/*
* Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package jdk.xml.internal;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.text.MessageFormat;
import java.util.Locale;
import java.util.Properties;
import java.util.ResourceBundle;
/**
* This class contains utility methods for reading resources in the JAXP packages
*/
public class SecuritySupport {
/**
* Cache for properties in java.home/conf/jaxp.properties
*/
static final Properties cacheProps = new Properties();
/**
* Flag indicating whether java.home/conf/jaxp.properties has been read
*/
static volatile boolean firstTime = true;
private SecuritySupport() {}
public static String getErrorMessage(Locale locale, String bundle, String key,
Object[] arguments) {
ResourceBundle rb;
if (locale != null) {
rb = ResourceBundle.getBundle(bundle,locale);
} else {
rb = ResourceBundle.getBundle(bundle);
}
String msg = rb.getString(key);
if (arguments != null) {
msg = MessageFormat.format(msg, arguments);
}
return msg;
}
/**
* Reads JAXP system property with privilege
*
* @param propName the name of the property
* @return the value of the property
*/
public static String getSystemProperty(final String propName) {
return
AccessController.doPrivileged(
(PrivilegedAction<String>) () -> (String)System.getProperty(propName));
}
/**
* Reads a system property.
*
* @param <T> the type of the property value
* @param type the type of the property value
* @param propName the name of the property
* @param defValue the default value
* @return the value of the property, or the default value of no system
* property is found
*/
public static <T> T getJAXPSystemProperty(Class<T> type, String propName, String defValue) {
String value = getJAXPSystemProperty(propName);
if (value == null) {
value = defValue;
}
if (Integer.class.isAssignableFrom(type)) {
return type.cast(Integer.parseInt(value));
} else if (Boolean.class.isAssignableFrom(type)) {
return type.cast(Boolean.parseBoolean(value));
}
return type.cast(value);
}
/**
* Reads JAXP system property in this order: system property,
* $java.home/conf/jaxp.properties if the system property is not specified
*
* @param propName the name of the property
* @return the value of the property
*/
public static String getJAXPSystemProperty(String propName) {
String value = getSystemProperty(propName);
if (value == null) {
value = readJAXPProperty(propName);
}
return value;
}
/**
* Reads the specified property from $java.home/conf/jaxp.properties
*
* @param propName the name of the property
* @return the value of the property
*/
public static String readJAXPProperty(String propName) {
String value = null;
InputStream is = null;
try {
if (firstTime) {
synchronized (cacheProps) {
if (firstTime) {
String configFile = getSystemProperty("java.home") + File.separator
+ "conf" + File.separator + "jaxp.properties";
File f = new File(configFile);
if (getFileExists(f)) {
is = getFileInputStream(f);
cacheProps.load(is);
}
firstTime = false;
}
}
}
value = cacheProps.getProperty(propName);
} catch (IOException ex) {
} finally {
if (is != null) {
try {
is.close();
} catch (IOException ex) {}
}
}
return value;
}
//------------------- private methods ---------------------------
static boolean getFileExists(final File f) {
return (AccessController.doPrivileged((PrivilegedAction<Boolean>) ()
-> f.exists() ? Boolean.TRUE : Boolean.FALSE));
}
static FileInputStream getFileInputStream(final File file)
throws FileNotFoundException {
try {
return AccessController.doPrivileged((PrivilegedExceptionAction<FileInputStream>) ()
-> new FileInputStream(file));
} catch (PrivilegedActionException e) {
throw (FileNotFoundException) e.getException();
}
}
}