| java.lang.Object
 java.lang.ClassLoader
org.acm.seguin.project.ProjectClassLoader
| ProjectClassLoader | | public class ProjectClassLoader extends ClassLoader (Code) | | Used to load classes within ant with a different claspath from
that used to start ant. Note that it is possible to force a class
into this loader even when that class is on the system classpath by
using the forceLoadClass method. Any subsequent classes loaded by that
class will then use this loader rather than the system class loader.
author:
Conor MacNeill
author:
Jesse Glick
author:
Magesh Umasankar
author:
Mike Atkinson
version:
$Id: ProjectClassLoader.java,v 1.4 2004/03/25 20:24:34 mikeatkinson Exp $
since:
2.8.01 |
| Method Summary | |
| public void | addLoaderPackageRoot(String packageRoot)
Adds a package root to the list of packages which must be loaded using
this loader. | | public void | addPathElement(String pathElement)
Adds an element to the classpath to be searched.
Parameters:
pathElement - The path element to add. | | public void | addSystemPackageRoot(String packageRoot)
Adds a package root to the list of packages which must be loaded on the
parent loader. | | public synchronized void | cleanup()
Cleans up any resources held by this classloader. | | public Class | findClass(String name)
Searches for and load a class on the classpath of this class loader.
Parameters:
name - The name of the class to be loaded. | | protected Enumeration | findResources(String name)
Returns an enumeration of URLs representing all the resources with the
given name by searching the class loader's classpath.
Parameters:
name - The resource name to search for.Must not be null. | | public Class | forceLoadClass(String classname)
Loads a class through this class loader even if that class is available
on the parent classpath.
This ensures that any classes which are loaded by the returned class
will use this classloader.
Parameters:
classname - The name of the class to be loaded.Must not be null. | | public Class | forceLoadSystemClass(String classname)
Loads a class through this class loader but defer to the parent class
loader.
This ensures that instances of the returned class will be compatible
with instances which which have already been loaded on the parent
loader.
Parameters:
classname - The name of the class to be loaded.Must not be null. | | public String | getClasspath()
Returns the classpath this classloader will consult. | | public URL | getResource(String name)
Finds the resource with the given name. | | public InputStream | getResourceAsStream(String name)
Returns a stream to read the requested resource name.
Parameters:
name - The name of the resource for which a stream is required.Must not be null. | | public static void | initializeClass(Class theClass)
Forces initialization of a class in a JDK 1.1 compatible, albeit hacky
way. | | protected synchronized Class | loadClass(String classname, boolean resolve)
Loads a class with this class loader.
This class attempts to load the class in an order determined by whether
or not the class matches the system/loader package lists, with the
loader package list taking priority. | | protected void | log(String message)
Logs a message through the project object if one has been provided. | | public void | setIsolated(boolean isolated)
Sets whether this classloader should run in isolated mode. |
| ProjectClassLoader | | public ProjectClassLoader(Project project)(Code) | | Creates a classloader for the given project.
Parameters:
project - The project to which this classloader is to belong.Must not be null. |
| ProjectClassLoader | | public ProjectClassLoader(ClassLoader parent, Project project, boolean parentFirst)(Code) | | Creates a classloader for the given project.
Parameters:
parent - The parent classloader to which unsatisfied loadingattempts are delegated. May be null,in which case the classloader which loaded thisclass is used as the parent.
Parameters:
project - The project to which this classloader is to belong.Must not be null.
Parameters:
parentFirst - If true, indicates that the parentclassloader should be consulted before trying toload the a class through this loader. |
| ProjectClassLoader | | public ProjectClassLoader(Project project, boolean parentFirst)(Code) | | Creates a classloader for the given project.
Parameters:
project - The project to which this classloader is to belong.Must not be null.
