I am having a little trouble figuring out how to do and's on EL expressions in Facelets. So basically I have:
<h:outputText id="Prompt"
value="Fobar"
rendered="#{beanA.prompt == true && beanB.currentBase !=null}" />
But I keep getting:
Error Traced[line: 69] The entity name must immediately follow the '&' in the entity reference.
Facelets is a XML based view technology. The & is a special character in XML representing the start of an entity like & which ends with the ; character. You'd need to either escape it, which is ugly:
rendered="#{beanA.prompt == true && beanB.currentBase != null}"
or to use the and keyword instead, which is preferred as to readability and maintainability:
rendered="#{beanA.prompt == true and beanB.currentBase != null}"
Unrelated to the concrete problem, comparing booleans with booleans makes little sense when the expression expects a boolean outcome already. I'd get rid of == true:
rendered="#{beanA.prompt and beanB.currentBase != null}"
In addition to the answer of BalusC, use the following Java RegExp to replace && with and:
Search: (#\{[^\}]*)(&&)([^\}]*\})
Replace: $1and$3
You have run this regular expression replacement multiple times to find all occurences in case you are using >2 literals in your EL expressions. Mind to replace the leading # by $ if your EL expression syntax differs.
Source: Stackoverflow.com