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

构造器和说明
StreamExtension()

方法概要

限定符和类型	方法和说明
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	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	findNotNull(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	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
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

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

将对象转为List

push

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

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(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(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

join

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

将list拼接起来

join

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

将list拼接起来

max

@Comment(value="\u53d6\u51fa\u96c6\u5408\u6700\u5927\u503c\uff0c\u5982\u679c\u627e\u4e0d\u5230\u8fd4\u56denull")
public Object max(Object target)

取最大值

min

@Comment(value="\u53d6\u51fa\u96c6\u5408\u6700\u5c0f\u503c\uff0c\u5982\u679c\u627e\u4e0d\u5230\u8fd4\u56denull")
public Object min(Object target)

取最小值

avg

@Comment(value="\u53d6\u51fa\u96c6\u5408\u5e73\u5747\u503c\uff0c\u5982\u679c\u65e0\u6cd5\u8ba1\u7b97\u8fd4\u56denull")
public Double avg(Object target)

取平均值

sum

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

累计求和

group

@Comment(value="\u5bf9\u96c6\u5408\u8fdb\u884c\u5206\u7ec4")
public Map<Object,List<Object>> group(Object target,
                                                                                                    @Comment(value="\u5206\u7ec4\u6761\u4ef6\uff0c\u5982item=>item.xxx + \'_\' + item.yyy")
                                                                                                    Function<Object[],Object> condition)

分组

参数:

condition - 分组条件

group

@Comment(value="\u5bf9\u96c6\u5408\u8fdb\u884c\u5206\u7ec4\u5e76\u8f6c\u6362")
public Map<Object,Object> group(Object target,
                                                                                                                @Comment(value="\u5206\u7ec4\u6761\u4ef6\uff0c\u5982item=>item.xxx + \'_\' + item.yyy")
                                                                                                                Function<Object[],Object> condition,
                                                                                                                @Comment(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(value="\u5c06\u4e24\u4e2a\u96c6\u5408\u5173\u8054\u8d77\u6765")
public List<Object> join(Object source,
                                                                                                   @Comment(value="\u53e6\u4e00\u4e2a\u96c6\u5408")
                                                                                                   Object target,
                                                                                                   @Comment(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(value="\u5c06\u4e24\u4e2a\u96c6\u5408\u5173\u8054\u5e76\u8f6c\u6362")
public List<Object> join(Object source,
                                                                                                         @Comment(value="\u53e6\u4e00\u4e2a\u96c6\u5408")
                                                                                                         Object target,
                                                                                                         @Comment(value="\u5173\u8054\u6761\u4ef6\uff0c\u5982:(left,right)=>left.xxx == right.xxx")
                                                                                                         Function<Object[],Object> condition,
                                                                                                         @Comment(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

asBean

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

skip

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

every

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

some

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

findNotNull

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

reduce

@Comment(value="\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(value="\u5904\u7406\u51fd\u6570\uff0c\u5982\u7d2f\u52a0\u8ba1\u7b97\uff1a(val,item)=>val + item")
                                                                                                                                                           Function<Object[],Object> reduceFunction)

asBean

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