package de.intevation.mxd.reader;

import java.io.IOException;

import org.apache.log4j.Logger;

import com.esri.arcgis.display.ISymbol;
import com.esri.arcgis.display.IMarkerSymbol;
import com.esri.arcgis.display.MultiLayerMarkerSymbol;

import org.w3c.dom.Element;
import de.intevation.mxd.utils.MapToXMLUtils;

/**
 * Reads multi layer marker symbol information.
 *
 * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
 */
public class MultiLayerMarkerSymbolReader implements ISymbolReader{

    /**
     * The logger.
     */
    private static final Logger logger =
        Logger.getLogger(MultiLayerMarkerSymbolReader.class);

    /**
     * Private member.
     */
    private Element renderer;
    private MultiLayerMarkerSymbol symbol;
    private MapToXMLUtils util;


    public MultiLayerMarkerSymbolReader(ISymbol symbol)
    throws Exception {
        logger.debug("contructor()");
        if(symbol instanceof MultiLayerMarkerSymbol) {
            this.symbol = (MultiLayerMarkerSymbol)symbol;
        }
        else {
            throw new Exception("Not a MultiLayerMarkerSymbol!");
        }
    }


    public MultiLayerMarkerSymbolReader(IMarkerSymbol symbol)
    throws Exception {
        logger.debug("contructor()");
        if(symbol instanceof MultiLayerMarkerSymbol) {
            this.symbol = (MultiLayerMarkerSymbol)symbol;
        }
        else {
            throw new Exception("Not a MultiLayerMarkerSymbol!");
        }
    }

    /**
     * Setter for the parent XML element.
     *
     * @param parent The XML parent node.
     */
    public void setParent(Element parent) {
        this.renderer = parent;
    }

    /**
     * Setter for XML document helper.
     *
     * @param util The helper class for storing map information.
     */
    public void setUtil(MapToXMLUtils util) {
        this.util = util;
    }

    /**
     * Reads the symbol attributes.
     *
     * @return The XML node.
     */
    public Element read()
    throws Exception {
        logger.debug("read()");
        for(int i = 0; i < symbol.getLayerCount(); i++) {
            ISymbol sym = (ISymbol)symbol.getLayer(i);
            ISymbolReader sreader = new MarkerSymbolReader(sym);
            sreader.setParent(renderer);
            sreader.setUtil(util);
            sreader.read();
        }
        return renderer;
    }
}
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