程序包 cn.taketoday.bytecode.core

类 KeyFactory

java.lang.Object

cn.taketoday.bytecode.core.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.

作者:

Harry Yang

嵌套类概要

嵌套类

修饰符和类型	类	说明
static class	KeyFactory.Generator

字段概要

字段

修饰符和类型	字段	说明
static final Customizer	CLASS_BY_NAME
static final HashCodeCustomizer	HASH_ASM_TYPE	Type.hashCode() is very expensive as it traverses full descriptor to calculate hash code.

构造器概要

构造器

限定符	构造器	说明
protected	KeyFactory()

方法概要

修饰符和类型	方法	说明
static <T> T	create(Class<T> keyInterface)
static <T> T	create(Class<T> keyInterface, Customizer customizer)
static <T> T	create(Class<T> keyInterface, KeyFactoryCustomizer first, List<KeyFactoryCustomizer> next)
static <T> T	create(ClassLoader loader, Class<T> keyInterface, Customizer customizer)
static <T> T	create(ClassLoader loader, Class<T> keyInterface, KeyFactoryCustomizer customizer, List<KeyFactoryCustomizer> next)

从类继承的方法 java.lang.Object

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

字段详细资料

CLASS_BY_NAME

public static final Customizer CLASS_BY_NAME

HASH_ASM_TYPE

public static final 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.

构造器详细资料

KeyFactory

protected KeyFactory()

方法详细资料

create

public static <T> T create(Class<T> keyInterface)

create

public static <T> T create(Class<T> keyInterface,
 Customizer customizer)

create

public static <T> T create(Class<T> keyInterface,
 KeyFactoryCustomizer first,
 List<KeyFactoryCustomizer> next)

create

public static <T> T create(ClassLoader loader,
 Class<T> keyInterface,
 Customizer customizer)

create

public static <T> T create(ClassLoader loader,
 Class<T> keyInterface,
 KeyFactoryCustomizer customizer,
 List<KeyFactoryCustomizer> next)