DBFlute Runtime: improve exception messages for uniqueBy()

[jflute]

from Slack: https://dbflute.slack.com/archives/CAPH91CH2/p1658488810025909

[jflute]

like this:

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
The primary-key value in the entity was not found.

[Advice]
An entity should have its primary-key value
when e.g. insert(), update().
For example:
  (x):
    Member entity = new Member();
    entity.setFooName(...);
    entity.setFooDate(...);
    MemberBhv.updateNonstrict(entity);
  (o):
    Member entity = new Member();
    entity.setFooId(...); // *Point
    entity.setFooName(...);
    entity.setFooDate(...);
    MemberBhv.updateNonstrict(entity);

Or if your process is insert(), you might expect identity.
Confirm the primary-key's identity setting.

Or if you update it by unique column (not PK),
use entity.uniqueBy(...).
For example:
  (o):
    Member entity = new Member();
    entity.uniqueBy(...); // *Point
    entity.setFooDate(...);
    MemberBhv.updateNonstrict(entity);

[Entity]
Member:{null, sea, mystic, null, null, null, null, null, null, null, null}@875580a9
* * * * * * * * * */

[jflute]

switch by UQ existence:

br.addElement("");
br.addElement("Or if your process is insert(), you might expect identity.");
br.addElement("Confirm the primary-key's identity setting.");
if (!entity.asDBMeta().getUniqueInfoList().isEmpty()) {
    br.addElement("");
    br.addElement("Or if you update it by unique column (not PK),");
    br.addElement("use entity.uniqueBy(...).");
    br.addElement("For example:");
    br.addElement("  (o):");
    br.addElement("    " + classTitle + " entity = new " + classTitle + "();");
    br.addElement("    entity.uniqueBy(...); // *Point");
    br.addElement("    entity.setFooDate(...);");
    br.addElement("    " + behaviorName + ".updateNonstrict(entity);");
}
setupEntityElement(br, entity);
final String msg = br.buildExceptionMessage();
throw new EntityPrimaryKeyNotFoundException(msg);