// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root. package com.yahoo.search.grouping.request; import java.util.List; /** * This class represents a min-function in a {@link GroupingExpression}. It evaluates to a number that equals the * smallest of the results of all arguments. * * @author Simon Thoresen */ public class MinFunction extends FunctionNode { /** * Constructs a new instance of this class. * * @param arg1 The first compulsory argument, must evaluate to a number. * @param arg2 The second compulsory argument, must evaluate to a number. * @param argN The optional arguments, must evaluate to a number. */ public MinFunction(GroupingExpression arg1, GroupingExpression arg2, GroupingExpression... argN) { this(asList(arg1, arg2, argN)); } private MinFunction(List args) { super("min", args); } /** * Constructs a new instance of this class from a list of arguments. * * @param args The arguments to pass to the constructor. * @return The created instance. * @throws IllegalArgumentException Thrown if the number of arguments is less than 2. */ public static MinFunction newInstance(List args) { if (args.size() < 2) { throw new IllegalArgumentException("Expected 2 or more arguments, got " + args.size() + "."); } return new MinFunction(args); } }