# Class TrustManagerFactory

java.lang.Object
javax.net.ssl.TrustManagerFactory

public class TrustManagerFactory extends Object
This class acts as a factory for trust managers based on a source of trust material. Each trust manager manages a specific type of trust material for use by secure sockets. The trust material is based on a KeyStore and/or provider-specific sources.

Every implementation of the Java platform is required to support the following standard `TrustManagerFactory` algorithm:

- `PKIX`

This algorithm is described in the TrustManagerFactory section of the Java Security Standard Algorithm Names Specification. Consult the release documentation for your implementation to see if any other algorithms are supported.

Since:
  1.4
External Specifications
  - Java Security Standard Algorithm Names
See Also:
  - `TrustManager`

- ## Constructor Summary

  Constructors
  Modifier
  Constructor
  Description
  `protected`
  `TrustManagerFactory(TrustManagerFactorySpi factorySpi, Provider provider, String algorithm)`
  Creates a TrustManagerFactory object.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `final String`
  `getAlgorithm()`
  Returns the algorithm name of this `TrustManagerFactory` object.
  `static final String`
  `getDefaultAlgorithm()`
  Obtains the default TrustManagerFactory algorithm name.
  `static final TrustManagerFactory`
  `getInstance(String algorithm)`
  Returns a `TrustManagerFactory` object that acts as a factory for trust managers.
  `static final TrustManagerFactory`
  `getInstance(String algorithm, String provider)`
  Returns a `TrustManagerFactory` object that acts as a factory for trust managers.
  `static final TrustManagerFactory`
  `getInstance(String algorithm, Provider provider)`
  Returns a `TrustManagerFactory` object that acts as a factory for trust managers.
  `final Provider`
  `getProvider()`
  Returns the provider of this `TrustManagerFactory` object.
  `final TrustManager[]`
  `getTrustManagers()`
  Returns one trust manager for each type of trust material.
  `final void`
  `init(KeyStore ks)`
  Initializes this factory with a source of certificate authorities and related trust material.
  `final void`
  `init(ManagerFactoryParameters spec)`
  Initializes this factory with a source of provider-specific trust material.

  ### Methods declared in class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Constructor Details

  - ### TrustManagerFactory

    protected TrustManagerFactory(TrustManagerFactorySpi factorySpi, Provider provider, String algorithm)
    Creates a TrustManagerFactory object.
    Parameters:
      `factorySpi` - the delegate
      `provider` - the provider
      `algorithm` - the algorithm

- ## Method Details

  - ### getDefaultAlgorithm

    public static final String getDefaultAlgorithm()
    Obtains the default TrustManagerFactory algorithm name.

    The default TrustManager can be changed at runtime by setting the value of the `ssl.TrustManagerFactory.algorithm` security property to the desired algorithm name.

    Returns:
      the default algorithm name as specified by the `ssl.TrustManagerFactory.algorithm` security property, or an implementation-specific default if no such property exists.
    See Also:
      - security properties

  - ### getAlgorithm

    public final String getAlgorithm()
    Returns the algorithm name of this `TrustManagerFactory` object.

    This is the same name that was specified in one of the `getInstance` calls that created this `TrustManagerFactory` object.

    Returns:
      the algorithm name of this `TrustManagerFactory` object

  - ### getInstance

    public static final TrustManagerFactory getInstance(String algorithm) throws NoSuchAlgorithmException
    Returns a `TrustManagerFactory` object that acts as a factory for trust managers.

    This method traverses the list of registered security Providers, starting with the most preferred Provider. A new TrustManagerFactory object encapsulating the TrustManagerFactorySpi implementation from the first Provider that supports the specified algorithm is returned.

    Note that the list of registered providers may be retrieved via the `Security.getProviders()` method.

