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## weblogic.management.security.authorization
Interface RoleReaderMBean

All Known Subinterfaces:
  RoleEditorMBean

    public interface RoleReaderMBean

Provides a set of methods for reading policies. An Authorization-provider MBean can optionally extend this MBean. The WebLogic Server Administration Console detects when an Authorization provider extends this MBean and automatically provides a GUI for using these methods.

### Deprecation of MBeanHome and Type-Safe Interfaces

In addition to being used as a base class that provides functionality to security provider MBeans, JMX applications can use this class directly as a type-safe interface. When used as a type-safe interface, a JMX application imports this class and accesses it through `weblogic.management.MBeanHome`. As of 9.0, the `MBeanHome` interface and all type-safe interfaces for WebLogic Server MBeans are deprecated. Instead, JMX applications that interact with WebLogic Server MBeans should use standard JMX design patterns in which clients use the `javax.management.MBeanServerConnection` interface to discover MBeans, attributes, and attribute types at runtime. For more information, see "Developing Manageable Applications with JMX" on http://edocs.bea.com.

Method Summary
`String` | `getRoleExpression(String resourceId, String roleName)` Returns the expression that defines the role granting policy.
`String[]` | `listRolesForResource(String resourceId)` Lists the role names that are scoped by a resource.
`boolean` | `roleExists(String resourceId, String roleName)` Indicates whether a role exists.

Method Detail

### roleExists

    boolean roleExists(String resourceId,
                       String roleName)

  Indicates whether a role exists.

  Parameters:
    `resourceId` - - The resource that scopes the role. Each role has a scoping resource. A null indicates a global role.
    `roleName` - - The role for which this method searches.

### getRoleExpression

    String getRoleExpression(String resourceId,
                             String roleName)
                             throws NotFoundException

  Returns the expression that defines the role granting policy.

  Parameters:
    `resourceId` - - The resource that scopes the new role. Each resource has its predefined 'hierachy'. This new role is applicable to all of the given resouce's descendants if any. A null indicates a global role, no scoping resource, which applies to all resources within the container.
    `roleName` - - The role for which this method returns the role granding expression. A null value will trigger NullPointerException.
  Throws:
    `NotFoundException`

### listRolesForResource

    String[] listRolesForResource(String resourceId)

  Lists the role names that are scoped by a resource. Returns a null list if there are no roles under this resource scoping.

  Parameters:
    `resourceId` - - A resource identifier. A null value specifies a global role.

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