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Authorization
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org.osgi.service.useradmin</FONT>
<BR>
Interface Authorization</H2>
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<DL>
<DT><PRE>public interface <B>Authorization</B></DL>
</PRE>
<P>
The <code>Authorization</code> interface encapsulates an authorization context on
which bundles can base authorization decisions, where appropriate.
<p>
Bundles associate the privilege to access restricted resources or operations
with roles. Before granting access to a restricted resource or operation, a
bundle will check if the <code>Authorization</code> object passed to it possess
the required role, by calling its <code>hasRole</code> method.
<p>
Authorization contexts are instantiated by calling the
<A HREF="../../../../org/osgi/service/useradmin/UserAdmin.html#getAuthorization(org.osgi.service.useradmin.User)"><CODE>UserAdmin.getAuthorization(User)</CODE></A> method.
<p>
<i>Trusting Authorization objects </i>
<p>
There are no restrictions regarding the creation of <code>Authorization</code>
objects. Hence, a service must only accept <code>Authorization</code> objects from
bundles that has been authorized to use the service using code based (or Java
2) permissions.
<p>
In some cases it is useful to use <code>ServicePermission</code> to do the code
based access control. A service basing user access control on
<code>Authorization</code> objects passed to it, will then require that a calling
bundle has the <code>ServicePermission</code> to get the service in question. This
is the most convenient way. The OSGi environment will do the code based
permission check when the calling bundle attempts to get the service from the
service registry.
<p>
Example: A servlet using a service on a user's behalf. The bundle with the
servlet must be given the <code>ServicePermission</code> to get the Http Service.
<p>
However, in some cases the code based permission checks need to be more
fine-grained. A service might allow all bundles to get it, but require
certain code based permissions for some of its methods.
<p>
Example: A servlet using a service on a user's behalf, where some service
functionality is open to anyone, and some is restricted by code based
permissions. When a restricted method is called (e.g., one handing over an
<code>Authorization</code> object), the service explicitly checks that the calling
bundle has permission to make the call.
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<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/useradmin/Authorization.html#getName()">getName</A></B>()</CODE>
<BR>
Gets the name of the <A HREF="../../../../org/osgi/service/useradmin/User.html" title="interface in org.osgi.service.useradmin"><CODE>User</CODE></A> that this <code>Authorization</code>
context was created for.</TD>
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<CODE> java.lang.String[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/useradmin/Authorization.html#getRoles()">getRoles</A></B>()</CODE>
<BR>
Gets the names of all roles implied by this <code>Authorization</code>
context.</TD>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/useradmin/Authorization.html#hasRole(java.lang.String)">hasRole</A></B>(java.lang.String name)</CODE>
<BR>
Checks if the role with the specified name is implied by this
<code>Authorization</code> context.</TD>
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<A NAME="getName()"><!-- --></A><H3>
getName</H3>
<PRE>
java.lang.String <B>getName</B>()</PRE>
<DL>
<DD>Gets the name of the <A HREF="../../../../org/osgi/service/useradmin/User.html" title="interface in org.osgi.service.useradmin"><CODE>User</CODE></A> that this <code>Authorization</code>
context was created for.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>The name of the <A HREF="../../../../org/osgi/service/useradmin/User.html" title="interface in org.osgi.service.useradmin"><CODE>User</CODE></A> object that this
<code>Authorization</code> context was created for, or
<code>null</code> if no user was specified when this
<code>Authorization</code> context was created.</DL>
</DD>
</DL>
<HR>
<A NAME="hasRole(java.lang.String)"><!-- --></A><H3>
hasRole</H3>
<PRE>
boolean <B>hasRole</B>(java.lang.String name)</PRE>
<DL>
<DD>Checks if the role with the specified name is implied by this
<code>Authorization</code> context.
<p>
Bundles must define globally unique role names that are associated with
the privilege of accessing restricted resources or operations. Operators
will grant users access to these resources, by creating a <A HREF="../../../../org/osgi/service/useradmin/Group.html" title="interface in org.osgi.service.useradmin"><CODE>Group</CODE></A>
object for each role and adding <A HREF="../../../../org/osgi/service/useradmin/User.html" title="interface in org.osgi.service.useradmin"><CODE>User</CODE></A> objects to it.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - The name of the role to check for.
<DT><B>Returns:</B><DD><code>true</code> if this <code>Authorization</code> context implies
the specified role, otherwise <code>false</code>.</DL>
</DD>
</DL>
<HR>
<A NAME="getRoles()"><!-- --></A><H3>
getRoles</H3>
<PRE>
java.lang.String[] <B>getRoles</B>()</PRE>
<DL>
<DD>Gets the names of all roles implied by this <code>Authorization</code>
context.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>The names of all roles implied by this
<code>Authorization</code> context, or <code>null</code> if no roles
are in the context. The predefined role <code>user.anyone</code>
will not be included in this list.</DL>
</DD>
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