Module swim.structure

Package swim.structure

Class Absent

java.lang.Object

swim.structure.Item

swim.structure.Value

swim.structure.Absent

All Implemented Interfaces:

Comparable<Item>, Iterable<Item>, Debug, Display

public final class Absent
extends Value

Method Summary

Modifier and Type	Method	Description
static Absent	absent()
Item	and(Item that)
Value	and(Value that)
Record	appended(Object... items)
Record	appended(Item item)
boolean	booleanValue()	Always returns false because Absent behaves like a falsey value.
boolean	booleanValue(boolean orElse)	Always returns false because Absent behaves like a falsey value.
int	compareTo(Item other)
Record	concat(Item that)
Item	conditional(Item thenTerm, Item elseTerm)
Value	conditional(Value thenTerm, Value elseTerm)
<T> Output<T>	debug(Output<T> output)	Writes a developer readable, debug-formatted string representation of this object to output.
boolean	equals(Object other)
int	hashCode()
boolean	isConstant()	Returns true if this Item always evaluates to the same Item.
boolean	isDefined()	Always returns false because Absent represents an undefined value.
boolean	isDefinite()	Always returns false because Absent is not a definite value.
boolean	isDistinct()	Always returns false because Absent is not a distinct value.
Iterator<Item>	iterator()
Value	not()
Item	or(Item that)
Value	or(Value that)
Record	prepended(Object... items)
Record	prepended(Item item)
int	typeOrder()	Returns the heterogeneous sort order of this Item.
Record	unflattened()	Always returns an empty Record because Absent is not a distinct value.
Record	updated(Value key, Value value)
Record	updatedAttr(Text key, Value value)
Record	updatedSlot(Value key, Value value)

Methods inherited from class swim.structure.Value

alias, bitwiseAnd, bitwiseAnd, bitwiseNot, bitwiseOr, bitwiseOr, bitwiseXor, bitwiseXor, body, branch, builder, byteValue, byteValue, charValue, charValue, commit, contains, containsKey, containsKey, containsValue, divide, divide, doubleValue, doubleValue, empty, eq, eq, extant, flattened, floatValue, floatValue, fromObject, ge, ge, get, get, getAttr, getAttr, getField, getField, getItem, getSlot, getSlot, gt, gt, head, header, headers, integerValue, integerValue, intValue, intValue, inverse, isAliased, isMutable, key, keyEquals, lambda, le, le, length, longValue, longValue, lt, lt, minus, minus, modulo, modulo, ne, ne, negative, numberValue, numberValue, plus, plus, positive, removed, removed, shortValue, shortValue, stringValue, stringValue, tag, tail, target, times, times, toValue

Methods inherited from class swim.structure.Item

appended, appended, appended, appended, appended, appended, cast, cast, coerce, coerce, display, evaluate, evaluate, filter, filter, globalScope, invoke, max, min, precedence, prepended, prepended, prepended, prepended, prepended, prepended, substitute, substitute, toString, updated, updated, updated, updated, updated, updated, updated, updated, updated, updated, updated, updated, updated, updatedAttr, updatedAttr, updatedAttr, updatedAttr, updatedAttr, updatedAttr, updatedAttr, updatedAttr, updatedAttr, updatedAttr, updatedAttr, updatedAttr, updatedAttr, updatedSlot, updatedSlot, updatedSlot, updatedSlot, updatedSlot, updatedSlot, updatedSlot, updatedSlot, updatedSlot, updatedSlot, updatedSlot, updatedSlot, updatedSlot

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Method Details

isDefined

public boolean isDefined()

Always returns false because Absent represents an undefined value.

Overrides:

isDefined in class Value

isDefinite

public boolean isDefinite()

Always returns false because Absent is not a definite value.

Overrides:

isDefinite in class Value

isConstant

public boolean isConstant()

Description copied from class: Item

Returns true if this Item always evaluates to the same Item.

Specified by:

isConstant in class Item

isDistinct

public boolean isDistinct()

Always returns false because Absent is not a distinct value.

Overrides:

isDistinct in class Value

unflattened

public Record unflattened()

Always returns an empty Record because Absent is not a distinct value.

Overrides:

unflattened in class Value

updated

public Record updated(Value key,
 Value value)

Overrides:

updated in class Item

updatedAttr

public Record updatedAttr(Text key,
 Value value)

Overrides:

updatedAttr in class Item

updatedSlot

public Record updatedSlot(Value key,
 Value value)

Overrides:

updatedSlot in class Item

appended

public Record appended(Item item)

Overrides:

appended in class Item

appended

public Record appended(Object... items)

Overrides:

appended in class Item

prepended

public Record prepended(Item item)

Overrides:

prepended in class Item

prepended

public Record prepended(Object... items)

Overrides:

prepended in class Item

concat

public Record concat(Item that)

Overrides:

concat in class Item

conditional

public Item conditional(Item thenTerm,
 Item elseTerm)

Overrides:

conditional in class Value

conditional

public Value conditional(Value thenTerm,
 Value elseTerm)

Overrides:

conditional in class Value

or

public Item or(Item that)

Overrides:

or in class Value

or

public Value or(Value that)

Overrides:

or in class Value

and

public Item and(Item that)

Overrides:

and in class Value

and

public Value and(Value that)

Overrides:

and in class Value

not

public Value not()

Overrides:

not in class Value

booleanValue

public boolean booleanValue()

Always returns false because Absent behaves like a falsey value.

Overrides:

booleanValue in class Value

booleanValue

public boolean booleanValue(boolean orElse)

Always returns false because Absent behaves like a falsey value.

Overrides:

booleanValue in class Value

iterator

public Iterator<Item> iterator()

Specified by:

iterator in interface Iterable<Item>

Overrides:

iterator in class Item

typeOrder

public int typeOrder()

Description copied from class: Item

Returns the heterogeneous sort order of this Item. Used to impose a total order on the set of all items. When comparing two items of different types, the items order according to their typeOrder.

Specified by:

typeOrder in class Item

compareTo

public int compareTo(Item other)

Specified by:

compareTo in interface Comparable<Item>

Specified by:

compareTo in class Item

equals

public boolean equals(Object other)

Specified by:

equals in class Item

hashCode

public int hashCode()

Specified by:

hashCode in class Item

debug

public <T> Output<T> debug(Output<T> output)

Description copied from interface: Debug

Writes a developer readable, debug-formatted string representation of this object to output.

Specified by:

debug in interface Debug

Specified by:

debug in class Item

Returns:

the continuation of the output.

absent

public static Absent absent()