Provider

public abstract class Provider extends Properties

This class represents a "provider" for the Java Security API, where a provider implements some or all parts of Java Security. Services that a provider may implement include:

• Algorithms (such as DSA, RSA, MD5 or SHA-1).
• Key generation, conversion, and management facilities (such as for algorithm-specific keys).

Each provider has a name and a version number, and is configured in each runtime it is installed in.

See The Provider Class in the "Java Cryptography Architecture API Specification & Reference" for information about how a particular type of provider, the cryptographic service provider, works and is installed. However, please note that a provider can be used to implement any security service in Java that uses a pluggable architecture with a choice of implementations that fit underneath.

Some provider implementations may encounter unrecoverable internal errors during their operation, for example a failure to communicate with a security token. A ProviderException should be used to indicate such errors.

The service type Provider is reserved for use by the security framework. Services of this type cannot be added, removed, or modified by applications. The following attributes are automatically placed in each Provider object:

Attributes Automatically Placed in a Provider Object

Name	Value
Provider.id name	String.valueOf(provider.getName())
Provider.id version	String.valueOf(provider.getVersion())
Provider.id info	String.valueOf(provider.getInfo())
Provider.id className	provider.getClass().getName()

Nested Class Summary

class

Provider.Service

The description of a security service.

Inherited Field Summary

From class java.util.Properties

protected Properties

defaults

A property list that contains default values for any keys not found in this property list.

Protected Constructor Summary

Provider(String name, double version, String info) Constructs a provider with the specified name, version number, and information.

Public Method Summary

synchronized void	clear() Clears this provider so that it no longer contains the properties used to look up facilities implemented by the provider.
synchronized Object	compute(Object key, BiFunction<? super Object, ? super Object, ? extends Object> remappingFunction) Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).
synchronized Object	computeIfAbsent(Object key, Function<? super Object, ? extends Object> mappingFunction) If the specified key is not already associated with a value (or is mapped to null), attempts to compute its value using the given mapping function and enters it into this map unless null.
synchronized Object	computeIfPresent(Object key, BiFunction<? super Object, ? super Object, ? extends Object> remappingFunction) If the value for the specified key is present and non-null, attempts to compute a new mapping given the key and its current mapped value.
Enumeration<Object>	elements() Returns an enumeration of the values in this hashtable.
synchronized Set<Entry<Object, Object>>	entrySet() Returns an unmodifiable Set view of the property entries contained in this Provider.
synchronized void	forEach(BiConsumer<? super Object, ? super Object> action) Performs the given action for each entry in this map until all entries have been processed or the action throws an exception.
Object	get(Object key) Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.
String	getInfo() Returns a human-readable description of the provider and its services.
String	getName() Returns the name of this provider.
synchronized Object	getOrDefault(Object key, Object defaultValue) Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.
String	getProperty(String key) Searches for the property with the specified key in this property list.
synchronized Provider.Service	getService(String type, String algorithm) Get the service describing this Provider's implementation of the specified type of this algorithm or alias.
synchronized Set<Provider.Service>	getServices() Get an unmodifiable Set of all services supported by this Provider.
double	getVersion() Returns the version number for this provider.
Set<Object>	keySet() Returns an unmodifiable Set view of the property keys contained in this provider.
Enumeration<Object>	keys() Returns an enumeration of the keys in this hashtable.
synchronized void	load(InputStream inStream) Reads a property list (key and element pairs) from the input stream.
synchronized Object	merge(Object key, Object value, BiFunction<? super Object, ? super Object, ? extends Object> remappingFunction) If the specified key is not already associated with a value or is associated with null, associates it with the given value.
synchronized Object	put(Object key, Object value) Sets the key property to have the specified value.
synchronized void	putAll(Map<?, ?> t) Copies all of the mappings from the specified Map to this provider.
synchronized Object	putIfAbsent(Object key, Object value) If the specified key is not already associated with a value (or is mapped to null) associates it with the given value and returns null, else returns the current value.
synchronized boolean	remove(Object key, Object value) Removes the entry for the specified key only if it is currently mapped to the specified value.
synchronized Object	remove(Object key) Removes the key property (and its corresponding value).
synchronized Object	replace(Object key, Object value) Replaces the entry for the specified key only if it is currently mapped to some value.
synchronized boolean	replace(Object key, Object oldValue, Object newValue) Replaces the entry for the specified key only if currently mapped to the specified value.
synchronized void	replaceAll(BiFunction<? super Object, ? super Object, ? extends Object> function) Replaces each entry's value with the result of invoking the given function on that entry, in the order entries are returned by an entry set iterator, until all entries have been processed or the function throws an exception.
String	toString() Returns a string with the name and the version number of this provider.
Collection<Object>	values() Returns an unmodifiable Collection view of the property values contained in this provider.

