org.apache.activemq.transport.nio.NIOInputStream Maven / Gradle / Ivy
/**
* 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 {
}
}