Method Detail

• public static boolean isNullConstant(Expression expression)

  Checks whether the supplied expression is the null literal.

  Parameters:

  expression - the expression to inspect

  Returns:

  true if the expression is a null constant

• public static boolean isNumberOrArrayOfNumber(ClassNode targetType, boolean recurse)

  Determines if a type is derived from Number (or array thereof).

  Parameters:

  targetType - the candidate type

  recurse - true if we can have multi-dimension arrays; should be false for annotation member types

  Returns:

  true if the type equals the targetType or array thereof

• public static boolean isSuperExpression(Expression expression)

  Checks whether the supplied expression references super.

  Parameters:

  expression - the expression to inspect

  Returns:

  true if the expression is a super reference

• public static boolean isThisExpression(Expression expression)

  Checks whether the supplied expression references this.

  Parameters:

  expression - the expression to inspect

  Returns:

  true if the expression is a this reference

• public static boolean isThisOrSuper(Expression expression)

  Checks whether the supplied expression references this or super.

  Parameters:

  expression - the expression to inspect

  Returns:

  true if the expression is either a this or super reference

• public static boolean isTypeOrArrayOfType(ClassNode targetType, ClassNode type, boolean recurse)

  Determines if a type matches another type (or array thereof).

  Parameters:

  targetType - the candidate type

  type - the type we are checking against

  recurse - true if we can have multi-dimension arrays; should be false for annotation member types

  Returns:

  true if the type equals the targetType or array thereof

• public static ConstantExpression transformBinaryConstantExpression(BinaryExpression be, ClassNode targetType)

  Converts expressions like ConstantExpression(40) + ConstantExpression(2) into the simplified ConstantExpression(42) at compile time.

  Parameters:

  be - the binary expression

  targetType - the type of the result

  Returns:

  the transformed expression or the original if no transformation was performed

• public static Expression transformInlineConstants(Expression exp)

  Transforms constants that would appear in annotations so they aren't lost. Subsequent processing determines whether they are valid, this retains the constant value as a constant expression.

  The attribute values of annotations must be primitive, string, annotation or enumeration constants. In various places such constants can be seen during type resolution but won't be readily accessible in later phases, e.g. they might be embedded into constructor code.

  Parameters:

  exp - the original expression

  Returns:

  original or transformed expression

• public static Expression transformInlineConstants(Expression exp, ClassNode attrType)

  Converts simple expressions of constants into pre-evaluated simple constants. Handles:

  • Property expressions - referencing constants
  • Variable expressions - referencing constants
  • Typecast expressions - referencing constants
  • Binary expressions - string concatenation and numeric +, -, /, *
  • List expressions - list of constants

  Parameters:

  exp - the original expression

  attrType - the type that the final constant should be

  Returns:

  the transformed type or the original if no transformation was possible

• public static Expression transformListOfConstants(ListExpression origList, ClassNode attrType)

  Given a list of constants, transform each item in the list.

  Parameters:

  origList - the list to transform

  attrType - the target type

  Returns:

  the transformed list or the original if nothing was changed