package de.intevation.mxd.reader;

import java.lang.Exception;

import org.w3c.dom.Element;

import org.apache.log4j.Logger;

import com.esri.arcgis.display.ISymbol;
import com.esri.arcgis.display.IFillSymbol;
import com.esri.arcgis.display.MultiLayerFillSymbol;
import com.esri.arcgis.display.SimpleFillSymbol;
import com.esri.arcgis.display.MarkerFillSymbol;
import com.esri.arcgis.display.LineFillSymbol;

/**
 * Wrapper for fill symbol reader.
 *
 * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
 */
public class FillSymbolReader
extends AbstractSymbolReader {

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

    /**
     * Private member.
     */
    private ISymbol symbol;
    private IFillSymbol fillSymbol;

    /**
     * Default constructor.
     */
    public FillSymbolReader()
    throws Exception {
        logger.debug("contructor()");
        this.symbol = null;
        this.fillSymbol = null;
    }

    /**
     * Constructor with symbol.
     *
     * @param symbol The symbol used to display polygons.
     */
    public FillSymbolReader(ISymbol symbol)
    throws Exception {
        logger.debug("contructor(ISymbol)");
        this.symbol = symbol;
        this.fillSymbol = null;
    }

    /**
     * Constructor with symbol.
     *
     * @param symbol The symbol used to display polygons.
     */
    public FillSymbolReader(IFillSymbol symbol)
    throws Exception {
        logger.debug("contructor(ILineSymbol)");
        this.fillSymbol = symbol;
        this.symbol= null;
    }

    /**
     * Read the symbol attributes.
     *
     * @return DOM element containing the symbol attributes.
     */
    public Element read() {
        ISymbolReader sreader = null;
        if(symbol != null) {
            try {
                if(symbol instanceof SimpleFillSymbol) {
                    sreader = new SimpleFillSymbolReader(symbol);
                }
                else if(symbol instanceof MultiLayerFillSymbol) {
                    sreader = new MultiLayerFillSymbolReader(symbol);
                }
                else if(symbol instanceof MarkerFillSymbol) {
                    sreader = new MarkerFillSymbolReader(symbol);
                }
                else if(symbol instanceof LineFillSymbol) {
                    sreader = new LineFillSymbolReader(symbol);
                }
                else {
                    logger.debug("The reader for type " +
                                 symbol.getClass().toString() +
                                 " is not implemented!");
                    return parent;
                }
            }
            catch(Exception e) {
                logger.error(
                    "Could not read the symbol " +
                    symbol.getClass().toString());
                return parent;
            }
        }
        else if(fillSymbol != null) {
            try {
                if(fillSymbol instanceof SimpleFillSymbol) {
                    sreader = new SimpleFillSymbolReader(fillSymbol);
                }
                else if(fillSymbol instanceof MultiLayerFillSymbol) {
                    sreader = new MultiLayerFillSymbolReader(fillSymbol);
                }
                else if(fillSymbol instanceof MarkerFillSymbol) {
                    sreader = new MarkerFillSymbolReader(fillSymbol);
                }
                else if(fillSymbol instanceof LineFillSymbol) {
                    sreader = new LineFillSymbolReader(fillSymbol);
                }
                else {
                    logger.debug("The reader for type " +
                                 fillSymbol.getClass().toString() +
                                 " is not implemented!");
                    return parent;
                }
            }
            catch(Exception e) {
                logger.error(
                    "Could not read the symbol " +
                    symbol.getClass().toString());
                return parent;
            }
        }
        else {
            return parent;
        }
        if (sreader != null) {
            sreader.setParent(parent);
            sreader.setUtil(util);
            sreader.read();
        }
        return parent;
    }

    /**
     * Sets the symbol to read.
     *
     * @param the symbol used to display polygons.
     */
    public void setSymbol(ISymbol sym) {
        this.symbol = sym;
        this.fillSymbol = null;
    }

    /**
     * Sets the symbol to read.
     *
     * @param the symbol used to display polygons.
     */
    public void setSymbol(IFillSymbol sym) {
        this.symbol = null;
        this.fillSymbol = sym;
    }

    /**
     * Determine whether this reader can be used to read the symbol.
     *
     * @param sym The ArcGIS symbol.
     */
    public boolean canRead(ISymbol sym) {
        if(sym instanceof SimpleFillSymbol ||
           sym instanceof MarkerFillSymbol ||
           sym instanceof MultiLayerFillSymbol ||
           sym instanceof LineFillSymbol) {
            return true;
        }
        else {
            return false;
        }
    }

    /**
     * Determine whether this reader can be used to read the symbol.
     *
     * @param sym The ArcGIS symbol.
     */
    public boolean canRead(IFillSymbol sym) {
        if(sym instanceof SimpleFillSymbol ||
           sym instanceof MarkerFillSymbol ||
           sym instanceof MultiLayerFillSymbol ||
           sym instanceof LineFillSymbol) {
            return true;
        }
        else {
            return false;
        }
    }
}
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