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Lucene example source code file (TestCopyBytes.java)

This example Lucene source code file (TestCopyBytes.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lucene tags/keywords

directory, exception, indexinput, indexinput, indexoutput, lucenetestcase, lucenetestcase, test, test, testcopybytes, verbose, verbose

The Lucene TestCopyBytes.java source code

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 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();
    }
  }
}

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