Parameters:
parentFirst - If true, indicates that the parentclassloader should be consulted before trying toload the a class through this loader. |
| ProjectClassLoader | | public ProjectClassLoader(ClassLoader parent, boolean parentFirst)(Code) | | Creates an empty class loader. The classloader should be configured
with path elements to specify where the loader is to look for
classes.
Parameters:
parent - The parent classloader to which unsatisfied loadingattempts are delegated. May be null,in which case the classloader which loaded thisclass is used as the parent.
Parameters:
parentFirst - If true, indicates that the parentclassloader should be consulted before trying toload the a class through this loader. |
| addLoaderPackageRoot | | public void addLoaderPackageRoot(String packageRoot)(Code) | | Adds a package root to the list of packages which must be loaded using
this loader.
All subpackages are also included.
Parameters:
packageRoot - The root of all packages to be included.Should not be null. |
| addPathElement | | public void addPathElement(String pathElement) throws ProjectException(Code) | | Adds an element to the classpath to be searched.
Parameters:
pathElement - The path element to add. Must not benull.
exception:
ProjectException - if the given path element cannot be resolvedagainst the project. |
| addSystemPackageRoot | | public void addSystemPackageRoot(String packageRoot)(Code) | | Adds a package root to the list of packages which must be loaded on the
parent loader.
All subpackages are also included.
Parameters:
packageRoot - The root of all packages to be included.Should not be null. |
| cleanup | | public synchronized void cleanup()(Code) | | Cleans up any resources held by this classloader. Any open archive
files are closed.
|
| findClass | | public Class findClass(String name) throws ClassNotFoundException(Code) | | Searches for and load a class on the classpath of this class loader.
Parameters:
name - The name of the class to be loaded. Must not benull. the required Class object
exception:
ClassNotFoundException - if the requested class does not existon this loader's classpath. |
| findResources | | protected Enumeration findResources(String name) throws IOException(Code) | | Returns an enumeration of URLs representing all the resources with the
given name by searching the class loader's classpath.
Parameters:
name - The resource name to search for.Must not be null. an enumeration of URLs for the resources
exception:
IOException - if I/O errors occurs (can't happen) |
| forceLoadClass | | public Class forceLoadClass(String classname) throws ClassNotFoundException(Code) | | Loads a class through this class loader even if that class is available
on the parent classpath.
This ensures that any classes which are loaded by the returned class
will use this classloader.
Parameters:
classname - The name of the class to be loaded.Must not be null. the required Class object
exception:
ClassNotFoundException - if the requested class does not existon this loader's classpath. |
| forceLoadSystemClass | | public Class forceLoadSystemClass(String classname) throws ClassNotFoundException(Code) | | Loads a class through this class loader but defer to the parent class
loader.
This ensures that instances of the returned class will be compatible
with instances which which have already been loaded on the parent
loader.
Parameters:
classname - The name of the class to be loaded.Must not be null. the required Class object
exception:
ClassNotFoundException - if the requested class does not existon this loader's classpath. |
| getClasspath | | public String getClasspath()(Code) | | Returns the classpath this classloader will consult.
the classpath used for this classloader, with elementsseparated by the path separator for the system. |
| getResource | | public URL getResource(String name)(Code) | | Finds the resource with the given name. A resource is
some data (images, audio, text, etc) that can be accessed by class
code in a way that is independent of the location of the code.
Parameters:
name - The name of the resource for which a stream is required.Must not be null. a URL for reading the resource, or null if theresource could not be found or the caller doesn't haveadequate privileges to get the resource. |
| getResourceAsStream | | public InputStream getResourceAsStream(String name)(Code) | | Returns a stream to read the requested resource name.
Parameters:
name - The name of the resource for which a stream is required.Must not be null. a stream to the required resource or null if theresource cannot be found on the loader's classpath. |
| initializeClass | | public static void initializeClass(Class theClass)(Code) | | Forces initialization of a class in a JDK 1.1 compatible, albeit hacky
way.
