co.streamx.fluent.extree.expression

Class LambdaExpression<F>

java.lang.Object

co.streamx.fluent.extree.expression.Expression

co.streamx.fluent.extree.expression.InvocableExpression

co.streamx.fluent.extree.expression.LambdaExpression<F>

Type Parameters:

F - type of the lambda represented by this LambdaExpression.

public final class LambdaExpression<F>
extends InvocableExpression

Describes a lambda expression. This captures a block of code that is similar to a method body.

Use parse(Object) method to get a lambda expression tree.

Method Summary

Modifier and Type	Method and Description
Function<Object[],?>	compile() Produces a Function that represents the lambda expression.
static Function<Object[],?>	compile(Expression e) Produces a Function that represents the expression.
boolean	isMethodRef() Gets a value indicating whether the lambda expression tree node represents a lambda expression calling a method.
static <T> LambdaExpression<T>	parse(T lambda) Creates LambdaExpression representing the lambda expression tree.
static LambdaExpression<?>	parseMethod(Method method, Object instance) Creates LambdaExpression representing the passed method expression tree.
static <T> LambdaExpression<T>	parseMethod(T methodReference) Creates LambdaExpression representing the passed method expression tree.
LambdaExpression<F>	parseMethodRef() If the LambdaExpression wraps a method call, then returns the method representation as an AST. Otherwise, returns the current lambda expression. The result is always semantically equivalent to the current lambda expression.
String	toString()
protected <T> T	visit(ExpressionVisitor<T> v) Dispatches to the specific visit method for this node type.

Methods inherited from class co.streamx.fluent.extree.expression.Expression

accept, add, arrayIndex, arrayLength, binary, binary, bitwiseAnd, bitwiseNot, bitwiseOr, block, coalesce, condition, constant, constant, convert, delegate, divide, equal, equals, exclusiveOr, get, get, get, greaterThan, greaterThanOrEqual, instanceOf, instanceOf, invoke, invoke, invoke, invoke, invoke, invoke, isNonNull, isNull, lambda, leftShift, lessThan, lessThanOrEqual, logicalAnd, logicalNot, logicalOr, member, modulo, multiply, negate, newArrayInit, newInstance, newInstance, newInstance, notEqual, parameter, rightShift, subtract, unary

Methods inherited from class java.lang.Object

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

Method Detail

isMethodRef

public boolean isMethodRef()

Gets a value indicating whether the lambda expression tree node represents a lambda expression calling a method.

parseMethodRef

public LambdaExpression<F> parseMethodRef()

If the LambdaExpression wraps a method call, then returns the method representation as an AST.
Otherwise, returns the current lambda expression.
The result is always semantically equivalent to the current lambda expression.

parse

public static <T> LambdaExpression<T> parse(T lambda)

Creates LambdaExpression representing the lambda expression tree.

Type Parameters:

T - the type of lambda to parse

Parameters:

lambda - - the lambda

Returns:

LambdaExpression representing the lambda expression tree.

parseMethod

public static <T> LambdaExpression<T> parseMethod(T methodReference)

Creates LambdaExpression representing the passed method expression tree.

Type Parameters:

T - the type of lambda to parse

Parameters:

methodReference - - reference to a method, e.g. MyClass::doWork

Returns:

LambdaExpression representing the lambda expression tree.

parseMethod

public static LambdaExpression<?> parseMethod(Method method,
                                              Object instance)

Creates LambdaExpression representing the passed method expression tree.

Parameters:

method - to parse

instance - Required if the method is not static, otherwise null.

Returns:

LambdaExpression representing the lambda expression tree.

compile

public static Function<Object[],?> compile(Expression e)

Produces a Function that represents the expression.

Parameters:

e - Expression to compile

Returns:

Function that represents the expression.

compile

public Function<Object[],?> compile()

Produces a Function that represents the lambda expression.

Returns:

Function that represents the lambda expression.

visit

protected <T> T visit(ExpressionVisitor<T> v)

Description copied from class: Expression

Dispatches to the specific visit method for this node type. For example, BinaryExpression calls the ExpressionVisitor.visit(BinaryExpression).

Specified by:

visit in class Expression

Type Parameters:

T - type the visitor methods return after processing.

Parameters:

v - The visitor to visit this node with.

Returns:

T

toString

public String toString()

Overrides:

toString in class Object