--- /dev/null
+package org.apache.lucene.store;
+
+/**
+ * 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.
+ */
+
+import java.io.IOException;
+
+import org.apache.lucene.util.LuceneTestCase;
+import org.apache.lucene.util._TestUtil;
+
+import org.junit.Test;
+
+public class TestCopyBytes extends LuceneTestCase {
+
+ private byte value(int idx) {
+ return (byte) ((idx%256) * (1+(idx/256)));
+ }
+
+
+ @Test
+ public void testCopyBytes() throws Exception {
+ int num = atLeast(10);
+ for(int iter=0;iter<num;iter++) {
+ Directory dir = newDirectory();
+ if (VERBOSE) {
+ System.out.println("TEST: iter=" + iter + " dir=" + dir);
+ }
+
+ // make random file
+ IndexOutput out = dir.createOutput("test");
+ byte[] bytes = new byte[_TestUtil.nextInt(random, 1, 77777)];
+ final int size = _TestUtil.nextInt(random, 1, 1777777);
+ int upto = 0;
+ int byteUpto = 0;
+ while(upto < size) {
+ bytes[byteUpto++] = value(upto);
+ upto++;
+ if (byteUpto == bytes.length) {
+ out.writeBytes(bytes, 0, bytes.length);
+ byteUpto = 0;
+ }
+ }
+
+ out.writeBytes(bytes, 0, byteUpto);
+ assertEquals(size, out.getFilePointer());
+ out.close();
+ assertEquals(size, dir.fileLength("test"));
+
+ // copy from test -> test2
+ final IndexInput in = dir.openInput("test");
+
+ out = dir.createOutput("test2");
+
+ upto = 0;
+ while(upto < size) {
+ if (random.nextBoolean()) {
+ out.writeByte(in.readByte());
+ upto++;
+ } else {
+ final int chunk = Math.min(_TestUtil.nextInt(random, 1, bytes.length), size-upto);
+ out.copyBytes(in, chunk);
+ upto += chunk;
+ }
+ }
+ assertEquals(size, upto);
+ out.close();
+ in.close();
+
+ // verify
+ IndexInput in2 = dir.openInput("test2");
+ upto = 0;
+ while(upto < size) {
+ if (random.nextBoolean()) {
+ final byte v = in2.readByte();
+ assertEquals(value(upto), v);
+ upto++;
+ } else {
+ final int limit = Math.min(_TestUtil.nextInt(random, 1, bytes.length), size-upto);
+ in2.readBytes(bytes, 0, limit);
+ for(int byteIdx=0;byteIdx<limit;byteIdx++) {
+ assertEquals(value(upto), bytes[byteIdx]);
+ upto++;
+ }
+ }
+ }
+ in2.close();
+
+ dir.deleteFile("test");
+ dir.deleteFile("test2");
+
+ dir.close();
+ }
+ }
+
+ // LUCENE-3541
+ public void testCopyBytesWithThreads() throws Exception {
+ int datalen = _TestUtil.nextInt(random, 101, 10000);
+ byte data[] = new byte[datalen];
+ random.nextBytes(data);
+
+ Directory d = newDirectory();
+ IndexOutput output = d.createOutput("data");
+ output.writeBytes(data, 0, datalen);
+ output.close();
+
+ IndexInput input = d.openInput("data");
+ IndexOutput outputHeader = d.createOutput("header");
+ // copy our 100-byte header
+ input.copyBytes(outputHeader, 100);
+ outputHeader.close();
+
+ // now make N copies of the remaining bytes
+ CopyThread copies[] = new CopyThread[10];
+ for (int i = 0; i < copies.length; i++) {
+ copies[i] = new CopyThread((IndexInput) input.clone(), d.createOutput("copy" + i));
+ }
+
+ for (int i = 0; i < copies.length; i++) {
+ copies[i].start();
+ }
+
+ for (int i = 0; i < copies.length; i++) {
+ copies[i].join();
+ }
+
+ for (int i = 0; i < copies.length; i++) {
+ IndexInput copiedData = d.openInput("copy" + i);
+ byte[] dataCopy = new byte[datalen];
+ System.arraycopy(data, 0, dataCopy, 0, 100); // copy the header for easy testing
+ copiedData.readBytes(dataCopy, 100, datalen-100);
+ assertArrayEquals(data, dataCopy);
+ copiedData.close();
+ }
+ input.close();
+ d.close();
+
+ }
+
+ static class CopyThread extends Thread {
+ final IndexInput src;
+ final IndexOutput dst;
+
+ CopyThread(IndexInput src, IndexOutput dst) {
+ this.src = src;
+ this.dst = dst;
+ }
+
+ @Override
+ public void run() {
+ try {
+ src.copyBytes(dst, src.length()-100);
+ dst.close();
+ } catch (IOException ex) {
+ throw new RuntimeException(ex);
+ }
+ }
+ }
+}