com.asakusafw.runtime.io.util

Interface WritableRawComparable

All Superinterfaces:

Comparable<WritableRawComparable>, org.apache.hadoop.io.Writable, org.apache.hadoop.io.WritableComparable<WritableRawComparable>

All Known Implementing Classes:

AbstractDirectOutputKey, BooleanOption, ByteOption, DateOption, DateTimeOption, DecimalOption, DirectOutputOrder, DoubleOption, FloatOption, IntOption, InvertOrder, LongOption, NullWritableRawComparable, ShortOption, ShuffleKey, StringOption, StringTemplate, ValueOption, WritableRawComparableTuple, WritableRawComparableUnion

public interface WritableRawComparable
extends org.apache.hadoop.io.WritableComparable<WritableRawComparable>

WritableComparable which is comparable in is bytes. Clients must override Object.hashCode() and Object.equals(Object).

Since:

0.2.5

Method Summary

Modifier and Type	Method and Description
int	compareInBytes(byte[] b1, int o1, byte[] b2, int o2) Compares two objects in bytes.
int	getSizeInBytes(byte[] buf, int offset) Computes and returns size in bytes.

Methods inherited from interface org.apache.hadoop.io.Writable

readFields, write

Methods inherited from interface java.lang.Comparable

compareTo

Method Detail

getSizeInBytes

int getSizeInBytes(byte[] buf,
                   int offset)
            throws IOException

Computes and returns size in bytes.

Parameters:

buf - bytes array

offset - bytes offset

Returns:

size in bytes

Throws:

IOException - if failed to compute size

compareInBytes

int compareInBytes(byte[] b1,
                   int o1,
                   byte[] b2,
                   int o2)
            throws IOException

Compares two objects in bytes.

Parameters:

b1 - bytes representation of the first object

o1 - offset of the first object

b2 - bytes representation of the second object

o2 - offset of the second object

Returns:

the comparison result

Throws:

IOException - if failed to comparison