package org.infinispan.client.hotrod.impl.transport.netty;

import java.security.AccessController;
import java.security.PrivilegedAction;

/**
 * Privileged actions for package org.infinispan.client.hotrod.impl.transport.netty
 *
 * Do not move. Do not change class and method visibility to avoid being called from other
 * {@link java.security.CodeSource}s, thus granting privilege escalation to external code.
 *
 * @author Scott.Stark@jboss.org
 * @since 4.2
 */
final class SecurityActions {

   interface SysProps {

      SysProps NON_PRIVILEGED = new SysProps() {
         @Override
         public String getProperty(final String name, final String defaultValue) {
            return System.getProperty(name, defaultValue);
         }

         @Override
         public String getProperty(final String name) {
            return System.getProperty(name);
         }

         @Override
         public String setProperty(String name, String value) {
            return System.setProperty(name, value);
         }
      };

      SysProps PRIVILEGED = new SysProps() {
         @Override
         public String getProperty(final String name, final String defaultValue) {
            PrivilegedAction<String> action = new PrivilegedAction<String>() {
               @Override
               public String run() {
                  return System.getProperty(name, defaultValue);
               }
            };
            return AccessController.doPrivileged(action);
         }

         @Override
         public String getProperty(final String name) {
            PrivilegedAction<String> action = new PrivilegedAction<String>() {
               @Override
               public String run() {
                  return System.getProperty(name);
               }
            };
            return AccessController.doPrivileged(action);
         }

         @Override
         public String setProperty(final String name, final String value) {
            PrivilegedAction<String> action = new PrivilegedAction<String>() {
               @Override
               public String run() {
                  return System.setProperty(name, value);
               }
            };
            return AccessController.doPrivileged(action);
         }
      };

      String getProperty(String name, String defaultValue);

      String getProperty(String name);

      String setProperty(String name, String value);
   }

   static String getProperty(String name, String defaultValue) {
      if (System.getSecurityManager() == null)
         return SysProps.NON_PRIVILEGED.getProperty(name, defaultValue);

      return SysProps.PRIVILEGED.getProperty(name, defaultValue);
   }

   static int getIntProperty(String name, int defaultValue) {
      String value = getProperty(name);
      if (value != null) {
         try {
            return Integer.parseInt(value);
         } catch (NumberFormatException e) {
            // noop
         }
      }
      return defaultValue;
   }

   static String getProperty(String name) {
      if (System.getSecurityManager() == null)
         return SysProps.NON_PRIVILEGED.getProperty(name);

      return SysProps.PRIVILEGED.getProperty(name);
   }

   static String setProperty(String name, String value) {
      if (System.getSecurityManager() == null) {
         return SysProps.NON_PRIVILEGED.setProperty(name, value);
      } else {
         return SysProps.PRIVILEGED.setProperty(name, value);
      }

   }
}
