Application: gvSIG desktop

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

import org.apache.commons.lang3.Range;

import static org.gvsig.expressionevaluator.ExpressionBuilder.FUNCTION_LOWER;

import org.gvsig.expressionevaluator.Interpreter;

import org.gvsig.expressionevaluator.spi.AbstractFunction;

public class LowerFunction extends AbstractFunction {

    public LowerFunction() {

        super("String", FUNCTION_LOWER, Range.is(1));

        this.addAlias("LCASE");

        this.addAlias("toLowerCase");

    }

    @Override

    public boolean allowConstantFolding() {

        return true;

    }

    @Override

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

        String str = getStr(args,0);

        return str.toLowerCase();

    }

}