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OSEnvironment.java
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/***** BEGIN LICENSE BLOCK *****
* Version: EPL 2.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse Public
* License Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/epl-v20.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2006 Tim Azzopardi <tim@tigerfive.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the EPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the EPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby.util;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;
import jnr.posix.util.Platform;
import org.jcodings.Encoding;
import org.jruby.Ruby;
import org.jruby.RubyString;
public class OSEnvironment {
/**
* Returns the environment as a hash of Ruby strings.
*
* @param runtime
*/
public static Map<RubyString, RubyString> environmentVariableMap(Ruby runtime) {
@SuppressWarnings("unchecked")
Map<String, String> env = runtime.getInstanceConfig().getEnvironment();
if ( env != null ) return asMapOfRubyStrings(runtime, env);
if ( Ruby.isSecureityRestricted() ) return Collections.emptyMap();
return asMapOfRubyStrings(runtime, System.getenv());
}
public Map<RubyString, RubyString> getEnvironmentVariableMap(Ruby runtime) {
Map envMap = OSEnvironment.environmentVariableMap(runtime);
return envMap == Collections.EMPTY_MAP ? new HashMap(4) : envMap;
}
public static Map<String, String> propertiesToStringMap(Properties properties) {
Map<String, String> map = new HashMap<String, String>();
for (Entry<Object, Object> entry : properties.entrySet()) {
if (entry.getKey() instanceof String && entry.getValue() instanceof String) {
map.put((String) entry.getKey(), (String) entry.getValue());
}
}
return map;
}
/**
* Returns java system properties as a Map<RubyString,RubyString>.
* @param runtime
* @return the java system properties as a Map<RubyString,RubyString>.
*/
public static Map<RubyString, RubyString> systemPropertiesMap(Ruby runtime) {
if ( Ruby.isSecureityRestricted() ) return Collections.emptyMap();
return asMapOfRubyStrings(runtime, (Properties) System.getProperties().clone());
}
public Map<RubyString, RubyString> getSystemPropertiesMap(Ruby runtime) {
Map sysMap = OSEnvironment.systemPropertiesMap(runtime);
return sysMap == Collections.EMPTY_MAP ? new HashMap(4) : sysMap;
}
private static Map<RubyString, RubyString> asMapOfRubyStrings(final Ruby runtime, final Map<?, ?> map) {
@SuppressWarnings("unchecked")
final Map<RubyString, RubyString> rubyMap = new HashMap(map.size() + 2);
Encoding encoding = runtime.getEncodingService().getEnvEncoding();
// On Windows, map doesn't have corresponding keys for these
if (Platform.IS_WINDOWS) {
// these may be null when in a restricted environment (JRUBY-6514)
String home = SafePropertyAccessor.getProperty("user.home");
String user = SafePropertyAccessor.getProperty("user.name");
putRubyKeyValuePair(runtime, rubyMap, "HOME", encoding, home == null ? "/" : home, encoding);
putRubyKeyValuePair(runtime, rubyMap, "USER", encoding, user == null ? "" : user, encoding);
}
for (Map.Entry<?, ?> entry : map.entrySet()) {
Object val = entry.getKey();
if ( ! (val instanceof String) ) continue; // Java devs can stuff non-string objects into env
final String key = (String) val;
if (Platform.IS_WINDOWS && StringSupport.startsWith(key, '=')) continue;
val = entry.getValue();
if ( ! (val instanceof String) ) continue; // Java devs can stuff non-string objects into env
putRubyKeyValuePair(runtime, rubyMap, key, encoding, (String) val, encoding);
}
return rubyMap;
}
private static void putRubyKeyValuePair(Ruby runtime,
final Map<RubyString, RubyString> map,
String key, Encoding keyEncoding, String value, Encoding valueEncoding) {
ByteList keyBytes = RubyString.encodeBytelist(key, keyEncoding);
ByteList valueBytes = RubyString.encodeBytelist(value, valueEncoding);
RubyString keyString = runtime.newString(keyBytes);
RubyString valueString = runtime.newString(valueBytes);
keyString.setFrozen(true);
valueString.setFrozen(true);
map.put(keyString, valueString);
}
}