package com.ximple.io.dgn7;

//~--- JDK imports ------------------------------------------------------------

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;

import com.vividsolutions.jts.util.Assert;

/**
 * Dgn7fileHeader
 *
 * @author Ulysses
 * @version 0.1
 * @since 2006/5/17 下午 01:21:00
 */
public class Dgn7fileHeader {
    private short elmtype;
    private byte[] raw;

    public Dgn7fileHeader() {
    }

    public void read(ByteBuffer file, boolean strict) throws IOException {
        file.order(ByteOrder.LITTLE_ENDIAN);
        elmtype = file.getShort();

        short wtf = file.getShort();
        int length = (wtf * 2);

        if (file.remaining() != (length)) {
            Assert.shouldNeverReachHere();
        }

        raw = new byte[length];
        file.get(raw, 0, file.remaining());
    }

    public String toString() {
        return "Dgn7fileHeader{" + "raw=" + ((raw == null) ? "null" : raw.length) + '}';
    }

    public int size() {
        if (raw == null) {
            return 0;
        }

        return raw.length + 4;
    }
}