I had a habit of always adding a null check at the start of a method, for validating method arguments. However, I gradually learnt this might not always be a good idea. Checking for nulls when your code does not expect a null value would just hide the problem happening upstream. Also, since the error would manifest in some other part of the code, it will be a nightmare the debug what actually failed. Instead, if you let the code throw an NPE, your application will fail fast and report exactly where the exception was thrown. So, unless your code expects nullable values, its not a good idea to add null checks. More discussion on this - https://softwareengineering.stackexchange.com/questions/147480/should-one-check-for-null-if-he-does-not-expect-null
Identity Terms and Definitions SAML Profiles http://saml.xml.org/components-profiles gives the best definition of identity protocol profiles in general, Generally, a profile of SAML defines constraints and/or extensions in support of the usage of SAML for a particular application – the goal being to enhance interoperability by removing some of the flexibility inevitable in a general-use standard. For instance, the Web Browser SSO Profile specifies how SAML authentication assertions are communicated between an identity provider and service provider to enable single sign-on for a browser user.
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