Null Pointer Exception on browseVolume when no existing volumes

[npeterson]

NPE on PLoS Biology because there are no existing volumes. Maybe we should trap nicely in browseVolume?

2009-06-08 11:36:37,175 ERROR UnhandledException?(PLoSBiology)> [http-8080-Processor14 org.topazproject.ambra.UnhandledException?] java.lang.NullPointerException?

at

org.topazproject.ambra.article.service.BrowseService?.getIssueInfo2(Brows eService.java:302)

at

org.topazproject.ambra.article.service.BrowseService?.access$500(BrowseSe? rvice.java:72)

at

org.topazproject.ambra.article.service.BrowseService?$4.lookup(BrowseServ? ice.java:288)

at

org.topazproject.ambra.article.service.BrowseService?$4.lookup(BrowseServ? ice.java:287)

at

org.topazproject.ambra.cache.EhcacheProvider?$1.execute(EhcacheProvider?.j ava:140)

at

org.topazproject.ambra.cache.Cache$SynchronizedLookup?.execute(Cache.java :231)

at

org.topazproject.ambra.cache.EhcacheProvider?.get(EhcacheProvider?.java:13 0) ... ...

[ssterling]

(In [7759])For the Browse Volume action, eliminated the null pointer exception when there is no volume.

It is not anticipated that this action will be accessed for any Journal which has no volumes and no issues so, in either of those cases, a relatively sparse page is displayed. The user no longer sees the Site Error page.

Also revamped the logic for default display of volume and/or issue for both the Browse Volume and Browse Issue actions.

Addresses # 1329