Relocating fastxml.jackson classes to my.package.fastxml.jackson - jackson

Question

I'm trying to relocate the packages from "com.fasterxml.jackson" into my own package (ie, "mypackage.com.fasterxml.jackson") and then consume it in another JAR which I own.
I've managed to run the maven-shade plugin to do it using this configuration:
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<shadedArtifactAttached>false</shadedArtifactAttached>
<createDependencyReducedPom>true</createDependencyReducedPom>
<relocations>
<relocation>
<pattern>com.fasterxml.jackson</pattern>
<shadedPattern>mypackage.com.fasterxml.jackson</shadedPattern>
</relocation>
</relocations>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
The problem that I'm facing is when I try to consume it, from some reason Eclipse keeps adding a dependency to the original jackson ("mypackage.com.fasterxml.jackson") and not the new one.
Just to be clear, my setup is:
- Jar X have a dependency in ThirdPartyArtifcats.
- ThirdPartyArtifcats references Jackson and run the maven-shade plugin, thus it contains a modified version of Jackson (mypackage.com.fasterxml.jackson).
When I try to use Jackson's ObjectMapper in Jar X, Eclipse keeps giving a reference to the original jackson.
I'll appreciate your help!

Answer 1

In the end I've used JarJar and created a modified JAR. Then I've added a dependency to my code and updated it manually so it now relates to the modified package instead of the original package.
Here's a procedure describing what I've done:
How to use JarJar in order to relocate classes of a JAR from one package to another
In this example we'll be changing the package from "com.fasterxml.jackson" to "io.kuku.dependencies.com.fasterxml.jackson".
- The source JAR is called "jackson-databind-2.6.4.jar" and new modified (target) JAR is called "kuku-jackson-databind-2.6.4.jar".
- The "jarjar" JAR file is in version 1.4
Create a "rules.txt" file. The contents of the file should be (watch the period before the '#' character):
rule com.fasterxml.jackson.** io.kuku.dependencies.com.fasterxml.jackson.#1
Run the following command:
java -jar jarjar-1.4.jar process rules.txt jackson-databind-2.6.4.jar kuku-jackson-databind-2.6.4.jar
Installing the modified JARs to the local repository
In this case I'm installing 3 files located on "c:\my-jars\" folder.
mvn install:install-file -Dfile=C:\my-jars\kuku-jackson-annotations-2.6.4.jar -DgroupId=io.kuku.dependencies -DartifactId=kuku-jackson-annotations -Dversion=2.6.4 -Dpackaging=jar
mvn install:install-file -Dfile=C:\my-jars\kuku-jackson-core-2.6.4.jar -DgroupId=io.kuku.dependencies -DartifactId=kuku-jackson-core -Dversion=2.6.4 -Dpackaging=jar
mvn install:install-file -Dfile=C:\my-jars\kuku-jackson-databind-2.6.4.jar -DgroupId=io.kuku.dependencies -DartifactId=kuku-jackson-annotations -Dversion=2.6.4 -Dpackaging=jar
Using the modified JARs in the project's pom
In this example, this is the "dependencies" element in the projects pom:
<dependencies>
<!-- ================================================== -->
<!-- kuku JARs -->
<!-- ================================================== -->
<dependency>
<groupId>io.kuku.dependencies</groupId>
<artifactId>kuku-jackson-annotations</artifactId>
<version>2.6.4</version>
</dependency>
<dependency>
<groupId>io.kuku.dependencies</groupId>
<artifactId>kuku-jackson-core</artifactId>
<version>2.6.4</version>
</dependency>
<dependency>
<groupId>io.kuku.dependencies</groupId>
<artifactId>kuku-jackson-databind</artifactId>
<version>2.6.4</version>
</dependency>