程序包 org.ssssssss.script.functions

类 StreamExtension

java.lang.Object

org.ssssssss.script.functions.StreamExtension

public class StreamExtension
extends Object

构造器概要

构造器

构造器	说明
StreamExtension()

方法概要

修饰符和类型	方法	说明
static List<Object>	arrayLikeToList(Object arrayLike)	将对象转为List
static Object	asBean(Object source, Class<?> target)
static Object	asBean(Object source, Class<?> target, boolean isArray)
Double	avg(Object target)	取平均值
Object	concat(Object src, Object... target)
Object	distinct(Object target)	数组去重
Object	distinct(Object target, Function<Object[],Object> condition)	数组去重
Object	each(Object target, Function<Object[],Object> function)	循环List
boolean	every(Object source, Function<Object[],Object> condition)
Object	filter(Object target, Function<Object[],Object> function)	对List进行过滤
Object	find(Object target, Function<Object[],Object> function)
int	findIndex(Object target, Function<Object[],Object> function)
Object	findNotNull(Object source)
static Object	first(Object source)
int	getLength(Object source)
Map<Object,List<Object>>	group(Object target, Function<Object[],Object> condition)	分组
Map<Object,Object>	group(Object target, Function<Object[],Object> condition, Function<Object[],Object> mapping)	分组
String	join(Object target)	将list拼接起来
List<Object>	join(Object source, Object target, Function<Object[],Object> condition)	合并两个集合，类似sql join 操作
List<Object>	join(Object source, Object target, Function<Object[],Object> condition, Function<Object[],Object> mapping)	合并两个集合，类似 sql join 操作
static String	join(Object target, String separator)	将list拼接起来
Object	last(Object source)
Object	limit(Object source, int value)
Object	map(Object target, Function<Object[],Object> function)	map 函数
Object	max(Object target)	取最大值
Object	min(Object target)	取最小值
Object	push(Object target, Object item)
Object	reduce(Object source, Function<Object[],Object> reduceFunction)
Object	reserve(Object target)	反转
Object	shuffle(Object target)	将list打乱
int	size(Object arrayLike)
Object	skip(Object source, int value)
boolean	some(Object source, Function<Object[],Object> condition)
Object	sort(Object target, Function<Object[],Object> function)	排序
Number	sum(Object target)	累计求和
Map<Object,Object>	toMap(Object src, Function<Object[],Object> mappingKey)
Map<Object,Object>	toMap(Object src, Function<Object[],Object> mappingKey, Function<Object[],Object> mappingValue)

从类继承的方法 java.lang.Object

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

构造器详细资料

StreamExtension

public StreamExtension()

方法详细资料

arrayLikeToList

@Comment("\u5c06\u5bf9\u8c61\u8f6c\u4e3aList")
public static List<Object> arrayLikeToList(Object arrayLike)

将对象转为List

join

@Comment("\u5c06\u96c6\u5408\u4f7f\u7528\u8fde\u63a5\u7b26\u62fc\u63a5\u8d77\u6765")
public static String join(Object target,
 @Comment(name="separator",value="\u62fc\u63a5\u7b26\uff0c\u5982`,`")
 String separator)

将list拼接起来

asBean

@Comment("\u5c06\u96c6\u5408\u8f6c\u4e3aJavaBean")
public static Object asBean(Object source,
 @Comment(name="target",value="\u76ee\u6807\u7c7b\u578b")
 Class<?> target)

asBean

@Comment("\u5c06\u96c6\u5408\u8f6c\u4e3aJavaBean")
public static Object asBean(Object source,
 @Comment(name="target",value="\u76ee\u6807\u7c7b\u578b")
 Class<?> target,
 @Comment(name="isArray",value="\u662f\u5426\u662f\u6570\u7ec4")
 boolean isArray)

push

@Comment(value="\u5411\u96c6\u5408\u4e2d\u6dfb\u52a0\u5143\u7d20",
         origin=true)
public Object push(Object target,
 @Comment(name="item",value="\u8981\u6dfb\u52a0\u7684\u5143\u7d20")
 Object item)

map

@Comment(value="\u5c06\u96c6\u5408\u8fdb\u884c\u8f6c\u6362\uff0c\u5e76\u8fd4\u56de\u65b0\u96c6\u5408",
         origin=true)
public Object map(Object target,
 @Comment(name="function",value="\u8f6c\u6362\u51fd\u6570\uff0c\u5982\u63d0\u53d6\u5c5e\u6027`(item)=>item.xxx`")
 Function<Object[],Object> function)

map 函数

参数:

function - 回调函数

filter

@Comment(value="\u5c06\u96c6\u5408\u8fdb\u884c\u8fc7\u6ee4\uff0c\u5e76\u8fd4\u56de\u65b0\u96c6\u5408",
         origin=true)
public Object filter(Object target,
 @Comment(name="function",value="\u8fc7\u6ee4\u6761\u4ef6\uff0c\u5982`(item)=>item.xxx == 1`")
 Function<Object[],Object> function)

