Module swim.structure

Package swim.structure

Class Expression

java.lang.Object

swim.structure.Item

swim.structure.Value

swim.structure.Expression

All Implemented Interfaces:

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

Direct Known Subclasses:

Func, Operator, Selector

public abstract class Expression
extends Value

A combination of operators, constants, and variables. Every Item in the data model can be evaluated against a scope. An Expression is some Value that, when evaluated, may yield a different value than the Expression itself. Note that this is a stricter definition than that of a logical expression; for example, the number 2 is a valid expression, but it is not an Expression.

An Expression can be either a Selector or an Operator. A Selector references specific attributes of a model instance. An Operator identifies an operation on constants, variables, or Selector expressions. Together, these form a foundation for building expression languages that can both manipulate and read structured objects.

Constructor Summary

Constructors

Constructor	Description
Expression()

Method Summary

Modifier and Type	Method	Description
Operator	and(Item that)
Operator	and(Value that)
Operator	bitwiseAnd(Item that)
Operator	bitwiseAnd(Value that)
Operator	bitwiseNot()
Operator	bitwiseOr(Item that)
Operator	bitwiseOr(Value that)
Operator	bitwiseXor(Item that)
Operator	bitwiseXor(Value that)
Item	conditional(Item thenTerm, Item elseTerm)
Value	conditional(Value thenTerm, Value elseTerm)
Operator	divide(Item that)
Operator	divide(Value that)
Operator	eq(Item that)
Operator	eq(Value that)
Operator	ge(Item that)
Operator	ge(Value that)
Operator	gt(Item that)
Operator	gt(Value that)
Operator	inverse()
Operator	le(Item that)
Operator	le(Value that)
Operator	lt(Item that)
Operator	lt(Value that)
Operator	minus(Item that)
Operator	minus(Value that)
Operator	modulo(Item that)
Operator	modulo(Value that)
Operator	ne(Item that)
Operator	ne(Value that)
Operator	negative()
Operator	not()
Operator	or(Item that)
Operator	or(Value that)
Operator	plus(Item that)
Operator	plus(Value that)
Operator	positive()
Operator	times(Item that)
Operator	times(Value that)

Methods inherited from class swim.structure.Value

absent, alias, body, booleanValue, booleanValue, branch, builder, byteValue, byteValue, charValue, charValue, commit, contains, containsKey, containsKey, containsValue, doubleValue, doubleValue, empty, extant, flattened, floatValue, floatValue, fromObject, get, get, getAttr, getAttr, getField, getField, getItem, getSlot, getSlot, head, header, headers, integerValue, integerValue, intValue, intValue, isAliased, isDefined, isDefinite, isDistinct, isMutable, key, keyEquals, lambda, length, longValue, longValue, numberValue, numberValue, removed, removed, shortValue, shortValue, stringValue, stringValue, tag, tail, target, toValue, unflattened

Methods inherited from class swim.structure.Item

appended, appended, appended, appended, appended, appended, appended, appended, cast, cast, coerce, coerce, compareTo, concat, debug, display, equals, evaluate, evaluate, filter, filter, globalScope, hashCode, invoke, isConstant, iterator, max, min, precedence, prepended, prepended, prepended, prepended, prepended, prepended, prepended, prepended, substitute, substitute, toString, typeOrder, updated, 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, updatedAttr, updatedSlot, 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

Constructor Detail

Expression

public Expression()

Method Detail

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 Operator or(Item that)

Overrides:

or in class Value

or

public Operator or(Value that)

Overrides:

or in class Value

and

public Operator and(Item that)

Overrides:

and in class Value

and

public Operator and(Value that)

Overrides:

and in class Value

bitwiseOr

public Operator bitwiseOr(Item that)

Overrides:

bitwiseOr in class Value

bitwiseOr

public Operator bitwiseOr(Value that)

Overrides:

bitwiseOr in class Value

bitwiseXor

public Operator bitwiseXor(Item that)

Overrides:

bitwiseXor in class Value

bitwiseXor

public Operator bitwiseXor(Value that)

Overrides:

bitwiseXor in class Value

bitwiseAnd

public Operator bitwiseAnd(Item that)

Overrides:

bitwiseAnd in class Value

bitwiseAnd

public Operator bitwiseAnd(Value that)

Overrides:

bitwiseAnd in class Value

lt

public Operator lt(Item that)

Overrides:

lt in class Value

lt

public Operator lt(Value that)

Overrides:

lt in class Value

le

public Operator le(Item that)

Overrides:

le in class Value

le

public Operator le(Value that)

Overrides:

le in class Value

eq

public Operator eq(Item that)

Overrides:

eq in class Value

eq

public Operator eq(Value that)

Overrides:

eq in class Value

ne

public Operator ne(Item that)

Overrides:

ne in class Value

ne

public Operator ne(Value that)

Overrides:

ne in class Value

ge

public Operator ge(Item that)

Overrides:

ge in class Value

ge

public Operator ge(Value that)

Overrides:

ge in class Value

gt

public Operator gt(Item that)

Overrides:

gt in class Value

gt

public Operator gt(Value that)

Overrides:

gt in class Value

plus

public Operator plus(Item that)

Overrides:

plus in class Value

plus

public Operator plus(Value that)

Overrides:

plus in class Value

minus

public Operator minus(Item that)

Overrides:

minus in class Value

minus

public Operator minus(Value that)

Overrides:

minus in class Value

times

public Operator times(Item that)

Overrides:

times in class Value

times

public Operator times(Value that)

Overrides:

times in class Value

divide

public Operator divide(Item that)

Overrides:

divide in class Value

divide

public Operator divide(Value that)

Overrides:

divide in class Value

modulo

public Operator modulo(Item that)

Overrides:

modulo in class Value

modulo

public Operator modulo(Value that)

Overrides:

modulo in class Value

not

public Operator not()

Overrides:

not in class Value

bitwiseNot

public Operator bitwiseNot()

Overrides:

bitwiseNot in class Value

negative

public Operator negative()

Overrides:

negative in class Value

positive

public Operator positive()

Overrides:

positive in class Value

inverse

public Operator inverse()

Overrides:

inverse in class Value