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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.

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