Method Detail

• public static boolean isNullConstant(Expression expr)

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

  Determine 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)

• public static boolean isThisExpression(Expression expression)

• public static boolean isThisOrSuper(Expression expression)

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

  Determine 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)

  Turns expressions of the form 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, ClassNode attrType)

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

  • Property expressions - referencing constants
  • Simple binary expressions - String concatenation and numeric +, -, /, *
  • List expressions - list of constants
  • Variable expressions - referencing 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 transformInlineConstants(Expression exp)

  The attribute values of annotations must be primitive, String or Enum 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. This method transforms constants that would appear in annotations early so they aren't lost. Subsequent processing determines whether they are valid, this method simply retains the constant value as a constant expression.

  Parameters:

  exp - the original expression

  Returns:

  the converted expression

• 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