org.apache.druid.query.aggregation.first

Class StringFirstLastUtils

java.lang.Object

org.apache.druid.query.aggregation.first.StringFirstLastUtils

public class StringFirstLastUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
StringFirstLastUtils()

Method Summary

Modifier and Type	Method and Description
static boolean	objectNeedsFoldCheck(Object obj) Returns whether an object *might* contain SerializablePairLongString objects.
static SerializablePairLongString	readPair(ByteBuffer buf, int position)
static SerializablePairLongString	readPairFromSelectors(BaseLongColumnValueSelector timeSelector, BaseObjectColumnValueSelector<?> valueSelector)
static SerializablePairLongString	readPairFromVectorSelectorsAtIndex(BaseLongVectorValueSelector timeSelector, VectorObjectSelector valueSelector, int index) Return the object at a particular index from the vector selectors.
static boolean	selectorNeedsFoldCheck(BaseObjectColumnValueSelector<?> valueSelector, ColumnCapabilities valueSelectorCapabilities) Returns whether a given value selector *might* contain SerializablePairLongString objects.
static void	writePair(ByteBuffer buf, int position, SerializablePairLongString pair, int maxStringBytes)

Methods inherited from class java.lang.Object

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

Constructor Detail

StringFirstLastUtils

public StringFirstLastUtils()

Method Detail

selectorNeedsFoldCheck

public static boolean selectorNeedsFoldCheck(BaseObjectColumnValueSelector<?> valueSelector,
                                             @Nullable
                                             ColumnCapabilities valueSelectorCapabilities)

Returns whether a given value selector *might* contain SerializablePairLongString objects.

objectNeedsFoldCheck

public static boolean objectNeedsFoldCheck(Object obj)

Returns whether an object *might* contain SerializablePairLongString objects.

readPairFromVectorSelectorsAtIndex

public static SerializablePairLongString readPairFromVectorSelectorsAtIndex(BaseLongVectorValueSelector timeSelector,
                                                                            VectorObjectSelector valueSelector,
                                                                            int index)

Return the object at a particular index from the vector selectors. index of bounds issues is the responsibility of the caller

readPairFromSelectors

@Nullable
public static SerializablePairLongString readPairFromSelectors(BaseLongColumnValueSelector timeSelector,
                                                                         BaseObjectColumnValueSelector<?> valueSelector)

writePair

public static void writePair(ByteBuffer buf,
                             int position,
                             SerializablePairLongString pair,
                             int maxStringBytes)

readPair

public static SerializablePairLongString readPair(ByteBuffer buf,
                                                  int position)