Package org.jboss.byteman.rule.expression

Class StaticExpression

  • public class StaticExpression
extends AssignableExpression
    an expression which identifies a static field reference

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private java.lang.reflect.Field field  
      private int fieldIndex  
      private java.lang.String fieldName  
      private boolean isPublicField  
      private Type ownerType  
      private java.lang.String ownerTypeName
      the list of path components which may include package qualifiers, the class name, the field name and subordinate field references

    • Constructor Summary

      Constructors 
      Constructor Description
      StaticExpression​(Rule rule, Type type, ParseNode token, java.lang.String fieldName, java.lang.String ownerTypeName)  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void bind()
      verify that variables mentioned in this expression are actually available in the supplied bindings list and infer/validate the type of this expression or its subexpressions where possible
      void bindAssign()
      treat this as a normal bind because an update to a field reference does not update any bindings
      void compile​(org.objectweb.asm.MethodVisitor mv, CompileContext compileContext)  
      void compileAssign​(org.objectweb.asm.MethodVisitor mv, CompileContext compileContext)
      compile an assignment to the referenced location using the value on the top of the Java stack.
      java.lang.Object interpret​(HelperAdapter helper)
      evaluate the expression by interpreting the expression tree
      java.lang.Object interpretAssign​(HelperAdapter helperAdapter, java.lang.Object value)
      execute an assignment to the referenced location by interpretation of the expression, using the object passed in this call
      private java.lang.reflect.Field lookupField​(java.lang.Class<?> ownerClazz, boolean isAssign)  
      Type typeCheck​(Type expected)
      ensure that all type references in the expression and its component expressions can be resolved, that the type of the expression is well-defined and that it is compatible with the type expected in the context in which it occurs.
      void typeCheckAny​(boolean isAssign)  
      Type typeCheckAssign​(Type expected)
      typecheck the expression as an lvalue of an assignment operation
      void writeTo​(java.io.StringWriter stringWriter)  

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Field Detail

      • ownerTypeName

        private java.lang.String ownerTypeName
        the list of path components which may include package qualifiers, the class name, the field name and subordinate field references

      • fieldName

        private java.lang.String fieldName

      • field

        private java.lang.reflect.Field field

      • ownerType

        private Type ownerType

      • isPublicField

        private boolean isPublicField

      • fieldIndex

        private int fieldIndex

    • Constructor Detail

      • StaticExpression

        public StaticExpression​(Rule rule,
                        Type type,
                        ParseNode token,
                        java.lang.String fieldName,
                        java.lang.String ownerTypeName)

    • Method Detail

      • bind

        public void bind()
          throws TypeException
        verify that variables mentioned in this expression are actually available in the supplied bindings list and infer/validate the type of this expression or its subexpressions where possible
        Specified by:
        bind in class Expression
        Throws:
        TypeException - if any variable is missing or has the wrong type

      • bindAssign

        public void bindAssign()
                throws TypeException
        treat this as a normal bind because an update to a field reference does not update any bindings
        Specified by:
        bindAssign in class AssignableExpression
        Throws:
        TypeException - if any variable is missing or has the wrong type

      • typeCheck

        public Type typeCheck​(Type expected)
               throws TypeException
        Description copied from class: Expression
        ensure that all type references in the expression and its component expressions can be resolved, that the type of the expression is well-defined and that it is compatible with the type expected in the context in which it occurs.
        Specified by:
        typeCheck in class Expression
        Parameters:
        expected - the type expected for the expression in the contxet in which it occurs. this may be void but should not be undefined at the point where type checking is performed.
        Returns:
        the type of the expression
        Throws:
        TypeException - if a type check failure occurs

      • interpret

        public java.lang.Object interpret​(HelperAdapter helper)
                           throws ExecuteException
        Description copied from class: Expression
        evaluate the expression by interpreting the expression tree
        Specified by:
        interpret in class Expression
        Parameters:
        helper - an execution context associated with the rule which contains a map of current bindings for rule variables and another map of their declared types both of which are indexed by variable name. This includes entries for the helper (name "-1"), the recipient if the trigger method is not static (name "0") and the trigger method arguments (names "1", ...)
        Returns:
        the result of evaluation as an Object
        Throws:
        ExecuteException - if an error occurs during execution

      • writeTo

        public void writeTo​(java.io.StringWriter stringWriter)
        Specified by:
        writeTo in class Expression

      • interpretAssign

        public java.lang.Object interpretAssign​(HelperAdapter helperAdapter,
                                        java.lang.Object value)
                                 throws ExecuteException
        Description copied from class: AssignableExpression
        execute an assignment to the referenced location by interpretation of the expression, using the object passed in this call
        Specified by:
        interpretAssign in class AssignableExpression
        Parameters:
        helperAdapter - an execution context associated with the rule which contains a map of current bindings for rule variables and another map of their declared types both of which are indexed by variable name. This includes entries for the helper (name "-1"), the recipient if the trigger method is not static (name "0") and the trigger method arguments (names "1", ...)
        value - the value to be assigned to this object
        Returns:
        the result of evaluation as an Object
        Throws:
        ExecuteException - if an error occurs during execution

      • lookupField

        private java.lang.reflect.Field lookupField​(java.lang.Class<?> ownerClazz,
                                            boolean isAssign)
                                     throws java.lang.NoSuchFieldException
        Throws:
        java.lang.NoSuchFieldException