[JELLY-163] Allow Expressions to throw exceptions

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.1-beta-1
• Component/s: core / taglib.core
• Assignee: Unassigned
• Reporter: Hans Gilde
• Created: 15/Nov/04 01:32
• Updated: 06/Sep/09 05:18

Description

Per a recent email from Paul Libbrecht, we should allow expressions to throw an exception. Currently, the Expression interface doesn't throw exceptions.

Issues:

• currently, the script evaluation isn't terminated because of an expression exception. should it be? by default, I mean. could this be another flag in the environment?
• should the tag itself be given a way to intercept exceptions from Expressions? Expressions are evaluated before the tag is run, so it normally wouldn't know anything about them.

Email from Paul Libbrecht [[e-mail]]:
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Hi,

One of the most frustrating place in jelly, to my taste, is when a jexl exception occurs... Jelly complains (at least with good logging
settings) but does not throw. Moreover, this complaint doesn't have a jelly line-number which makes it somewhat hard.

Is there really any wish that such an exception is not thrown ?

thanks

paul
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Issue Links

• is blocked by: JELLY-286 Various fixes for JIRA bugs