org.apache.calcite.runtime

Class FlatLists

java.lang.Object

org.apache.calcite.runtime.FlatLists

public class FlatLists
extends Object

Space-efficient, comparable, immutable lists.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FlatLists.AbstractFlatList<T> Base class for flat lists.
static interface	FlatLists.ComparableList<T> List that is also comparable.
protected static class	FlatLists.Flat2List<T> List that stores its two elements in the two members of the class.
protected static class	FlatLists.Flat3List<T> List that stores its three elements in the three members of the class.

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.calcite.runtime.FlatLists.ComparableEmptyList	COMPARABLE_EMPTY_LIST

Method Summary

Methods

Modifier and Type	Method and Description
static <T> List<T>	copy(T... t) Creates a memory-, CPU- and cache-efficient immutable list, always copying the contents.
static <T> List<T>	of(List<T> t) Creates a memory-, CPU- and cache-efficient immutable list from an existing list.
static <T> List<T>	of(T... t) Creates a memory-, CPU- and cache-efficient immutable list.
static <T> List<T>	of(T t0, T t1) Creates a flat list with 2 elements.
static <T> List<T>	of(T t0, T t1, T t2) Creates a flat list with 3 elements.

Methods inherited from class java.lang.Object

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

Field Detail

COMPARABLE_EMPTY_LIST

public static final org.apache.calcite.runtime.FlatLists.ComparableEmptyList COMPARABLE_EMPTY_LIST

Method Detail

of

public static <T> List<T> of(T t0,
             T t1)

Creates a flat list with 2 elements.

of

public static <T> List<T> of(T t0,
             T t1,
             T t2)

Creates a flat list with 3 elements.

of

public static <T> List<T> of(T... t)

Creates a memory-, CPU- and cache-efficient immutable list.

Type Parameters:

T - Element type

Parameters:

t - Array of members of list

Returns:

List containing the given members

copy

public static <T> List<T> copy(T... t)

Creates a memory-, CPU- and cache-efficient immutable list, always copying the contents.

Type Parameters:

T - Element type

Parameters:

t - Array of members of list

Returns:

List containing the given members

of

public static <T> List<T> of(List<T> t)

Creates a memory-, CPU- and cache-efficient immutable list from an existing list. The list is always copied.

Type Parameters:

T - Element type

Parameters:

t - Array of members of list

Returns:

List containing the given members