Package org.apache.groovy.ast.tools
Class ExpressionUtils
java.lang.Object
org.apache.groovy.ast.tools.ExpressionUtils
public final class ExpressionUtils
extends java.lang.Object
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Method SummaryModifier and Type Method Description static booleanisNullConstant(Expression expr)static booleanisNumberOrArrayOfNumber(ClassNode targetType, boolean recurse)Determine if a type is derived from Number (or array thereof).static booleanisSuperExpression(Expression expression)static booleanisThisExpression(Expression expression)static booleanisThisOrSuper(Expression expression)static booleanisTypeOrArrayOfType(ClassNode targetType, ClassNode type, boolean recurse)Determine if a type matches another type (or array thereof).static ConstantExpressiontransformBinaryConstantExpression(BinaryExpression be, ClassNode targetType)Turns expressions of the form ConstantExpression(40) + ConstantExpression(2) into the simplified ConstantExpression(42) at compile time.static ExpressiontransformInlineConstants(Expression exp)The attribute values of annotations must be primitive, String or Enum constants.static ExpressiontransformInlineConstants(Expression exp, ClassNode attrType)Converts simple expressions of constants into pre-evaluated simple constants.static ExpressiontransformListOfConstants(ListExpression origList, ClassNode attrType)Given a list of constants, transform each item in the list.Methods inherited from class java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Method Details- 
transformBinaryConstantExpressionpublic 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
 
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isTypeOrArrayOfTypeDetermine 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
 
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isNumberOrArrayOfNumberDetermine 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
 
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transformInlineConstantsConverts 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
 
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transformListOfConstantsGiven 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
 
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transformInlineConstantsThe 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
 
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isThisExpression
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isSuperExpression
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isThisOrSuper
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isNullConstant
 
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