org.apache.hadoop.record
Class Record

java.lang.Object
  org.apache.hadoop.record.Record

All Implemented Interfaces:

Cloneable, Comparable, Writable, WritableComparable

Direct Known Subclasses:

RecordTypeInfo

public abstract class Record
extends Object
implements WritableComparable, Cloneable

Abstract class that is extended by generated classes.

Constructor Summary

Record()

Method Summary

abstract int	compareTo(Object peer)
void	deserialize(RecordInput rin) Deserialize a record without a tag
abstract void	deserialize(RecordInput rin, String tag) Deserialize a record with a tag (usually field name)
void	readFields(DataInput din) Deserialize the fields of this object from in.
void	serialize(RecordOutput rout) Serialize a record without a tag
abstract void	serialize(RecordOutput rout, String tag) Serialize a record with tag (ususally field name)
String	toString()
void	write(DataOutput out) Serialize the fields of this object to out.

Methods inherited from class java.lang.Object

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

Constructor Detail

Record

public Record()

Method Detail

serialize

public abstract void serialize(RecordOutput rout,
                               String tag)
                        throws IOException

Serialize a record with tag (ususally field name)

Parameters:

rout - Record output destination

tag - record tag (Used only in tagged serialization e.g. XML)

Throws:

IOException

deserialize

public abstract void deserialize(RecordInput rin,
                                 String tag)
                          throws IOException

Deserialize a record with a tag (usually field name)

Parameters:

rin - Record input source

tag - Record tag (Used only in tagged serialization e.g. XML)

Throws:

IOException

compareTo

public abstract int compareTo(Object peer)
                       throws ClassCastException

Specified by:

compareTo in interface Comparable

Throws:

ClassCastException

serialize

public void serialize(RecordOutput rout)
               throws IOException

Serialize a record without a tag

Parameters:

rout - Record output destination

Throws:

IOException

deserialize

public void deserialize(RecordInput rin)
                 throws IOException

Deserialize a record without a tag

Parameters:

rin - Record input source

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

Serialize the fields of this object to out.

Specified by:

write in interface Writable

Parameters:

out - DataOuput to serialize this object into.

Throws:

IOException

readFields

public void readFields(DataInput din)
                throws IOException

Description copied from interface: Writable

Deserialize the fields of this object from in.

For efficiency, implementations should attempt to re-use storage in the existing object where possible.

Specified by:

readFields in interface Writable

Parameters:

din - DataInput to deseriablize this object from.

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object