Package org.apache.jackrabbit.oak.plugins.index.property.strategy

Class UniqueEntryStoreStrategy

java.lang.Object

org.apache.jackrabbit.oak.plugins.index.property.strategy.UniqueEntryStoreStrategy

All Implemented Interfaces:

IndexStoreStrategy

public class UniqueEntryStoreStrategy
extends Object
implements IndexStoreStrategy

An IndexStoreStrategy implementation that saves the unique node in a single property.
This should reduce the number of nodes in the repository, and speed up access.

For example for a node that is under /test/node, the index structure will be /oak:index/index/@key:

Constructor Summary

Constructors

Constructor	Description
UniqueEntryStoreStrategy()
UniqueEntryStoreStrategy(String indexName)
UniqueEntryStoreStrategy(String indexName, @NotNull Consumer<NodeBuilder> insertCallback)

Method Summary

Modifier and Type	Method	Description
long	count(Filter filter, NodeState root, NodeState indexMeta, Set<String> values, int max)	Count the occurrence of a given set of values.
long	count(NodeState root, NodeState indexMeta, Set<String> values, int max)	Count the occurrence of a given set of values.
boolean	exists(Supplier<NodeBuilder> index, String key)	Check whether an entry for the given key exists.
String	getIndexNodeName()
Iterable<String>	query(Filter filter, String indexName, NodeState indexMeta, Iterable<String> values)	Search for a given set of values.
Iterable<IndexEntry>	queryEntries(Filter filter, String indexName, NodeState indexMeta, Iterable<String> values)	Search for a given set of values, returning IndexEntry results
void	update(Supplier<NodeBuilder> index, String path, @Nullable String indexName, @Nullable NodeBuilder indexMeta, Set<String> beforeKeys, Set<String> afterKeys)	Updates the index for the given path.

Methods inherited from class java.lang.Object

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

Constructor Detail

UniqueEntryStoreStrategy

public UniqueEntryStoreStrategy()

UniqueEntryStoreStrategy

public UniqueEntryStoreStrategy(String indexName)

UniqueEntryStoreStrategy

public UniqueEntryStoreStrategy(String indexName,
                                @NotNull
                                @NotNull Consumer<NodeBuilder> insertCallback)

Method Detail

update

public void update(Supplier<NodeBuilder> index,
                   String path,
                   @Nullable
                   @Nullable String indexName,
                   @Nullable
                   @Nullable NodeBuilder indexMeta,
                   Set<String> beforeKeys,
                   Set<String> afterKeys)

Description copied from interface: IndexStoreStrategy

Updates the index for the given path.

Specified by:

update in interface IndexStoreStrategy

Parameters:

index - the index node supplier

path - path stored in the index

indexName - the name of the index. May be null.

indexMeta - the definition of the index. May be null.

beforeKeys - keys that no longer apply to the path

afterKeys - keys that now do apply to the path

query

public Iterable<String> query(Filter filter,
                              String indexName,
                              NodeState indexMeta,
                              Iterable<String> values)

Description copied from interface: IndexStoreStrategy

Search for a given set of values.

Specified by:

query in interface IndexStoreStrategy

Parameters:

filter - the filter (can optionally be used for optimized query execution)

indexName - the name of the index (for logging)

indexMeta - the index metadata node (may not be null)

values - values to look for (null to check for property existence)

Returns:

an iterator of paths

queryEntries

public Iterable<IndexEntry> queryEntries(Filter filter,
                                         String indexName,
                                         NodeState indexMeta,
                                         Iterable<String> values)

Search for a given set of values, returning IndexEntry results

Parameters:

filter - the filter (can optionally be used for optimized query execution)

indexName - the name of the index (for logging)

indexMeta - the index metadata node (may not be null)

values - values to look for (null to check for property existence)

Returns:

an iterator of index entries

Throws:

UnsupportedOperationException - if the operation is not supported

exists

public boolean exists(Supplier<NodeBuilder> index,
                      String key)

Description copied from interface: IndexStoreStrategy

Check whether an entry for the given key exists.

Specified by:

exists in interface IndexStoreStrategy

Parameters:

index - the index node supplier

key - the key

Returns:

true if at least one entry exists

count

public long count(NodeState root,
                  NodeState indexMeta,
                  Set<String> values,
                  int max)

Description copied from interface: IndexStoreStrategy

Count the occurrence of a given set of values. Used in calculating the cost of an index.

Specified by:

count in interface IndexStoreStrategy

Parameters:

root - the root node (may not be null)

indexMeta - the index metadata node (may not be null)

values - values to look for (null to check for property existence)

max - the maximum value to return

Returns:

the aggregated count of occurrences for each provided value

count

public long count(Filter filter,
                  NodeState root,
                  NodeState indexMeta,
                  Set<String> values,
                  int max)

Description copied from interface: IndexStoreStrategy

Count the occurrence of a given set of values. Used in calculating the cost of an index.

Specified by:

count in interface IndexStoreStrategy

Parameters:

filter - the filter which can be used to estimate better cost

root - the root node (may not be null)

indexMeta - the index metadata node (may not be null)

values - values to look for (null to check for property existence)

max - the maximum value to return

Returns:

the aggregated count of occurrences for each provided value

getIndexNodeName

public String getIndexNodeName()

Specified by:

getIndexNodeName in interface IndexStoreStrategy