Package org.apache.cassandra.cql3

Class Sets

java.lang.Object

org.apache.cassandra.cql3.Sets

public abstract class Sets
extends Object

Static helper methods and classes for sets.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Sets.Adder
static class	Sets.DelayedValue
static class	Sets.Discarder
static class	Sets.ElementDiscarder
static class	Sets.Literal
static class	Sets.Marker
static class	Sets.Setter
static class	Sets.Value

Method Summary

Modifier and Type	Method	Description
static <T> SetType<?>	getExactSetTypeIfKnown(List<T> items, Function<T,AbstractType<?>> mapper)	Returns the exact SetType from the items if it can be known.
static <T> SetType<?>	getPreferredCompatibleType(List<T> items, Function<T,AbstractType<?>> mapper)
static <T> String	setToString(Iterable<T> items, Function<T,String> mapper)	Create a String representation of the set from the specified items associated to the set elements.
static String	setToString(List<?> elements)	Create a String representation of the set containing the specified elements.
static AssignmentTestable.TestResult	testSetAssignment(ColumnSpecification receiver, List<? extends AssignmentTestable> elements)	Tests that the set with the specified elements can be assigned to the specified column.
static ColumnSpecification	valueSpecOf(ColumnSpecification column)

Methods inherited from class java.lang.Object

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

Method Details

valueSpecOf

public static ColumnSpecification valueSpecOf(ColumnSpecification column)

testSetAssignment

public static AssignmentTestable.TestResult testSetAssignment(ColumnSpecification receiver,
 List<? extends AssignmentTestable> elements)

Tests that the set with the specified elements can be assigned to the specified column.

Parameters:

receiver - the receiving column

elements - the set elements

setToString

public static String setToString(List<?> elements)

Create a String representation of the set containing the specified elements.

Parameters:

elements - the set elements

Returns:

a String representation of the set

setToString

public static <T> String setToString(Iterable<T> items,
 Function<T,String> mapper)

Create a String representation of the set from the specified items associated to the set elements.

Parameters:

items - items associated to the set elements

mapper - the mapper used to map the items to the String representation of the set elements

Returns:

a String representation of the set

getExactSetTypeIfKnown

public static <T> SetType<?> getExactSetTypeIfKnown(List<T> items,
 Function<T,AbstractType<?>> mapper)

Returns the exact SetType from the items if it can be known.

Parameters:

items - the items mapped to the set elements

mapper - the mapper used to retrieve the element types from the items

Returns:

the exact SetType from the items if it can be known or null

getPreferredCompatibleType

public static <T> SetType<?> getPreferredCompatibleType(List<T> items,
 Function<T,AbstractType<?>> mapper)