ingo@219: /*
ingo@219:  * Copyright (c) 2010, 2011 by Intevation GmbH
ingo@219:  *
ingo@219:  * This program is free software under the LGPL (>=v2.1)
ingo@219:  * Read the file LGPL.txt coming with the software for details
ingo@219:  * or visit http://www.gnu.org/licenses/ if it does not exist.
ingo@219:  */
ingo@219: package de.intevation.artifactdatabase;
ingo@219: 
felix@362: import org.apache.log4j.Logger;
felix@362: 
felix@353: import java.util.ArrayList;
felix@353: import java.util.List;
felix@362: import java.util.Map;
ingo@219: import java.util.HashMap;
ingo@219: 
ingo@219: import de.intevation.artifacts.ArtifactDatabase;
ingo@219: import de.intevation.artifacts.CallContext;
ingo@219: import de.intevation.artifacts.CallMeta;
felix@353: import de.intevation.artifacts.DataProvider;
ingo@219: 
ingo@219: 
ingo@219: /**
ingo@219:  * Abstract class that implements some basic methods of a CallContext.
ingo@219:  *
ingo@219:  * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
ingo@219:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@219:  */
ingo@219: public abstract class AbstractCallContext implements CallContext {
ingo@219: 
felix@362:     Logger logger = Logger.getLogger(AbstractCallContext.class);
felix@362: 
ingo@219:     /**
ingo@219:      * The ArtifactDatabase instance.
ingo@219:      */
ingo@219:     protected ArtifactDatabaseImpl database;
ingo@219: 
ingo@219:     /**
ingo@219:      * The action to be performed after the artifacts or collections calls.
ingo@219:      */
ingo@219:     protected int action;
ingo@219: 
ingo@219:     /**
ingo@219:      * The meta information of the concrete call (preferred languages et. al.)
ingo@219:      */
ingo@219:     protected CallMeta callMeta;
ingo@219: 
ingo@219:     /**
ingo@219:      * Map to act like a clipboard when nesting calls like a proxy artifact.
ingo@219:      */
sascha@366:     protected Map customValues;
ingo@219: 
felix@353:     /**
felix@353:      * Map to act like a clipboard when nesting calls like a proxy artifact.
felix@353:      */
sascha@366:     protected Map<Object, List<DataProvider>> dataProviders;
felix@353: 
ingo@219: 
ingo@219:     /**
ingo@219:      * The default constructor of this abstract CallContext.
ingo@219:      *
felix@400:      * @param artifactDatabase The artifact database.
ingo@219:      * @param action The action.
ingo@219:      * @param callMeta The CallMeta object.
ingo@219:      */
ingo@219:     public AbstractCallContext(
ingo@219:         ArtifactDatabaseImpl artifactDatabase,
ingo@219:         int                  action,
sascha@246:         CallMeta             callMeta
sascha@246:     ) {
ingo@219:         this.database = artifactDatabase;
ingo@219:         this.action   = action;
ingo@219:         this.callMeta = callMeta;
sascha@246: 
sascha@246:         database.initCallContext(this);
ingo@219:     }
ingo@219: 
ingo@219: 
sascha@246:     public void postCall() {
sascha@246:         database.closeCallContext(this);
sascha@246:     }
ingo@219: 
ingo@219:     public abstract void afterCall(int action);
ingo@219: 
ingo@219:     public abstract Long getTimeToLive();
ingo@219: 
ingo@219:     public abstract void afterBackground(int action);
ingo@219: 
ingo@219: 
ingo@219:     public Object globalContext() {
sascha@246:         return database.context;
ingo@219:     }
ingo@219: 
ingo@219: 
ingo@219:     public ArtifactDatabase getDatabase() {
ingo@219:         return database;
ingo@219:     }
ingo@219: 
ingo@219: 
ingo@219:     public CallMeta getMeta() {
ingo@219:         return callMeta;
ingo@219:     }
ingo@219: 
ingo@219: 
ingo@219:     public Object getContextValue(Object key) {
ingo@219:         return customValues != null
ingo@219:             ? customValues.get(key)
ingo@219:             : null;
ingo@219:     }
ingo@219: 
ingo@219:     public Object putContextValue(Object key, Object value) {
ingo@219:         if (customValues == null) {
ingo@219:             customValues = new HashMap();
ingo@219:         }
ingo@219:         return customValues.put(key, value);
ingo@219:     }
felix@353: 
felix@353:     /**
felix@353:      * Get list of DataProviders that registered for given key.
felix@353:      * @return list (empty list if none found, never null).
felix@353:      */
felix@353:     public List<DataProvider> getDataProvider(Object key) {
felix@362:         if (dataProviders != null) {
felix@362:             List<DataProvider> list = dataProviders.get(key);
felix@362:             return list != null
felix@362:                 ? list
felix@362:                 : java.util.Collections.<DataProvider>emptyList();
felix@362:         }
felix@362:         return java.util.Collections.<DataProvider>emptyList();
felix@353:     }
felix@353: 
felix@362: 
felix@353:     /**
felix@353:      * Let a DataProvider register itself with given key.
felix@353:      * Multiple DataProvider can register under the same key.
felix@353:      */
felix@353:     public Object registerDataProvider(Object key, DataProvider value) {
felix@353:         List<DataProvider> providers = null;
felix@353:         if (dataProviders == null) {
felix@353:             dataProviders = new HashMap();
felix@353:             providers = new ArrayList<DataProvider>();
felix@353:             providers.add(value);
felix@353:             return dataProviders.put(key, providers);
felix@353:         }
felix@353:         providers = dataProviders.get(key);
felix@353: 
felix@353:         if (providers == null) {
felix@353:             providers = new ArrayList<DataProvider>();
felix@353:         }
felix@353:         providers.add(value);
felix@353:         return dataProviders.put(key, providers);
felix@353:     }
ingo@219: }
ingo@219: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :