| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.pig.builtin; |
| |
| import java.math.BigInteger; |
| import java.util.Random; |
| |
| /** |
| * Max and min seeds cannot be defined to BigInteger as the value could go as large as |
| * The computer allows. This wrapper is used to provide seed for MIN and MAX functions |
| * in AlgrebraicBigIntegerMathBase.java |
| */ |
| |
| public class BigIntegerWrapper extends BigInteger { |
| private static final long serialVersionUID = 1L; |
| |
| private enum BigIntegerInfinity{ |
| NEGATIVE_INFINITY, |
| POSITIVE_INFINITY |
| } |
| |
| private BigIntegerInfinity infinity; |
| |
| // BigInteger constructors initialized to keep compiler happy |
| public BigIntegerWrapper(byte[] val) { |
| super(val); |
| } |
| |
| public BigIntegerWrapper(int signum, byte[] magnitude) { |
| super(signum, magnitude); |
| } |
| |
| public BigIntegerWrapper(int bitLength, int certainty, Random rnd) { |
| super(bitLength, certainty, rnd); |
| } |
| |
| public BigIntegerWrapper(int numBits, Random rnd) { |
| super(numBits, rnd); |
| } |
| |
| public BigIntegerWrapper(String val) { |
| super(val); |
| } |
| |
| public BigIntegerWrapper(String val, int radix) { |
| super(val, radix); |
| } |
| |
| private BigIntegerWrapper(BigIntegerInfinity in) { |
| super("0"); |
| infinity = in; |
| } |
| |
| public boolean isPositiveInfinity() { |
| return (infinity==BigIntegerInfinity.POSITIVE_INFINITY); |
| } |
| |
| public boolean isNegativeInfinity() { |
| return (infinity==BigIntegerInfinity.NEGATIVE_INFINITY); |
| } |
| |
| static public BigIntegerWrapper NEGATIVE_INFINITY() { |
| return new BigIntegerWrapper(BigIntegerInfinity.NEGATIVE_INFINITY); |
| } |
| |
| static public BigIntegerWrapper POSITIVE_INFINITY() { |
| return new BigIntegerWrapper(BigIntegerInfinity.POSITIVE_INFINITY); |
| } |
| } |