org.apache.tools.ant.taskdefs

Class Classloader

java.lang.Object

org.apache.tools.ant.ProjectComponent

org.apache.tools.ant.Task

org.apache.tools.ant.taskdefs.Classloader

All Implemented Interfaces:

Cloneable

public class Classloader
extends Task

EXPERIMENTAL Create or modifies ClassLoader. The required pathRef parameter will be used to add classpath elements. The classpath is a regular path. Currently only file components are supported (future extensions may allow URLs). You can modify the core loader by not specifying any name or using "ant.coreLoader". (the core loader is used to load system ant tasks and for taskdefs that don't specify an explicit path). Taskdef and typedef can use the loader you create if the name follows the "ant.loader.NAME" pattern. NAME will be used as a pathref when calling taskdef. This tasks will not modify the core loader if "build.sysclasspath=only" The typical use is:

  <path id="ant.deps" >
     <fileset dir="myDir" >
        <include name="junit.jar, bsf.jar, js.jar, etc"/>
     </fileset>
  </path>

  <classloader pathRef="ant.deps" />

 

Field Summary

Fields

Modifier and Type	Field and Description
static String	SYSTEM_LOADER_REF

Constructor Summary

Constructors

Constructor and Description
Classloader() Default constructor

Method Summary

Modifier and Type	Method and Description
Path	createClasspath() Create a classpath.
void	execute() do the classloader manipulation.
void	setClasspath(Path classpath) Set the classpath to be used when searching for component being defined
void	setClasspathRef(Reference pathRef) Specify which path will be used.
void	setName(String name) Name of the loader.
void	setParentFirst(boolean b) Set reverse attribute.
void	setParentName(String name) Set the name of the parent.
void	setReset(boolean b) Reset the classloader, if it already exists.

Methods inherited from class org.apache.tools.ant.Task

bindToOwner, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, handleErrorFlush, handleErrorOutput, handleFlush, handleInput, handleOutput, init, isInvalid, log, log, log, log, maybeConfigure, perform, reconfigure, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName, setTaskType

Methods inherited from class org.apache.tools.ant.ProjectComponent

clone, getDescription, getLocation, getProject, setDescription, setLocation, setProject

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SYSTEM_LOADER_REF

public static final String SYSTEM_LOADER_REF

See Also:

MagicNames.SYSTEM_LOADER_REF, Constant Field Values

Constructor Detail

Classloader

public Classloader()

Default constructor

Method Detail

createClasspath

public Path createClasspath()

Create a classpath.

Returns:

a path for configuration.

execute

public void execute()

do the classloader manipulation.

Overrides:

execute in class Task

setClasspath

public void setClasspath(Path classpath)

Set the classpath to be used when searching for component being defined

Parameters:

classpath - an Ant Path object containing the classpath.

setClasspathRef

public void setClasspathRef(Reference pathRef)
                     throws BuildException

Specify which path will be used. If the loader already exists and is an AntClassLoader (or any other loader we can extend), the path will be added to the loader.

Parameters:

pathRef - a reference to a path.

Throws:

BuildException - if there is a problem.

setName

public void setName(String name)

Name of the loader. If none, the default loader will be modified

Parameters:

name - the name of this loader

setParentFirst

public void setParentFirst(boolean b)

Set reverse attribute.

Parameters:

b - if true reverse the normal classloader lookup.

setParentName

public void setParentName(String name)

Set the name of the parent.

Parameters:

name - the parent name.

setReset

public void setReset(boolean b)

Reset the classloader, if it already exists. A new loader will be created and all the references to the old one will be removed. (it is not possible to remove paths from a loader). The new path will be used.

Parameters:

b - true if the loader is to be reset.