对List进行过滤

参数:

function - 回调函数

find

@Comment("\u67e5\u627e\u5143\u7d20")
public Object find(Object target,
 @Comment(name="function",value="\u5339\u914d\u6761\u4ef6\uff0c\u5982`(item)=>item.xxx == 1`")
 Function<Object[],Object> function)

findIndex

@Comment("\u67e5\u627e\u5143\u7d20\u7d22\u5f15")
public int findIndex(Object target,
 @Comment(name="function",value="\u5339\u914d\u6761\u4ef6\uff0c\u5982`(item)=>item.xxx == 1`")
 Function<Object[],Object> function)

concat

@Comment(value="\u5408\u5e76\u591a\u4e2a\u96c6\u5408, \u8fd4\u56de\u65b0\u7684\u96c6\u5408",
         origin=true)
public Object concat(Object src,
 @Comment(name="target",value="\u96c6\u5408")
 Object... target)

toMap

@Comment("\u96c6\u5408\u8f6c\u4e3aMap")
public Map<Object,Object> toMap(Object src,
 @Comment(name="mappingKey",value="key\u503c")
 Function<Object[],Object> mappingKey,
 @Comment(name="mappingValue",value="value\u503c")
 Function<Object[],Object> mappingValue)

toMap

@Comment("\u96c6\u5408\u8f6c\u4e3aMap")
public Map<Object,Object> toMap(Object src,
 @Comment(name="mappingKey",value="key\u503c")
 Function<Object[],Object> mappingKey)

each

@Comment(value="\u5c06\u96c6\u5408\u8fdb\u884c\u5faa\u73af\u64cd\u4f5c\uff0c\u5e76\u8fd4\u56de\u65b0\u96c6\u5408",
         origin=true)
public Object each(Object target,
 @Comment(name="function",value="\u5faa\u73af\u51fd\u6570\uff0c\u5982\u5faa\u73af\u6dfb\u52a0\u5c5e\u6027`(item)=>{item.xxx = \'newVal\'}`")
 Function<Object[],Object> function)

循环List

参数:

function - 回调函数

sort

@Comment(value="\u5c06\u96c6\u5408\u8fdb\u884c\u6392\u5e8f\uff0c\u5e76\u8fd4\u56de\u65b0\u96c6\u5408",
         origin=true)
public Object sort(Object target,
 @Comment(name="function",value="\u6392\u5e8f\u51fd\u6570\uff0c\u5982\u4ece\u5927\u5230\u5c0f`(a,b)=>a-b`")
 Function<Object[],Object> function)

排序

reserve

@Comment(value="\u5c06\u96c6\u5408\u8fdb\u884c\u53cd\u8f6c\u64cd\u4f5c",
         origin=true)
public Object reserve(Object target)

反转

shuffle

@Comment(value="\u5c06\u96c6\u5408\u7684\u987a\u5e8f\u6253\u4e71",
         origin=true)
public Object shuffle(Object target)

将list打乱

distinct

@Comment(value="\u96c6\u5408\u53bb\u91cd",
         origin=true)
public Object distinct(Object target)

数组去重

从以下版本开始:

1.4.6

distinct

@Comment(value="\u96c6\u5408\u53bb\u91cd",
         origin=true)
public Object distinct(Object target,
 @Comment(name="condition",value="\u53bb\u91cd\u8f6c\u6362\u5668\uff0c\u5982\u6839\u636eid\u53bb\u91cd `item=>item.id`")
 Function<Object[],Object> condition)

数组去重

从以下版本开始:

1.6.2

join

@Comment("\u5c06\u96c6\u5408\u4f7f\u7528`,`\u62fc\u63a5\u8d77\u6765")
public String join(Object target)

将list拼接起来

max

@Comment("\u53d6\u51fa\u96c6\u5408\u6700\u5927\u503c\uff0c\u5982\u679c\u627e\u4e0d\u5230\u8fd4\u56de`null`")
public Object max(Object target)

取最大值

min

@Comment("\u53d6\u51fa\u96c6\u5408\u6700\u5c0f\u503c\uff0c\u5982\u679c\u627e\u4e0d\u5230\u8fd4\u56de`null`")
public Object min(Object target)

取最小值

avg

@Comment("\u53d6\u51fa\u96c6\u5408\u5e73\u5747\u503c\uff0c\u5982\u679c\u65e0\u6cd5\u8ba1\u7b97\u8fd4\u56de`null`")
public Double avg(Object target)

取平均值

sum

@Comment("\u5bf9\u96c6\u5408\u8fdb\u884c\u7d2f\u52a0\u64cd\u4f5c")
public Number sum(Object target)

