| /** |
| * 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.activemq.transport.nio; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.BufferUnderflowException; |
| import java.nio.ByteBuffer; |
| |
| /** |
| * An optimized buffered input stream for Tcp |
| * |
| * |
| */ |
| public class NIOInputStream extends InputStream { |
| |
| protected int count; |
| protected int position; |
| private final ByteBuffer in; |
| |
| public NIOInputStream(ByteBuffer in) { |
| this.in = in; |
| } |
| |
| public int read() throws IOException { |
| try { |
| int rc = in.get() & 0xff; |
| return rc; |
| } catch (BufferUnderflowException e) { |
| return -1; |
| } |
| } |
| |
| public int read(byte b[], int off, int len) throws IOException { |
| if (in.hasRemaining()) { |
| int rc = Math.min(len, in.remaining()); |
| in.get(b, off, rc); |
| return rc; |
| } else { |
| return len == 0 ? 0 : -1; |
| } |
| } |
| |
| public long skip(long n) throws IOException { |
| int rc = Math.min((int)n, in.remaining()); |
| in.position(in.position() + rc); |
| return rc; |
| } |
| |
| public int available() throws IOException { |
| return in.remaining(); |
| } |
| |
| public boolean markSupported() { |
| return false; |
| } |
| |
| public void close() throws IOException { |
| } |
| } |