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This geoLatte-geom library offers a geometry model that conforms to the OGC Simple Features for SQL specification.

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package org.geolatte.geom.codec;

import org.geolatte.geom.AbstractGeometryCollection;
import org.geolatte.geom.ByteBuffer;
import org.geolatte.geom.Geometry;
import org.geolatte.geom.Position;

class MySqlWkbDialect extends Sfa110WkbDialect {
    final public static WkbDialect INSTANCE = new MySqlWkbDialect();

    @Override
    protected  int extraHeaderSize(Geometry
 geom) {
        return 4;
    }

    @Override
    protected 
 int sizeEmptyGeometry(Geometry
 geometry) {
        return ByteBuffer.UINT_SIZE;
    }

    private 
 boolean hasEmpty(Geometry
 geometry) {
        if (geometry.isEmpty()) {
            return true;
        }
        if (geometry instanceof AbstractGeometryCollection) {
            for (Geometry part : (AbstractGeometryCollection) geometry) {
                if (hasEmpty(part)) return true;
            }
        }
        return false;
    }
}