累计求和

group

@Comment("\u5bf9\u96c6\u5408\u8fdb\u884c\u5206\u7ec4")
public Map<Object,List<Object>> group(Object target,
 @Comment(name="condition",value="\u5206\u7ec4\u6761\u4ef6\uff0c\u5982`item=>item.xxx + \'_\' + item.yyy`")
 Function<Object[],Object> condition)

分组

参数:

condition - 分组条件

group

@Comment("\u5bf9\u96c6\u5408\u8fdb\u884c\u5206\u7ec4\u5e76\u8f6c\u6362")
public Map<Object,Object> group(Object target,
 @Comment(name="condition",value="\u5206\u7ec4\u6761\u4ef6\uff0c\u5982`item=>item.xxx + \'_\' + item.yyy`")
 Function<Object[],Object> condition,
 @Comment(name="mapping",value="\u8f6c\u6362\u51fd\u6570\uff0c\u5982\u5206\u7ec4\u6c42\u548c`(list)=>list.sum()`")
 Function<Object[],Object> mapping)

分组

参数:

condition - 分组条件

mapping - 结果映射

join

@Comment("\u5c06\u4e24\u4e2a\u96c6\u5408\u5173\u8054\u8d77\u6765")
public List<Object> join(Object source,
 @Comment(name="target",value="\u53e6\u4e00\u4e2a\u96c6\u5408")
 Object target,
 @Comment(name="condition",value="\u5173\u8054\u6761\u4ef6\uff0c\u5982:`(left,right)=>left.xxx = right.xxx`")
 Function<Object[],Object> condition)

合并两个集合，类似sql join 操作

参数:

source - 左表

target - 右表

condition - 条件

join

@Comment("\u5c06\u4e24\u4e2a\u96c6\u5408\u5173\u8054\u5e76\u8f6c\u6362")
public List<Object> join(Object source,
 @Comment(name="target",value="\u53e6\u4e00\u4e2a\u96c6\u5408")
 Object target,
 @Comment(name="condition",value="\u5173\u8054\u6761\u4ef6\uff0c\u5982:`(left,right)=>left.xxx == right.xxx`")
 Function<Object[],Object> condition,
 @Comment(name="mapping",value="\u6620\u5c04\u51fd\u6570\uff0c\u5982:`(left,right)=>{xxx : left.xxx, yyy : right.yyy}`")
 Function<Object[],Object> mapping)

合并两个集合，类似 sql join 操作

参数:

source - 左表

target - 右表

condition - 条件

mapping - 映射

skip

@Comment(value="\u622a\u53d6\u96c6\u5408",
         origin=true)
public Object skip(Object source,
 @Comment(name="value",value="\u8df3\u8fc7\u7684\u6570\u91cf")
 int value)

limit

@Comment(value="\u9650\u5236\u96c6\u5408\u6570\u91cf",
         origin=true)
public Object limit(Object source,
 @Comment(name="value",value="\u8df3\u8fc7\u7684\u6570\u91cf")
 int value)

every

@Comment("\u5224\u65ad\u96c6\u5408\u662f\u5426\u90fd\u6ee1\u8db3\u6761\u4ef6")
public boolean every(Object source,
 @Comment(name="condition",value="\u5224\u65ad\u6761\u4ef6")
 Function<Object[],Object> condition)

some

@Comment("\u5224\u65ad\u96c6\u5408\u4e2d\u662f\u5426\u81f3\u5c11\u6709\u4e00\u4e2a\u5143\u7d20\u6ee1\u8db3\u6761\u4ef6")
public boolean some(Object source,
 @Comment(name="condition",value="\u5224\u65ad\u6761\u4ef6")
 Function<Object[],Object> condition)

findNotNull

@Comment("\u627e\u5230\u96c6\u5408\u4e2d\u7b2c\u4e00\u4e2a\u4e0d\u4e3anull\u7684\u5143\u7d20")
public Object findNotNull(Object source)

reduce

@Comment("\u5faa\u73af\u96c6\u5408\u901a\u8fc7\u7ed9\u5b9a\u7684\u8ba1\u7b97\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u65b0\u503c")
public Object reduce(Object source,
 @Comment(name="reduceFunction",value="\u5904\u7406\u51fd\u6570\uff0c\u5982\u7d2f\u52a0\u8ba1\u7b97\uff1a`(val,item)=>val + item`")
 Function<Object[],Object> reduceFunction)

first

@Comment("\u8fd4\u56de\u96c6\u5408\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20")
public static Object first(Object source)

last

@Comment("\u8fd4\u56de\u96c6\u5408\u4e2d\u7684\u6700\u540e\u4e00\u4e2a\u5143\u7d20")
public Object last(Object source)

size

@Comment("\u8fd4\u56de\u96c6\u5408\u6216\u6570\u7ec4\u7684\u957f\u5ea6")
public int size(Object arrayLike)

getLength

@Comment("\u8fd4\u56de\u96c6\u5408\u6216\u6570\u7ec4\u7684\u957f\u5ea6")
public int getLength(Object source)