org.apache.pig.piggybank.storage

Class IndexedStorage.IndexedStorageInputFormat.IndexedStorageRecordReader.IndexedStorageLineReader

java.lang.Object

org.apache.pig.piggybank.storage.IndexedStorage.IndexedStorageInputFormat.IndexedStorageRecordReader.IndexedStorageLineReader

Enclosing class:

IndexedStorage.IndexedStorageInputFormat.IndexedStorageRecordReader

public static class IndexedStorage.IndexedStorageInputFormat.IndexedStorageRecordReader.IndexedStorageLineReader
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
IndexedStorage.IndexedStorageInputFormat.IndexedStorageRecordReader.IndexedStorageLineReader(java.io.InputStream in) Create a line reader that reads from the given stream using the default buffer-size (64k).
IndexedStorage.IndexedStorageInputFormat.IndexedStorageRecordReader.IndexedStorageLineReader(java.io.InputStream in, org.apache.hadoop.conf.Configuration conf) Create a line reader that reads from the given stream using the io.file.buffer.size specified in the given Configuration.
IndexedStorage.IndexedStorageInputFormat.IndexedStorageRecordReader.IndexedStorageLineReader(java.io.InputStream in, int bufferSize) Create a line reader that reads from the given stream using the given buffer-size.

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Close the underlying stream.
int	readLine(org.apache.hadoop.io.Text str) Read from the InputStream into the given Text.
int	readLine(org.apache.hadoop.io.Text str, int maxLineLength) Read from the InputStream into the given Text.
int	readLine(org.apache.hadoop.io.Text str, int maxLineLength, int maxBytesToConsume) Read one line from the InputStream into the given Text.
void	seek(long offset) If given offset is within the buffer, adjust the buffer position to read from otherwise seek to the given offset from start of the file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IndexedStorage.IndexedStorageInputFormat.IndexedStorageRecordReader.IndexedStorageLineReader

public IndexedStorage.IndexedStorageInputFormat.IndexedStorageRecordReader.IndexedStorageLineReader(java.io.InputStream in)

Create a line reader that reads from the given stream using the default buffer-size (64k).

Parameters:

in - The input stream

Throws:

java.io.IOException

IndexedStorage.IndexedStorageInputFormat.IndexedStorageRecordReader.IndexedStorageLineReader

public IndexedStorage.IndexedStorageInputFormat.IndexedStorageRecordReader.IndexedStorageLineReader(java.io.InputStream in,
                                                                                            int bufferSize)

Create a line reader that reads from the given stream using the given buffer-size.

Parameters:

in - The input stream

bufferSize - Size of the read buffer

Throws:

java.io.IOException

IndexedStorage.IndexedStorageInputFormat.IndexedStorageRecordReader.IndexedStorageLineReader

public IndexedStorage.IndexedStorageInputFormat.IndexedStorageRecordReader.IndexedStorageLineReader(java.io.InputStream in,
                                                                                            org.apache.hadoop.conf.Configuration conf)
                                                                                             throws java.io.IOException

Create a line reader that reads from the given stream using the io.file.buffer.size specified in the given Configuration.

Parameters:

in - input stream

conf - configuration

Throws:

java.io.IOException

Method Detail

close

public void close()
           throws java.io.IOException

Close the underlying stream.

Throws:

java.io.IOException

readLine

public int readLine(org.apache.hadoop.io.Text str,
           int maxLineLength,
           int maxBytesToConsume)
             throws java.io.IOException

Read one line from the InputStream into the given Text. A line can be terminated by one of the following: '\n' (LF) , '\r' (CR), or '\r\n' (CR+LF). EOF also terminates an otherwise unterminated line.

Parameters:

str - the object to store the given line (without newline)

maxLineLength - the maximum number of bytes to store into str; the rest of the line is silently discarded.

maxBytesToConsume - the maximum number of bytes to consume in this call. This is only a hint, because if the line cross this threshold, we allow it to happen. It can overshoot potentially by as much as one buffer length.

Returns:

the number of bytes read including the (longest) newline found.

Throws:

java.io.IOException - if the underlying stream throws

readLine

public int readLine(org.apache.hadoop.io.Text str,
           int maxLineLength)
             throws java.io.IOException

Read from the InputStream into the given Text.

Parameters:

str - the object to store the given line

maxLineLength - the maximum number of bytes to store into str.

Returns:

the number of bytes read including the newline

Throws:

java.io.IOException - if the underlying stream throws

readLine

public int readLine(org.apache.hadoop.io.Text str)
             throws java.io.IOException

Read from the InputStream into the given Text.

Parameters:

str - the object to store the given line

Returns:

the number of bytes read including the newline

Throws:

java.io.IOException - if the underlying stream throws

seek

public void seek(long offset)
          throws java.io.IOException

If given offset is within the buffer, adjust the buffer position to read from otherwise seek to the given offset from start of the file.

Parameters:

offset -

Throws:

java.io.IOException