| /* Provider.java -- Security provider information |
| Copyright (C) 1998, 1999, 2000, 2002 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package java.security; |
| |
| import java.io.Serializable; |
| import java.util.Properties; |
| |
| /** |
| * This class represents a Java security architecture service provider. |
| * The services provided by a such a provider can range from security |
| * algorithms to key generation. |
| * <p> |
| * Providers are installed by name and version number. There is one |
| * standard provider supplied with the class library. This is the |
| * "GNU" provider, which can also be accessed by the alias "SUN" for |
| * compatibility with the JDK. |
| * |
| * @version 0.0 |
| * |
| * @author Aaron M. Renn (arenn@urbanophile.com) |
| */ |
| public abstract class Provider extends Properties implements Serializable |
| { |
| private static final long serialVersionUID = -4298000515446427739L; |
| |
| /** |
| * This is a textual description of the provider |
| */ |
| private String info; |
| |
| /** |
| * This is the name of the provider |
| */ |
| private String name; |
| |
| /** |
| * This is the version number of the provider |
| */ |
| private double version; |
| |
| /** |
| * This method initializes a new instance of <code>Provider</code> to have |
| * the specified name, version, and description information. |
| * |
| * @param name The name to assign to this <code>Provider</code>. |
| * @param version The version number for this <code>Provider</code>. |
| * @param info A textual description of this provider. |
| */ |
| protected Provider(String name, double version, String info) |
| { |
| this.name = name; |
| this.version = version; |
| this.info = info; |
| } |
| |
| /** |
| * This method returns the name assigned to this <code>Provider</code>. |
| * |
| * @return The <code>Provider</code>'s name. |
| */ |
| public String getName() |
| { |
| return (name); |
| } |
| |
| /** |
| * This method retunrs the version number of this <code>Provider</code>. |
| * |
| * @return The <code>Provider</code>'s version number. |
| */ |
| public double getVersion() |
| { |
| return (version); |
| } |
| |
| /** |
| * This method returns a textual description of the <code>Provider</code>. |
| * |
| * @return A description of the <code>Provider</code>. |
| */ |
| public String getInfo() |
| { |
| return (info); |
| } |
| |
| /** |
| * Sets the key property to have the specified value. |
| * <p> |
| * <bold>NOT IMPLEMENTED YET</bold>[ |
| * First, if there is a security manager, its <code>checkSecurityAccess</code> |
| * 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 <code>checkSecurityAccess</code> is used |
| * (that is, that method is not overriden), then this results in a call to the |
| * security manager's <code>checkPermission</code> method with a |
| * <code>SecurityPermission("putProviderProperty."+name)</code> |
| * permission.<br>] |
| * |
| * @param key The property key. |
| * @param value The property value. |
| * |
| * @return The previous value of the specified property (<code>key</code>), |
| * or <code>null</code> if it did not have one. |
| * @throws SecurityException If a security manager exists and its |
| * {@link java.lang.SecurityManager.checkSecurityAccess(java.lang.String)} |
| * method denies access to set property values. |
| * @since Classpath 0.4+cvs, JDK 1.2 |
| * @see java.lang.Object.equals(Object) |
| * @see java.util.Hashtable.get(Object) |
| */ |
| public Object put(Object key, Object value) |
| { |
| return super.put(toCanonicalKey(key), value); |
| } |
| |
| // overrides same in java.util.Hashtable |
| public Object get(Object key) |
| { |
| return super.get(toCanonicalKey(key)); |
| } |
| |
| /** |
| * This method removes the specified key entry (and its associated value) |
| * from the property mapping list. |
| * |
| * @param key The key to remove |
| * |
| * @return The previous value for this key, or <code>null</code> if no |
| * previous value. |
| */ |
| public Object remove(Object key) |
| { |
| return super.remove(toCanonicalKey(key)); |
| } |
| |
| /** |
| * This method clears the entire property list such that it no longer |
| * contains the properties used to look up the services provided by |
| * the <code>Provider</code>. |
| */ |
| public void clear() |
| { |
| super.clear(); |
| } |
| |
| /** |
| * This method returns a <code>String</code> representation of this |
| * object. This will include the <code>Provider</code> name and |
| * version number. |
| * |
| * @return A <code>String</code> representation of this object. |
| */ |
| public String toString() |
| { |
| return (getClass().getName() + ": name=" + getName() + " version=" + |
| version); |
| } |
| |
| private Object toCanonicalKey(Object key) |
| { |
| if (key.getClass().isAssignableFrom(String.class)) // is it ours? |
| return ((String) key).toUpperCase(); // use default locale |
| else |
| return key; |
| } |
| } |