Class ClassLoaderUtils
- java.lang.Object
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- org.apache.cxf.common.classloader.ClassLoaderUtils
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public final class ClassLoaderUtils extends Object
This class is extremely useful for loading resources and classes in a fault tolerant manner that works across different applications servers. Do not touch this unless you're a grizzled classloading guru veteran who is going to verify any change on 6 different application servers.
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Nested Class Summary
Nested Classes Modifier and Type Class Description static classClassLoaderUtils.ClassLoaderHolder
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static StringgetClassLoaderName(Class<?> type)static URLgetResource(String resourceName, Class<?> callingClass)Load a given resource.static InputStreamgetResourceAsStream(String resourceName, Class<?> callingClass)This is a convenience method to load a resource as a stream.static List<URL>getResources(String resourceName, Class<?> callingClass)Load a given resources.static ClassLoadergetURLClassLoader(URL[] urls, ClassLoader parent)static ClassLoadergetURLClassLoader(List<URL> urlList, ClassLoader parent)static Class<?>loadClass(String className, Class<?> callingClass)Load a class with a given name.static <T> Class<? extends T>loadClass(String className, Class<?> callingClass, Class<T> type)static Class<?>loadClassFromContextLoader(String className)static ClassLoaderUtils.ClassLoaderHoldersetThreadContextClassloader(ClassLoader newLoader)
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Method Detail
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setThreadContextClassloader
public static ClassLoaderUtils.ClassLoaderHolder setThreadContextClassloader(ClassLoader newLoader)
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getURLClassLoader
public static ClassLoader getURLClassLoader(URL[] urls, ClassLoader parent)
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getURLClassLoader
public static ClassLoader getURLClassLoader(List<URL> urlList, ClassLoader parent)
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getResource
public static URL getResource(String resourceName, Class<?> callingClass)
Load a given resource. This method will try to load the resource using the following methods (in order):- From Thread.currentThread().getContextClassLoader()
- From ClassLoaderUtil.class.getClassLoader()
- callingClass.getClassLoader()
- Parameters:
resourceName- The name of the resource to loadcallingClass- The Class object of the calling object
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getResources
public static List<URL> getResources(String resourceName, Class<?> callingClass)
Load a given resources. This method will try to load the resources using the following methods (in order):- From Thread.currentThread().getContextClassLoader()
- From ClassLoaderUtil.class.getClassLoader()
- callingClass.getClassLoader()
- Parameters:
resourceName- The name of the resource to loadcallingClass- The Class object of the calling object
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getResourceAsStream
public static InputStream getResourceAsStream(String resourceName, Class<?> callingClass)
This is a convenience method to load a resource as a stream. The algorithm used to find the resource is given in getResource()- Parameters:
resourceName- The name of the resource to loadcallingClass- The Class object of the calling object
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loadClass
public static Class<?> loadClass(String className, Class<?> callingClass) throws ClassNotFoundException
Load a class with a given name. It will try to load the class in the following order:- From Thread.currentThread().getContextClassLoader()
- Using the basic Class.forName()
- From ClassLoaderUtil.class.getClassLoader()
- From the callingClass.getClassLoader()
- Parameters:
className- The name of the class to loadcallingClass- The Class object of the calling object- Throws:
ClassNotFoundException- If the class cannot be found anywhere.
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loadClass
public static <T> Class<? extends T> loadClass(String className, Class<?> callingClass, Class<T> type) throws ClassNotFoundException
- Throws:
ClassNotFoundException
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loadClassFromContextLoader
public static Class<?> loadClassFromContextLoader(String className) throws ClassNotFoundException
- Throws:
ClassNotFoundException
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