Protected Method Summary

synchronized void	putService(Provider.Service s) Add a service.
synchronized void	removeService(Provider.Service s) Remove a service previously added using putService().

Inherited Method Summary

From class java.util.Properties

String	getProperty(String key, String defaultValue) Searches for the property with the specified key in this property list.
String	getProperty(String key) Searches for the property with the specified key in this property list.
void	list(PrintStream out) Prints this property list out to the specified output stream.
void	list(PrintWriter out) Prints this property list out to the specified output stream.
synchronized void	load(InputStream inStream) Reads a property list (key and element pairs) from the input byte stream.
synchronized void	load(Reader reader) Reads a property list (key and element pairs) from the input character stream in a simple line-oriented format.
synchronized void	loadFromXML(InputStream in) Loads all of the properties represented by the XML document on the specified input stream into this properties table.
Enumeration<?>	propertyNames() Returns an enumeration of all the keys in this property list, including distinct keys in the default property list if a key of the same name has not already been found from the main properties list.
void	save(OutputStream out, String comments) This method is deprecated. This method does not throw an IOException if an I/O error occurs while saving the property list. The preferred way to save a properties list is via the store(OutputStream out, String comments) method or the storeToXML(OutputStream os, String comment) method.
synchronized Object	setProperty(String key, String value) Calls the Hashtable method put.
void	store(OutputStream out, String comments) Writes this property list (key and element pairs) in this Properties table to the output stream in a format suitable for loading into a Properties table using the load(InputStream) method.
void	store(Writer writer, String comments) Writes this property list (key and element pairs) in this Properties table to the output character stream in a format suitable for using the load(Reader) method.
void	storeToXML(OutputStream os, String comment, String encoding) Emits an XML document representing all of the properties contained in this table, using the specified encoding.
void	storeToXML(OutputStream os, String comment) Emits an XML document representing all of the properties contained in this table.
Set<String>	stringPropertyNames() Returns a set of keys in this property list where the key and its corresponding value are strings, including distinct keys in the default property list if a key of the same name has not already been found from the main properties list.

