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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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package javax.net.ssl;

import java.security.Security;
import java.security.*;

import sun.security.jca.GetInstance;


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.

See Also:
Since:1.4
/**
 * 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.
 *
 * @since 1.4
 * @see TrustManager
 */
public class TrustManagerFactory {
    // The provider
    private Provider provider;

    // The provider implementation (delegate)
    private TrustManagerFactorySpi factorySpi;

    // The name of the trust management algorithm.
    private String algorithm;

    
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. 
See Also:
Returns:the default algorithm name as specified by the ssl.TrustManagerFactory.algorithm security property, or an implementation-specific default if no such property exists.
/**
     * Obtains the default TrustManagerFactory algorithm name.
     *
     * <p>The default TrustManager can be changed at runtime by setting
     * the value of the {@code ssl.TrustManagerFactory.algorithm}
     * security property to the desired algorithm name.
     *
     * @see java.security.Security security properties
     * @return the default algorithm name as specified by the
     * {@code ssl.TrustManagerFactory.algorithm} security property, or an
     * implementation-specific default if no such property exists.
     */
    public final static String getDefaultAlgorithm() {
        String type;
        type = AccessController.doPrivileged(new PrivilegedAction<String>() {
            @Override
            public String run() {
                return Security.getProperty(
                    "ssl.TrustManagerFactory.algorithm");
            }
        });
        if (type == null) {
            type = "SunX509";
        }
        return type;
    }

    
Creates a TrustManagerFactory object.

Params:
  • factorySpi – the delegate
  • provider – the provider
  • algorithm – the algorithm
/**
     * Creates a TrustManagerFactory object.
     *
     * @param factorySpi the delegate
     * @param provider the provider
     * @param algorithm the algorithm
     */
    protected TrustManagerFactory(TrustManagerFactorySpi factorySpi,
            Provider provider, String algorithm) {
        this.factorySpi = factorySpi;
        this.provider = provider;
        this.algorithm = algorithm;
    }

    
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
/**
     * Returns the algorithm name of this <code>TrustManagerFactory</code>
     * object.
     *
     * <p>This is the same name that was specified in one of the
     * <code>getInstance</code> calls that created this
     * <code>TrustManagerFactory</code> object.
     *
     * @return the algorithm name of this <code>TrustManagerFactory</code>
     *          object
     */
    public final String getAlgorithm() {
        return this.algorithm;
    }

    
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. 
Params:
Throws:
See Also:
Returns:the new TrustManagerFactory object.
/**
     * Returns a <code>TrustManagerFactory</code> object that acts as a
     * factory for trust managers.
     *
     * <p> 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.
     *
     * <p> Note that the list of registered providers may be retrieved via
     * the {@link Security#getProviders() Security.getProviders()} method.
     *
     * @param algorithm the standard name of the requested trust management
     *          algorithm.  See the <a href=
     *  "{@docRoot}/../technotes/guides/security/jsse/JSSERefGuide.html">
     *          Java Secure Socket Extension Reference Guide </a>
     *          for information about standard algorithm names.
     *
     * @return the new <code>TrustManagerFactory</code> object.
     *
     * @exception NoSuchAlgorithmException if no Provider supports a
     *          TrustManagerFactorySpi implementation for the
     *          specified algorithm.
     * @exception NullPointerException if algorithm is null.
     *
     * @see java.security.Provider
     */
    public static final TrustManagerFactory getInstance(String algorithm)
            throws NoSuchAlgorithmException {
        GetInstance.Instance instance = GetInstance.getInstance
                ("TrustManagerFactory", TrustManagerFactorySpi.class,
                algorithm);
        return new TrustManagerFactory((TrustManagerFactorySpi)instance.impl,
                instance.provider, algorithm);
    }

