| /* Provider.java -- Security provider information |
| Copyright (C) 1998, 1999, 2000, 2002, 2006 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., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 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. See the static |
| * initializer of the {@link java.security.Security} class for the default |
| * security providers installed by this class library. |
| * |
| * @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); |
| } |
| |
| /** |
| * Maps a key property to a designated value. |
| * <p> |
| * If there is an installed {@link SecurityManager} object in the underlying |
| * VM, its {@link SecurityManager#checkSecurityAccess(String)} method is |
| * called with the string <code>"putProviderProperty." + name</code>, where |
| * <code>name</code> is this provider's name. For the default implementation |
| * this translates into a {@link SecurityManager#checkPermission(Permission)} |
| * for a <code>SecurityPermission("putProviderProperty." + name)</code>. |
| * |
| * @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 is installed and its |
| * {@link SecurityManager#checkSecurityAccess(String)} method |
| * disallows adding properties at run-time. |
| * @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) |
| { |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) |
| sm.checkSecurityAccess("putProviderProperty." + this.name); |
| 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 collection. |
| * <p> |
| * If there is an installed {@link SecurityManager} object in the underlying |
| * VM, its {@link SecurityManager#checkSecurityAccess(String)} method is |
| * called with the string <code>"removeProviderProperty." + name</code>, where |
| * <code>name</code> is this provider's name. For the default implementation |
| * this translates into a {@link SecurityManager#checkPermission(Permission)} |
| * for a <code>SecurityPermission("removeProviderProperty." + name)</code>. |
| * |
| * @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) |
| { |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) |
| sm.checkSecurityAccess("removeProviderProperty." + this.name); |
| return super.remove(toCanonicalKey(key)); |
| } |
| |
| /** |
| * This method clears the entire property collection such that it no longer |
| * contains the properties used to look up the services provided by |
| * this <code>Provider</code>. |
| * <p> |
| * If there is an installed {@link SecurityManager} object in the underlying |
| * VM, its {@link SecurityManager#checkSecurityAccess(String)} method is |
| * called with the string <code>"clearProviderProperties." + name</code>, |
| * where <code>name</code> is this provider's name. For the default |
| * implementation this translates into a |
| * {@link SecurityManager#checkPermission(Permission)} for a |
| * <code>SecurityPermission("clearProviderProperties." + name)</code>. |
| */ |
| public void clear() |
| { |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) |
| sm.checkSecurityAccess("clearProviderProperties." + this.name); |
| 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 |
| return key; |
| } |
| } |