/*
* Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
package java.security;
import java.util.*;
import java.io.ObjectStreamField;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import java.io.IOException;
/**
* A UnresolvedPermissionCollection stores a collection
* of UnresolvedPermission permissions.
*
* @see java.security.Permission
* @see java.security.Permissions
* @see java.security.UnresolvedPermission
*
*
* @author Roland Schemers
*
* @serial include
*/
final class UnresolvedPermissionCollection
extends PermissionCollection
implements java.io.Serializable
{
/**
* Key is permission type, value is a list of the UnresolvedPermissions
* of the same type.
* Not serialized; see serialization section at end of class.
*/
private transient Map<String, List<UnresolvedPermission>> perms;
/**
* Create an empty UnresolvedPermissionCollection object.
*
*/
public UnresolvedPermissionCollection() {
perms = new HashMap<String, List<UnresolvedPermission>>(11);
}
/**
* Adds a permission to this UnresolvedPermissionCollection.
* The key for the hash is the unresolved permission's type (class) name.
*
* @param permission the Permission object to add.
*/
public void add(Permission permission)
{
if (! (permission instanceof UnresolvedPermission))
throw new IllegalArgumentException("invalid permission: "+
permission);
UnresolvedPermission up = (UnresolvedPermission) permission;
List<UnresolvedPermission> v;
synchronized (this) {
v = perms.get(up.getName());
if (v == null) {
v = new ArrayList<UnresolvedPermission>();
perms.put(up.getName(), v);
}
}
synchronized (v) {
v.add(up);
}
}
/**
* get any unresolved permissions of the same type as p,
* and return the List containing them.
*/
List<UnresolvedPermission> getUnresolvedPermissions(Permission p) {
synchronized (this) {
return perms.get(p.getClass().getName());
}
}
/**
* always returns false for unresolved permissions
*
*/
public boolean implies(Permission permission)
{
return false;
}
/**
* Returns an enumeration of all the UnresolvedPermission lists in the
* container.
*
* @return an enumeration of all the UnresolvedPermission objects.
*/
public Enumeration<Permission> elements() {
List<Permission> results =
new ArrayList<Permission>(); // where results are stored
// Get iterator of Map values (which are lists of permissions)
synchronized (this) {
for (List<UnresolvedPermission> l : perms.values()) {
synchronized (l) {
results.addAll(l);
}
}
}
return Collections.enumeration(results);
}
private static final long serialVersionUID = -7176153071733132400L;
// Need to maintain serialization interoperability with earlier releases,
// which had the serializable field:
// private Hashtable permissions; // keyed on type
/**
* @serialField permissions java.util.Hashtable
* A table of the UnresolvedPermissions keyed on type, value is Vector
* of permissions
*/
private static final ObjectStreamField[] serialPersistentFields = {
new ObjectStreamField("permissions", Hashtable.class),
};
/**
* @serialData Default field.
*/
/*
* Writes the contents of the perms field out as a Hashtable
* in which the values are Vectors for
* serialization compatibility with earlier releases.
*/
private void writeObject(ObjectOutputStream out) throws IOException {
// Don't call out.defaultWriteObject()
// Copy perms into a Hashtable
Hashtable<String, Vector<UnresolvedPermission>> permissions =
new Hashtable<String, Vector<UnresolvedPermission>>(perms.size()*2);
// Convert each entry (List) into a Vector
synchronized (this) {
Set<Map.Entry<String, List<UnresolvedPermission>>> set = perms.entrySet();
for (Map.Entry<String, List<UnresolvedPermission>> e : set) {
// Convert list into Vector
List<UnresolvedPermission> list = e.getValue();
Vector<UnresolvedPermission> vec =
new Vector<UnresolvedPermission>(list.size());
synchronized (list) {
vec.addAll(list);
}
// Add to Hashtable being serialized
permissions.put(e.getKey(), vec);
}
}
// Write out serializable fields
ObjectOutputStream.PutField pfields = out.putFields();
pfields.put("permissions", permissions);
out.writeFields();
}
/*
* Reads in a Hashtable in which the values are Vectors of
* UnresolvedPermissions and saves them in the perms field.
*/
private void readObject(ObjectInputStream in) throws IOException,
ClassNotFoundException {
// Don't call defaultReadObject()
// Read in serialized fields
ObjectInputStream.GetField gfields = in.readFields();
// Get permissions
Hashtable<String, Vector<UnresolvedPermission>> permissions =
(Hashtable<String, Vector<UnresolvedPermission>>)gfields.get("permissions", null);
perms = new HashMap<String, List<UnresolvedPermission>>(permissions.size()*2);
// Convert each entry (Vector) into a List
Set<Map.Entry<String, Vector<UnresolvedPermission>>> set = permissions.entrySet();
for (Map.Entry<String, Vector<UnresolvedPermission>> e : set) {
// Convert Vector into ArrayList
Vector<UnresolvedPermission> vec = e.getValue();
List<UnresolvedPermission> list =
new ArrayList<UnresolvedPermission>(vec.size());
list.addAll(vec);
// Add to Hashtable being serialized
perms.put(e.getKey(), list);
}
}
}