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## weblogic.management.security.authorization
Interface PolicyReaderMBean

All Known Subinterfaces:
  PolicyEditorMBean

    public interface PolicyReaderMBean

Provides a set of methods for reading data about 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` | `getPolicyExpression(String resourceId)` Returns the expression of an existing policy.
`boolean` | `policyExists(String resourceId)` Indicates whether a policy exists for a resource.

Method Detail

### policyExists

    boolean policyExists(String resourceId)

  Indicates whether a policy exists for a resource.

  Parameters:
    `resourceId` - - The resource within which this method searches for a policy. A null value will trigger NullPointerException.

### getPolicyExpression

    String getPolicyExpression(String resourceId)
                               throws NotFoundException

  Returns the expression of an existing policy.

  Parameters:
    `resourceId` - - The resource for which this method returns the policy expression. A null value will trigger NullPointerException.
  Throws:
    `NotFoundException`

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