JaVers dependency on Google Guava

As documented I just ran the below code to view the diff. It seems that Google Guava is required as a runtime dependency for the below code to work.

Javers javers = JaversBuilder.javers().build();
Person tommyOld = new Person("tommy", "Tommy Smart");
Person tommyNew = new Person("tommy", "Tommy C. Smart");

Diff diff = javers.compare(tommyOld, tommyNew);
System.out.println(diff.prettyPrint());

The code above throws an exception as shown below:

Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/collect/ImmutableMap
	at org.javers.core.Changes.<init>(Changes.java:35)
	at org.javers.core.diff.Diff.groupByObject(Diff.java:88)
	at org.javers.core.diff.Diff.toString(Diff.java:129)
	at org.javers.core.diff.Diff.prettyPrint(Diff.java:120)
	...
Caused by: java.lang.ClassNotFoundException: com.google.common.collect.ImmutableMap
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 5 more

Not sure how the below line of code is used in org.javers.core.Changes.java There are 3 more references in other classes HibernateConfig.java, JaversSpringJpaApplicationConfig.java and JaversSpringMongoApplicationConfig.java

The above code can be easily replaced with standard Java code to remove dependency on Goolge Guava.

Do let me know if these changes can be done. I will submit a PR.

[shirishpandharikar]

@PodusovMaxim Thanks for reporting this. This is something that got added after #692 was reported and fixed. Will submit a PR.

[bartoszwalacik]

fixed in 5.10.3