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## java.security.cert
Class PolicyQualifierInfo

    java.lang.Object
      java.security.cert.PolicyQualifierInfo

    public class PolicyQualifierInfo

extends Object

An immutable policy qualifier represented by the ASN.1 PolicyQualifierInfo structure.

The ASN.1 definition is as follows:

       PolicyQualifierInfo ::= SEQUENCE {
            policyQualifierId       PolicyQualifierId,
            qualifier               ANY DEFINED BY policyQualifierId }

A certificate policies extension, if present in an X.509 version 3 certificate, contains a sequence of one or more policy information terms, each of which consists of an object identifier (OID) and optional qualifiers. In an end-entity certificate, these policy information terms indicate the policy under which the certificate has been issued and the purposes for which the certificate may be used. In a CA certificate, these policy information terms limit the set of policies for certification paths which include this certificate.

A `Set` of `PolicyQualifierInfo` objects are returned by the `PolicyNode.getPolicyQualifiers` method. This allows applications with specific policy requirements to process and validate each policy qualifier. Applications that need to process policy qualifiers should explicitly set the `policyQualifiersRejected` flag to false (by calling the `PKIXParameters.setPolicyQualifiersRejected` method) before validating a certification path.

Note that the PKIX certification path validation algorithm specifies that any policy qualifier in a certificate policies extension that is marked critical must be processed and validated. Otherwise the certification path must be rejected. If the `policyQualifiersRejected` flag is set to false, it is up to the application to validate all policy qualifiers in this manner in order to be PKIX compliant.

Concurrent Access

All `PolicyQualifierInfo` objects must be immutable and thread-safe. That is, multiple threads may concurrently invoke the methods defined in this class on a single `PolicyQualifierInfo` object (or more than one) with no ill effects. Requiring `PolicyQualifierInfo` objects to be immutable and thread-safe allows them to be passed around to various pieces of code without worrying about coordinating access.

Since:
  1.4

Constructor Summary
`PolicyQualifierInfo(byte[] encoded)` Creates an instance of `PolicyQualifierInfo` from the encoded bytes.

Method Summary
`byte[]` | `getEncoded()` Returns the ASN.1 DER encoded form of this `PolicyQualifierInfo`.
`byte[]` | `getPolicyQualifier()` Returns the ASN.1 DER encoded form of the `qualifier` field of this `PolicyQualifierInfo`.
`String` | `getPolicyQualifierId()` Returns the `policyQualifierId` field of this `PolicyQualifierInfo`.
`String` | `toString()` Return a printable representation of this `PolicyQualifierInfo`.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### PolicyQualifierInfo

    public PolicyQualifierInfo(byte[] encoded)
                        throws IOException

  Creates an instance of `PolicyQualifierInfo` from the encoded bytes. The encoded byte array is copied on construction.

  Parameters:
    `encoded` - a byte array containing the qualifier in DER encoding
  Throws:
    `IOException` - thrown if the byte array does not represent a valid and parsable policy qualifier

Method Detail

### getPolicyQualifierId

    public final String getPolicyQualifierId()

  Returns the `policyQualifierId` field of this `PolicyQualifierInfo`. The `policyQualifierId` is an Object Identifier (OID) represented by a set of nonnegative integers separated by periods.

  Returns:
    the OID (never `null`)

### getEncoded

    public final byte[] getEncoded()

  Returns the ASN.1 DER encoded form of this `PolicyQualifierInfo`.

  Returns:
    the ASN.1 DER encoded bytes (never `null`). Note that a copy is returned, so the data is cloned each time this method is called.

### getPolicyQualifier

    public final byte[] getPolicyQualifier()

  Returns the ASN.1 DER encoded form of the `qualifier` field of this `PolicyQualifierInfo`.

  Returns:
    the ASN.1 DER encoded bytes of the `qualifier` field. Note that a copy is returned, so the data is cloned each time this method is called.

### toString

    public String toString()

  Return a printable representation of this `PolicyQualifierInfo`.

  Overrides:
    `toString` in class `Object`
  Returns:
    a `String` describing the contents of this `PolicyQualifierInfo`

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For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2009 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.