From class java.util.Hashtable

synchronized void	clear() Clears this hashtable so that it contains no keys.
synchronized Object	clone() Creates a shallow copy of this hashtable.
synchronized Object	compute(Object key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).
synchronized Object	computeIfAbsent(Object key, Function<? super K, ? extends V> mappingFunction) If the specified key is not already associated with a value (or is mapped to null), attempts to compute its value using the given mapping function and enters it into this map unless null.
synchronized Object	computeIfPresent(Object key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) If the value for the specified key is present and non-null, attempts to compute a new mapping given the key and its current mapped value.
synchronized boolean	contains(Object value) Tests if some key maps into the specified value in this hashtable.
synchronized boolean	containsKey(Object key) Tests if the specified object is a key in this hashtable.
boolean	containsValue(Object value) Returns true if this hashtable maps one or more keys to this value.
synchronized Enumeration<Object>	elements() Returns an enumeration of the values in this hashtable.
Set<Entry<Object, Object>>	entrySet() Returns a Set view of the mappings contained in this map.
synchronized boolean	equals(Object o) Compares the specified Object with this Map for equality, as per the definition in the Map interface.
synchronized void	forEach(BiConsumer<? super K, ? super V> action) Performs the given action for each entry in this map until all entries have been processed or the action throws an exception.
synchronized Object	get(Object key) Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.
synchronized Object	getOrDefault(Object key, Object defaultValue) Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.
synchronized int	hashCode() Returns the hash code value for this Map as per the definition in the Map interface.
synchronized boolean	isEmpty() Tests if this hashtable maps no keys to values.
Set<Object>	keySet() Returns a Set view of the keys contained in this map.
synchronized Enumeration<Object>	keys() Returns an enumeration of the keys in this hashtable.
synchronized Object	merge(Object key, Object value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) If the specified key is not already associated with a value or is associated with null, associates it with the given non-null value.
synchronized Object	put(Object key, Object value) Maps the specified key to the specified value in this hashtable.
synchronized void	putAll(Map<? extends K, ? extends V> t) Copies all of the mappings from the specified map to this hashtable.
synchronized Object	putIfAbsent(Object key, Object value) If the specified key is not already associated with a value (or is mapped to null) associates it with the given value and returns null, else returns the current value.
void	rehash() Increases the capacity of and internally reorganizes this hashtable, in order to accommodate and access its entries more efficiently.
synchronized boolean	remove(Object key, Object value) Removes the entry for the specified key only if it is currently mapped to the specified value.
synchronized Object	remove(Object key) Removes the key (and its corresponding value) from this hashtable.
synchronized boolean	replace(Object key, Object oldValue, Object newValue) Replaces the entry for the specified key only if currently mapped to the specified value.
synchronized Object	replace(Object key, Object value) Replaces the entry for the specified key only if it is currently mapped to some value.
synchronized void	replaceAll(BiFunction<? super K, ? super V, ? extends V> function) Replaces each entry's value with the result of invoking the given function on that entry until all entries have been processed or the function throws an exception.
synchronized int	size() Returns the number of keys in this hashtable.
synchronized String	toString() Returns a string representation of this Hashtable object in the form of a set of entries, enclosed in braces and separated by the ASCII characters ", " (comma and space).
Collection<Object>	values() Returns a Collection view of the values contained in this map.

From class java.util.Dictionary

abstract Enumeration<Object>	elements() Returns an enumeration of the values in this dictionary.
abstract Object	get(Object key) Returns the value to which the key is mapped in this dictionary.
abstract boolean	isEmpty() Tests if this dictionary maps no keys to value.
abstract Enumeration<Object>	keys() Returns an enumeration of the keys in this dictionary.
abstract Object	put(Object key, Object value) Maps the specified key to the specified value in this dictionary.
abstract Object	remove(Object key) Removes the key (and its corresponding value) from this dictionary.
abstract int	size() Returns the number of entries (distinct keys) in this dictionary.

From class java.lang.Object

Object	clone() Creates and returns a copy of this Object.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of Class that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.

From interface java.util.Map

abstract void	clear() Removes all of the mappings from this map (optional operation).
Object	compute(Object key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).
Object	computeIfAbsent(Object key, Function<? super K, ? extends V> mappingFunction) If the specified key is not already associated with a value (or is mapped to null), attempts to compute its value using the given mapping function and enters it into this map unless null.
Object	computeIfPresent(Object key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) If the value for the specified key is present and non-null, attempts to compute a new mapping given the key and its current mapped value.
abstract boolean	containsKey(Object key) Returns true if this map contains a mapping for the specified key.
abstract boolean	containsValue(Object value) Returns true if this map maps one or more keys to the specified value.
abstract Set<Entry<Object, Object>>	entrySet() Returns a Set view of the mappings contained in this map.
abstract boolean	equals(Object o) Compares the specified object with this map for equality.
void	forEach(BiConsumer<? super K, ? super V> action) Performs the given action for each entry in this map until all entries have been processed or the action throws an exception.
abstract Object	get(Object key) Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.
Object	getOrDefault(Object key, Object defaultValue) Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.
abstract int	hashCode() Returns the hash code value for this map.
abstract boolean	isEmpty() Returns true if this map contains no key-value mappings.
abstract Set<Object>	keySet() Returns a Set view of the keys contained in this map.
Object	merge(Object key, Object value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) If the specified key is not already associated with a value or is associated with null, associates it with the given non-null value.
abstract Object	put(Object key, Object value) Associates the specified value with the specified key in this map (optional operation).
abstract void	putAll(Map<? extends K, ? extends V> m) Copies all of the mappings from the specified map to this map (optional operation).
Object	putIfAbsent(Object key, Object value) If the specified key is not already associated with a value (or is mapped to null) associates it with the given value and returns null, else returns the current value.
boolean	remove(Object key, Object value) Removes the entry for the specified key only if it is currently mapped to the specified value.
abstract Object	remove(Object key) Removes the mapping for a key from this map if it is present (optional operation).
boolean	replace(Object key, Object oldValue, Object newValue) Replaces the entry for the specified key only if currently mapped to the specified value.
Object	replace(Object key, Object value) Replaces the entry for the specified key only if it is currently mapped to some value.
void	replaceAll(BiFunction<? super K, ? super V, ? extends V> function) Replaces each entry's value with the result of invoking the given function on that entry until all entries have been processed or the function throws an exception.
abstract int	size() Returns the number of key-value mappings in this map.
abstract Collection<Object>	values() Returns a Collection view of the values contained in this map.

