Application: gvSIG desktop

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

import org.apache.commons.lang3.Range;

import org.gvsig.expressionevaluator.Interpreter;

import org.gvsig.expressionevaluator.spi.AbstractFunction;

public class InstrFunction extends AbstractFunction {

    public InstrFunction() {

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

    }

    @Override

    public boolean allowConstantFolding() {

        return true;

    }

    @Override

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

        String str = getStr(args, 0);

        String search = getStr(args, 1);

        int start = 0;

        if( args.length == 3 ) {

            start = getInt(args, 2);

        }

        return str.indexOf(search, start);

    }

}