Usage of whitespace in @Path regular expressions raises service deployment 
errors
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                 Key: CXF-3168
                 URL: https://issues.apache.org/jira/browse/CXF-3168
             Project: CXF
          Issue Type: Bug
          Components: JAX-RS
    Affects Versions: 2.3.0
            Reporter: Glen Mazza
            Priority: Minor
             Fix For: 2.3.1


See: http://www.corneliadavis.com/blog/index.php/tag/rest-cxf-regex/

The following regular expression works fine (for an elephant maintenance system 
at a zoo):

@Path("/{id:\\d+}")
public Person getElephantSubresource(@PathParam("id") int id);

However, placing spaces around the colon delimiter as follows:
@Path("/{id : \\d+}")
public Person getElephantSubresource(@PathParam("id") int id);

... causes these exceptions to occur at service deployment time:
org.springframework.beans.PropertyBatchUpdateException; nested 
PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: 
Property 'serviceBeans' threw exception; nested exception is 
java.util.regex.PatternSyntaxException: Illegal repetition near index 0
/{id : \d+}(/.*)?
^
        at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1361)
        at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1086)
        at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
        at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
        at 
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
        at 
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:22

....

        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: java.util.regex.PatternSyntaxException: Illegal repetition near 
index 0
/{id : \d+}(/.*)?
^
        at java.util.regex.Pattern.error(Pattern.java:1713)
        at java.util.regex.Pattern.closure(Pattern.java:2775)
        at java.util.regex.Pattern.sequence(Pattern.java:1889)
        at java.util.regex.Pattern.expr(Pattern.java:1752)
        at java.util.regex.Pattern.compile(Pattern.java:1460)
        at java.util.regex.Pattern.<init>(Pattern.java:1133)
        at java.util.regex.Pattern.compile(Pattern.java:823)
        at org.apache.cxf.jaxrs.model.URITemplate.<init>(URITemplate.java:89)
        at 
org.apache.cxf.jaxrs.model.URITemplate.createTemplate(URITemplate.java:302)
        at 
org.apache.cxf.jaxrs.model.URITemplate.createTemplate(URITemplate.java:289)
        at 
org.apache.cxf.jaxrs.utils.ResourceUtils.createOperationInfo(ResourceUtils.java:328)
        at 
org.apache.cxf.jaxrs.utils.ResourceUtils.evaluateResourceClass(ResourceUtils.java:204)

The version with spaces is as shown on page 47 of Bill Burke's RESTFul Java 
with JAX-RS book (O'Reilly).


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