view flys-artifacts/src/main/java/de/intevation/flys/artifacts/context/FLYSContext.java @ 4655:cd44d28d0fbc

Move the access to artifact data to the Access object Use BedHeightAccess class to receive the data from the artifact. This abstracts the data access from the actual artifact.
author Björn Ricks <bjoern.ricks@intevation.de>
date Tue, 11 Dec 2012 09:44:04 +0100
parents 28be160b5870
children
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package de.intevation.flys.artifacts.context;

import java.util.Map;

import org.apache.log4j.Logger;

import org.w3c.dom.Document;

import de.intevation.artifactdatabase.DefaultArtifactContext;
import de.intevation.artifacts.CallContext;
import de.intevation.flys.exports.OutGenerator;


/**
 * This class is used to store application wide information in a global context.
 *
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class FLYSContext extends DefaultArtifactContext {

    /** The logger used in this class. */
    private static Logger logger = Logger.getLogger(FLYSContext.class);

    /** The key that is used to store the StateEngine in the context. */
    public static final String ARTIFACT_KEY =
        "artifact";

    /** The key that is used to store the TransitionEngine in the context. */
    public static final String TRANSITION_ENGINE_KEY =
        "artifact.transition.engine";

    /** The key that is used to store the StateEngine in the context. */
    public static final String STATE_ENGINE_KEY =
        "artifact.state.engine";

    /** The key that is used to store the Map of OutGenerator classes in the
     * context. */
    public static final String OUTGENERATORS_KEY =
        "flys.export.outgenerators";

    /** The key that is used to store the map of themes in the context. */
    public static final String THEMES =
        "flys.themes.map";

    /** The key that is used to store a map of theme mappings in the context. */
    public static final String THEME_MAPPING =
        "flys.themes.mapping.map";

    /** The key that is used to store a map of WMS urls for each river. */
    public static final String RIVER_WMS =
        "flys.floodmap.river.wms";

    /** The key that is used to store an instance of Scheduler in the context.*/
    public static final String SCHEDULER =
        "flys.wsplgen.scheduler";

    /** Key to store the configured modules in the context. */
    public static final String MODULES = "flys.modules";


    /**
     * The default constructor.
     */
    public FLYSContext() {
        super();
    }


    /**
     * A constructor with a config document.
     */
    public FLYSContext(Document config) {
        super(config);
    }

    /**
     * Returns the OutGenerator for a specified <i>type</i>.
     *
     * @param name The name of the output type.
     * @param type Defines the type of the desired OutGenerator.
     *
     * @return Instance of an OutGenerator for specified <i>type</i>.
     */
    public static OutGenerator getOutGenerator(
        CallContext context,
        String      name,
        String      type)
    {

        FLYSContext flysContext = context instanceof FLYSContext
            ? (FLYSContext) context
            : (FLYSContext) context.globalContext();

        Map<String, Class> generators = (Map<String, Class>)
            flysContext.get(FLYSContext.OUTGENERATORS_KEY);

        if (generators == null) {
            return null;
        }

        Class clazz = generators.get(name);

        try {
            return clazz != null ? (OutGenerator) clazz.newInstance() : null;
        }
        catch (InstantiationException ie) {
            logger.error(ie, ie);
        }
        catch (IllegalAccessException iae) {
            logger.error(iae, iae);
        }

        return null;
    }
}
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