Handle empty string pattern in NumberConverter
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Key: TRINIDAD-1963
URL: https://issues.apache.org/jira/browse/TRINIDAD-1963
Project: MyFaces Trinidad
Issue Type: Bug
Components: Components
Affects Versions: 2.0.0.3-core
Environment: environment independent
Reporter: Jing Wu
"pattern" attribute of convertNumber component is defined of type String, thus
if this attribute is bound to an EL expression, the value will be evaluated to
an empty string if no value is obtained from that expression. Example: (here
format property of Empno in bindings is not defined, thus null, the the whole
expression is evaluated to be an empty string because the type is String)
<af:inputText value="#{bindings.Empno.inputValue}"
label="#{bindings.Empno.hints.label}"
required="#{bindings.Empno.hints.mandatory}"
columns="#{bindings.Empno.hints.displayWidth}"
maximumLength="#{bindings.Empno.hints.precision}"
shortDesc="#{bindings.Empno.hints.tooltip}" id="it4">
<f:validator binding="#{bindings.Empno.validator}"/>
<af:attributeDragSource attribute="value"/>
<af:convertNumber groupingUsed="false"
pattern="#{bindings.Empno.format}"/>
</af:inputText>
Empty string of pattern causes all sorts of undesired behavior, we need to
override getPattern() method on NumberConverter so that empty string is treated
as null.
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