Package org.eclipse.jdt.core.dom

Class LambdaExpression

java.lang.Object
org.eclipse.jdt.core.dom.ASTNode
org.eclipse.jdt.core.dom.Expression
org.eclipse.jdt.core.dom.LambdaExpression
public class LambdaExpression extends Expression
Lambda expression AST node type (added in JLS8 API). 
 LambdaExpression:
    Identifier -> Body
    ( [ Identifier { , Identifier } ] ) -> Body
    ( [ FormalParameter { , FormalParameter } ] ) -> Body

The first two forms use VariableDeclarationFragment for the parameter or parameters, while the third form uses SingleVariableDeclaration.

The Body can be either a Block or an Expression.

Since:
3.10
Restriction:
This class is not intended to be instantiated by clients

  • Field Details

  • Method Details

    • propertyDescriptors

      public static List propertyDescriptors(int apiLevel)
      Returns a list of structural property descriptors for this node type. Clients must not modify the result.
      Parameters:
      apiLevel - the API level; one of the AST.JLS* constants
      Returns:
      a list of property descriptors (element type: StructuralPropertyDescriptor)

    • hasParentheses

      public boolean hasParentheses()
      Returns whether parentheses around the parameters are present or not.

      Note that parentheses are required unless parameters() contains just a single VariableDeclarationFragment. ASTRewrite may ignore this property if necessary.

      Returns:
      true if this lambda expression has parentheses around its parameters and false otherwise

    • setParentheses

      public void setParentheses(boolean hasParentheses)
      Sets whether this lambda expression has parentheses around its parameters or not.

      Note that parentheses are required unless parameters() contains just a single VariableDeclarationFragment. ASTRewrite may ignore this property if necessary.

      Parameters:
      hasParentheses - true if this lambda expression has parentheses around its parameters and false otherwise

    • parameters

      public List parameters()
      Returns the live ordered list of formal parameters of this lambda expression. Note that all elements must be of the same type, either
      Returns:
      the live list of formal parameters of this lambda expression (element type: VariableDeclaration)

    • getBody

      public ASTNode getBody()
      Returns the body of this lambda expression.
      Returns:
      the lambda expression body, which can be either a Block or an Expression

    • setBody

      public void setBody(ASTNode body)
      Sets the body of this lambda expression.
      Parameters:
      body - a block node or an expression node
      Throws:
      IllegalArgumentException - if:
      • the node belongs to a different AST
      • the node already has a parent
      • a cycle in would be created
      • body is neither a Block nor an Expression

    • resolveMethodBinding

      public IMethodBinding resolveMethodBinding()
      Resolves and returns the binding for the lambda expression

      Note that bindings are generally unavailable unless requested when the AST is being built.

      Returns:
      the binding, or null if the binding cannot be resolved