logger.warn("No States for Artifact '" + artifact + "' existing.");
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75 return null;
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76 }
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78 for (State state: artifactStates) {
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79 StateData sd = state.getData(dataName);
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81 if (sd != null) {
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82 return sd;
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83 }
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84 }
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86 logger.warn(
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87 "No StateData for Artifact '" + artifact +
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88 "' with name '" + dataName + "' existing.");
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90 return null;
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91 }
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94 /**
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95 * Add new states for a specific artifact.
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96 *
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97 * @param artifact The name of the artifact.
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98 * @param states A list of states that the artifact can reach.
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99 *
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100 * @return true, if the states were added, otherwise false.
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101 */
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102 public boolean addStates(String artifact, List<State> states) {
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103 List tmp = this.states.get(artifact);
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105 if (tmp != null) {
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106 logger.info(
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107 "States for the artifact '" + artifact + "' already stored.");
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108
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109 return false;
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110 }
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111
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112 // add the state to the map with all existing states
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113 for (State s: states) {
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114 addState(s);
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115 }
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116
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117 logger.debug("Add new states for the artifact '" + artifact + "'");
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118 return this.states.put(artifact, states) != null;
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119 }
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120
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121
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122 /**
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123 * Returns the state list of an artifact specified by its name.
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124 *
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125 * @param artifact The name of the artifact (e.g. "winfo").
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126 *
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127 * @return the list of states of this artifact or <i>null</i> if no states
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128 * are existing for this <i>artifact</i>.
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129 */
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130 public List<State> getStates(String artifact) {
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131 return states.get(artifact);
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132 }
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133
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134
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135 /**
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136 * Return mapping of output to facets for an artifact in its states.
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137 */
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138 public Map<String, List<String>> getCompatibleFacets(List<String> aStates) {
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139 Map<String, List<String>> compatibilityMatrix =
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140 new HashMap<String, List<String>>();
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141
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142 // For all states that the artifact had seen, add outputs facets.
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143 logger.debug("Searching in " + aStates);
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144 for (String stateId: aStates) {
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145
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146 State state = allStates.get(stateId);
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147 if (state == null) {
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148 logger.debug("No state found for id " + stateId);
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149 continue;
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150 }
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151
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152 for (Output output: state.getOutputs()) {
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153 List<Facet> outFacets = output.getFacets();
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154 logger.debug("Facets for output " + output.getName() + " :" + outFacets);
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155
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156 List<String> oldFacets = compatibilityMatrix.get(output.getName());
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157
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158 if (oldFacets == null) {
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159 oldFacets = new ArrayList<String>();
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160 }
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161
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162 for (Facet facet: outFacets) {
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163 oldFacets.add(facet.getName());
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164 }
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165
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166 compatibilityMatrix.put(output.getName(), oldFacets);
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167 }
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168 }
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169 return compatibilityMatrix;
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170 }
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171 }
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172 // vim:set ts=4 sw=4 et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org