Protected Constructors

protected Provider (String name, double version, String info)

Constructs a provider with the specified name, version number, and information.

Parameters

name	the provider name.
version	the provider version number.
info	a description of the provider and its services.

Public Methods

public synchronized void clear ()

Clears this provider so that it no longer contains the properties used to look up facilities implemented by the provider.

If a security manager is enabled, its checkSecurityAccess method is called with the string "clearProviderProperties."+name (where name is the provider name) to see if it's ok to clear this provider.

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to clear this provider

public synchronized Object compute (Object key, BiFunction<? super Object, ? super Object, ? extends Object> remappingFunction)

Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).

If a security manager is enabled, its checkSecurityAccess method is called with the strings "putProviderProperty."+name and "removeProviderProperty."+name, where name is the provider name, to see if it's ok to set this provider's property values and remove this provider's properties.

Parameters

key	key with which the specified value is to be associated
remappingFunction	the remapping function to compute a value

Returns

• the new value associated with the specified key, or null if none

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to set property values or remove properties.

public synchronized Object computeIfAbsent (Object key, Function<? super Object, ? extends Object> mappingFunction)

If the specified key is not already associated with a value (or is mapped to null), attempts to compute its value using the given mapping function and enters it into this map unless null.

If a security manager is enabled, its checkSecurityAccess method is called with the strings "putProviderProperty."+name and "removeProviderProperty."+name, where name is the provider name, to see if it's ok to set this provider's property values and remove this provider's properties.

Parameters

key	key with which the specified value is to be associated
mappingFunction	the mapping function to compute a value

Returns

• the current (existing or computed) value associated with the specified key, or null if the computed value is null

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to set property values and remove properties.

public synchronized Object computeIfPresent (Object key, BiFunction<? super Object, ? super Object, ? extends Object> remappingFunction)

If the value for the specified key is present and non-null, attempts to compute a new mapping given the key and its current mapped value.

If a security manager is enabled, its checkSecurityAccess method is called with the strings "putProviderProperty."+name and "removeProviderProperty."+name, where name is the provider name, to see if it's ok to set this provider's property values and remove this provider's properties.

Parameters

key	key with which the specified value is to be associated
remappingFunction	the remapping function to compute a value

Returns

• the new value associated with the specified key, or null if none

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to set property values or remove properties.

public Enumeration<Object> elements ()

Returns an enumeration of the values in this hashtable. Use the Enumeration methods on the returned object to fetch the elements sequentially.

Returns

• an enumeration of the values in this hashtable.

public synchronized Set<Entry<Object, Object>> entrySet ()

Returns an unmodifiable Set view of the property entries contained in this Provider.

Returns

• a set view of the mappings contained in this map

See Also

• Map.Entry

public synchronized void forEach (BiConsumer<? super Object, ? super Object> action)

Performs the given action for each entry in this map until all entries have been processed or the action throws an exception. Unless otherwise specified by the implementing class, actions are performed in the order of entry set iteration (if an iteration order is specified.) Exceptions thrown by the action are relayed to the caller.

Parameters

action	The action to be performed for each entry

public Object get (Object key)

Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.

