程序包 org.springframework.cglib.core

类 KeyFactory

  • public abstract class KeyFactory
extends Object
    Generates classes to handle multi-valued keys, for use in things such as Maps and Sets. Code for equals and hashCode methods follow the the rules laid out in Effective Java by Joshua Bloch.

    To generate a KeyFactory, you need to supply an interface which describes the structure of the key. The interface should have a single method named newInstance, which returns an Object. The arguments array can be anything--Objects, primitive values, or single or multi-dimension arrays of either. For example: 

         private interface IntStringKey {
         public Object newInstance(int i, String s);
     }

    Once you have made a KeyFactory, you generate a new key by calling the newInstance method defined by your interface. 

         IntStringKey factory = (IntStringKey)KeyFactory.create(IntStringKey.class);
     Object key1 = factory.newInstance(4, "Hello");
     Object key2 = factory.newInstance(4, "World");

    Note:hashCode equality between two keys key1 and key2 is only guaranteed if key1.equals(key2)and the keys were produced by the same factory.

    • 字段详细资料

      • CLASS_BY_NAME

        public static final org.springframework.cglib.core.Customizer CLASS_BY_NAME

      • STORE_CLASS_AS_STRING

        public static final org.springframework.cglib.core.FieldTypeCustomizer STORE_CLASS_AS_STRING

      • HASH_ASM_TYPE

        public static final org.springframework.cglib.core.HashCodeCustomizer HASH_ASM_TYPE
        Type.hashCode() is very expensive as it traverses full descriptor to calculate hash code. This customizer uses Type.getSort() as a hash code.

      • OBJECT_BY_CLASS

        @Deprecated
public static final org.springframework.cglib.core.Customizer OBJECT_BY_CLASS
        已过时。
        this customizer might result in unexpected class leak since key object still holds a strong reference to the Object and class. It is recommended to have pre-processing method that would strip Objects and represent Classes as Strings

    • 构造器详细资料

    • 方法详细资料

      • create

        public static KeyFactory create​(Class keyInterface,
                                org.springframework.cglib.core.Customizer customizer)

      • create

        public static KeyFactory create​(Class keyInterface,
                                org.springframework.cglib.core.KeyFactoryCustomizer first,
                                List<org.springframework.cglib.core.KeyFactoryCustomizer> next)

      • create

        public static KeyFactory create​(ClassLoader loader,
                                Class keyInterface,
                                org.springframework.cglib.core.KeyFactoryCustomizer customizer,
                                List<org.springframework.cglib.core.KeyFactoryCustomizer> next)