org.apache.hadoop.mapreduce.lib.db

类 DBInputFormat.NullDBWritable

java.lang.Object

org.apache.hadoop.mapreduce.lib.db.DBInputFormat.NullDBWritable

所有已实现的接口:

Writable, DBWritable

封闭类:

DBInputFormat<T extends DBWritable>

@InterfaceStability.Evolving
public static class DBInputFormat.NullDBWritable
extends Object
implements DBWritable, Writable

A Class that does nothing, implementing DBWritable

构造器概要

构造器

构造器和说明
DBInputFormat.NullDBWritable()

方法概要

方法

限定符和类型	方法和说明
void	readFields(DataInput in) Deserialize the fields of this object from in.
void	readFields(ResultSet arg0) Reads the fields of the object from the ResultSet.
void	write(DataOutput out) Serialize the fields of this object to out.
void	write(PreparedStatement arg0) Sets the fields of the object in the PreparedStatement.

从类继承的方法 java.lang.Object

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

构造器详细资料

DBInputFormat.NullDBWritable

public DBInputFormat.NullDBWritable()

方法详细资料

readFields

public void readFields(DataInput in)
                throws IOException

从接口复制的说明: Writable

Deserialize the fields of this object from in.

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

指定者:

readFields 在接口中 Writable

参数:

in - DataInput to deseriablize this object from.

抛出:

IOException

readFields

public void readFields(ResultSet arg0)
                throws SQLException

从接口复制的说明: DBWritable

Reads the fields of the object from the ResultSet.

指定者:

readFields 在接口中 DBWritable

参数:

arg0 - the ResultSet to get the fields from.

抛出:

SQLException

write

public void write(DataOutput out)
           throws IOException

从接口复制的说明: Writable

Serialize the fields of this object to out.

指定者:

write 在接口中 Writable

参数:

out - DataOuput to serialize this object into.

抛出:

IOException

write

public void write(PreparedStatement arg0)
           throws SQLException

从接口复制的说明: DBWritable

Sets the fields of the object in the PreparedStatement.

指定者:

write 在接口中 DBWritable

参数:

arg0 - the statement that the fields are put into.

抛出:

SQLException