More formally, if this map contains a mapping from a key k to a value v such that (key.equals(k)), then this method returns v; otherwise it returns null. (There can be at most one such mapping.)

Parameters

key	the key whose associated value is to be returned

Returns

• the value to which the specified key is mapped, or null if this map contains no mapping for the key

public String getInfo ()

Returns a human-readable description of the provider and its services. This may return an HTML page, with relevant links.

Returns

• a description of the provider and its services.

public String getName ()

Returns the name of this provider.

Returns

• the name of this provider.

public synchronized Object getOrDefault (Object key, Object defaultValue)

Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.

Parameters

key	the key whose associated value is to be returned
defaultValue	the default mapping of the key

Returns

• the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key

public String getProperty (String key)

Searches for the property with the specified key in this property list. If the key is not found in this property list, the default property list, and its defaults, recursively, are then checked. The method returns null if the property is not found.

Parameters

key	the property key.

Returns

• the value in this property list with the specified key value.

public synchronized Provider.Service getService (String type, String algorithm)

Get the service describing this Provider's implementation of the specified type of this algorithm or alias. If no such implementation exists, this method returns null. If there are two matching services, one added to this provider using putService() and one added via put(), the service added via putService() is returned.

Parameters

type	the type of service requested (for example, MessageDigest)
algorithm	the case insensitive algorithm name (or alternate alias) of the service requested (for example, SHA-1)

Returns

• the service describing this Provider's matching service or null if no such service exists

Throws

NullPointerException	if type or algorithm is null

public synchronized Set<Provider.Service> getServices ()

Get an unmodifiable Set of all services supported by this Provider.

Returns

• an unmodifiable Set of all services supported by this Provider

public double getVersion ()

Returns the version number for this provider.

Returns

• the version number for this provider.

public Set<Object> keySet ()

Returns an unmodifiable Set view of the property keys contained in this provider.

Returns

• a set view of the keys contained in this map

public Enumeration<Object> keys ()

Returns an enumeration of the keys in this hashtable.

Returns

• an enumeration of the keys in this hashtable.

public synchronized void load (InputStream inStream)

Reads a property list (key and element pairs) from the input stream.

Parameters

inStream	the input stream.

Throws

IOException	if an error occurred when reading from the input stream.

See Also

• Properties.load(InputStream)

public synchronized Object merge (Object key, Object value, BiFunction<? super Object, ? super Object, ? extends Object> remappingFunction)

If the specified key is not already associated with a value or is associated with null, associates it with the given value. Otherwise, replaces the value with the results of the given remapping function, or removes if the result is null. This method may be of use when combining multiple mapped values for a key.

If a security manager is enabled, its checkSecurityAccess method is called with the strings "putProviderProperty."+name and "removeProviderProperty."+name, where name is the provider name, to see if it's ok to set this provider's property values and remove this provider's properties.

Parameters

key	key with which the resulting value is to be associated
value	the non-null value to be merged with the existing value associated with the key or, if no existing value or a null value is associated with the key, to be associated with the key
remappingFunction	the remapping function to recompute a value if present

Returns

• the new value associated with the specified key, or null if no value is associated with the key

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to set property values or remove properties.

public synchronized Object put (Object key, Object value)

Sets the key property to have the specified value.

If a security manager is enabled, its checkSecurityAccess method is called with the string "putProviderProperty."+name, where name is the provider name, to see if it's ok to set this provider's property values.

Parameters

key	the hashtable key
value	the value

Returns

• the previous value of the specified key in this hashtable, or null if it did not have one

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to set property values.

public synchronized void putAll (Map<?, ?> t)

Copies all of the mappings from the specified Map to this provider. These mappings will replace any properties that this provider had for any of the keys currently in the specified Map.

Parameters

t	mappings to be stored in this map

public synchronized Object putIfAbsent (Object key, Object value)

If the specified key is not already associated with a value (or is mapped to null) associates it with the given value and returns null, else returns the current value.

If a security manager is enabled, its checkSecurityAccess method is called with the string "putProviderProperty."+name, where name is the provider name, to see if it's ok to set this provider's property values.

Parameters

key	key with which the specified value is to be associated
value	value to be associated with the specified key

Returns

• the previous value associated with the specified key, or null if there was no mapping for the key. (A null return can also indicate that the map previously associated null with the key, if the implementation supports null values.)

