Application: gvSIG desktop

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

import org.apache.commons.lang3.Range;

import org.apache.commons.lang3.StringUtils;

import org.gvsig.expressionevaluator.Interpreter;

import org.gvsig.expressionevaluator.spi.AbstractFunction;

public class LocateFunction extends AbstractFunction {

    public LocateFunction() {

        super("String", "LOCATE", Range.between(2,3));

    }

    @Override

    public boolean allowConstantFolding() {

        return true;

    }

    @Override

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

        int start = 0;

        String search = getStr(args,0);

        String str = getStr(args,1);

        if( args.length==2 ) {

            start = getInt(args, 2);

        }

        int r = StringUtils.indexOf(str, search, start);

        return r;

    }

}