    Implementation Note:
      The JDK Reference Implementation additionally uses the `jdk.security.provider.preferred` `Security` property to determine the preferred provider order for the specified algorithm. This may be different from the order of providers returned by `Security.getProviders()`.
    Parameters:
      `algorithm` - the standard name of the requested trust management algorithm. See the TrustManagerFactory section in the Java Security Standard Algorithm Names Specification for information about standard algorithm names.
    Returns:
      the new `TrustManagerFactory` object
    Throws:
      `NoSuchAlgorithmException` - if no `Provider` supports a `TrustManagerFactorySpi` implementation for the specified algorithm
      `NullPointerException` - if `algorithm` is `null`
    External Specifications
      - Java Security Standard Algorithm Names
    See Also:
      - `Provider`

  - ### getInstance

    public static final TrustManagerFactory getInstance(String algorithm, String provider) throws NoSuchAlgorithmException, NoSuchProviderException
    Returns a `TrustManagerFactory` object that acts as a factory for trust managers.

    A new KeyManagerFactory object encapsulating the KeyManagerFactorySpi implementation from the specified provider is returned. The specified provider must be registered in the security provider list.

    Note that the list of registered providers may be retrieved via the `Security.getProviders()` method.

    Parameters:
      `algorithm` - the standard name of the requested trust management algorithm. See the TrustManagerFactory section in the Java Security Standard Algorithm Names Specification for information about standard algorithm names.
      `provider` - the name of the provider.
    Returns:
      the new `TrustManagerFactory` object
    Throws:
      `IllegalArgumentException` - if the provider name is `null` or empty
      `NoSuchAlgorithmException` - if a `TrustManagerFactorySpi` implementation for the specified algorithm is not available from the specified provider
      `NoSuchProviderException` - if the specified provider is not registered in the security provider list
      `NullPointerException` - if `algorithm` is `null`
    External Specifications
      - Java Security Standard Algorithm Names
    See Also:
      - `Provider`

  - ### getInstance

    public static final TrustManagerFactory getInstance(String algorithm, Provider provider) throws NoSuchAlgorithmException
    Returns a `TrustManagerFactory` object that acts as a factory for trust managers.

    A new TrustManagerFactory object encapsulating the TrustManagerFactorySpi implementation from the specified Provider object is returned. Note that the specified Provider object does not have to be registered in the provider list.

    Parameters:
      `algorithm` - the standard name of the requested trust management algorithm. See the TrustManagerFactory section in the Java Security Standard Algorithm Names Specification for information about standard algorithm names.
      `provider` - an instance of the provider.
    Returns:
      the new `TrustManagerFactory` object
    Throws:
      `IllegalArgumentException` - if the provider is `null`
      `NoSuchAlgorithmException` - if a `TrustManagerFactorySpi` implementation for the specified algorithm is not available from the specified `Provider` object
      `NullPointerException` - if `algorithm` is `null`
    External Specifications
      - Java Security Standard Algorithm Names
    See Also:
      - `Provider`

  - ### getProvider

    public final Provider getProvider()
    Returns the provider of this `TrustManagerFactory` object.
    Returns:
      the provider of this `TrustManagerFactory` object

  - ### init

    public final void init(KeyStore ks) throws KeyStoreException
    Initializes this factory with a source of certificate authorities and related trust material.

    The provider typically uses a KeyStore as a basis for making trust decisions.

    For more flexible initialization, please see `init(ManagerFactoryParameters)`.

    Parameters:
      `ks` - the key store, or null
    Throws:
      `KeyStoreException` - if this operation fails

  - ### init

    public final void init(ManagerFactoryParameters spec) throws InvalidAlgorithmParameterException
    Initializes this factory with a source of provider-specific trust material.

    In some cases, initialization parameters other than a keystore may be needed by a provider. Users of that particular provider are expected to pass an implementation of the appropriate `ManagerFactoryParameters` as defined by the provider. The provider can then call the specified methods in the `ManagerFactoryParameters` implementation to obtain the needed information.

    Parameters:
      `spec` - an implementation of a provider-specific parameter specification
    Throws:
      `InvalidAlgorithmParameterException` - if an error is encountered

  - ### getTrustManagers

    public final TrustManager[] getTrustManagers()
    Returns one trust manager for each type of trust material.
    Returns:
      the trust managers
    Throws:
      `IllegalStateException` - if the factory is not initialized.