IllegalArgumentException for DBSequence
In using JHeadstart 10.1.3 I have run into problems using the entity attribute type of DBSequence. On loading the page I get the following error
500 Internal Server Error
java.lang.IllegalArgumentException: 'value' is not of type java.lang.Number'
at oracle.adf.view.faces.convert.NumberConverter.getAsString(NumberConverter.java:270)I see that a few people have had the same problem and you were able to reproduce it
Re: JHS 10.1.3 DBSequence problems
As Frank Nimphus pointed out on the JDeveloper forum, the error is becuase the DBSequence type cannot be converted into a number. The JHeadstart generator however has included a <f:convertNumber> tag (presumably becuase the database type is NUMBER ?). By removing the <f:convertNumber> tag, the error no longer occurs.
I have solved this by creating custom velocity templates for tableTextInput and formTextInput templates removing the #NUMBER_CONVERTER() and overriding the template used at the individual item level for each item I have set as DBSequence.
If my solution is indeed the correct approach, is it possible to consider this as future enhancement ?
Please let me know if there is another way.
Cheers,
Brent
JHeadstart Team,
I am still receiving the error when I use DBSequence with the current version.
java.lang.IllegalArgumentException: 'value' is not of type java.lang.Number' at oracle.adf.view.faces.convert.NumberConverter.getAsString(NumberConverter.java:270) at oracle.adfinternal.view.faces.convert.NumberConverter.getAsString(NumberConverter.java:44)
Please confirm if the fix never made to the new release.
Thank you.
John.
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I'm puzzled by this, if not scared.
Every version of JDev till 11.1.1.2.0 has had out-of-the-box support for DBSequence as an entity attribute type.
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How do I copy a dbsequence key from one entity to another
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PassivateStateForUndo stores temporary DBSequence after db error ?
I'm noticing something strange with our DBSequence attributes, perhaps you could help us out here.
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==========
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Fred -
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} // end plusUse a debugger.
Or put in some debugging statements. -
hi All,
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Regards,
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Imported project from CVS not working.
Hi all,
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Parsing input stream into named value pairs
Hi everyone. I figured I would post this scenario, and hope to get some 'expert' opinions on what the best way to handle this would be.
I have an input stream being returned to me and I need to separate them into name/value pairs. I receive this as two lines of strings. The first line is the variable names, and the second line is the values. This is the format:
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I need to separate this out into:
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2. Be able to retrieve each value by calling the appropriate variable name.
Any advice/opinion on this is greatly appreciated!!! Thanks!You could choose to feed the String through an InputStream and use a StreamTokenizer, which is substantially more powerful than StringTokenizer. I would personally, however, choose to parse it myself, as antequated as that might seem. ;)
Presume that s1 is equal to
"Var1", "Var2", "MoreVars", "EvenMoreVars" , "LastVar"
And that s2 is equal to
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if (i < ch.length)
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Any questions?
Oh, BTW, that was all blue 'cause the code tag doesn't take well to '"'. -
I have been struggling with the methodology of using assertions for some time
now and would like to have an objective viewpoint. It primarily has to
do with the use of assertions for pre-conditions.
Let's say we have some class, for demonstration purpose only, as this one:
public class MyClass {
private final String str;
public MyClass(String str)
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return x.length() + y.length();
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Anyway the Sun Java documentation says the following:
http://java.sun.com/j2se/1.4.2/docs/guide/lang/assert.html#preconditions
"Do not use assertions to check the parameters of a public method."
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however, such as the getLength method.
I always try to keep my classes relatively small. So often I feel no desire
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So in this case why add assertions in getLength if I can already clearly
see that the parameters have been checked in the MyClass constructor and
the getTotalLength method?
Maybe I am wrong, but I am afraid that using such rigurous parameter testing
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remove these normal checks, because that would mean it could trigger
an assertion in one of the private methods, and I could as well move
the assertions from the private to the public methods.
What I don't feel comfortable about is this big distinction between
assertions and run-time exceptions. Why not use assertions in
public methods for parameter testing? They are just exceptions
too anyway. And they have the benefit of not impacting performance
for production environments.
There is an article about challenging the Sun Assert convention here.
http://www.javaworld.com/javaworld/jw-12-2001/jw-1214-assert-p2.html
I would like you to read it and give your objective opinion. Weighing
the positive and negative implications of it and tell me what you
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assertions are to be used to validate the state of
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They are not
exceptions, by the way. Failure will result in an
AssertionError.Yes, I should have said errors or throwables.
It's quite overkill IMO to use those for the
validation of parameters provided by someone else.Why? Isn't it overkill to impact the performance by
using run-time exceptions instead of assertions?
If
your API declares the legit value range of an
argument, a NullPointerException for null and an
IllegalArgumentException for values outside bounds,
that gives me more flexibility to react and handle
error states (it could be user input - null would
mean there's a bug, out of bounds would mean I have
to ask the user again) than merely firing of a "big"
assertion error.But the whole idea of pre-conditions is that the method never must be called with invalid values. Your example might make sense for some class close to the front-end, but most classes are deep inside everything and have no idea what to do with a NullPointerException or IllegalArgumentException at that point. I would let a facade near the front-end deal with invalid user input and explicitly prevent the invalid input progress deeper inside my code.
The article I linked goed deeper in about why it is a good idea to give a "big" assertion error at that point.
There's probably no hard or objective rule when you
should use what anyway, otherwise, there wouldn't be
different opinions in this matter. If you're looking
for one, you'll most likely not find it.I have certain ideas about assertions and I would like to know if these ideas are reasonable. Especially because they go against the Sun convention and I usually am a follower of standards. -
Appending namespaces attributes
Hi there,
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I am currently working on transforming xml payload from proxy service (pswsdl) to the xml as compliant with business service (bswsdl).
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I need to pass Person object to the business service (bswsdl) which points to a live web service deployed.
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<Person xsi:type="imy:com_sample_app_model_PersonInput" xmlns:imy="http://com.sample.app.facade/IMyWebService1.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
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I tried manually adding the type in the xml elements like this (Details xsi:type="imy:com_sample_app_model_DetailsInput") but still the same error.
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OSB Service Callout action received SOAP Fault response
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Let me know your thoughts.
Thanks, -
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I'm new to Java and I have a question regarding super(). I'm implementing a design where we have a custom exception which extends Exception. The design calls for null messages to lead to throwing an IllegalArgumentException, but Exception's constructor does not throw an IllegalArgumentException for a null message.
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