public abstract class BaseInputFormat extends Object implements InputFormat
Constructor and Description |
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BaseInputFormat() |
Modifier and Type | Method and Description |
---|---|
RecordReader |
createReader(InputSplit split)
Creates a reader from an input split
|
WritableType |
getType()
Get the type of the writable.
|
void |
readFields(DataInput in)
Deserialize the fields of this object from
in . |
double |
toDouble()
Convert Writable to double.
|
float |
toFloat()
Convert Writable to float.
|
int |
toInt()
Convert Writable to int.
|
long |
toLong()
Convert Writable to long.
|
void |
write(DataOutput out)
Serialize the fields of this object to
out . |
void |
writeType(DataOutput out)
Write the type (a single short value) to the DataOutput.
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
createReader
public RecordReader createReader(InputSplit split) throws IOException, InterruptedException
InputFormat
createReader
in interface InputFormat
split
- the split to readIOException
InterruptedException
public void write(DataOutput out) throws IOException
Writable
out
.write
in interface Writable
out
- DataOuput
to serialize this object into.IOException
public void readFields(DataInput in) throws IOException
Writable
in
.
For efficiency, implementations should attempt to re-use storage in the existing object where possible.
readFields
in interface Writable
in
- DataInput
to deseriablize this object from.IOException
public double toDouble()
Writable
public float toFloat()
Writable
public int toInt()
Writable
public long toLong()
Writable
public void writeType(DataOutput out) throws IOException
Writable
WritableFactory
for details.writeType
in interface Writable
out
- DataOutput to write toIOException
- For errors during writingpublic WritableType getType()
Writable
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