org.xml.sax.helpers
class: NewInstance [javadoc |
source]
java.lang.Object
org.xml.sax.helpers.NewInstance
Create a new instance of a class by name.
This module, both source code and documentation, is in the
Public Domain, and comes with NO WARRANTY.
See http://www.saxproject.org
for further information.
This class contains a static method for creating an instance of a
class from an explicit class name. It tries to use the thread's context
ClassLoader if possible and falls back to using
Class.forName(String).
This code is designed to compile and run on JDK version 1.1 and later
including versions of Java 2.
- author:
Edwin - Goei, David Brownell
| Method from org.xml.sax.helpers.NewInstance Detail: |
|---|
 static ClassLoader getClassLoader() {
Method m = null;
try {
m = Thread.class.getMethod("getContextClassLoader", (Class[]) null);
} catch (NoSuchMethodException e) {
// Assume that we are running JDK 1.1, use the current ClassLoader
return NewInstance.class.getClassLoader();
}
try {
return (ClassLoader) m.invoke(Thread.currentThread(), (Object[]) null);
} catch (IllegalAccessException e) {
// assert(false)
throw new UnknownError(e.getMessage());
} catch (InvocationTargetException e) {
// assert(e.getTargetException() instanceof SecurityException)
throw new UnknownError(e.getMessage());
}
}
Figure out which ClassLoader to use. For JDK 1.2 and later use
the context ClassLoader. |
static Object newInstance(ClassLoader classLoader,
String className) throws ClassNotFoundException, InstantiationException, IllegalAccessException {
Class driverClass;
if (classLoader == null) {
driverClass = Class.forName(className);
} else {
driverClass = classLoader.loadClass(className);
}
return driverClass.newInstance();
} Creates a new instance of the specified class name
Package private so this code is not exposed at the API level. |
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