io.debezium.relational

Class Selectors

java.lang.Object

io.debezium.relational.Selectors

@Immutable
public class Selectors
extends Object

Define predicates determines whether tables or columns should be used. The predicates use rules to determine which tables and columns are included or excluded.

Because tables can be included and excluded based upon their fully-qualified names and based upon the database names, this class defines a builder to collect the various regular expression patterns the predicate(s) will use to determine which columns and tables are included. The builder is then used to build the immutable table selection predicate.

By default all columns in included tables will be selected, except when they are specifically excluded using regular expressions that match the columns' fully-qualified names. Therefore, the predicate is constructed using a simple static method.

Author:

Randall Hauch

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Selectors.DatabaseSelectionPredicateBuilder A builder of a database predicate.
static interface	Selectors.TableIdToStringMapper Implementations convert given TableIds to strings, so regular expressions can be applied to them for the purpose of table filtering.
static class	Selectors.TableSelectionPredicateBuilder A builder of a table predicate.

Constructor Summary

Constructors

Constructor and Description
Selectors()

Method Summary

Modifier and Type	Method and Description
static Selectors.DatabaseSelectionPredicateBuilder	databaseSelector() Obtain a new builder for a table selection predicate.
static Predicate<ColumnId>	excludeColumns(String fullyQualifiedColumnNames) Build the Predicate that determines whether a column identified by a given ColumnId is to be included, using the given comma-separated regular expression patterns defining which columns (if any) should be excluded.
private static boolean	isEmpty(String value)
static Selectors.TableSelectionPredicateBuilder	tableSelector() Obtain a new builder for a table selection predicate.

Methods inherited from class java.lang.Object

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

Constructor Detail

Selectors

public Selectors()

Method Detail

databaseSelector

public static Selectors.DatabaseSelectionPredicateBuilder databaseSelector()

Obtain a new builder for a table selection predicate.

Returns:

the builder; never null

isEmpty

private static boolean isEmpty(String value)

tableSelector

public static Selectors.TableSelectionPredicateBuilder tableSelector()

Obtain a new builder for a table selection predicate.

Returns:

the builder; never null

excludeColumns

public static Predicate<ColumnId> excludeColumns(String fullyQualifiedColumnNames)

Build the Predicate that determines whether a column identified by a given ColumnId is to be included, using the given comma-separated regular expression patterns defining which columns (if any) should be excluded.

Note that this predicate is completely independent of the table selection predicate, so it is expected that this predicate be used only after the table selection predicate determined the table containing the column(s) is to be used.

Parameters:

fullyQualifiedColumnNames - the comma-separated list of fully-qualified column names to exclude; may be null or

Returns:

this builder so that methods can be chained together; never null