/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation.
* 06/16/2015-2.7 Tomas Kraus
* - 254437: Added default value support.
******************************************************************************/
package org.eclipse.persistence.internal.security;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* INTERNAL:
* Retrieve {@link System} property with privileges enabled.
*/
public class PrivilegedGetSystemProperty implements PrivilegedAction<String> {
/** The name of the {@link System} property. */
private final String key;
/** A default value of the {@link System} property. */
private final String def;
/**
* INTERNAL:
* Creates an instance of {@link System} property getter with privileges enabled.
* Selects {@link System} property getter without default value to be executed so getter will return {@code null}
* if property with {@code key} does not exist.
* @param key The name of the {@link System} property.
*/
public PrivilegedGetSystemProperty(final String key) {
this.key = key;
this.def = null;
}
/**
* INTERNAL:
* Creates an instance of {@link System} property getter with privileges enabled.
* Selects {@link System} property getter with default value to be executed so getter will return {@code def}
* if property with {@code key} does not exist.
* @param key The name of the {@link System} property.
* @since 2.7
*/
public PrivilegedGetSystemProperty(final String key, final String def) {
this.key = key;
this.def = def;
}
/**
* INTERNAL:
* Performs {@link System} property retrieval.
* This method will be called by {@link AccessController#doPrivileged(PrivilegedAction)} after enabling privileges.
* @return The {@link String} value of the system property.
*/
@Override
public String run() {
return def != null ? System.getProperty(key, def) : System.getProperty(key);
}
}