[seam-issues] [JBoss JIRA] Commented: (SEAMFACES-208) Support for resolving no argument methods in an EL value expression

Support for resolving no argument methods in an EL value expression ------------------------------------------------------------------- Key: SEAMFACES-208 URL: https://issues.jboss.org/browse/SEAMFACES-208 Project: Seam Faces Issue Type: Feature Request Components: CDI Integration Affects Versions: 3.1.0.Beta2 Reporter: Dan Allen Fix For: 3.1.0.Final The EL specification added support for resolving parameterized methods in value and method expressions, with one exception. It does not support resolving methods with 0 parameters. The reason is that an () used at the end of a property is not acknowledged. As a result, the resolver attempts to resolve the method name as a bean property. For example, assume we have the method: {code} public Integer count() { return 1; } {code} If we attempt to resolve this in a value expression using: {code} #{bean.count()} {code} We can an error message "count property not found on bean" It works as expected if the method has at least one parameter: {code} public Integer count(Integer i) { return i; } {code} The following expression will resolve to a value of 1. {code} #{bean.count(1)} {code} This also breaks resolving the size of a collection: {code} #{employees.size()} {code} In this case, the error is a bit strange because it tries to parse size as an index. The root cause of all this is that the spec does not properly honor 0 parameters as a valid number of parameters for a parameterized methods. Instead, it ignores the () and treats the expression as a property. Method expressions does not have this limitation since both .action and .action() are equivalent expressions.