Github user vruusmann commented on the pull request:
https://github.com/apache/spark/pull/3062#issuecomment-95080549
@selvinsource @mengxr I created an small project
https://github.com/vruusmann/jpmml-test in order to demonstrate how it's
possible to reduce the number of dependencies.
The idea is that you should keep JAXB dependencies (scope: `compile`) when
building for Java 1.6, but you can safely exclude them (scope: `provided`)
when building for Java 1.7 or newer.
Here's the output of `mvn dependency:tree` command for Java 1.6 (the size
of the resulting uber-JAR file is 1.8 MB):
```
[INFO] org.jpmml:pmml-test:jar:1.0-SNAPSHOT
[INFO] +- org.jpmml:pmml-model:jar:1.1.15:compile
[INFO] | +- org.jpmml:pmml-agent:jar:1.1.15:compile
[INFO] | \- org.jpmml:pmml-schema:jar:1.1.15:compile
[INFO] \- com.sun.xml.bind:jaxb-impl:jar:2.2.7:compile
[INFO] \- com.sun.xml.bind:jaxb-core:jar:2.2.7:compile
[INFO] \- javax.xml.bind:jaxb-api:jar:2.2.7:compile
```
Here's the same for Java 1.7 (the size of the uber-JAR file has shrunk by
1.2 MB to 0.6 MB; all the remaining dependencies `pmml-model`, `pmml-schema`
and `pmml-agent` are covered by the BSD 3-Clause License):
```
[INFO] org.jpmml:pmml-test:jar:1.0-SNAPSHOT
[INFO] +- org.jpmml:pmml-model:jar:1.1.15:compile
[INFO] | +- org.jpmml:pmml-agent:jar:1.1.15:compile
[INFO] | \- org.jpmml:pmml-schema:jar:1.1.15:compile
[INFO] \- com.sun.xml.bind:jaxb-impl:jar:2.2.7:provided
[INFO] +- com.sun.xml.bind:jaxb-core:jar:2.2.7:provided
[INFO] | +- javax.xml.bind:jaxb-api:jar:2.2.7:provided
[INFO] | \- com.sun.istack:istack-commons-runtime:jar:2.16:provided
[INFO] \- com.sun.xml.fastinfoset:FastInfoset:jar:1.2.12:provided
[INFO] \- javax.xml.bind:jsr173_api:jar:1.0:provided
```
JAXB dependencies were made part of Java runtime sometimes in the middle of
Java 1.6 (for example, 1.6_u01 does not have them, whereas 1.6_u45 does). So,
it's probably possible to fine-tune the activation of the Maven build profile
some more.
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