| /******************************************************************** |
| * 2014 - |
| * open source under Apache License Version 2.0 |
| ********************************************************************/ |
| /** |
| * 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. |
| */ |
| #include "FileSystemImpl.h" |
| #include "FileSystemInter.h" |
| #include "InputStream.h" |
| #include "InputStreamImpl.h" |
| #include "InputStreamInter.h" |
| |
| using namespace Hdfs::Internal; |
| |
| namespace Hdfs { |
| |
| InputStream::InputStream() { |
| impl = new Internal::InputStreamImpl; |
| } |
| |
| InputStream::~InputStream() { |
| delete impl; |
| } |
| |
| /** |
| * Open a file to read |
| * @param fs hdfs file system. |
| * @param path the file to be read. |
| * @param verifyChecksum verify the checksum. |
| */ |
| void InputStream::open(FileSystem & fs, const char * path, |
| bool verifyChecksum) { |
| if (!fs.impl) { |
| THROW(HdfsIOException, "FileSystem: not connected."); |
| } |
| |
| impl->open(fs.impl->filesystem, path, verifyChecksum); |
| } |
| |
| /** |
| * To read data from hdfs. |
| * @param buf the buffer used to filled. |
| * @param size buffer size. |
| * @return return the number of bytes filled in the buffer, it may less than size. |
| */ |
| int32_t InputStream::read(char * buf, int32_t size) { |
| return impl->read(buf, size); |
| } |
| |
| /** |
| * To read data from hdfs, block until get the given size of bytes. |
| * @param buf the buffer used to filled. |
| * @param size the number of bytes to be read. |
| */ |
| void InputStream::readFully(char * buf, int64_t size) { |
| impl->readFully(buf, size); |
| } |
| |
| int64_t InputStream::available() { |
| return impl->available(); |
| } |
| |
| /** |
| * To move the file point to the given position. |
| * @param pos the given position. |
| */ |
| void InputStream::seek(int64_t pos) { |
| impl->seek(pos); |
| } |
| |
| /** |
| * To get the current file point position. |
| * @return the position of current file point. |
| */ |
| int64_t InputStream::tell() { |
| return impl->tell(); |
| } |
| |
| /** |
| * Close the sthream. |
| */ |
| void InputStream::close() { |
| impl->close(); |
| } |
| |
| } |