程序包 org.hibernate.internal.util

类 ReflectHelper

  • public final class ReflectHelper
extends Object
    Utility class for various reflection operations.
    作者:
    Gavin King, Steve Ebersole, Chris Cranford

    • 字段详细资料

      • NO_PARAM_SIGNATURE

        public static final Class[] NO_PARAM_SIGNATURE

      • NO_PARAMS

        public static final Object[] NO_PARAMS

      • SINGLE_OBJECT_PARAM_SIGNATURE

        public static final Class[] SINGLE_OBJECT_PARAM_SIGNATURE

    • 方法详细资料

      • extractEqualsMethod

        public static Method extractEqualsMethod​(Class clazz)
                                  throws NoSuchMethodException
        Encapsulation of getting hold of a class's equals method.
        参数:
        clazz - The class from which to extract the equals method.
        返回:
        The equals method reference
        抛出:
        NoSuchMethodException - Should indicate an attempt to extract equals method from interface.

      • extractHashCodeMethod

        public static Method extractHashCodeMethod​(Class clazz)
                                    throws NoSuchMethodException
        Encapsulation of getting hold of a class's hashCode method.
        参数:
        clazz - The class from which to extract the hashCode method.
        返回:
        The hashCode method reference
        抛出:
        NoSuchMethodException - Should indicate an attempt to extract hashCode method from interface.

      • overridesEquals

        public static boolean overridesEquals​(Class clazz)
        Determine if the given class defines an Object.equals(java.lang.Object) override.
        参数:
        clazz - The class to check
        返回:
        True if clazz defines an equals override.

      • overridesHashCode

        public static boolean overridesHashCode​(Class clazz)
        Determine if the given class defines a Object.hashCode() override.
        参数:
        clazz - The class to check
        返回:
        True if clazz defines an hashCode override.

      • implementsInterface

        public static boolean implementsInterface​(Class clazz,
                                          Class intf)
        Determine if the given class implements the given interface.
        参数:
        clazz - The class to check
        intf - The interface to check it against.
        返回:
        True if the class does implement the interface, false otherwise.

      • isPublic

        public static boolean isPublic​(Class clazz,
                               Member member)
        Is this member publicly accessible.
        参数:
        clazz - The class which defines the member
        member - The member.
        返回:
        True if the member is publicly accessible, false otherwise.

      • reflectedPropertyClass

        public static Class reflectedPropertyClass​(String className,
                                           String name,
                                           ClassLoaderService classLoaderService)
                                    throws MappingException
        Attempt to resolve the specified property type through reflection.
        参数:
        className - The name of the class owning the property.
        name - The name of the property.
        classLoaderService - ClassLoader services
        返回:
        The type of the property.
        抛出:
        MappingException - Indicates we were unable to locate the property.

      • reflectedPropertyClass

        public static Class reflectedPropertyClass​(Class clazz,
                                           String name)
                                    throws MappingException
        Attempt to resolve the specified property type through reflection.
        参数:
        clazz - The class owning the property.
        name - The name of the property.
        返回:
        The type of the property.
        抛出:
        MappingException - Indicates we were unable to locate the property.

      • getDefaultConstructor

        public static <T> Constructor<T> getDefaultConstructor​(Class<T> clazz)
                                                throws PropertyNotFoundException
        Retrieve the default (no arg) constructor from the given class.
        参数:
        clazz - The class for which to retrieve the default ctor.
        返回:
        The default constructor.
        抛出:
        PropertyNotFoundException - Indicates there was not publicly accessible, no-arg constructor (todo : why PropertyNotFoundException???)

      • isAbstractClass

        public static boolean isAbstractClass​(Class clazz)
        Determine if the given class is declared abstract.
        参数:
        clazz - The class to check.
        返回:
        True if the class is abstract, false otherwise.

      • isFinalClass

        public static boolean isFinalClass​(Class clazz)
        Determine is the given class is declared final.
        参数:
        clazz - The class to check.
        返回:
        True if the class is final, false otherwise.

      • getConstructor

        public static Constructor getConstructor​(Class clazz,
                                         Type[] types)
                                  throws PropertyNotFoundException
        Retrieve a constructor for the given class, with arguments matching the specified Hibernate mapping types.
        参数:
        clazz - The class needing instantiation
        types - The types representing the required ctor param signature
        返回:
        The matching constructor.
        抛出:
        PropertyNotFoundException - Indicates we could not locate an appropriate constructor (todo : again with PropertyNotFoundException???)

      • findField

        public static Field findField​(Class containerClass,
                              String propertyName)

      • ensureAccessibility

        public static void ensureAccessibility​(AccessibleObject accessibleObject)

      • findGetterMethod

        public static Method findGetterMethod​(Class containerClass,
                                      String propertyName)

      • getterMethodOrNull

        public static Method getterMethodOrNull​(Class containerJavaType,
                                        String propertyName)

      • setterMethodOrNull

        public static Method setterMethodOrNull​(Class containerClass,
                                        String propertyName,
                                        Class propertyType)

      • findSetterMethod

        public static Method findSetterMethod​(Class containerClass,
                                      String propertyName,
                                      Class propertyType)

      • findGetterMethodForFieldAccess

        public static Method findGetterMethodForFieldAccess​(Field field,
                                                    String propertyName)
        Similar to getterMethodOrNull(java.lang.Class, java.lang.String), except that here we are just looking for the corresponding getter for a field (defined as field access) if one exists. We do not look at supers, although conceivably the super could declare the method as an abstract - but again, that is such an edge case...