Application: gvSIG desktop

package org.gvsig.expressionevaluator.impl.function.spatial;

import org.apache.commons.lang3.Range;

import org.gvsig.expressionevaluator.Interpreter;

import org.gvsig.expressionevaluator.spi.AbstractFunction;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.type.GeometryType;

public class STDimensionFunction extends AbstractFunction {

    public STDimensionFunction() {

        super("OGC", "ST_Dimension", Range.is(1));

    }

    @Override

    public Object call(Interpreter interpreter, Object[] args) throws Exception {

        Geometry geom = getGeom(args, 0);

        GeometryType type = geom.getGeometryType();

        if( type.isSubTypeOf(Geometry.TYPES.POINT)

            || type.isSubTypeOf(Geometry.TYPES.MULTIPOINT) ) {

            return 0;

        }

        if( type.isSubTypeOf(Geometry.TYPES.CURVE)

            || type.isSubTypeOf(Geometry.TYPES.MULTICURVE) ) {

            return 1;

        }

        if( type.isSubTypeOf(Geometry.TYPES.SURFACE)

            || type.isSubTypeOf(Geometry.TYPES.MULTISURFACE) ) {

            return 2;

        }

        if( type.isSubTypeOf(Geometry.TYPES.SOLID) ) {

            return 3;

        }

        return -1;

    }

}