org.apache.hadoop.record

接口 RecordOutput

所有已知实现类:

BinaryRecordOutput, CsvRecordOutput, TypedBytesRecordOutput, XmlRecordOutput

public interface RecordOutput

Interface that alll the serializers have to implement.

方法概要

方法

限定符和类型	方法和说明
void	endMap(TreeMap m, String tag) Mark the end of a serialized map.
void	endRecord(Record r, String tag) Mark the end of a serialized record.
void	endVector(ArrayList v, String tag) Mark the end of a serialized vector.
void	startMap(TreeMap m, String tag) Mark the start of a map to be serialized.
void	startRecord(Record r, String tag) Mark the start of a record to be serialized.
void	startVector(ArrayList v, String tag) Mark the start of a vector to be serialized.
void	writeBool(boolean b, String tag) Write a boolean to serialized record.
void	writeBuffer(Buffer buf, String tag) Write a buffer to serialized record.
void	writeByte(byte b, String tag) Write a byte to serialized record.
void	writeDouble(double d, String tag) Write a double precision floating point number to serialized record.
void	writeFloat(float f, String tag) Write a single-precision float to serialized record.
void	writeInt(int i, String tag) Write an integer to serialized record.
void	writeLong(long l, String tag) Write a long integer to serialized record.
void	writeString(String s, String tag) Write a unicode string to serialized record.

方法详细资料

writeByte

void writeByte(byte b,
             String tag)
               throws IOException

Write a byte to serialized record.

参数:

b - Byte to be serialized

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

抛出:

IOException - Indicates error in serialization

writeBool

void writeBool(boolean b,
             String tag)
               throws IOException

Write a boolean to serialized record.

参数:

b - Boolean to be serialized

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

抛出:

IOException - Indicates error in serialization

writeInt

void writeInt(int i,
            String tag)
              throws IOException

Write an integer to serialized record.

参数:

i - Integer to be serialized

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

抛出:

IOException - Indicates error in serialization

writeLong

void writeLong(long l,
             String tag)
               throws IOException

Write a long integer to serialized record.

参数:

l - Long to be serialized

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

抛出:

IOException - Indicates error in serialization

writeFloat

void writeFloat(float f,
              String tag)
                throws IOException

Write a single-precision float to serialized record.

参数:

f - Float to be serialized

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

抛出:

IOException - Indicates error in serialization

writeDouble

void writeDouble(double d,
               String tag)
                 throws IOException

Write a double precision floating point number to serialized record.

参数:

d - Double to be serialized

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

抛出:

IOException - Indicates error in serialization

writeString

void writeString(String s,
               String tag)
                 throws IOException

Write a unicode string to serialized record.

参数:

s - String to be serialized

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

抛出:

IOException - Indicates error in serialization

writeBuffer

void writeBuffer(Buffer buf,
               String tag)
                 throws IOException

Write a buffer to serialized record.

参数:

buf - Buffer to be serialized

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

抛出:

IOException - Indicates error in serialization

startRecord

void startRecord(Record r,
               String tag)
                 throws IOException

Mark the start of a record to be serialized.

参数:

r - Record to be serialized

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

抛出:

IOException - Indicates error in serialization

endRecord

void endRecord(Record r,
             String tag)
               throws IOException

Mark the end of a serialized record.

参数:

r - Record to be serialized

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

抛出:

IOException - Indicates error in serialization

startVector

void startVector(ArrayList v,
               String tag)
                 throws IOException

Mark the start of a vector to be serialized.

参数:

v - Vector to be serialized

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

抛出:

IOException - Indicates error in serialization

endVector

void endVector(ArrayList v,
             String tag)
               throws IOException

Mark the end of a serialized vector.

参数:

v - Vector to be serialized

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

抛出:

IOException - Indicates error in serialization

startMap

void startMap(TreeMap m,
            String tag)
              throws IOException

Mark the start of a map to be serialized.

参数:

m - Map to be serialized

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

抛出:

IOException - Indicates error in serialization

endMap

void endMap(TreeMap m,
          String tag)
            throws IOException

Mark the end of a serialized map.

参数:

m - Map to be serialized

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

抛出:

IOException - Indicates error in serialization