It looks like http://jira.jboss.org/jira/browse/JBSEAM-580 has resurfaced.
I'm using Seam 1.2.1.GA and I get a String index out of bounds exception when I use the alternate syntax for referencing an entity property:
#{entity[fieldName]}Here is the stack trace:
18:57:39,147 ERROR [STDERR] java.lang.StringIndexOutOfBoundsException: String index out of range: -1
18:57:39,148 ERROR [STDERR] at org.jboss.seam.ui.ModelValidator.validate(ModelValidator.java:32)
18:57:39,148 ERROR [STDERR] at javax.faces.component._ComponentUtils.callValidators(_ComponentUtils.java:157)
18:57:39,148 ERROR [STDERR] at javax.faces.component.UIInput.validateValue(UIInput.java:312)
18:57:39,148 ERROR [STDERR] at javax.faces.component.UIInput.validate(UIInput.java:353)
...
Basically, the following method in Expressions.java throws because 'dot' is -1:
public InvalidValue[] validate(String propertyExpression, Object value)
{
int dot = propertyExpression.lastIndexOf('.');
int bracket = propertyExpression.lastIndexOf('[');
if (dot<=0 && bracket<=0)
{
return new InvalidValue[0];
}
String componentName;
String propertyName;
if (dot>bracket)
{
componentName = propertyExpression.substring(2, dot);
propertyName = propertyExpression.substring( dot+1, propertyExpression.length()-1 );
}
else
{
componentName = propertyExpression.substring(2, bracket);
propertyName = propertyExpression.substring( bracket+1, propertyExpression.length()-2 );
}
String modelExpression = propertyExpression.substring(0, dot) + '}';
Object modelInstance = createValueBinding(modelExpression).getValue(); //TODO: cache the ValueBinding object!
return getValidator(modelInstance, componentName).getPotentialInvalidValues(propertyName, value);
}
Does anyone know of a way to work around this? I'm trying to make a generic Facelets tag for input fields and I can't because it won't let me bind to a property using this syntax.
