jarTransformer

Read and Transform the contents of jar file entry in the jar file.

License	The Apache License, Version 2.0
Categories	ORM Data
GroupId	cn.nikeo.jar-transformer
ArtifactId	jar-transformer
Last Version	1.0.0
Release Date	Oct 4, 2020
Type	pom.sha512
Description	jarTransformer Read and Transform the contents of jar file entry in the jar file.
Project URL	https://github.com/nikeorever/jarTransformer
Source Code Management	https://github.com/nikeorever/jarTransformer

Download jar-transformer

Filename	Size
jar-transformer-1.0.0.pom
jar-transformer-1.0.0-sources.jar	2 KB
jar-transformer-1.0.0-javadoc.jar	792 KB

Dependencies

compile (1)

Group / Artifact	Type	Version
org.jetbrains.kotlin : kotlin-stdlib-jdk8	jar	1.4.10

Project Modules

There are no modules declared in this project.

jarTransformer

Read and Transform the contents of jar file entry in the jar file.

Sample

 transformJar(File("input.jar"), File("output.jar")) { inputJarEntry, outputJarEntryInputStream ->
      when {
          inputJarEntry.isClassFile() -> {
              // handle class file
              val clazz = ClassPool().makeClass(outputJarEntryInputStream)
              // modify bytecode
              if (clazz.name == "androidx.activity.R") {
                  clazz.addField(CtField(CtClass.intType, "generated_int_field", clazz), "100")
              }
              clazz.toBytecode()
          }
          inputJarEntry.isDirectory -> {
              outputJarEntryInputStream.readBytes()
          }
          else -> {
              outputJarEntryInputStream.readBytes()
          }
      }
 }

Or Use DSL API:

 transformJarDsl(File("input.jar"), File("output.jar")) {
      handleClassEntry { outputJarEntryInputStream ->
          // handle class file
          val clazz = ClassPool().makeClass(outputJarEntryInputStream)
          // modify bytecode
          if (clazz.name == "androidx.activity.R") {
              clazz.addField(CtField(CtClass.intType, "generated_int_field", clazz), "100")
          }
          clazz.toBytecode()
      }
 }

Download

Gradle Kotlin Script

repositories {
    mavenCentral()
}

dependencies {
    implementation("cn.nikeo.jar-transformer:jar-transformer:1.0.0")
}

Maven

<dependency>
  <groupId>cn.nikeo.jar-transformer</groupId>
  <artifactId>jar-transformer</artifactId>
  <version>1.0.0</version>
</dependency>

License

Apache License, Version 2.0, (LICENSE or https://www.apache.org/licenses/LICENSE-2.0)

Versions

Version
1.0.0 Oct 4, 2020