001: /*
002: * Copyright (c) 2003 The Visigoth Software Society. All rights
003: * reserved.
004: *
005: * Redistribution and use in source and binary forms, with or without
006: * modification, are permitted provided that the following conditions
007: * are met:
008: *
009: * 1. Redistributions of source code must retain the above copyright
010: * notice, this list of conditions and the following disclaimer.
011: *
012: * 2. Redistributions in binary form must reproduce the above copyright
013: * notice, this list of conditions and the following disclaimer in
014: * the documentation and/or other materials provided with the
015: * distribution.
016: *
017: * 3. The end-user documentation included with the redistribution, if
018: * any, must include the following acknowledgement:
019: * "This product includes software developed by the
020: * Visigoth Software Society (http://www.visigoths.org/)."
021: * Alternately, this acknowledgement may appear in the software itself,
022: * if and wherever such third-party acknowledgements normally appear.
023: *
024: * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
025: * project contributors may be used to endorse or promote products derived
026: * from this software without prior written permission. For written
027: * permission, please contact visigoths@visigoths.org.
028: *
029: * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
030: * nor may "FreeMarker" or "Visigoth" appear in their names
031: * without prior written permission of the Visigoth Software Society.
032: *
033: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
034: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
035: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
036: * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
037: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
038: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
039: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
040: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
041: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
042: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
043: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
044: * SUCH DAMAGE.
045: * ====================================================================
046: *
047: * This software consists of voluntary contributions made by many
048: * individuals on behalf of the Visigoth Software Society. For more
049: * information on the Visigoth Software Society, please see
050: * http://www.visigoths.org/
051: */
052:
053: package freemarker.template.utility;
054:
055: import java.security.AccessControlException;
056: import java.security.AccessController;
057: import java.security.PrivilegedAction;
058:
059: import freemarker.log.Logger;
060:
061: /**
062: * @author Attila Szegedi
063: * @version $Id: SecurityUtilities.java,v 1.2 2004/11/11 13:27:39 szegedia Exp $
064: */
065: public class SecurityUtilities {
066: private static final Logger logger = Logger
067: .getLogger("freemarker.security");
068:
069: private SecurityUtilities() {
070: }
071:
072: public static String getSystemProperty(final String key) {
073: return (String) AccessController
074: .doPrivileged(new PrivilegedAction() {
075: public Object run() {
076: return System.getProperty(key);
077: }
078: });
079: }
080:
081: public static String getSystemProperty(final String key,
082: final String defValue) {
083: try {
084: return (String) AccessController
085: .doPrivileged(new PrivilegedAction() {
086: public Object run() {
087: return System.getProperty(key, defValue);
088: }
089: });
090: } catch (AccessControlException e) {
091: logger
092: .warn("Insufficient permissions to read system property '"
093: + key
094: + "', using default value '"
095: + defValue + "'");
096: return defValue;
097: }
098: }
099:
100: public static Integer getSystemProperty(final String key,
101: final int defValue) {
102: try {
103: return (Integer) AccessController
104: .doPrivileged(new PrivilegedAction() {
105: public Object run() {
106: return Integer.getInteger(key, defValue);
107: }
108: });
109: } catch (AccessControlException e) {
110: logger
111: .warn("Insufficient permissions to read system property '"
112: + key
113: + "', using default value "
114: + defValue + "");
115: return new Integer(defValue);
116: }
117: }
118: }
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