org.josql.functions

类 GroupingFunctions

java.lang.Object

org.josql.functions.AbstractFunctionHandler

org.josql.functions.GroupingFunctions

所有已实现的接口:

FunctionHandler

public class GroupingFunctions
extends AbstractFunctionHandler

字段概要

字段

限定符和类型	字段和说明
static String	HANDLER_ID
static String	VALUE

从类继承的字段 org.josql.functions.AbstractFunctionHandler

q

构造器概要

构造器

构造器和说明
GroupingFunctions()

方法概要

限定符和类型	方法和说明
Double	avg(Expression exp)
Double	avg(List allobjs, Expression exp)
Double	avg(List allobjs, Expression exp, String saveValueName)
void	checkType(Object o, Class expected, Expression exp)
String	concat(Expression exp)
String	concat(List allobjs, Expression exp)
String	concat(List allobjs, Expression exp, String sep)
String	concat(List allobjs, Expression exp, String sep, String saveValueName)
Object	greatest(List allobjs, Expression exp)
Object	greatest(List allobjs, Expression exp, String saveValueName)
Object	greatestObject(List allobjs, Expression exp)
Object	least(List allobjs, Expression exp)
Object	least(List allobjs, Expression exp, String saveValueName)
Object	leastObject(List allobjs, Expression exp)
Object	max(Expression exp)
Object	max(List allobjs, Expression exp)
Object	max(List allobjs, Expression exp, String saveValueName)
Map.Entry	maxEntry(Map m, String type)
Object	maxObject(Expression exp)
Object	maxObject(List allobjs, Expression exp)
Object	min(Expression exp)
Object	min(List allobjs, Expression exp)
Object	min(List allobjs, Expression exp, String saveValueName)
Map.Entry	minEntry(Map m, String type)
Map.Entry	minEntry(Object m, String type)
Object	minObject(Expression exp)
Object	minObject(List allobjs, Expression exp)
Map	occurrence(List objs) A function that will take each item from the passed in List and determine a "count" for each item, i.e. how many times each item appears.
Map	occurrence(List objs, Expression exp) A function that will take each item from the passed in List and determine a "count" for each item, i.e. how many times each item appears.
Map	occurrence(List objs, Expression exp, Expression limitExp)
Double	sum(Expression exp)
Double	sum(List objs, Expression exp)
Double	sum(List allobjs, Expression exp, String saveValueName)
Double	sum(List objs, String acc)

从类继承的方法 org.josql.functions.AbstractFunctionHandler

setQuery

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

VALUE

public static final String VALUE

另请参阅:

常量字段值

HANDLER_ID

public static final String HANDLER_ID

另请参阅:

常量字段值

构造器详细资料

GroupingFunctions

public GroupingFunctions()

方法详细资料

least

public Object least(List allobjs,
                    Expression exp,
                    String saveValueName)
             throws QueryExecutionException

抛出:

QueryExecutionException

minObject

public Object minObject(Expression exp)
                 throws QueryExecutionException

抛出:

QueryExecutionException

minObject

public Object minObject(List allobjs,
                        Expression exp)
                 throws QueryExecutionException

抛出:

QueryExecutionException

leastObject

public Object leastObject(List allobjs,
                          Expression exp)
                   throws QueryExecutionException

抛出:

QueryExecutionException

maxObject

public Object maxObject(List allobjs,
                        Expression exp)
                 throws QueryExecutionException

抛出:

QueryExecutionException

maxObject

public Object maxObject(Expression exp)
                 throws QueryExecutionException

抛出:

QueryExecutionException

greatestObject

public Object greatestObject(List allobjs,
                             Expression exp)
                      throws QueryExecutionException

抛出:

QueryExecutionException

least

public Object least(List allobjs,
                    Expression exp)
             throws QueryExecutionException

抛出:

QueryExecutionException

min

public Object min(Expression exp)
           throws QueryExecutionException

抛出:

QueryExecutionException

min

public Object min(List allobjs,
                  Expression exp)
           throws QueryExecutionException

抛出:

QueryExecutionException

min

public Object min(List allobjs,
                  Expression exp,
                  String saveValueName)
           throws QueryExecutionException

抛出:

QueryExecutionException

maxEntry

public Map.Entry maxEntry(Map m,
                          String type)

minEntry

public Map.Entry minEntry(Object m,
                          String type)
                   throws QueryExecutionException

抛出:

QueryExecutionException

minEntry

public Map.Entry minEntry(Map m,
                          String type)

max

public Object max(List allobjs,
                  Expression exp,
                  String saveValueName)
           throws QueryExecutionException

抛出:

QueryExecutionException

greatest

public Object greatest(List allobjs,
                       Expression exp,
                       String saveValueName)
                throws QueryExecutionException

抛出:

QueryExecutionException

greatest

public Object greatest(List allobjs,
                       Expression exp)
                throws QueryExecutionException

抛出:

QueryExecutionException

max

public Object max(Expression exp)
           throws QueryExecutionException

抛出:

QueryExecutionException

max

public Object max(List allobjs,
                  Expression exp)
           throws QueryExecutionException

抛出:

QueryExecutionException

checkType

public void checkType(Object o,
                      Class expected,
                      Expression exp)
               throws QueryExecutionException

抛出:

QueryExecutionException

sum

public Double sum(List allobjs,
                  Expression exp,
                  String saveValueName)
           throws QueryExecutionException

抛出:

QueryExecutionException

sum

public Double sum(Expression exp)
           throws QueryExecutionException

抛出:

QueryExecutionException

sum

public Double sum(List objs,
                  Expression exp)
           throws QueryExecutionException

抛出:

QueryExecutionException

sum

public Double sum(List objs,
                  String acc)
           throws QueryExecutionException

抛出:

QueryExecutionException

concat

public String concat(List allobjs,
                     Expression exp,
                     String sep,
                     String saveValueName)
              throws QueryExecutionException

抛出:

QueryExecutionException

concat

public String concat(List allobjs,
                     Expression exp,
                     String sep)
              throws QueryExecutionException

抛出:

QueryExecutionException

concat

public String concat(Expression exp)
              throws QueryExecutionException

抛出:

QueryExecutionException

concat

public String concat(List allobjs,
                     Expression exp)
              throws QueryExecutionException

抛出:

QueryExecutionException

avg

public Double avg(List allobjs,
                  Expression exp,
                  String saveValueName)
           throws QueryExecutionException

抛出:

QueryExecutionException

avg

public Double avg(Expression exp)
           throws QueryExecutionException

抛出:

QueryExecutionException

avg

public Double avg(List allobjs,
                  Expression exp)
           throws QueryExecutionException

抛出:

QueryExecutionException

occurrence

public Map occurrence(List objs)
               throws QueryExecutionException

A function that will take each item from the passed in List and determine a "count" for each item, i.e. how many times each item appears.

参数:

objs - The List of objects to operate on.

返回:

A Map of object to a count of the number of times the object appears in the list.

抛出:

QueryExecutionException - Won't happen in this method.

occurrence

public Map occurrence(List objs,
                      Expression exp)
               throws QueryExecutionException

A function that will take each item from the passed in List and determine a "count" for each item, i.e. how many times each item appears.

参数:

objs - The List of objects to operate on.

exp - An optional expression that should be performed on each object and the value returned used instead.

返回:

A Map of object to a count of the number of times the object appears in the list.

抛出:

QueryExecutionException - If the expression cannot be evaluated.

occurrence

public Map occurrence(List objs,
                      Expression exp,
                      Expression limitExp)
               throws QueryExecutionException

抛出:

QueryExecutionException