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Lucene example source code file (MockIndexInput.java)

This example Lucene source code file (MockIndexInput.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

bufferedindexinput, bufferedindexinput, mockindexinput, mockindexinput, override, override

The Lucene MockIndexInput.java source code

package org.apache.lucene.index;

 * 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.

import org.apache.lucene.store.BufferedIndexInput;

public class MockIndexInput extends BufferedIndexInput {
    private byte[] buffer;
    private int pointer = 0;
    private long length;

    public MockIndexInput(byte[] bytes) {
        buffer = bytes;
        length = bytes.length;

    protected void readInternal(byte[] dest, int destOffset, int len) {
        int remainder = len;
        int start = pointer;
        while (remainder != 0) {
//          int bufferNumber = start / buffer.length;
          int bufferOffset = start % buffer.length;
          int bytesInBuffer = buffer.length - bufferOffset;
          int bytesToCopy = bytesInBuffer >= remainder ? remainder : bytesInBuffer;
          System.arraycopy(buffer, bufferOffset, dest, destOffset, bytesToCopy);
          destOffset += bytesToCopy;
          start += bytesToCopy;
          remainder -= bytesToCopy;
        pointer += len;

    public void close() {
        // ignore

    protected void seekInternal(long pos) {
        pointer = (int) pos;

    public long length() {
      return length;


Other Lucene examples (source code examples)

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