jdk.net.URLClassLoader — clojure-interop/java.net 1.0.0

This class loader is used to load classes and resources from a search path of URLs referring to both JAR files and directories. Any URL that ends with a '/' is assumed to refer to a directory. Otherwise, the URL is assumed to refer to a JAR file which will be opened as needed.

The AccessControlContext of the thread that created the instance of URLClassLoader will be used when subsequently loading classes and resources.

The classes that are loaded are by default granted permission only to access the URLs specified when the URLClassLoader was created.

*new-instance clj

(*new-instance urls)

(*new-instance urls parent)

Creates a new instance of URLClassLoader for the specified URLs and parent class loader. If a security manager is installed, the loadClass method of the URLClassLoader returned by this method will invoke the SecurityManager.checkPackageAccess method before loading the class.

urls - the URLs to search for classes and resources - java.net.URL[] parent - the parent class loader for delegation - java.lang.ClassLoader

returns: the resulting class loader - java.net.URLClassLoader

throws: java.lang.NullPointerException - if urls is null.

->url-class-loader clj

(->url-class-loader urls)

(->url-class-loader urls parent)

(->url-class-loader urls parent factory)

Constructor.

Constructs a new URLClassLoader for the specified URLs, parent class loader, and URLStreamHandlerFactory. The parent argument will be used as the parent class loader for delegation. The factory argument will be used as the stream handler factory to obtain protocol handlers when creating new jar URLs.

If there is a security manager, this method first calls the security manager's checkCreateClassLoader method to ensure creation of a class loader is allowed.

urls - the URLs from which to load classes and resources - java.net.URL[] parent - the parent class loader for delegation - java.lang.ClassLoader factory - the URLStreamHandlerFactory to use when creating URLs - java.net.URLStreamHandlerFactory

throws: java.lang.SecurityException - if a security manager exists and its checkCreateClassLoader method doesn't allow creation of a class loader.

close clj

(close this)

Closes this URLClassLoader, so that it can no longer be used to load new classes or resources that are defined by this loader. Classes and resources defined by any of this loader's parents in the delegation hierarchy are still accessible. Also, any classes or resources that are already loaded, are still accessible.

In the case of jar: and file: URLs, it also closes any files that were opened by it. If another thread is loading a class when the close method is invoked, then the result of that load is undefined.

The method makes a best effort attempt to close all opened files, by catching IOExceptions internally. Unchecked exceptions and errors are not caught. Calling close on an already closed loader has no effect.

throws: java.io.IOException - if closing any file opened by this class loader resulted in an IOException. Any such exceptions are caught internally. If only one is caught, then it is re-thrown. If more than one exception is caught, then the second and following exceptions are added as suppressed exceptions of the first one caught, which is then re-thrown.

find-resource clj

(find-resource this name)

Finds the resource with the specified name on the URL search path.

name - the name of the resource - java.lang.String

returns: a URL for the resource, or null if the resource could not be found, or if the loader is closed. - java.net.URL

find-resources clj

(find-resources this name)

Returns an Enumeration of URLs representing all of the resources on the URL search path having the specified name.

name - the resource name - java.lang.String

returns: an Enumeration of URLs If the loader is closed, the Enumeration will be empty. - java.util.Enumeration<java.net.URL>

throws: java.io.IOException - if an I/O exception occurs

get-resource-as-stream clj

(get-resource-as-stream this name)

Returns an input stream for reading the specified resource. If this loader is closed, then any resources opened by this method will be closed.

The search order is described in the documentation for ClassLoader.getResource(String).

name - The resource name - java.lang.String

returns: An input stream for reading the resource, or null if the resource could not be found - java.io.InputStream

get-ur-ls clj

(get-ur-ls this)

Returns the search path of URLs for loading classes and resources. This includes the original list of URLs specified to the constructor, along with any URLs subsequently appended by the addURL() method.

returns: the search path of URLs for loading classes and resources. - java.net.URL[]