com.aliyun.openservices.ons.api

Enum ExpressionType

java.lang.Object

java.lang.Enum<ExpressionType>

com.aliyun.openservices.ons.api.ExpressionType

All Implemented Interfaces:

Serializable, Comparable<ExpressionType>

public enum ExpressionType
extends Enum<ExpressionType>

Enum Constant Summary

Enum Constants

Enum Constant and Description
SQL92 消息属性过滤，采用简单的SQL语法。
TAG 消息标签过滤，只支持或运算，eg: "tag1 || tag2 || tag3"

Method Summary

Methods

Modifier and Type	Method and Description
static ExpressionType	valueOf(String name) Returns the enum constant of this type with the specified name.
static ExpressionType[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

SQL92

public static final ExpressionType SQL92

消息属性过滤，采用简单的SQL语法。

语法关键字:
• AND, OR, NOT, BETWEEN, IN, TRUE, FALSE, IS, NULL

数据类型:
• 布尔, 如: TRUE, FALSE
• 字符, 如: 'abc'
• 整数, 如: 123
• 长整数, 如: 123L
• 浮点数, 如: 3.1415

语法:
• AND, OR
• >, >=, <, <=, =
• BETWEEN A AND B, 等价于 >=A AND <=B
• NOT BETWEEN A AND B, 等价于 >B OR <A
• IN ('a', 'b'), 等价于 ='a' OR ='b', 只支持String类型.
• IS NULL, IS NOT NULL, 检查属性是否为NUll.
• =TRUE, =FALSE, 检查属性为真或假.

如:
(a > 10 AND a < 100) OR (b IS NOT NULL AND b=TRUE)
表示需要属性a大于10并且a小于100，或者需要属性b不为空并且为真的消息

TAG

public static final ExpressionType TAG

消息标签过滤，只支持或运算，eg: "tag1 || tag2 || tag3"

Method Detail

values

public static ExpressionType[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (ExpressionType c : ExpressionType.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static ExpressionType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null