Package org.apache.ignite.internal.cache.query.index.sorted

Class IndexRowComparatorImpl

java.lang.Object

org.apache.ignite.internal.cache.query.index.sorted.IndexRowComparatorImpl

All Implemented Interfaces:

IndexRowComparator

public class IndexRowComparatorImpl
extends Object
implements IndexRowComparator

Provide default logic of rows comparison. Consider: 1. NULL is the least value. 2. Comparison of different types is not supported.

Field Summary

Fields

Modifier and Type	Field	Description
protected IndexKeyTypeSettings	keyTypeSettings	Key type settings for this index.

Constructor Summary

Constructors

Constructor	Description
IndexRowComparatorImpl(IndexKeyTypeSettings settings)

Method Summary

Modifier and Type	Method	Description
int	compareKey(long pageAddr, int off, int maxSize, IndexKey key, InlineIndexKeyType type)	Compare inlined index key with specified key.
int	compareKey(IndexKey left, IndexKey right)	Compare index keys.
int	compareRow(IndexRow left, IndexRow right, int idx)	Compare index rows by key specified with idx.

Methods inherited from class java.lang.Object

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

Field Detail

keyTypeSettings

protected final IndexKeyTypeSettings keyTypeSettings

Key type settings for this index.

Constructor Detail

IndexRowComparatorImpl

public IndexRowComparatorImpl(IndexKeyTypeSettings settings)

Method Detail

compareKey

public int compareKey(long pageAddr,
                      int off,
                      int maxSize,
                      IndexKey key,
                      InlineIndexKeyType type)

Compare inlined index key with specified key. If it is impossible to compare inlined key, it returns special vals: COMPARE_UNSUPPORTED and CANT_BE_COMPARE, see NullableInlineIndexKeyType.

Specified by:

compareKey in interface IndexRowComparator

Parameters:

pageAddr - address of an index row.

off - offset of an index key.

maxSize - max size to read.

key - key to compare with.

type - inline type of index key.

compareRow

public int compareRow(IndexRow left,
                      IndexRow right,
                      int idx)
               throws IgniteCheckedException

Compare index rows by key specified with idx.

Specified by:

compareRow in interface IndexRowComparator

Parameters:

left - index row.

right - index row.

idx - offset of index key.

Throws:

IgniteCheckedException

compareKey

public int compareKey(IndexKey left,
                      IndexKey right)
               throws IgniteCheckedException

Compare index keys.

Specified by:

compareKey in interface IndexRowComparator

Parameters:

left - index key.

right - index key.

Throws:

IgniteCheckedException