Package org.eclipse.jdt.core.dom

Class IfStatement

java.lang.Object
org.eclipse.jdt.core.dom.ASTNode
org.eclipse.jdt.core.dom.Statement
org.eclipse.jdt.core.dom.IfStatement
public class IfStatement extends Statement
If statement AST node type. 
 IfStatement:
    if ( Expression ) Statement [ else Statement]
Since:
2.0
Restriction:
This class is not intended to be instantiated by clients.

  • Field Details

    • EXPRESSION_PROPERTY

      public static final ChildPropertyDescriptor EXPRESSION_PROPERTY
      The "expression" structural property of this node type (child type: Expression).
      Since:
      3.0

    • THEN_STATEMENT_PROPERTY

      public static final ChildPropertyDescriptor THEN_STATEMENT_PROPERTY
      The "thenStatement" structural property of this node type (child type: Statement).
      Since:
      3.0

    • ELSE_STATEMENT_PROPERTY

      public static final ChildPropertyDescriptor ELSE_STATEMENT_PROPERTY
      The "elseStatement" structural property of this node type (child type: Statement).
      Since:
      3.0

  • 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)
      Since:
      3.0

    • getExpression

      public Expression getExpression()
      Returns the expression of this if statement.
      Returns:
      the expression node

    • setExpression

      public void setExpression(Expression expression)
      Sets the condition of this if statement.
      Parameters:
      expression - the expression node
      Throws:
      IllegalArgumentException - if:
      • the node belongs to a different AST
      • the node already has a parent
      • a cycle in would be created

    • getThenStatement

      public Statement getThenStatement()
      Returns the "then" part of this if statement.
      Returns:
      the "then" statement node

    • setThenStatement

      public void setThenStatement(Statement statement)
      Sets the "then" part of this if statement.

      Special note: The Java language does not allow a local variable declaration to appear as the "then" part of an if statement (they may only appear within a block). However, the AST will allow a VariableDeclarationStatement as the thenStatement of a IfStatement. To get something that will compile, be sure to embed the VariableDeclarationStatement inside a Block.

      Parameters:
      statement - the "then" statement node
      Throws:
      IllegalArgumentException - if:
      • the node belongs to a different AST
      • the node already has a parent
      • a cycle in would be created

    • getElseStatement

      public Statement getElseStatement()
      Returns the "else" part of this if statement, or null if this if statement has no "else" part.

      Note that there is a subtle difference between having no else statement and having an empty statement ("{}") or null statement (";").

      Returns:
      the "else" statement node, or null if none

    • setElseStatement

      public void setElseStatement(Statement statement)
      Sets or clears the "else" part of this if statement.

      Note that there is a subtle difference between having no else part (as in "if(true){}") and having an empty block (as in "if(true){}else{}") or null statement (as in "if(true){}else;").

      Special note: The Java language does not allow a local variable declaration to appear as the "else" part of an if statement (they may only appear within a block). However, the AST will allow a VariableDeclarationStatement as the elseStatement of a IfStatement. To get something that will compile, be sure to embed the VariableDeclarationStatement inside a Block.

      Parameters:
      statement - the "else" statement node, or null if there is none
      Throws:
      IllegalArgumentException - if:
      • the node belongs to a different AST
      • the node already has a parent
      • a cycle in would be created