Package org.dspace.app.rest.security

Class WebSecurityExpressionEvaluator

java.lang.Object

org.dspace.app.rest.security.WebSecurityExpressionEvaluator

@Component
public class WebSecurityExpressionEvaluator
extends Object

This class will contain the logic to allow us to evaluate an expression given through a String. This will be used by the ConverterService for parsing the PreAuthorize annotations used on the findOne methods of RestRepositories. A String will be given to the evaluate method and that String will then be parsed and a boolean will be returned based on the condition in the String. For example: "hasPermission(#id, 'ITEM', 'READ')" is such a String This will be evaluated and if the current user has the permission to read an item with the given id, a true will be returned, if not it'll be false. This works on all the methods in SecurityExpressionRoot

Constructor Summary

Constructors

Constructor	Description
WebSecurityExpressionEvaluator(List<org.springframework.security.access.expression.SecurityExpressionHandler> securityExpressionHandlers)	Constructor for this class that sets all the SecurityExpressionHandler objects in a list

Method Summary

Modifier and Type	Method	Description
boolean	evaluate(String securityExpression, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, String id)	This method will have to be used to evaluate the String given.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

WebSecurityExpressionEvaluator

public WebSecurityExpressionEvaluator(List<org.springframework.security.access.expression.SecurityExpressionHandler> securityExpressionHandlers)

Constructor for this class that sets all the SecurityExpressionHandler objects in a list

Parameters:

securityExpressionHandlers - The SecurityExpressionHandler for this class

Method Details

evaluate

public boolean evaluate(String securityExpression,
 javax.servlet.http.HttpServletRequest request,
 javax.servlet.http.HttpServletResponse response,
 String id)

This method will have to be used to evaluate the String given. It'll parse the String and resolve it to a method in SecurityExpressionRoot and evaluate it to then return a boolean

Parameters:

securityExpression - The String that resembles the expression that has to be parsed

request - The current request

response - The current response

id - The id for the Object that is the subject of the permission

Returns:

A boolean indicating whether the currentUser adheres to the permissions in the securityExpression String or not