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to set property values.

public synchronized boolean remove (Object key, Object value)

Removes the entry for the specified key only if it is currently mapped to the specified value.

If a security manager is enabled, its checkSecurityAccess method is called with the string "removeProviderProperty."+name, where name is the provider name, to see if it's ok to remove this provider's properties.

Parameters

key	key with which the specified value is associated
value	value expected to be associated with the specified key

Returns

• true if the value was removed

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to remove this provider's properties.

public synchronized Object remove (Object key)

Removes the key property (and its corresponding value).

If a security manager is enabled, its checkSecurityAccess method is called with the string "removeProviderProperty."+name, where name is the provider name, to see if it's ok to remove this provider's properties.

Parameters

key	the key that needs to be removed

Returns

• the value to which the key had been mapped in this hashtable, or null if the key did not have a mapping

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to remove this provider's properties.

public synchronized Object replace (Object key, Object value)

Replaces the entry for the specified key only if it is currently mapped to some value.

If a security manager is enabled, its checkSecurityAccess method is called with the string "putProviderProperty."+name, where name is the provider name, to see if it's ok to set this provider's property values.

Parameters

key	key with which the specified value is associated
value	value to be associated with the specified key

Returns

• the previous value associated with the specified key, or null if there was no mapping for the key. (A null return can also indicate that the map previously associated null with the key, if the implementation supports null values.)

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to set property values.

public synchronized boolean replace (Object key, Object oldValue, Object newValue)

Replaces the entry for the specified key only if currently mapped to the specified value.

If a security manager is enabled, its checkSecurityAccess method is called with the string "putProviderProperty."+name, where name is the provider name, to see if it's ok to set this provider's property values.

Parameters

key	key with which the specified value is associated
oldValue	value expected to be associated with the specified key
newValue	value to be associated with the specified key

Returns

• true if the value was replaced

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to set property values.

public synchronized void replaceAll (BiFunction<? super Object, ? super Object, ? extends Object> function)

Replaces each entry's value with the result of invoking the given function on that entry, in the order entries are returned by an entry set iterator, until all entries have been processed or the function throws an exception.

If a security manager is enabled, its checkSecurityAccess method is called with the string "putProviderProperty."+name, where name is the provider name, to see if it's ok to set this provider's property values.

Parameters

function	the function to apply to each entry

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to set property values.

public String toString ()

Returns a string with the name and the version number of this provider.

Returns

• the string with the name and the version number for this provider.

public Collection<Object> values ()

Returns an unmodifiable Collection view of the property values contained in this provider.

Returns

• a collection view of the values contained in this map

Protected Methods

protected synchronized void putService (Provider.Service s)

Add a service. If a service of the same type with the same algorithm name exists and it was added using putService(), it is replaced by the new service. This method also places information about this service in the provider's Hashtable values in the format described in the Java Cryptography Architecture API Specification & Reference .

Also, if there is a security manager, its checkSecurityAccess method is called with the string "putProviderProperty."+name, where name is the provider name, to see if it's ok to set this provider's property values. If the default implementation of checkSecurityAccess is used (that is, that method is not overriden), then this results in a call to the security manager's checkPermission method with a SecurityPermission("putProviderProperty."+name) permission.

Parameters

s	the Service to add

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to set property values.
NullPointerException	if s is null

protected synchronized void removeService (Provider.Service s)

Remove a service previously added using putService(). The specified service is removed from this provider. It will no longer be returned by getService() and its information will be removed from this provider's Hashtable.

Also, if there is a security manager, its checkSecurityAccess method is called with the string "removeProviderProperty."+name, where name is the provider name, to see if it's ok to remove this provider's properties. If the default implementation of checkSecurityAccess is used (that is, that method is not overriden), then this results in a call to the security manager's checkPermission method with a SecurityPermission("removeProviderProperty."+name) permission.

Parameters

s	the Service to be removed

Throws

SecurityException	if a security manager exists and its SecurityManager.checkSecurityAccess(String) method denies access to remove this provider's properties.
NullPointerException	if s is null