Package org.eclipse.epsilon.eol.util

Class ReflectionUtil

  • public class ReflectionUtil
extends java.lang.Object

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.Class<?>[] discoverPublicClasses​(java.lang.Class<?> clazz)  
      static java.lang.Object executeMethod​(java.lang.Object obj, java.lang.reflect.Method method, ModuleElement ast, java.lang.Object... parameters)  
      static java.lang.Object executeMethod​(java.lang.Object obj, java.lang.String methodName, java.lang.Object... parameters)  
      static java.lang.reflect.Method findApplicableMethodOrThrow​(java.lang.Object obj, java.lang.String methodName, java.util.function.Predicate<java.lang.reflect.Method> criteria, java.util.Collection<?> parameters, ModuleElement ast, PrettyPrinterManager ppm)
      Searches for a method matching the name and criteria for the given object, including all super methods and super-interfaces recursively.
      static java.util.List<java.lang.reflect.Field> getAllInheritedInstanceFields​(java.lang.Class<?> klazz)  
      static java.lang.reflect.Field getField​(java.lang.Class<?> clazz, java.lang.String fieldName)
      Gets a field of a class using reflection by introspecting the class and its supertype(s)
      static java.lang.Object getFieldValue​(java.lang.Object object, java.lang.String fieldName)
      Returns the value of a field of an object
      static java.lang.reflect.Method getLegalMethod​(java.lang.Object obj, java.lang.reflect.Method method)
      This tries to find a method such that invoking via reflection won't be illegal in Java 9+
      static java.lang.reflect.Method getMethodFor​(java.lang.Object obj, java.lang.String methodName, java.lang.Object[] parameters, boolean includeInheritedMethods, boolean allowContravariantConversionForParameters)  
      protected static java.lang.String getMethodName​(java.lang.reflect.Method method)  
      static java.util.Set<java.lang.String> getMethodNames​(java.lang.Object obj, boolean includeInheritedMethods)  
      static java.lang.reflect.Method[] getMethodsFromPublicClassesForName​(java.lang.Object obj, java.lang.String methodName)  
      static boolean hasMethods​(java.lang.Object obj, java.lang.String methodName)  
      static boolean isInstance​(java.lang.Class<?> clazz, java.lang.Object instance)
      Checks if the instance is an instance of clazz Necessary because in Java, int.class != Integer.class etc
      static java.lang.String methodToString​(java.lang.reflect.Method method)
      Returns a string representation of the method

      • Methods inherited from class java.lang.Object

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

    • Method Detail

      • hasMethods

        public static boolean hasMethods​(java.lang.Object obj,
                                 java.lang.String methodName)

      • getMethodNames

        public static java.util.Set<java.lang.String> getMethodNames​(java.lang.Object obj,
                                                             boolean includeInheritedMethods)

      • getMethodName

        protected static java.lang.String getMethodName​(java.lang.reflect.Method method)

      • findApplicableMethodOrThrow

        public static java.lang.reflect.Method findApplicableMethodOrThrow​(java.lang.Object obj,
                                                                   java.lang.String methodName,
                                                                   java.util.function.Predicate<java.lang.reflect.Method> criteria,
                                                                   java.util.Collection<?> parameters,
                                                                   ModuleElement ast,
                                                                   PrettyPrinterManager ppm)
                                                            throws EolIllegalOperationException,
                                                                   EolIllegalOperationParametersException
        Searches for a method matching the name and criteria for the given object, including all super methods and super-interfaces recursively.
        Parameters:
        obj - The target object to look for methods on.
        methodName - The name of the method to find.
        criteria - Function which limits the search scope of methods.
        Returns:
        A method (chosen non-deterministically) which matches the criteria.
        Throws:
        EolIllegalOperationException - If no method matching the criteria can be found.
        EolIllegalOperationParametersException - If the method parameters are invalid.
        Since:
        1.6

      • discoverPublicClasses

        public static java.lang.Class<?>[] discoverPublicClasses​(java.lang.Class<?> clazz)
        Parameters:
        clazz -
        Returns:
        Since:
        1.6

      • getMethodsFromPublicClassesForName

        public static java.lang.reflect.Method[] getMethodsFromPublicClassesForName​(java.lang.Object obj,
                                                                            java.lang.String methodName)
        Parameters:
        obj -
        methodName -
        Returns:
        Since:
        1.6

      • getMethodFor

        public static java.lang.reflect.Method getMethodFor​(java.lang.Object obj,
                                                    java.lang.String methodName,
                                                    java.lang.Object[] parameters,
                                                    boolean includeInheritedMethods,
                                                    boolean allowContravariantConversionForParameters)
        Parameters:
        allowContravariantConversionForParameters - when false, parameters will have exactly the same class as the arguments to the returned method when true, parameters may have a type that is more specific than the arguments to the returned method

      • executeMethod

        public static java.lang.Object executeMethod​(java.lang.Object obj,
                                             java.lang.String methodName,
                                             java.lang.Object... parameters)
                                      throws java.lang.Throwable
        Throws:
        java.lang.Throwable

      • getLegalMethod

        public static java.lang.reflect.Method getLegalMethod​(java.lang.Object obj,
                                                      java.lang.reflect.Method method)
        This tries to find a method such that invoking via reflection won't be illegal in Java 9+
        Parameters:
        obj -
        method -
        Returns:
        Since:
        1.6

      • methodToString

        public static java.lang.String methodToString​(java.lang.reflect.Method method)
        Returns a string representation of the method
        Parameters:
        method -
        Returns:

      • getFieldValue

        public static java.lang.Object getFieldValue​(java.lang.Object object,
                                             java.lang.String fieldName)
        Returns the value of a field of an object
        Parameters:
        object -
        fieldName -
        Returns:

      • getField

        public static java.lang.reflect.Field getField​(java.lang.Class<?> clazz,
                                               java.lang.String fieldName)
        Gets a field of a class using reflection by introspecting the class and its supertype(s)
        Parameters:
        clazz -
        fieldName -
        Returns:

      • isInstance

        public static boolean isInstance​(java.lang.Class<?> clazz,
                                 java.lang.Object instance)
        Checks if the instance is an instance of clazz Necessary because in Java, int.class != Integer.class etc
        Parameters:
        clazz -
        instance -
        Returns:

      • getAllInheritedInstanceFields

        public static java.util.List<java.lang.reflect.Field> getAllInheritedInstanceFields​(java.lang.Class<?> klazz)