    
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. 
Params:
Throws:
See Also:
Returns:the new TrustManagerFactory object
/**
     * Returns a <code>TrustManagerFactory</code> object that acts as a
     * factory for trust managers.
     *
     * <p> 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.
     *
     * <p> Note that the list of registered providers may be retrieved via
     * the {@link Security#getProviders() Security.getProviders()} method.
     *
     * @param algorithm the standard name of the requested trust management
     *          algorithm.  See the <a href=
     *  "{@docRoot}/../technotes/guides/security/jsse/JSSERefGuide.html">
     *          Java Secure Socket Extension Reference Guide </a>
     *          for information about standard algorithm names.
     *
     * @param provider the name of the provider.
     *
     * @return the new <code>TrustManagerFactory</code> object
     *
     * @throws NoSuchAlgorithmException if a TrustManagerFactorySpi
     *          implementation for the specified algorithm is not
     *          available from the specified provider.
     *
     * @throws NoSuchProviderException if the specified provider is not
     *          registered in the security provider list.
     *
     * @throws IllegalArgumentException if the provider name is null or empty.
     * @throws NullPointerException if algorithm is null.
     *
     * @see java.security.Provider
     */
    public static final TrustManagerFactory getInstance(String algorithm,
            String provider) throws NoSuchAlgorithmException,
            NoSuchProviderException {
        GetInstance.Instance instance = GetInstance.getInstance
                ("TrustManagerFactory", TrustManagerFactorySpi.class,
                algorithm, provider);
        return new TrustManagerFactory((TrustManagerFactorySpi)instance.impl,
                instance.provider, algorithm);
    }

    
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.

Params:
Throws:
See Also:
Returns:the new TrustManagerFactory object.
/**
     * Returns a <code>TrustManagerFactory</code> object that acts as a
     * factory for trust managers.
     *
     * <p> 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.
     *
     * @param algorithm the standard name of the requested trust management
     *          algorithm.  See the <a href=
     *  "{@docRoot}/../technotes/guides/security/jsse/JSSERefGuide.html">
     *          Java Secure Socket Extension Reference Guide </a>
     *          for information about standard algorithm names.
     *
     * @param provider an instance of the provider.
     *
     * @return the new <code>TrustManagerFactory</code> object.
     *
     * @throws NoSuchAlgorithmException if a TrustManagerFactorySpi
     *          implementation for the specified algorithm is not available
     *          from the specified Provider object.
     *
     * @throws IllegalArgumentException if the provider is null.
     * @throws NullPointerException if algorithm is null.
     *
     * @see java.security.Provider
     */
    public static final TrustManagerFactory getInstance(String algorithm,
            Provider provider) throws NoSuchAlgorithmException {
        GetInstance.Instance instance = GetInstance.getInstance
                ("TrustManagerFactory", TrustManagerFactorySpi.class,
                algorithm, provider);
        return new TrustManagerFactory((TrustManagerFactorySpi)instance.impl,
                instance.provider, algorithm);
    }

    
Returns the provider of this TrustManagerFactory object.

Returns:the provider of this TrustManagerFactory object
/**
     * Returns the provider of this <code>TrustManagerFactory</code> object.
     *
     * @return the provider of this <code>TrustManagerFactory</code> object
     */
    public final Provider getProvider() {
        return this.provider;
    }


    
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). 
Params:
  • ks – the key store, or null
Throws:
/**
     * Initializes this factory with a source of certificate
     * authorities and related trust material.
     * <P>
     * The provider typically uses a KeyStore as a basis for making
     * trust decisions.
     * <P>
     * For more flexible initialization, please see
     * {@link #init(ManagerFactoryParameters)}.
     *
     * @param ks the key store, or null
     * @throws KeyStoreException if this operation fails
     */
    public final void init(KeyStore ks) throws KeyStoreException {
        factorySpi.engineInit(ks);
    }


    
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.

Params:
  • spec – an implementation of a provider-specific parameter
         specification
Throws:
/**
     * Initializes this factory with a source of provider-specific
     * trust material.
     * <P>
     * 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
     * <CODE>ManagerFactoryParameters</CODE> as defined by the
     * provider.  The provider can then call the specified methods in
     * the <CODE>ManagerFactoryParameters</CODE> implementation to obtain the
     * needed information.
     *
     * @param spec an implementation of a provider-specific parameter
     *          specification
     * @throws InvalidAlgorithmParameterException if an error is
     *          encountered
     */
    public final void init(ManagerFactoryParameters spec) throws
            InvalidAlgorithmParameterException {
        factorySpi.engineInit(spec);
    }


    
Returns one trust manager for each type of trust material.

Throws:
  • IllegalStateException – if the factory is not initialized.
Returns:the trust managers
/**
     * Returns one trust manager for each type of trust material.
     *
     * @throws IllegalStateException if the factory is not initialized.
     *
     * @return the trust managers
     */
    public final TrustManager[] getTrustManagers() {
        return factorySpi.engineGetTrustManagers();
    }
}