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java.lang.Objectjava.io.InputStream
java.io.FilterInputStream
java.io.DataInputStream
org.apache.hadoop.io.DataInputBuffer
public class DataInputBuffer
A reusable DataInput implementation that reads from an in-memory
buffer.
This saves memory over creating a new DataInputStream and ByteArrayInputStream each time data is read.
Typical usage is something like the following:
DataInputBuffer buffer = new DataInputBuffer();
while (... loop condition ...) {
byte[] data = ... get data ...;
int dataLength = ... get data length ...;
buffer.reset(data, dataLength);
... read buffer using DataInput methods ...
}
| Field Summary |
|---|
| Fields inherited from class java.io.FilterInputStream |
|---|
in |
| Constructor Summary | |
|---|---|
DataInputBuffer()
Constructs a new empty buffer. |
|
| Method Summary | |
|---|---|
byte[] |
getData()
|
int |
getLength()
Returns the length of the input. |
int |
getPosition()
Returns the current position in the input. |
void |
reset(byte[] input,
int length)
Resets the data that the buffer reads. |
void |
reset(byte[] input,
int start,
int length)
Resets the data that the buffer reads. |
| Methods inherited from class java.io.DataInputStream |
|---|
read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, readUTF, skipBytes |
| Methods inherited from class java.io.FilterInputStream |
|---|
available, close, mark, markSupported, read, reset, skip |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public DataInputBuffer()
| Method Detail |
|---|
public void reset(byte[] input,
int length)
public void reset(byte[] input,
int start,
int length)
public byte[] getData()
public int getPosition()
public int getLength()
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