com.clearspring.analytics.stream.membership.DataInputBuffer 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 com.clearspring.analytics.stream.membership;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
/**
* An implementation of the DataInputStream interface. This instance is completely thread
* unsafe.
*/
public final class DataInputBuffer extends DataInputStream {
private static class Buffer extends ByteArrayInputStream {
public Buffer() {
super(new byte[]{});
}
public void reset(byte[] input, int start, int length) {
this.buf = input;
this.count = start + length;
this.mark = start;
this.pos = start;
}
public int getPosition() {
return pos;
}
public void setPosition(int position) {
pos = position;
}
public int getLength() {
return count;
}
}
private Buffer buffer_;
/**
* Constructs a new empty buffer.
*/
public DataInputBuffer() {
this(new Buffer());
}
private DataInputBuffer(Buffer buffer) {
super(buffer);
this.buffer_ = buffer;
}
/**
* Resets the data that the buffer reads.
*/
public void reset(byte[] input, int length) {
buffer_.reset(input, 0, length);
}
/**
* Resets the data that the buffer reads.
*/
public void reset(byte[] input, int start, int length) {
buffer_.reset(input, start, length);
}
/**
* Returns the length of the input.
*/
public int getLength() {
return buffer_.getLength();
}
public int getPosition() {
return buffer_.getPosition();
}
}