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/*******************************************************************************
* Copyright (c) 2003, 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.p2.testserver;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import org.osgi.framework.Bundle;
/**
* Utility class to execute common privileged code.
*/
public class SecureAction {
// make sure we use the correct controlContext;
private AccessControlContext controlContext;
/**
* Constructs a new SecureAction object. The constructed SecureAction object
* uses the caller's AccessControlContext to perform security checks
*/
public SecureAction() {
// save the control context to be used.
this.controlContext = AccessController.getContext();
}
/**
* Gets a resource from a bundle.
* @param bundle the bundle to get the resource from
* @param name The name of the resource
* @return The URL of the resource
*/
public URL getBundleResource(final Bundle bundle, final String name) {
if (System.getSecurityManager() == null)
return bundle.getResource(name);
return (URL) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
return bundle.getResource(name);
}
}, controlContext);
}
public URLConnection openURL(final URL url) throws IOException {
if (System.getSecurityManager() == null)
return open(url);
try {
return (URLConnection) AccessController.doPrivileged(new PrivilegedExceptionAction() {
public Object run() throws IOException {
return open(url);
}
}, controlContext);
} catch(PrivilegedActionException ex) {
throw (IOException) ex.getException();
}
}
URLConnection open(final URL url)throws IOException
{
URLConnection connection = url.openConnection();
connection.connect(); /* establish connection to check permissions */
return connection;
}
/**
* Returns a system property. Same as calling
* System.getProperty(String,String).
* @param property the property key.
* @param def the default value if the property key does not exist.
* @return the value of the property or the def value if the property
* does not exist.
*/
public String getProperty(final String property, final String def) {
if (System.getSecurityManager() == null)
return System.getProperty(property, def);
return (String) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
return System.getProperty(property, def);
}
}, controlContext);
}
}
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