Package org.apache.cassandra.cql3

Class Tuples

java.lang.Object

org.apache.cassandra.cql3.Tuples

public class Tuples
extends Object

Static helper methods and classes for tuples.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Tuples.DelayedValue	Similar to Value, but contains at least one NonTerminal, such as a non-pure functions or bind marker.
static class	Tuples.InMarker	Represents a marker for a set of IN values that are tuples, like "SELECT ...
static class	Tuples.INRaw	A raw marker for an IN list of tuples, like "SELECT ...
static class	Tuples.InValue	A terminal value for a list of IN values that are tuples.
static class	Tuples.Literal	A raw, literal tuple.
static class	Tuples.Marker	Represents a marker for a single tuple, like "SELECT ... WHERE (a, b, c) > ?"
static class	Tuples.Raw	A raw placeholder for a tuple of values for different multiple columns, each of which may have a different type.
static class	Tuples.Value	A tuple of terminal values (e.g (123, 'abc')).

Method Summary

Modifier and Type	Method	Description
static boolean	checkIfTupleType(AbstractType<?> tuple)
static ColumnSpecification	componentSpecOf(ColumnSpecification column, int component)
static <T> TupleType	getExactTupleTypeIfKnown(List<T> items, Function<T,AbstractType<?>> mapper)	Returns the exact TupleType from the items if it can be known.
static TupleType	getTupleType(AbstractType<?> tuple)
static AssignmentTestable.TestResult	testTupleAssignment(ColumnSpecification receiver, List<? extends AssignmentTestable> elements)	Tests that the tuple with the specified elements can be assigned to the specified column.
static <T> String	tupleToString(Iterable<T> items, Function<T,String> mapper)	Create a String representation of the tuple from the specified items associated to the tuples elements.
static String	tupleToString(List<?> elements)	Create a String representation of the tuple containing the specified elements.
static void	validateTupleAssignableTo(ColumnSpecification receiver, List<? extends AssignmentTestable> elements)	Checks if the tuple with the specified elements can be assigned to the specified column.

Methods inherited from class java.lang.Object

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

Method Details

componentSpecOf

public static ColumnSpecification componentSpecOf(ColumnSpecification column,
 int component)

tupleToString

public static String tupleToString(List<?> elements)

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

Parameters:

elements - the tuple elements

Returns:

a String representation of the tuple

tupleToString

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

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

Parameters:

items - items associated to the tuple elements

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

Returns:

a String representation of the tuple

getExactTupleTypeIfKnown

public static <T> TupleType getExactTupleTypeIfKnown(List<T> items,
 Function<T,AbstractType<?>> mapper)

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

Parameters:

items - the items mapped to the tuple elements

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

Returns:

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

validateTupleAssignableTo

public static void validateTupleAssignableTo(ColumnSpecification receiver,
 List<? extends AssignmentTestable> elements)

Checks if the tuple with the specified elements can be assigned to the specified column.

Parameters:

receiver - the receiving column

elements - the tuple elements

Throws:

InvalidRequestException - if the tuple cannot be assigned to the specified column.

testTupleAssignment

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

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

Parameters:

receiver - the receiving column

elements - the tuple elements

checkIfTupleType

public static boolean checkIfTupleType(AbstractType<?> tuple)

getTupleType

public static TupleType getTupleType(AbstractType<?> tuple)