stariy95 opened a new pull request, #597:
URL: https://github.com/apache/cayenne/pull/597
This PR introduces `CayennePath` and `CayennePathSegment` classes (that
should be value objects, but that's still not a thing in Java).
It allows to make any path-related logic more transparent and precise.
There are some minor incompatibilities introduced. They are all just changes
of the return type in several methods from `String` to `CayennePath` (like
`ObjRelationship.getDbRelationshipPath()` method), so shouldn't be a big
problem.
Here are some examples of it's usage:
```java
// 1. concatenate paths
CayennePath key = parentPath == null
? path.dot(entity.getName())
: parentPath.dot(path).dot(entity.getName());
// 2. mark the last path segment as outer join
CayennePathSegment last = getPath().last();
CayennePath outerPath = getPath().parent()
.dot(last.withModifier(CayennePath.OUTER_MODIFIER))
// 3. get tail of the path
CayennePath pathRemainder = path.tail(1);
```
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