Mercurial > dive4elements > framework
view artifact-database/src/main/java/de/intevation/artifactdatabase/state/StateEngine.java @ 361:b47d0464f0db
Extended the Output interface and its default implementation with a method to replace an existing list of Facets.
artifacts/trunk@3429 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Fri, 16 Dec 2011 09:14:14 +0000 |
parents | 16ab243507e0 |
children | 5420b96dd0b3 |
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package de.intevation.artifactdatabase.state; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.log4j.Logger; /** * The StateEngine stores all states and associated information about * outputs and facets for each Artifact. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class StateEngine { /** The logger used in this class. */ private static Logger logger = Logger.getLogger(StateEngine.class); /** * A map that contains the states of the artifacts. The key of this map is * the name of an artifact, its value is a list of all states the artifact * can reach. */ protected Map<String, List<State>> states; /** * A map that contains all existing states. The key of this map is the ID of * the state, its value is the state itself. */ protected Map<String, State> allStates; /** * The default constructor. */ public StateEngine() { states = new HashMap<String, List<State>>(); allStates = new HashMap<String, State>(); } /** * This method adds a state into the map <i>allStates</i>. * * @param state The state to add. */ protected void addState(State state) { allStates.put(state.getID(), state); } /** * Returns the state based on its ID. * * @param stateId The ID of the desired state. * * @return the state. */ public State getState(String stateId) { return allStates.get(stateId); } /** * Add new states for a specific artifact. * * @param artifact The name of the artifact. * @param states A list of states that the artifact can reach. * * @return true, if the states were added, otherwise false. */ public boolean addStates(String artifact, List<State> states) { List tmp = this.states.get(artifact); if (tmp != null) { logger.info( "States for the artifact '" + artifact + "' already stored."); return false; } // add the state to the map with all existing states for (State s: states) { addState(s); } logger.debug("Add new states for the artifact '" + artifact + "'"); return this.states.put(artifact, states) != null; } /** * Returns the state list of an artifact specified by its name. * * @param artifact The name of the artifact (e.g. "winfo"). * * @return the list of states of this artifact or <i>null</i> if no states * are existing for this <i>artifact</i>. */ public List<State> getStates(String artifact) { return states.get(artifact); } /** * Return mapping of output to facets for an artifact in its states. */ public Map<String, List<String>> getCompatibleFacets(List<String> aStates) { Map<String, List<String>> compatibilityMatrix = new HashMap<String, List<String>>(); // For all states that the artifact had seen, add outputs facets. for (String stateId: aStates) { State state = allStates.get(stateId); if (state == null) { continue; } for (Output output: state.getOutputs()) { List<Facet> outFacets = output.getFacets(); List<String> oldFacets = compatibilityMatrix.get(output.getName()); if (oldFacets == null) { oldFacets = new ArrayList<String>(); } for (Facet facet: outFacets) { oldFacets.add(facet.getName()); } compatibilityMatrix.put(output.getName(), oldFacets); } } return compatibilityMatrix; } } // vim:set ts=4 sw=4 et sta sts=4 fenc=utf8 :