org.apache.flink.api.java.typeutils.runtime

Class WritableComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

java.lang.Object

org.apache.flink.api.common.typeutils.TypeComparator<T>

org.apache.flink.api.java.typeutils.runtime.WritableComparator<T>

All Implemented Interfaces:

Serializable

public class WritableComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>
extends TypeComparator<T>

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
WritableComparator(boolean ascending, Class<T> type)

Method Summary

Methods

Modifier and Type	Method and Description
int	compare(T first, T second)
int	compareSerialized(DataInputView firstSource, DataInputView secondSource)
int	compareToReference(TypeComparator<T> referencedComparator)
TypeComparator<T>	duplicate()
boolean	equalToReference(T candidate)
int	extractKeys(Object record, Object[] target, int index)
TypeComparator[]	getFlatComparators()
int	getNormalizeKeyLen()
int	hash(T record)
boolean	invertNormalizedKey()
boolean	isNormalizedKeyPrefixOnly(int keyBytes)
void	putNormalizedKey(T record, MemorySegment target, int offset, int numBytes)
T	readWithKeyDenormalization(T reuse, DataInputView source)
void	setReference(T toCompare)
boolean	supportsNormalizedKey()
boolean	supportsSerializationWithKeyNormalization()
void	writeWithKeyNormalization(T record, DataOutputView target)

Methods inherited from class org.apache.flink.api.common.typeutils.TypeComparator

compareAgainstReference, supportsCompareAgainstReference

Methods inherited from class java.lang.Object

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

Constructor Detail

WritableComparator

public WritableComparator(boolean ascending,
                  Class<T> type)

Method Detail

hash

public int hash(T record)

Specified by:

hash in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

setReference

public void setReference(T toCompare)

Specified by:

setReference in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

equalToReference

public boolean equalToReference(T candidate)

Specified by:

equalToReference in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

compareToReference

public int compareToReference(TypeComparator<T> referencedComparator)

Specified by:

compareToReference in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

compare

public int compare(T first,
          T second)

Specified by:

compare in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

compareSerialized

public int compareSerialized(DataInputView firstSource,
                    DataInputView secondSource)
                      throws IOException

Specified by:

compareSerialized in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

Throws:

IOException

supportsNormalizedKey

public boolean supportsNormalizedKey()

Specified by:

supportsNormalizedKey in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

getNormalizeKeyLen

public int getNormalizeKeyLen()

Specified by:

getNormalizeKeyLen in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

isNormalizedKeyPrefixOnly

public boolean isNormalizedKeyPrefixOnly(int keyBytes)

Specified by:

isNormalizedKeyPrefixOnly in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

putNormalizedKey

public void putNormalizedKey(T record,
                    MemorySegment target,
                    int offset,
                    int numBytes)

Specified by:

putNormalizedKey in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

invertNormalizedKey

public boolean invertNormalizedKey()

Specified by:

invertNormalizedKey in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

duplicate

public TypeComparator<T> duplicate()

Specified by:

duplicate in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

extractKeys

public int extractKeys(Object record,
              Object[] target,
              int index)

Specified by:

extractKeys in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

getFlatComparators

public TypeComparator[] getFlatComparators()

Specified by:

getFlatComparators in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

supportsSerializationWithKeyNormalization

public boolean supportsSerializationWithKeyNormalization()

Specified by:

supportsSerializationWithKeyNormalization in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

writeWithKeyNormalization

public void writeWithKeyNormalization(T record,
                             DataOutputView target)
                               throws IOException

Specified by:

writeWithKeyNormalization in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

Throws:

IOException

readWithKeyDenormalization

public T readWithKeyDenormalization(T reuse,
                           DataInputView source)
                                                                                  throws IOException

Specified by:

readWithKeyDenormalization in class TypeComparator<T extends org.apache.hadoop.io.Writable & Comparable<T>>

Throws:

IOException