Using Abdera as dependency in JIRA plugins

[Fábio Antunes]

Hi,

Im getting a "java.lang.ClassCastException: org.apache.xerces.jaxp.DocumentBuilderFactoryImpl cannot be cast to javax.xml.parsers.DocumentBuilderFactory" when added org.apache.abdera as dependency to pom. I'have tried to follow the tips in this post adding: 

<dependency>
	<groupId>xml-apis</groupId>
	<artifactId>xml-apis</artifactId>
	<version>1.3.04</version>
	<scope>provided</scope>
</dependency>

and excluding it from abdera dependency:

<dependency>
	<groupId>org.apache.abdera</groupId>
	<artifactId>abdera-parser</artifactId>
	<version>1.1.3</version>
	<exclusions>
		<exclusion>
			<groupId>xml-apis</groupId>
			<artifactId>xml-apis</artifactId>
		</exclusion>
	</exclusions>
</dependency>

But then i get "java.lang.ClassNotFoundException: org.w3c.dom.Node

at org.apache.felix.framework.ModuleImpl.findClassOrResourceByDelegation(ModuleImpl.java:772)" and i can't understand why.

Someone with similar problem and possible solutions ?

Kind regards,
Fábio Antunes 

[Fábio Antunes · Accepted solution]

I found out the solution:

<dependency>
<groupId>org.apache.abdera</groupId>
<artifactId>abdera-parser</artifactId>
<version>1.1.3</version>
<exclusions>
<exclusion>
<groupId>xerces</groupId>
<artifactId>xercesImpl</artifactId>
</exclusion>
<exclusion>
<groupId>jaxen</groupId>
<artifactId>jaxen</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.abdera</groupId>
<artifactId>abdera-core</artifactId>
<version>1.1.3</version>
<exclusions>
<exclusion>
<groupId>xerces</groupId>
<artifactId>xercesImpl</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.abdera</groupId>
<artifactId>abdera-i18n</artifactId>
<version>1.1.3</version>
<exclusions>
<exclusion>
<groupId>xerces</groupId>
<artifactId>xercesImpl</artifactId>
</exclusion>
</exclusions>
</dependency>

Regards

[Tormod Haugene]

An alternative to excluding the offending package would be to excplicitly import the one that we need. 

Error:

ClassCastException: org.apache.xerces.jaxp.SAXParserFactoryImpl cannot be cast to javax.xml.parsers.SAXParserFactory

The following worked for me:

// pom.xml, inside maven-jira-plugin (or maven-amps-plugin)

<Import-Package>
    javax.xml.parsers,         <<<<< Excplicitly import the one we want to use
    *;resolution:=optional
</Import-Package>