| /* |
| * 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.parquet; |
| |
| import static org.junit.Assert.assertArrayEquals; |
| import static org.junit.Assert.assertEquals; |
| |
| import java.math.BigInteger; |
| import java.util.Arrays; |
| |
| import org.apache.parquet.io.api.Binary; |
| import org.apache.parquet.schema.PrimitiveType; |
| import org.junit.Test; |
| |
| /** |
| * Some utility methods for generating Binary values that length if fixed (e.g. for FIXED_LEN_BYTE_ARRAY or INT96). |
| */ |
| public class FixedBinaryTestUtils { |
| public static Binary getFixedBinary(int length, BigInteger bigInt) { |
| byte[] array = bigInt.toByteArray(); |
| if (array.length == length) { |
| return Binary.fromConstantByteArray(array); |
| } else if (array.length < length) { |
| byte[] padded = new byte[length]; |
| int paddingLength = length - array.length; |
| if (bigInt.signum() < 0) { |
| Arrays.fill(padded, 0, paddingLength, (byte) 0xFF); |
| } else { |
| Arrays.fill(padded, 0, paddingLength, (byte) 0x00); |
| } |
| System.arraycopy(array, 0, padded, paddingLength, array.length); |
| return Binary.fromConstantByteArray(padded); |
| } else { |
| throw new IllegalArgumentException( |
| "Specified BigInteger (" + bigInt + ") is too long for fixed bytes (" + array.length + '>' + length + ')'); |
| } |
| } |
| |
| public static Binary getFixedBinary(PrimitiveType type, BigInteger bigInt) { |
| switch (type.getPrimitiveTypeName()) { |
| case FIXED_LEN_BYTE_ARRAY: |
| return getFixedBinary(type.getTypeLength(), bigInt); |
| case INT96: |
| return getFixedBinary(12, bigInt); |
| case BINARY: |
| return Binary.fromConstantByteArray(bigInt.toByteArray()); |
| default: |
| throw new IllegalArgumentException("Type " + type + " cannot be represented by a Binary"); |
| } |
| } |
| |
| @Test |
| public void testGetFixedBinary() { |
| assertArrayEquals(b(0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x80, 0x00, 0x00, 0x00), |
| getFixedBinary(10, BigInteger.valueOf(Integer.MIN_VALUE)).getBytes()); |
| assertArrayEquals(b(0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF), |
| getFixedBinary(11, BigInteger.valueOf(-1)).getBytes()); |
| assertArrayEquals(b(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00), |
| getFixedBinary(12, BigInteger.valueOf(0)).getBytes()); |
| assertArrayEquals(b(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01), |
| getFixedBinary(13, BigInteger.valueOf(1)).getBytes()); |
| assertArrayEquals(b(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7F, 0xFF, 0xFF, 0xFF), |
| getFixedBinary(14, BigInteger.valueOf(Integer.MAX_VALUE)).getBytes()); |
| } |
| |
| public void assertCorrectBytes(byte[] expectedBytes, int length, BigInteger bigInt) { |
| byte[] actualBytes = getFixedBinary(length, bigInt).getBytes(); |
| assertArrayEquals(expectedBytes, actualBytes); |
| assertEquals(bigInt, new BigInteger(actualBytes)); |
| } |
| |
| private static byte[] b(int... bytes) { |
| byte[] arr = new byte[bytes.length]; |
| for (int i = 0, n = arr.length; i < n; ++i) { |
| arr[i] = (byte) bytes[i]; |
| } |
| return arr; |
| } |
| } |