Application: gvSIG desktop

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

import org.apache.commons.lang3.Range;

import org.cresques.cts.IProjection;

import org.gvsig.expressionevaluator.ExpressionRuntimeException;

import static org.gvsig.expressionevaluator.GeometryExpressionBuilderHelper.FUNCTION_ST_SETSRID;

import org.gvsig.expressionevaluator.Interpreter;

import org.gvsig.expressionevaluator.spi.AbstractGeometryFunction;

import org.gvsig.fmap.crs.CRSFactory;

import org.gvsig.fmap.geom.Geometry;

public class STSetSRIDFunction extends AbstractGeometryFunction {

    public STSetSRIDFunction() {

        super("OGC", FUNCTION_ST_SETSRID, Range.is(2));

    }

    @Override

    public boolean allowConstantFolding() {

        return true;

    }

    @Override

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

        Geometry geom = this.getGeom(args, 0);

        int srid = this.getInt(args, 1);

        IProjection proj = CRSFactory.getCRS("EPSG:"+srid);

        if( proj==null ) {

            throw new ExpressionRuntimeException("Invalid SRID '"+srid+"'.");

        }

        geom.setProjection(proj);

        return geom;

    }

}