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java.lang.Objectjava.lang.ClassLoader
java.security.SecureClassLoader
java.net.URLClassLoader
org.apache.xbean.classloader.NamedClassLoader
org.apache.xbean.classloader.MultiParentClassLoader
org.apache.xbean.classloader.JarFileClassLoader
public class JarFileClassLoader
The JarFileClassLoader that loads classes and resources from a list of JarFiles. This method is simmilar to URLClassLoader except it properly closes JarFiles when the classloader is destroyed so that the file read lock will be released, and the jar file can be modified and deleted.
Note: This implementation currently does not work reliably on windows, since the jar URL handler included with the Sun JavaVM holds a read lock on the JarFile, and this lock is not released when the jar url is dereferenced. To fix this a replacement for the jar url handler must be written.
Constructor Summary | |
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JarFileClassLoader(String name,
URL[] urls)
Creates a JarFileClassLoader that is a child of the system class loader. |
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JarFileClassLoader(String name,
URL[] urls,
ClassLoader parent)
Creates a JarFileClassLoader that is a child of the specified class loader. |
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JarFileClassLoader(String name,
URL[] urls,
ClassLoader[] parents)
Creates a named class loader as a child of the specified parents. |
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JarFileClassLoader(String name,
URL[] urls,
ClassLoader[] parents,
boolean inverseClassLoading,
Collection hiddenClasses,
Collection nonOverridableClasses)
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JarFileClassLoader(String name,
URL[] urls,
ClassLoader[] parents,
boolean inverseClassLoading,
String[] hiddenClasses,
String[] nonOverridableClasses)
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JarFileClassLoader(String name,
URL[] urls,
ClassLoader parent,
boolean inverseClassLoading,
String[] hiddenClasses,
String[] nonOverridableClasses)
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Method Summary | |
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void |
addURL(URL url)
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protected void |
addURLs(URL[] urls)
Adds an array of urls to the end of this class loader. |
void |
destroy()
Destroys the clasloader releasing all resources. After this mehtod is called, the class loader will no longer load any classes or resources. |
protected Class |
findClass(String className)
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protected String |
findLibrary(String libraryName)
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URL |
findResource(String resourceName)
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Enumeration |
findResources(String resourceName)
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URL[] |
getURLs()
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Methods inherited from class org.apache.xbean.classloader.MultiParentClassLoader |
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getParents, getResource, loadClass, toString |
Methods inherited from class org.apache.xbean.classloader.NamedClassLoader |
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getName, isDestroyed |
Methods inherited from class java.net.URLClassLoader |
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definePackage, getPermissions, newInstance, newInstance |
Methods inherited from class java.security.SecureClassLoader |
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defineClass, defineClass |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public JarFileClassLoader(String name, URL[] urls)
name
- the name of this class loaderurls
- a list of URLs from which classes and resources should be loadedpublic JarFileClassLoader(String name, URL[] urls, ClassLoader parent)
name
- the name of this class loaderurls
- a list of URLs from which classes and resources should be loadedparent
- the parent of this class loaderpublic JarFileClassLoader(String name, URL[] urls, ClassLoader parent, boolean inverseClassLoading, String[] hiddenClasses, String[] nonOverridableClasses)
public JarFileClassLoader(String name, URL[] urls, ClassLoader[] parents)
name
- the name of this class loaderurls
- the urls from which this class loader will classes and resourcesparents
- the parents of this class loaderpublic JarFileClassLoader(String name, URL[] urls, ClassLoader[] parents, boolean inverseClassLoading, Collection hiddenClasses, Collection nonOverridableClasses)
public JarFileClassLoader(String name, URL[] urls, ClassLoader[] parents, boolean inverseClassLoading, String[] hiddenClasses, String[] nonOverridableClasses)
Method Detail |
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public URL[] getURLs()
getURLs
in class URLClassLoader
public void addURL(URL url)
addURL
in class URLClassLoader
protected void addURLs(URL[] urls)
urls
- the URLs to addpublic void destroy()
destroy
in interface DestroyableClassLoader
destroy
in class NamedClassLoader
public URL findResource(String resourceName)
findResource
in class URLClassLoader
public Enumeration findResources(String resourceName) throws IOException
findResources
in class MultiParentClassLoader
IOException
protected String findLibrary(String libraryName)
findLibrary
in class ClassLoader
protected Class findClass(String className) throws ClassNotFoundException
findClass
in class URLClassLoader
ClassNotFoundException
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