Package com.linkedin.davinci.schema.merge

Class AvroCollectionElementComparator

java.lang.Object

com.linkedin.davinci.schema.merge.AvroCollectionElementComparator

@ThreadSafe
public class AvroCollectionElementComparator
extends java.lang.Object

This comparator is used to compare GenericRecord collection field elements which must have schemas. This comparison is required in order to determine orders of 2 collection elements when their timestamps are the same.

Field Summary

Fields

Modifier and Type	Field	Description
static AvroCollectionElementComparator	INSTANCE

Method Summary

Modifier and Type	Method	Description
int	compare(java.lang.Object o1, java.lang.Object o2, org.apache.avro.Schema schema)	This function compares two objects using the provided schema.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final AvroCollectionElementComparator INSTANCE

Method Detail

compare

public int compare(java.lang.Object o1,
                   java.lang.Object o2,
                   org.apache.avro.Schema schema)

This function compares two objects using the provided schema.

Parameters:

o1 - first object to compare

o2 - second object to compare

schema - Schema of o1 and o2. Used to determine their type for the comparison

Returns:

a negative integer if o1 is less than o2, zero if o1 is equal to o2, or a positive integer if o1 is greater than o2. When o1 and o2 are IndexedHashMaps: returns a negative integer if o1.size() < o2.size(), a positive integer if o1.size() > o2.size, or a result of entry-by-entry comparison which is done using positional indexes.

Throws:

java.lang.IllegalArgumentException - if o1 and o2 have different schemas