Package edu.internet2.middleware.grouperClientExt.org.apache.commons.jexl2.internal.introspection

Class MethodKey

java.lang.Object
edu.internet2.middleware.grouperClientExt.org.apache.commons.jexl2.internal.introspection.MethodKey
public final class MethodKey extends Object
A method key usable by the introspector cache.

This stores a method (or class) name and parameters.

This replaces the original key scheme which used to build the key by concatenating the method name and parameters class names as one string with the exception that primitive types were converted to their object class equivalents.

The key is still based on the same information, it is just wrapped in an object instead. Primitive type classes are converted to they object equivalent to make a key; int foo(int) and int foo(Integer) do generate the same key.

A key can be constructed either from arguments (array of objects) or from parameters (array of class). Roughly 3x faster than string key to access the map & uses less memory.

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static class 
    MethodKey.AmbiguousException
    Simple distinguishable exception, used when we run across ambiguous overloading.

  • Constructor Summary

    Constructors
    Constructor
    Description
    MethodKey(String aMethod, Object[] args)
    Creates a key from a method name and a set of arguments.

  • Method Summary

    Modifier and Type
    Method
    Description
    String
    debugString()
    Outputs a human readable debug representation of this key.
    boolean
    equals(Object obj)
    Constructor<?>
    getMostSpecificConstructor(List<Constructor<?>> methods)
    Gets the most specific constructor that is applicable to the parameters of this key.
    Method
    getMostSpecificMethod(List<Method> methods)
    Gets the most specific method that is applicable to the parameters of this key.
    int
    hashCode()
    static boolean
    isInvocationConvertible(Class<?> formal, Class<?> actual, boolean possibleVarArg)
    Determines whether a type represented by a class object is convertible to another type represented by a class object using a method invocation conversion, treating object types of primitive types as if they were primitive types (that is, a Boolean actual parameter type matches boolean primitive formal type).
    static boolean
    isStrictInvocationConvertible(Class<?> formal, Class<?> actual, boolean possibleVarArg)
    Determines whether a type represented by a class object is convertible to another type represented by a class object using a method invocation conversion, without matching object and primitive types.
    String
    toString()

    Methods inherited from class java.lang.Object

    clone, finalize, getClass, notify, notifyAll, wait, wait, wait

  • Constructor Details

    • MethodKey

      public MethodKey(String aMethod, Object[] args)
      Creates a key from a method name and a set of arguments.
      Parameters:
      aMethod - the method to generate the key from
      args - the intended method arguments

  • Method Details

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • equals

      public boolean equals(Object obj)
      Overrides:
      equals in class Object

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • debugString

      public String debugString()
      Outputs a human readable debug representation of this key.
      Returns:
      method(p0, p1, ...)

    • getMostSpecificMethod

      public Method getMostSpecificMethod(List<Method> methods)
      Gets the most specific method that is applicable to the parameters of this key.
      Parameters:
      methods - a list of methods.
      Returns:
      the most specific method.
      Throws:
      MethodKey.AmbiguousException - if there is more than one.

    • getMostSpecificConstructor

      public Constructor<?> getMostSpecificConstructor(List<Constructor<?>> methods)
      Gets the most specific constructor that is applicable to the parameters of this key.
      Parameters:
      methods - a list of constructors.
      Returns:
      the most specific constructor.
      Throws:
      MethodKey.AmbiguousException - if there is more than one.

    • isInvocationConvertible

      public static boolean isInvocationConvertible(Class<?> formal, Class<?> actual, boolean possibleVarArg)
      Determines whether a type represented by a class object is convertible to another type represented by a class object using a method invocation conversion, treating object types of primitive types as if they were primitive types (that is, a Boolean actual parameter type matches boolean primitive formal type). This behavior is because this method is used to determine applicable methods for an actual parameter list, and primitive types are represented by their object duals in reflective method calls.
      Parameters:
      formal - the formal parameter type to which the actual parameter type should be convertible
      actual - the actual parameter type.
      possibleVarArg - whether or not we're dealing with the last parameter in the method declaration
      Returns:
      true if either formal type is assignable from actual type, or formal is a primitive type and actual is its corresponding object type or an object type of a primitive type that can be converted to the formal type.

    • isStrictInvocationConvertible

      public static boolean isStrictInvocationConvertible(Class<?> formal, Class<?> actual, boolean possibleVarArg)
      Determines whether a type represented by a class object is convertible to another type represented by a class object using a method invocation conversion, without matching object and primitive types. This method is used to determine the more specific type when comparing signatures of methods.
      Parameters:
      formal - the formal parameter type to which the actual parameter type should be convertible
      actual - the actual parameter type.
      possibleVarArg - whether or not we're dealing with the last parameter in the method declaration
      Returns:
      true if either formal type is assignable from actual type, or formal and actual are both primitive types and actual can be subject to widening conversion to formal.