wso2 CEP内置功能-isMatch
[英]wso2 CEP in-built function - isMatch
问题描述
I am trying to use CEP 3.1.0 with a built in function for regexp matching 
我正在尝试使用带有内置功能的CEP 3.1.0进行正则表达式匹配
from cseEventStream[isMatch('foo\sbar',symbol)]
which should match "foo bar" and not "foobar". 应该匹配“ foo bar”而不是“ foobar”。 However, this fails with an error mesage 但是，此操作失败并显示错误消息
mismatched character '\\' expecting '''
I have tried escaping with multiple '\\'. 我尝试使用多个'\\'转义。 Also, [isMatch('foo bar',symbol)] does not work. 另外，[isMatch（'foo bar'，symbol）]不起作用。 Although, from cseEventStream[symbol contains 'foo\\sbar'] is a temporary workaround, the inability to use '\\' is a severe limitation in regexp matching. 尽管从cseEventStream [符号包含'foo \\ sbar']开始是暂时的解决方法，但是无法使用'\\'是正则表达式匹配中的严重限制。
2 个解决方案
解决方案1
0 2014-06-02 07:51:14
Well it's looking for the '\\' character. 好吧，它正在寻找'\\'字符。 What does it say in the isMatch documentation? 在isMatch文档中怎么说？ As it says it is expecting a ' then maybe you have to use '\\ ?? 就像它说的那样，期望'，那么您可能必须使用'\\ ??
解决方案2
0 2014-06-06 06:55:23
It seems an issue with the siddhi compiler when handling "\\". 处理“ \\”时，siddhi编译器似乎存在问题。 I have raised a jira at [1] and attached the patch which solves the issue as well..We'll fix it in next release.. 我在[1]处提出了一个jira并附加了可解决此问题的补丁。我们将在下一个版本中对其进行修复。
[1] https://wso2.org/jira/browse/CEP-865 [1] https://wso2.org/jira/browse/CEP-865
Thanks.. 谢谢..
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