java.lang.Object
java.util.Dictionary<K,V>
java.util.Hashtable<Object,Object>
java.util.Properties
java.security.Provider
public abstract class Provider
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:
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:
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()
static class Provider.Service
protected Provider(String name, double version, String info)
getProperty, getProperty, list, list, loadFromXML, propertyNames, save, setProperty, store, storeToXML, storeToXML Methods inherited from class java.util.Hashtable clone, contains, containsKey, containsValue, elements, equals, get, hashCode, isEmpty, keys, rehash, size Provider
protected Provider(String name,
double version,
String info)
name - the provider name.
version - the provider version number.
info - a description of the provider and its services.
public String getName()
public double getVersion()
public String getInfo()
public String toString()
toString in class Hashtable<Object,Object>
public void clear()
First, if there is a security manager, 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. 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("clearProviderProperties."+name) permission.
clear in interface Map<Object,Object>
clear in class Hashtable<Object,Object>
SecurityException - if a security manager exists and its SecurityManager.checkSecurityAccess(java.lang.String)public void load(InputStream inStream)
throws IOException
load in class Properties
inStream - the input stream.
IOException - if an error occurred when reading from the input stream.
Properties.load(java.io.InputStream)
public void putAll(Map<?,?> t)
putAll in interface Map<Object,Object>
putAll in class Hashtable<Object,Object>
t - Mappings to be stored in this map.
public Set<Map.Entry<Object,Object>> entrySet()
entrySet in interface Map<Object,Object>
entrySet in class Hashtable<Object,Object>
Map.Entry
public Set<Object> keySet()
keySet in interface Map<Object,Object>
keySet in class Hashtable<Object,Object>
public Collection<Object> values()
values in interface Map<Object,Object>
values in class Hashtable<Object,Object>
public Object put(Object key,
Object value)
key property to have the specified value.
First, 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.
put in interface Map<Object,Object>
put in class Hashtable<Object,Object>
key - the property key.
value - the property value.
key), or null if it did not have one.
SecurityException - if a security manager exists and its SecurityManager.checkSecurityAccess(java.lang.String)Object.equals(Object), Hashtable.get(Object)
public Object remove(Object key)
key property (and its corresponding value).
First, 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.
remove in interface Map<Object,Object>
remove in class Hashtable<Object,Object>
key - the key for the property to be removed.
SecurityException - if a security manager exists and its SecurityManager.checkSecurityAccess(java.lang.String)public Provider.Service getService(String type,
String algorithm)
putService() and one added via put(), the service added via putService() is returned.
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)
NullPointerException - if type or algorithm is null
public Set<Provider.Service> getServices()
protected void putService(Provider.Service s)
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.
s - the Service to add
SecurityException - if a security manager exists and its SecurityManager.checkSecurityAccess(java.lang.String)NullPointerException - if s is null
protected void removeService(Provider.Service s)
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.
s - the Service to be removed
SecurityException - if a security manager exists and its SecurityManager.checkSecurityAccess(java.lang.String)NullPointerException - if s is null
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