| /* |
| * 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.thrift.transport; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| /** |
| * This is the most commonly used base transport. It takes an InputStream |
| * and an OutputStream and uses those to perform all transport operations. |
| * This allows for compatibility with all the nice constructs Java already |
| * has to provide a variety of types of streams. |
| * |
| */ |
| public class TIOStreamTransport extends TTransport { |
| |
| |
| /** Underlying inputStream */ |
| protected InputStream inputStream_ = null; |
| |
| /** Underlying outputStream */ |
| protected OutputStream outputStream_ = null; |
| |
| /** |
| * Subclasses can invoke the default constructor and then assign the input |
| * streams in the open method. |
| */ |
| protected TIOStreamTransport() {} |
| |
| /** |
| * Input stream constructor. |
| * |
| * @param is Input stream to read from |
| */ |
| public TIOStreamTransport(InputStream is) { |
| inputStream_ = is; |
| } |
| |
| /** |
| * Output stream constructor. |
| * |
| * @param os Output stream to read from |
| */ |
| public TIOStreamTransport(OutputStream os) { |
| outputStream_ = os; |
| } |
| |
| /** |
| * Two-way stream constructor. |
| * |
| * @param is Input stream to read from |
| * @param os Output stream to read from |
| */ |
| public TIOStreamTransport(InputStream is, OutputStream os) { |
| inputStream_ = is; |
| outputStream_ = os; |
| } |
| |
| /** |
| * The streams must already be open at construction time, so this should |
| * always return true. |
| * |
| * @return true |
| */ |
| public boolean isOpen() { |
| return true; |
| } |
| |
| /** |
| * The streams must already be open. This method does nothing. |
| */ |
| public void open() throws TTransportException {} |
| |
| /** |
| * Closes both the input and output streams. |
| */ |
| public void close() { |
| if (inputStream_ != null) { |
| try { |
| inputStream_.close(); |
| } catch (IOException iox) { |
| } |
| inputStream_ = null; |
| } |
| if (outputStream_ != null) { |
| try { |
| outputStream_.close(); |
| } catch (IOException iox) { |
| } |
| outputStream_ = null; |
| } |
| } |
| |
| /** |
| * Reads from the underlying input stream if not null. |
| */ |
| public int read(byte[] buf, int off, int len) throws TTransportException { |
| if (inputStream_ == null) { |
| throw new TTransportException(TTransportException.NOT_OPEN, "Cannot read from null inputStream"); |
| } |
| try { |
| return inputStream_.read(buf, off, len); |
| } catch (IOException iox) { |
| throw new TTransportException(TTransportException.UNKNOWN, iox); |
| } |
| } |
| |
| /** |
| * Writes to the underlying output stream if not null. |
| */ |
| public void write(byte[] buf, int off, int len) throws TTransportException { |
| if (outputStream_ == null) { |
| throw new TTransportException(TTransportException.NOT_OPEN, "Cannot write to null outputStream"); |
| } |
| try { |
| outputStream_.write(buf, off, len); |
| } catch (IOException iox) { |
| throw new TTransportException(TTransportException.UNKNOWN, iox); |
| } |
| } |
| |
| /** |
| * Flushes the underlying output stream if not null. |
| */ |
| public void flush() throws TTransportException { |
| if (outputStream_ == null) { |
| throw new TTransportException(TTransportException.NOT_OPEN, "Cannot flush null outputStream"); |
| } |
| try { |
| outputStream_.flush(); |
| } catch (IOException iox) { |
| throw new TTransportException(TTransportException.UNKNOWN, iox); |
| } |
| } |
| } |