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java.lang.Objectcom.jivesoftware.util.ClassUtils
public class ClassUtils
A utility class to assist with loading classes or resources by name. Many application servers use custom classloaders, which will break uses of:
Class.forName(className);This utility attempts to load the class or resource using a number of different mechanisms to work around this problem.
Method Summary | |
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static java.lang.Class |
forName(java.lang.String className)
Loads the class with the specified name. |
static java.net.URL |
getResource(java.lang.String resourceName,
java.lang.Class callingClass)
Load a given resource. |
static java.io.InputStream |
getResourceAsStream(java.lang.String name)
Loads the given resource as a stream. |
static java.io.InputStream |
getResourceAsStream(java.lang.String resourceName,
java.lang.Class callingClass)
This is a convenience method to load a resource as a stream. |
static java.lang.Class |
loadClass(java.lang.String className,
java.lang.Class callingClass)
Load a class with a given name. |
static java.lang.Object |
newInstance(java.lang.String className)
Creates a new instance of the class with the specified name. |
static void |
propertiesLoaded()
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static byte[] |
readStream(java.io.InputStream in,
int size)
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Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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public static java.lang.Class forName(java.lang.String className) throws java.lang.ClassNotFoundException
className
- the name of the class
Class
object
java.lang.ClassNotFoundException
- if the class was not foundpublic static java.lang.Object newInstance(java.lang.String className) throws java.lang.ClassNotFoundException, java.lang.IllegalAccessException, java.lang.InstantiationException
className
- The name of the class
java.lang.ClassNotFoundException
- If class cannot be found.
java.lang.IllegalAccessException
- If caller cannot access the class.
java.lang.InstantiationException
- If class instantiation fails.public static java.io.InputStream getResourceAsStream(java.lang.String name)
name
- the name of the resource that exists in the classpath.
public static void propertiesLoaded()
public static java.lang.Class loadClass(java.lang.String className, java.lang.Class callingClass) throws java.lang.ClassNotFoundException
Thread.currentThread().getContextClassLoader()
Class.forName(String)
ClassLoaderUtil.class.getClassLoader()
callingClass.getClassLoader()
className
- The name of the class to loadcallingClass
- The Class object of the calling object
java.lang.ClassNotFoundException
- If the class cannot be found anywhere.public static java.net.URL getResource(java.lang.String resourceName, java.lang.Class callingClass)
Thread.currentThread().getContextClassLoader()
ClassLoaderUtil.class.getClassLoader()
callingClass.getClassLoader()
resourceName
- The name of the resource to loadcallingClass
- The Class object of the calling objectpublic static java.io.InputStream getResourceAsStream(java.lang.String resourceName, java.lang.Class callingClass)
resourceName
- The name of the resource to loadcallingClass
- The Class object of the calling objectpublic static byte[] readStream(java.io.InputStream in, int size) throws java.io.IOException
java.io.IOException
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