java - Spring expression cannot resolve type -

i have service method annotated @postauthorize

@postauthorize("haspermission(returnobject, new readuserpermission())") public optional<user> find(string email) {     // implementation } 

as method gets called, spring throws following exceptions:

caused by: org.springframework.expression.spel.spelevaluationexception: el1003e:(pos 28): problem occurred whilst attempting construct object of type 'readuserpermission' using arguments '()'     @ org.springframework.expression.spel.ast.constructorreference.findexecutorforconstructor(constructorreference.java:190) ~[spring-expression-4.0.0.release.jar:4.0.0.release]     @ org.springframework.expression.spel.ast.constructorreference.createnewinstance(constructorreference.java:151) ~[spring-expression-4.0.0.release.jar:4.0.0.release]     @ org.springframework.expression.spel.ast.constructorreference.getvalueinternal(constructorreference.java:94) ~[spring-expression-4.0.0.release.jar:4.0.0.release]     @ org.springframework.expression.spel.ast.methodreference.getarguments(methodreference.java:147) ~[spring-expression-4.0.0.release.jar:4.0.0.release]     @ org.springframework.expression.spel.ast.methodreference.getvalueinternal(methodreference.java:79) ~[spring-expression-4.0.0.release.jar:4.0.0.release]     @ org.springframework.expression.spel.ast.spelnodeimpl.gettypedvalue(spelnodeimpl.java:113) ~[spring-expression-4.0.0.release.jar:4.0.0.release]     @ org.springframework.expression.spel.standard.spelexpression.getvalue(spelexpression.java:105) ~[spring-expression-4.0.0.release.jar:4.0.0.release]     @ org.springframework.security.access.expression.expressionutils.evaluateasboolean(expressionutils.java:11) ~[spring-security-core-3.1.2.release.jar:3.1.2.release]     ... 86 common frames omitted caused by: org.springframework.expression.accessexception: failed resolve constructor     @ org.springframework.expression.spel.support.reflectiveconstructorresolver.resolve(reflectiveconstructorresolver.java:121) ~[spring-expression-4.0.0.release.jar:4.0.0.release]     @ org.springframework.expression.spel.ast.constructorreference.findexecutorforconstructor(constructorreference.java:181) ~[spring-expression-4.0.0.release.jar:4.0.0.release]     ... 93 common frames omitted caused by: org.springframework.expression.spel.spelevaluationexception: el1005e:(pos 0): type cannot found 'readuserpermission'     @ org.springframework.expression.spel.support.standardtypelocator.findtype(standardtypelocator.java:81) ~[spring-expression-4.0.0.release.jar:4.0.0.release]     @ org.springframework.expression.spel.support.reflectiveconstructorresolver.resolve(reflectiveconstructorresolver.java:61) ~[spring-expression-4.0.0.release.jar:4.0.0.release]     ... 94 common frames omitted 

readuserpermission looks this:

@component public class readuserpermission implements permission<user> {      @override     public boolean haspermission(user user, user target) {         // implementation     } } 

at first, neither class readuserpermission nor interface permission annotated @component. thought maybe springs needs annotation find type not matter if annotate interface or class or both. exception same.

i overlooked part of documentation:

constructors can invoked using new operator. fully qualified class name should used primitive type , string (where int, float, etc, can used)