How Can Maven Users Effectively Integrate Xerces in Their Projects?

Tackling the Challenges of Xerces Integration in Java/Maven

In the Java ecosystem, Xerces emerges as a ubiquitous XML parser, employed in countless libraries and frameworks. However, the absence of versioning on official Xerces JARs and the lack of Maven deployment have posed significant challenges for Maven users.

Addressing the conflicts arising from multiple Xerces versions deployed by different organizations requires astute conflict resolution within Maven's dependency management. The conflicting xml-apis dependencies, each published with different versions and groupIds, prevent Maven from recognizing them as the same artifact, leading to multiple inclusion in resolved dependencies.

Moreover, the presence of multiple Xerces versions in the JRE through the JAXP implementation and within servlet containers further complicates the situation. The decision of whether to exclude Xerces dependencies or rely on the version provided in JAXP or the servlet container requires careful consideration. Without control over Xerces version selection, unpredictable classloading behavior and potential classloader conflicts can arise.

To tackle these issues, a viable solution lies in enforcing fine-grained control over dependencies and implementing tiered classloading. However, this approach may prove challenging in large-scale environments with multiple team members involved. Another potential solution involves globally excluding all Xerces dependencies and compelling all frameworks and libraries to leverage the JAXP version.

A Promising Solution

In a positive turn of events, Xerces build scripts have been patched, enabling the upload of Xerces JARs to Maven Central. This development allows for the seamless integration of officially versioned Xerces dependencies into Maven projects.

By utilizing the updated dependency in Maven Central, users can resolve Xerces dependencies effectively, ensuring consistency across various platforms. This solution eliminates the confusion and uncertainties associated with Xerces version management, significantly simplifying the development process.

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