| /* |
| * 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.drill.exec.vector.complex.fn; |
| |
| import io.netty.buffer.ByteBufInputStream; |
| import io.netty.buffer.DrillBuf; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.fs.Seekable; |
| |
| /** |
| * An InputStream that wraps a DrillBuf and implements the seekable interface. |
| */ |
| public class DrillBufInputStream extends ByteBufInputStream implements Seekable { |
| //private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(DrillBufInputStream.class); |
| |
| private final DrillBuf buffer; |
| |
| private DrillBufInputStream(DrillBuf buffer, int len) { |
| super(buffer, len); |
| this.buffer = buffer; |
| } |
| |
| @Override |
| public void seek(long pos) throws IOException { |
| buffer.readerIndex((int) pos); |
| } |
| |
| @Override |
| public long getPos() throws IOException { |
| return buffer.readerIndex(); |
| } |
| |
| @Override |
| public boolean seekToNewSource(long targetPos) throws IOException { |
| return false; |
| } |
| |
| // Does not adopt the buffer |
| public static DrillBufInputStream getStream(int start, int end, DrillBuf buffer) { |
| DrillBuf buf = buffer.slice(start, end - start); |
| return new DrillBufInputStream(buf, end - start); |
| } |
| } |