simpleresolver.java

来自「数据仓库展示程序」· Java 代码 · 共 75 行

/*
// $Id: //open/mondrian/src/main/mondrian/olap/fun/SimpleResolver.java#10 $
// This software is subject to the terms of the Common Public License
// Agreement, available at the following URL:
// http://www.opensource.org/licenses/cpl.html.
// (C) Copyright 2002-2005 Kana Software, Inc. and others.
// All Rights Reserved.
// You must accept the terms of that agreement to use this software.
//
// jhyde, 3 March, 2002
*/
package mondrian.olap.fun;

import mondrian.olap.*;

/**
 * A <code>SimpleResolver</code> resolves a single, non-overloaded function.
 *
 * @author jhyde
 * @since 3 March, 2002
 * @version $Id: //open/mondrian/src/main/mondrian/olap/fun/SimpleResolver.java#10 $
 **/
class SimpleResolver implements Resolver {
    private  final FunDef funDef;

    SimpleResolver(FunDef funDef) {
        this.funDef = funDef;
    }
    public FunDef getFunDef() {
        return funDef;
    }
    public String getName() {
        return funDef.getName();
    }

    public String getDescription() {
        return funDef.getDescription();
    }

    public Syntax getSyntax() {
        return funDef.getSyntax();
    }

    public String[] getReservedWords() {
        return FunUtil.emptyStringArray;
    }

    public FunDef resolve(
            Exp[] args, Validator validator, int[] conversionCount) {
        int[] parameterTypes = funDef.getParameterTypes();
        if (parameterTypes.length != args.length) {
            return null;
        }
        for (int i = 0; i < args.length; i++) {
            if (!validator.canConvert(
                    args[i], parameterTypes[i], conversionCount)) {
                return null;
            }
        }
        return funDef;
    }

    public boolean requiresExpression(int k) {
        int[] parameterTypes = funDef.getParameterTypes();
        return ((k >= parameterTypes.length) ||
               (parameterTypes[k] != Category.Set));
    }

//  public void addTests(TestSuite suite, Pattern pattern) {
//      funDef.addTests(suite, pattern);
//  }
}

// End SimpleResolver.java