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  1. Jackrabbit Content Repository
  2. JCR-3435

NPE on parsing XPath query with child axis and star name at beginning (regression from 1.6.x)

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    Description

      When adding the following to org.apache.jackrabbit.spi.commons.query.xpath.QueryFormatTest:

          public void testChildStarName() throws Exception {
        checkStatement("//element(*, foo)[child::*/@bar = 'bla']");
    }

      a NullPointerException is thrown while parsing:

      java.lang.NullPointerException
        at org.apache.jackrabbit.spi.commons.query.xpath.QueryFormat.visit(QueryFormat.java:351)
        at org.apache.jackrabbit.spi.commons.query.RelationQueryNode.accept(RelationQueryNode.java:115)
        at org.apache.jackrabbit.spi.commons.query.xpath.QueryFormat.visit(QueryFormat.java:317)
        at org.apache.jackrabbit.spi.commons.query.LocationStepQueryNode.accept(LocationStepQueryNode.java:166)
        at org.apache.jackrabbit.spi.commons.query.xpath.QueryFormat.visit(QueryFormat.java:260)
        at org.apache.jackrabbit.spi.commons.query.PathQueryNode.accept(PathQueryNode.java:74)
        at org.apache.jackrabbit.spi.commons.query.xpath.QueryFormat.visit(QueryFormat.java:115)
        at org.apache.jackrabbit.spi.commons.query.QueryRootNode.accept(QueryRootNode.java:115)
        at org.apache.jackrabbit.spi.commons.query.xpath.QueryFormat.<init>(QueryFormat.java:75)
        at org.apache.jackrabbit.spi.commons.query.xpath.QueryFormat.toString(QueryFormat.java:95)
        at org.apache.jackrabbit.spi.commons.query.xpath.QueryFormatTest.checkStatement(QueryFormatTest.java:80)
        at org.apache.jackrabbit.spi.commons.query.xpath.QueryFormatTest.testChildStarName(QueryFormatTest.java:71)

      This is a regression from Jackrabbit 1.6.5, where a similar test does run, i.e. parsing does not throw exception.

      The same NPE happens when "child::" is dropped, i.e. when the query looks like this:

      "//element(*, foo)[*/@bar = 'bla']"

      Attachments

        1. xpathqueryparser.patch
          3 kB
          Jörg von Frantzius

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            schans Bart van der Schans
            jfrantzius Jörg von Frantzius
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              Created:
              Updated:
              Resolved: