[multiple changes]

2005-04-25  Archie Cobbs  <archie@dellroad.org>

	* java/lang/Throwable.java: simplify initializing cause in constructor

2005-04-25  Michael Koch  <konqueror@gmx.de>

	* gnu/classpath/SystemProperties.java: New file.
	* gnu/classpath/natSystemProperties.cc: New file.
	* java/lang/Runtime.java
	(defaultProperties): Removed.
	(static): Likewise.
	(): Made thrown exceptions more verbose.
	(insertSystemProperties): Removed.
	* java/lang/System.java
	(static): Likewise.
	(properties): Likewise.
	(setSecurityManager): Reordered modifiers.
	(getenv): Improved javadoc.
	(): Likewise.
	(isWordsBigEndian): Removed.
	* java/lang/natRuntime.cc
	(_Jv_SetDLLSearchPath): Likewise.
	(file_encoding): Likewise.
	(default_file_encoding): Likewise.
	(getpwuid_adaptor): Likewise.
	(insertSystemProperties): Likewise.
	* java/lang/natSystem.cc
	(isWordsBigEndian): Likewise.
	* Makefile.am
	(ordinary_java_source_files):
	Added gnu/classpath/SystemProperties.java.
	(nat_source_files): Added gnu/classpath/natSystemProperties.cc.
	* Makefile.in: Regenerated.

From-SVN: r98734

libjava/gnu/classpath/SystemProperties.java

@@ -0,0 +1,154 @@
+/* SystemProperties.java -- Manage the System properties.
+   Copyright (C) 2004, 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath;
+
+import java.util.Properties;
+
+/**
+ * The class manages the System properties. This class is only available to
+ * privileged code (i.e. code loaded by the bootstrap class loader) and
+ * therefore doesn't do any security checks.
+ * This class is separated out from java.lang.System to simplify bootstrap
+ * dependencies and to allow trusted code a simple and efficient mechanism
+ * to access the system properties.
+ */
+public class SystemProperties
+{
+  /**
+   * Stores the current system properties. This can be modified by
+   * {@link #setProperties(Properties)}, but will never be null, because
+   * setProperties(null) sucks in the default properties.
+   */
+  private static Properties properties;
+
+  /**
+   * The default properties. Once the default is stabilized,
+   * it should not be modified;
+   * instead it is cloned when calling <code>setProperties(null)</code>.
+   */
+  private static final Properties defaultProperties = new Properties();
+
+  private static native void insertSystemProperties(Properties properties);
+
+  static
+  {
+    insertSystemProperties(defaultProperties);
+
+    // Set base URL if not already set.
+    if (defaultProperties.get("gnu.classpath.home.url") == null)
+      defaultProperties.put("gnu.classpath.home.url",
+			    "file://"
+			    + defaultProperties.get("gnu.classpath.home")
+	                    + "/lib");
+
+    // Set short name if not already set.
+    if (defaultProperties.get("gnu.classpath.vm.shortname") == null)
+      {
+	String value = defaultProperties.getProperty("java.vm.name");
+	int index = value.lastIndexOf(' ');
+	if (index != -1)
+	  value = value.substring(index + 1);
+	defaultProperties.put("gnu.classpath.vm.shortname", value);
+      }
+
+    // Network properties
+    if (defaultProperties.get("http.agent") == null)
+      {
+	String userAgent = ("gnu-classpath/"
+	                    + defaultProperties.getProperty("gnu.classpath.version")
+	                    + " ("
+	                    + defaultProperties.getProperty("gnu.classpath.vm.shortname")
+	                    + "/"
+	                    + defaultProperties.getProperty("java.vm.version")
+	                    + ")");
+	 defaultProperties.put("http.agent", userAgent);
+      }
+
+    defaultProperties.put("gnu.cpu.endian",
+			  isWordsBigEndian() ? "big" : "little");
+
+    // XXX FIXME - Temp hack for old systems that set the wrong property
+    if (defaultProperties.get("java.io.tmpdir") == null)
+      defaultProperties.put("java.io.tmpdir",
+                            defaultProperties.get("java.tmpdir"));
+
+    // Note that we use clone here and not new.  Some programs assume
+    // that the system properties do not have a parent.
+    properties = (Properties) defaultProperties.clone();
+  }
+
+  public static String getProperty(String name)
+  {
+    return properties.getProperty(name);
+  }
+
+  public static String getProperty(String name, String defaultValue)
+  {
+    return properties.getProperty(name, defaultValue);
+  }
+
+  public static String setProperty(String name, String value)
+  {
+    return (String) properties.setProperty(name, value);
+  }
+
+  public static Properties getProperties()
+  {
+    return properties;
+  }
+
+  public static void setProperties(Properties properties)
+  {
+    if (properties == null)
+      {
+        // Note that we use clone here and not new.  Some programs
+        // assume that the system properties do not have a parent.
+        properties = (Properties)defaultProperties.clone();
+      }
+
+    SystemProperties.properties = properties;
+  }
+
+  /**
+   * Detect big-endian systems.
+   *
+   * @return true if the system is big-endian.
+   */
+  private static native boolean isWordsBigEndian();
+}