/**
* 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.tez.common.io;
import java.io.ByteArrayInputStream;
/**
* A thread-not-safe version of ByteArrayInputStream, which removes all
* synchronized modifiers.
*/
public class NonSyncByteArrayInputStream extends ByteArrayInputStream {
public NonSyncByteArrayInputStream(byte[] bs) {
super(bs);
}
public NonSyncByteArrayInputStream(byte[] buf, int offset, int length) {
super(buf, offset, length);
}
/**
* {@inheritDoc}
*/
@Override
public int read() {
return (pos < count) ? (buf[pos++] & 0xff) : -1;
}
/**
* {@inheritDoc}
*/
@Override
public int read(byte b[], int off, int len) {
if (b == null) {
throw new NullPointerException();
} else if (off < 0 || len < 0 || len > b.length - off) {
throw new IndexOutOfBoundsException();
}
if (pos >= count) {
return -1;
}
int avail = count - pos;
if (len > avail) {
len = avail;
}
if (len <= 0) {
return 0;
}
System.arraycopy(buf, pos, b, off, len);
pos += len;
return len;
}
/**
* {@inheritDoc}
*/
@Override
public long skip(long n) {
long k = count - pos;
if (n < k) {
k = n < 0 ? 0 : n;
}
pos += k;
return k;
}
/**
* {@inheritDoc}
*/
@Override
public int available() {
return count - pos;
}
/**
* {@inheritDoc}
*/
@Override
public void reset() {
pos = mark;
}
}