Parameters:
theClass - The class to initialize.Must not be null. |
| loadClass | | protected synchronized Class loadClass(String classname, boolean resolve) throws ClassNotFoundException(Code) | | Loads a class with this class loader.
This class attempts to load the class in an order determined by whether
or not the class matches the system/loader package lists, with the
loader package list taking priority. If the classloader is in isolated
mode, failure to load the class in this loader will result in a
ClassNotFoundException.
Parameters:
classname - The name of the class to be loaded.Must not be null.
Parameters:
resolve - true if all classes upon which this classdepends are to be loaded. the required Class object
exception:
ClassNotFoundException - if the requested class does not existon the system classpath (when not in isolated mode) or this loader'sclasspath. |
| log | | protected void log(String message)(Code) | | Logs a message through the project object if one has been provided.
Parameters:
message - The message to log.Should not be null.
Parameters:
priority - The logging priority of the message. |
| setIsolated | | public void setIsolated(boolean isolated)(Code) | | Sets whether this classloader should run in isolated mode. In
isolated mode, classes not found on the given classpath will
not be referred to the parent class loader but will cause a
ClassNotFoundException.
Parameters:
isolated - Whether or not this classloader should run inisolated mode. |
| Methods inherited from java.lang.ClassLoader | public synchronized void clearAssertionStatus()(Code)(Java Doc)
final protected Class defineClass(byte[] b, int off, int len) throws ClassFormatError(Code)(Java Doc)
final protected Class defineClass(String name, byte[] b, int off, int len) throws ClassFormatError(Code)(Java Doc)
final protected Class defineClass(String name, byte[] b, int off, int len, ProtectionDomain protectionDomain) throws ClassFormatError(Code)(Java Doc)
final protected Class defineClass(String name, java.nio.ByteBuffer b, ProtectionDomain protectionDomain) throws ClassFormatError(Code)(Java Doc)
protected Package definePackage(String name, String specTitle, String specVersion, String specVendor, String implTitle, String implVersion, String implVendor, URL sealBase) throws IllegalArgumentException(Code)(Java Doc)
protected Class findClass(String name) throws ClassNotFoundException(Code)(Java Doc)
protected String findLibrary(String libname)(Code)(Java Doc)
final protected Class findLoadedClass(String name)(Code)(Java Doc)
protected URL findResource(String name)(Code)(Java Doc)
protected Enumeration<URL> findResources(String name) throws IOException(Code)(Java Doc)
final protected Class findSystemClass(String name) throws ClassNotFoundException(Code)(Java Doc)
protected Package getPackage(String name)(Code)(Java Doc)
protected Package[] getPackages()(Code)(Java Doc)
final public ClassLoader getParent()(Code)(Java Doc)
public URL getResource(String name)(Code)(Java Doc)
public InputStream getResourceAsStream(String name)(Code)(Java Doc)
public Enumeration<URL> getResources(String name) throws IOException(Code)(Java Doc)
public static ClassLoader getSystemClassLoader()(Code)(Java Doc)
public static URL getSystemResource(String name)(Code)(Java Doc)
public static InputStream getSystemResourceAsStream(String name)(Code)(Java Doc)
public static Enumeration<URL> getSystemResources(String name) throws IOException(Code)(Java Doc)
public Class loadClass(String name) throws ClassNotFoundException(Code)(Java Doc)
protected synchronized Class loadClass(String name, boolean resolve) throws ClassNotFoundException(Code)(Java Doc)
final protected void resolveClass(Class c)(Code)(Java Doc)
public synchronized void setClassAssertionStatus(String className, boolean enabled)(Code)(Java Doc)
public synchronized void setDefaultAssertionStatus(boolean enabled)(Code)(Java Doc)
public synchronized void setPackageAssertionStatus(String packageName, boolean enabled)(Code)(Java Doc)
final protected void setSigners(Class c, Object[] signers)(Code)(Java Doc)
|
|
|