001/* 002// This software is subject to the terms of the Eclipse Public License v1.0 003// Agreement, available at the following URL: 004// http://www.eclipse.org/legal/epl-v10.html. 005// You must accept the terms of that agreement to use this software. 006// 007// Copyright (C) 2006-2007 Pentaho 008// All Rights Reserved. 009*/ 010package mondrian.calc; 011 012import mondrian.olap.Evaluator; 013 014/** 015 * Compiled expression whose result is a {@link String}. 016 * 017 * <p>When implementing this interface, it is convenient to extend 018 * {@link mondrian.calc.impl.AbstractStringCalc}, but it is not required. 019 * 020 * @author jhyde 021 * @since Sep 26, 2005 022 */ 023public interface StringCalc extends Calc { 024 /** 025 * Evaluates this expression to yield a {@link String} value. 026 * 027 * @param evaluator Evaluation context 028 * @return evaluation result 029 */ 030 String evaluateString(Evaluator evaluator); 031} 032 033// End StringCalc.java