Maven modify dependency jar manifest files - maven

Question

I'm sorry in advance I can't give the exact code as I don't have it at hand right now. However, I ran into a problem while trying to package my project into a jar. I used maven assembly plugin in my pom.xml to assemble all dependencies and project jar into one place. But now I need all of those dependency jars to have a custom manifest file. Is it possible to inject some properties with Maven itself somehow? Now the only solution I came up with is to use Maven's shade plugin and create an uber-jar, but the problem is that some of dependencies have custom manifests (like Spring framework ones) which gets lost and only one manifest is generated for the uber-jar. Is it possible to somehow tell maven to unpack dependencies, edit manifestEntries and pack them up again and assemble together with the project jar in a zip?
Long story short: basically what I want to find out, is would it be possibly to somehow modify a file inside one of the dependencies jar or in all dependency jars at once? Let's say my project has a dependency of spring-beans. Now I would like to modify a specific file inside spring-beans.jar, specifically manifest.md before I assemble them in one zip which should contain project.jar and spring-beans.jar (with a modified manifest.md). I think something similar is achievable with maven antrunner plugin?
Example:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.mycompany.app</groupId>
<artifactId>project</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>Project</name>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.4</version>
<configuration>
<descriptors>
<descriptor>src/main/assembly/src.xml</descriptor>
</descriptors>
</configuration>
</plugin>
</plugins>
</build>
</project>
I want to modify manifest.md in spring-core.jar, spring-context.jar and spring-beans.jar. I know I can use shade plugin to make an uber jar which would have one manifest.md which I could edit within shade's configuration, but if it is possible to somehow modify specific dependency jars alone I think it would be more fool proof and I could use these libraries among several applets.