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// **********************************************************************
//
// Copyright (c) 2003-2011 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
package IceInternal;
public final class Util
{
public static Instance
getInstance(Ice.Communicator communicator)
{
Ice.CommunicatorI p = (Ice.CommunicatorI)communicator;
return p.getInstance();
}
public static ProtocolPluginFacade
getProtocolPluginFacade(Ice.Communicator communicator)
{
return new ProtocolPluginFacadeI(communicator);
}
//
// Given a path name, first try to open it as a class path resource (the path is
// treated as absolute). If that fails, fall back to the file system. Returns null
// if the file does not exist and raises IOException if an error occurs.
//
public static java.io.InputStream
openResource(ClassLoader cl, String path)
throws java.io.IOException
{
//
// Calling getResourceAsStream on the class loader means all paths are absolute,
// whereas calling it on the class means all paths are relative to the class
// unless the path has a leading forward slash. We call it on the class loader.
//
// getResourceAsStream returns null if the resource can't be found.
//
java.io.InputStream stream = cl.getResourceAsStream(path);
if(stream == null)
{
try
{
java.io.File f = new java.io.File(path);
if(f.exists())
{
stream = new java.io.FileInputStream(f);
}
}
catch(java.lang.SecurityException ex)
{
// Ignore - a security manager may forbid access to the local file system.
}
}
return stream;
}
public static Class<?>
findClass(String className, ClassLoader cl)
throws LinkageError
{
//
// Try to load the class using the given class loader (if any). If that fails (or
// none is provided), we try to load the class a few more ways before giving up.
//
// Calling Class.forName() doesn't always work. For example, if Ice.jar is installed
// as an extension (in $JAVA_HOME/jre/lib/ext), calling Class.forName(name) uses the
// extension class loader, which will not look in CLASSPATH for the target class.
//
Class<?> c = null;
if(cl != null)
{
c = loadClass(className, cl);
}
//
// Try using the system class loader (which knows about CLASSPATH).
//
if(c == null)
{
try
{
cl = ClassLoader.getSystemClassLoader();
if(cl != null)
{
c = loadClass(className, cl);
}
}
catch(SecurityException ex)
{
}
}
//
// Try using the current thread's class loader.
//
if(c == null)
{
try
{
cl = Thread.currentThread().getContextClassLoader();
if(cl != null)
{
c = loadClass(className, cl);
}
}
catch(SecurityException ex)
{
}
}
//
// Fall back to Class.forName().
//
try
{
if(c == null)
{
c = Class.forName(className);
}
}
catch(ClassNotFoundException ex)
{
// Ignore
}
return c;
}
private static Class<?>
loadClass(String className, ClassLoader cl)
throws LinkageError
{
if(cl != null)
{
try
{
return cl.loadClass(className);
}
catch(ClassNotFoundException ex)
{
// Ignore
}
}
return null;
}
public static int
getThreadPriorityProperty(Ice.Properties properties, String prefix)
{
String pri = properties.getProperty(prefix + ".ThreadPriority");
if(pri.equals("MIN_PRIORITY") || pri.equals("java.lang.Thread.MIN_PRIORITY"))
{
return java.lang.Thread.MIN_PRIORITY;
}
else if(pri.equals("NORM_PRIORITY") || pri.equals("java.lang.Thread.NORM_PRIORITY"))
{
return java.lang.Thread.NORM_PRIORITY;
}
else if(pri.equals("MAX_PRIORITY") || pri.equals("java.lang.Thread.MAX_PRIORITY"))
{
return java.lang.Thread.MAX_PRIORITY;
}
try
{
return Integer.parseInt(pri);
}
catch(NumberFormatException ex)
{
}
return java.lang.Thread.NORM_PRIORITY;
}
}
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