| /* |
| * 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.lucene.codecs.lucene50; |
| |
| |
| import static org.apache.lucene.codecs.lucene50.Lucene50PostingsFormat.BLOCK_SIZE; |
| import static org.apache.lucene.codecs.lucene50.ForUtil.MAX_DATA_SIZE; |
| import static org.apache.lucene.codecs.lucene50.ForUtil.MAX_ENCODED_SIZE; |
| |
| import java.io.IOException; |
| |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.store.IOContext; |
| import org.apache.lucene.store.IndexInput; |
| import org.apache.lucene.store.IndexOutput; |
| import org.apache.lucene.store.RAMDirectory; |
| import org.apache.lucene.util.ArrayUtil; |
| import org.apache.lucene.util.LuceneTestCase; |
| import org.apache.lucene.util.packed.PackedInts; |
| |
| import com.carrotsearch.randomizedtesting.generators.RandomNumbers; |
| |
| public class TestForUtil extends LuceneTestCase { |
| |
| public void testEncodeDecode() throws IOException { |
| final int iterations = RandomNumbers.randomIntBetween(random(), 1, 1000); |
| final float acceptableOverheadRatio = random().nextFloat(); |
| final int[] values = new int[iterations * BLOCK_SIZE]; |
| for (int i = 0; i < iterations; ++i) { |
| final int bpv = random().nextInt(32); |
| if (bpv == 0) { |
| final int value = RandomNumbers.randomIntBetween(random(), 0, Integer.MAX_VALUE); |
| for (int j = 0; j < BLOCK_SIZE; ++j) { |
| values[i * BLOCK_SIZE + j] = value; |
| } |
| } else { |
| for (int j = 0; j < BLOCK_SIZE; ++j) { |
| values[i * BLOCK_SIZE + j] = RandomNumbers.randomIntBetween(random(), |
| 0, (int) PackedInts.maxValue(bpv)); |
| } |
| } |
| } |
| |
| final Directory d = new RAMDirectory(); |
| final long endPointer; |
| |
| { |
| // encode |
| IndexOutput out = d.createOutput("test.bin", IOContext.DEFAULT); |
| final ForUtil forUtil = new ForUtil(acceptableOverheadRatio, out); |
| |
| for (int i = 0; i < iterations; ++i) { |
| // Although values after BLOCK_SIZE are garbage, we need to allocate extra bytes to avoid AIOOBE. |
| int[] block = ArrayUtil.grow(ArrayUtil.copyOfSubArray(values, i*BLOCK_SIZE, (i+1)*BLOCK_SIZE)); |
| forUtil.writeBlock(ArrayUtil.grow(block, MAX_DATA_SIZE), new byte[MAX_ENCODED_SIZE], out); |
| } |
| endPointer = out.getFilePointer(); |
| out.close(); |
| } |
| |
| { |
| // decode |
| IndexInput in = d.openInput("test.bin", IOContext.READONCE); |
| final ForUtil forUtil = new ForUtil(in); |
| for (int i = 0; i < iterations; ++i) { |
| if (random().nextBoolean()) { |
| forUtil.skipBlock(in); |
| continue; |
| } |
| final int[] restored = new int[MAX_DATA_SIZE]; |
| forUtil.readBlock(in, new byte[MAX_ENCODED_SIZE], restored); |
| assertArrayEquals(ArrayUtil.copyOfSubArray(values, i*BLOCK_SIZE, (i+1)*BLOCK_SIZE), |
| ArrayUtil.copyOfSubArray(restored, 0, BLOCK_SIZE)); |
| } |
| assertEquals(endPointer, in.getFilePointer()); |
| in.close(); |
| } |
| |
| d.close(); |
| } |
| |
| } |