DataService.java

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package edu.rice.cs.hpc.traceviewer.services;

import java.util.HashMap;
import java.util.Map;

import org.eclipse.ui.AbstractSourceProvider;
import org.eclipse.ui.ISources;

import edu.rice.cs.hpc.traceviewer.spaceTimeData.SpaceTimeDataController;

public class DataService extends AbstractSourceProvider {

    final static public String DATA_PROVIDER = "edu.rice.cs.hpc.traceviewer.services.DataService.data";
    final static public String DATA_UPDATE = "edu.rice.cs.hpc.traceviewer.services.DataService.update";
    
    private SpaceTimeDataController data;
    

    /*
     * (non-Javadoc)
     * @see org.eclipse.ui.ISourceProvider#dispose()
     */
    public void dispose() {}

    /*
     * (non-Javadoc)
     * @see org.eclipse.ui.ISourceProvider#getCurrentState()
     */
    public Map getCurrentState() {

        Map<String, Object> map = new HashMap<String, Object>(1);
        map.put(DATA_PROVIDER, getValue());
        map.put(DATA_UPDATE, data);
        
        return map;
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.ui.ISourceProvider#getProvidedSourceNames()
     */
    public String[] getProvidedSourceNames() {

        return new String[] {DATA_PROVIDER, DATA_UPDATE};
    }
    
    /***
     * set the updated data
     * @param data
     */
    public void setData( SpaceTimeDataController data ) {
        this.data = data;
        fireSourceChanged(ISources.WORKBENCH, DATA_PROVIDER, "ENABLED");
    }
    
    /***
     * broadcast updated data
     */
    public void broadcastUpdate( Object updatedData ) {
        if (updatedData == null)
            fireSourceChanged(ISources.WORKBENCH, DATA_UPDATE, data);
        else
            fireSourceChanged(ISources.WORKBENCH, DATA_UPDATE, updatedData);
    }
    
    /***
     * retrieve the current data
     * @return
     */
    public SpaceTimeDataController getData() {
        return data;
    }
 
    
    private String getValue() {
        return (data != null)? "ENABLED" : "DISABLED";
    }
}