PolicyQualifierInfo (Certification Path APIs)

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

```
public class PolicyQualifierInfo
extends java.lang.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

Constructors
Constructor and Description

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

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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`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`.
`java.lang.String`	`getPolicyQualifierId()` Returns the policyQualifier Object Identifier as a String.
`java.lang.String`	`toString()` Return a printable representation of the `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 java.io.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:
    
    java.io.IOException - thrown if the byte array does not represent a valid and parsable policy qualifier
- Method Detail
  - 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.
  - getPolicyQualifierId
```
public final java.lang.String getPolicyQualifierId()
```
    Returns the policyQualifier Object Identifier as a String.
    
    Returns:
    
    the OID (never null)
  - 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 java.lang.String toString()
```
    Return a printable representation of the PolicyQualifierInfo.
    
    Overrides:
    
    toString in class java.lang.Object
    
    Returns:
    
    a String describing the contents of the PolicyQualifierInfo

Methods inherited from class java.lang.Object

PolicyQualifierInfo

getEncoded

getPolicyQualifierId

getPolicyQualifier

toString