CODEWITHSUNDEEP
javaxpath
Adam Lerman
Adam Lerman

Reputation: 3399

XPath can't find an engine

I inherited some code that is using XPath for which I am a novice. I have it now so that it loads the document, but when the document.selectPath(queryPath) it always fails with the following error: 

java.lang.RuntimeException:  Trying XBeans path engine... Trying XQRL... Trying delegated path engine... FAILED on //
        at org.apache.xmlbeans.impl.store.Path.getCompiledPath(Path.java:173)
        at org.apache.xmlbeans.impl.store.Path.getCompiledPath(Path.java:130)
        at org.apache.xmlbeans.impl.store.Cursor._selectPath(Cursor.java:902)
        at org.apache.xmlbeans.impl.store.Cursor.selectPath(Cursor.java:2634)
        at org.apache.xmlbeans.impl.values.XmlObjectBase.selectPath(XmlObjectBase.java:462)
        at org.apache.xmlbeans.impl.values.XmlObjectBase.selectPath(XmlObjectBase.java:446)

Upvotes: 2

Views: 7760

Answers (4)

Aleksey Arzhakov
Aleksey Arzhakov

Reputation: 11

worked for me:

    <dependency>
        <groupId>org.apache.xmlbeans</groupId>
        <artifactId>xmlbeans</artifactId>
        <version>4.0.0</version>
    </dependency>
  
    <dependency>
        <groupId>net.sf.saxon</groupId>
        <artifactId>Saxon-HE</artifactId>
        <version>10.6</version>
    </dependency>
    
    <dependency>
        <groupId>org.dom4j</groupId>
        <artifactId>dom4j</artifactId>
        <version>2.1.3</version>
    </dependency>

Upvotes: 1

user3861579
user3861579

Reputation: 21

The movement if you have [] in your xpath, it is searching for the external xpath enginer.. you have to download saxonb9-0-0-4j & xmlbeans-xpath-2.4.0.jar and add to the classpath

Upvotes: 2

user368326
user368326

Reputation: 31

Thank you jor for the post. I was confused as earlier commands to xml beans were successful.

Without saxon, this still works:

MapDocument doc;
...
String cityQuery = "$this//City";
XmlObject[] cities = doc.selectPath(cityQuery);

However saxon is required for explicit selection of fields within tags:

String aveQuery= "$this//Street[Kind='Avenue']";
XmlObject[] avenues = doc.selectPath(aveQuery); // RuntimeException without saxon on path

 

java.lang.RuntimeException:
Trying XBeans path engine... Trying XQRL... Trying delegated path engine... FAILED on $this//Street[Kind='Avenue']

I hope this might be of use to others that encounter a similar issue.

Upvotes: 3

jor
jor

Reputation: 711

You need an XPath engine in your classpath, which one bepends on the XMLBeans version, see http://wiki.apache.org/xmlbeans/XmlBeansFaq#whatJars

Upvotes: 2

Related Questions