Package org.apache.calcite.runtime

Class Enumerables

java.lang.Object

org.apache.calcite.runtime.Enumerables

public class Enumerables
extends Object

Utilities for processing Enumerable collections.

This class is a place to put things not yet added to linq4j. Methods are subject to removal without notice.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	Enumerables.Emitter<E,TResult>	Given a match (a list of rows, and their states) produces a list of rows to be output.

Method Summary

Modifier and Type	Method	Description
static <E, TKey, TResult> Enumerable<TResult>	match(Enumerable<E> enumerable, Function1<E,TKey> keySelector, Matcher<E> matcher, Enumerables.Emitter<E,TResult> emitter, int history, int future)
static <E> Enumerable<E>	slice0(Enumerable<E[]> enumerable)	Converts an enumerable over singleton arrays into the enumerable of their first elements.
static com.google.common.base.Supplier<Enumerable<Row>>	toRow(com.google.common.base.Supplier<Enumerable<@Nullable Object[]>> supplier)	Deprecated.
static Supplier<Enumerable<Row>>	toRow(Supplier<Enumerable<@Nullable Object[]>> supplier)	Converts a supplier of an Enumerable over object arrays into a supplier of an Enumerable over Row objects.
static Enumerable<Row>	toRow(Enumerable<@Nullable Object[]> enumerable)	Converts an Enumerable over object arrays into an Enumerable over Row objects.

Methods inherited from class java.lang.Object

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

Method Details

slice0

public static <E> Enumerable<E> slice0(Enumerable<E[]> enumerable)

Converts an enumerable over singleton arrays into the enumerable of their first elements.

toRow

public static Enumerable<Row> toRow(Enumerable<@Nullable Object[]> enumerable)

Converts an Enumerable over object arrays into an Enumerable over Row objects.

toRow

public static Supplier<Enumerable<Row>> toRow(Supplier<Enumerable<@Nullable Object[]>> supplier)

Converts a supplier of an Enumerable over object arrays into a supplier of an Enumerable over Row objects.

toRow

@Deprecated
public static com.google.common.base.Supplier<Enumerable<Row>> toRow(com.google.common.base.Supplier<Enumerable<@Nullable Object[]>> supplier)

Deprecated.

match

public static <E,
TKey,
TResult> Enumerable<TResult> match(Enumerable<E> enumerable,
 Function1<E,TKey> keySelector,
 Matcher<E> matcher,
 Enumerables.Emitter<E,TResult> emitter,
 int history,
 int future)