org.apache.hadoop.record
Interface RecordInput

All Known Implementing Classes:

BinaryRecordInput, CsvRecordInput, XmlRecordInput

public interface RecordInput

Interface that all the Deserializers have to implement.

Method Summary

void	endMap(String tag) Check the mark for end of the serialized map.
void	endRecord(String tag) Check the mark for end of the serialized record.
void	endVector(String tag) Check the mark for end of the serialized vector.
boolean	readBool(String tag) Read a boolean from serialized record.
Buffer	readBuffer(String tag) Read byte array from serialized record.
byte	readByte(String tag) Read a byte from serialized record.
double	readDouble(String tag) Read a double-precision number from serialized record.
float	readFloat(String tag) Read a single-precision float from serialized record.
int	readInt(String tag) Read an integer from serialized record.
long	readLong(String tag) Read a long integer from serialized record.
String	readString(String tag) Read a UTF-8 encoded string from serialized record.
Index	startMap(String tag) Check the mark for start of the serialized map.
void	startRecord(String tag) Check the mark for start of the serialized record.
Index	startVector(String tag) Check the mark for start of the serialized vector.

Method Detail

readByte

byte readByte(String tag)
              throws IOException

Read a byte from serialized record.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Returns:

value read from serialized record.

Throws:

IOException

readBool

boolean readBool(String tag)
                 throws IOException

Read a boolean from serialized record.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Returns:

value read from serialized record.

Throws:

IOException

readInt

int readInt(String tag)
            throws IOException

Read an integer from serialized record.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Returns:

value read from serialized record.

Throws:

IOException

readLong

long readLong(String tag)
              throws IOException

Read a long integer from serialized record.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Returns:

value read from serialized record.

Throws:

IOException

readFloat

float readFloat(String tag)
                throws IOException

Read a single-precision float from serialized record.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Returns:

value read from serialized record.

Throws:

IOException

readDouble

double readDouble(String tag)
                  throws IOException

Read a double-precision number from serialized record.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Returns:

value read from serialized record.

Throws:

IOException

readString

String readString(String tag)
                  throws IOException

Read a UTF-8 encoded string from serialized record.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Returns:

value read from serialized record.

Throws:

IOException

readBuffer

Buffer readBuffer(String tag)
                  throws IOException

Read byte array from serialized record.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Returns:

value read from serialized record.

Throws:

IOException

startRecord

void startRecord(String tag)
                 throws IOException

Check the mark for start of the serialized record.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Throws:

IOException

endRecord

void endRecord(String tag)
               throws IOException

Check the mark for end of the serialized record.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Throws:

IOException

startVector

Index startVector(String tag)
                  throws IOException

Check the mark for start of the serialized vector.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Returns:

Index that is used to count the number of elements.

Throws:

IOException

endVector

void endVector(String tag)
               throws IOException

Check the mark for end of the serialized vector.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Throws:

IOException

startMap

Index startMap(String tag)
               throws IOException

Check the mark for start of the serialized map.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Returns:

Index that is used to count the number of map entries.

Throws:

IOException

endMap

void endMap(String tag)
            throws IOException

Check the mark for end of the serialized map.

Parameters:

tag - Used by tagged serialization formats (such as XML)

Throws:

IOException