--- /dev/null
+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,
+ * 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.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;
+ }
+
+ @Override
+ 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;
+ }
+
+ @Override
+ public void close() {
+ // ignore
+ }
+
+ @Override
+ protected void seekInternal(long pos) {
+ pointer = (int) pos;
+ }
+
+ @Override
+ public long length() {
+ return length;
+ }
+
+}