org.apache.tools.ant.taskdefs

Class Available

Implemented Interfaces:
Condition

public class Available
extends Task
implements Condition

Will set the given property if the requested resource is available at runtime. This task may also be used as a condition by the condition task.

Since:
Ant 1.1

Nested Class Summary

static class
Available.FileDir
EnumeratedAttribute covering the file types to be checked for, either file or dir.

Field Summary

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

description, location, target, taskName, taskType, wrapper

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

project

Method Summary

Path
createClasspath()
Classpath to be used when searching for classes and resources.
Path
createFilepath()
Path to search for file resources.
boolean
eval()
Evaluate the availability of a resource.
void
execute()
Entry point when operating as a task.
void
setClassname(String classname)
Set a classname of a class which must be available to set the given property.
void
setClasspath(Path classpath)
Set the classpath to be used when searching for classes and resources.
void
setClasspathRef(Reference r)
Set the classpath by reference.
void
setFile(File file)
Set the file which must be present in the file system to set the given property.
void
setFilepath(Path filepath)
Set the path to use when looking for a file.
void
setIgnoresystemclasses(boolean ignore)
Set whether the search for classes should ignore the runtime classes and just use the given classpath.
void
setProperty(String property)
Set the name of the property which will be set if the particular resource is available.
void
setResource(String resource)
Set the name of a Java resource which is required to set the property.
void
setType(String type)
Deprecated. setType(String) is deprecated and is replaced with setType(Available.FileDir) to make Ant's Introspection mechanism do the work and also to encapsulate operations on the type in its own class.
void
setType(Available.FileDir type)
Set what type of file is required - either directory or file.
void
setValue(String value)
Set the value to be given to the property if the desired resource is available.

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

execute, getDescription, getLocation, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, handleErrorFlush, handleErrorOutput, handleFlush, handleInput, handleOutput, init, isInvalid, log, log, maybeConfigure, perform, reconfigure, setDescription, setLocation, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName, setTaskType

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

getProject, log, log, setProject

Method Details

createClasspath

public Path createClasspath()
Classpath to be used when searching for classes and resources.

Returns:
an empty Path instance to be configured by Ant.


createFilepath

public Path createFilepath()
Path to search for file resources.

Returns:
a new Path instance which Ant will configure with a file search path.


eval

public boolean eval()
            throws BuildException
Evaluate the availability of a resource.
Specified by:
eval in interface Condition

Returns:
boolean is the resource is available.

Throws:
BuildException - if the condition is not configured correctly


execute

public void execute()
            throws BuildException
Entry point when operating as a task.
Overrides:
execute in interface Task

Throws:
BuildException - if the task is not configured correctly.


setClassname

public void setClassname(String classname)
Set a classname of a class which must be available to set the given property.

Parameters:
classname - the name of the class required.


setClasspath

public void setClasspath(Path classpath)
Set the classpath to be used when searching for classes and resources.

Parameters:
classpath - an Ant Path object containing the search path.


setClasspathRef

public void setClasspathRef(Reference r)
Set the classpath by reference.

Parameters:
r - a Reference to a Path instance to be used as the classpath value.


setFile

public void setFile(File file)
Set the file which must be present in the file system to set the given property.

Parameters:
file - the name of the file which is required.


setFilepath

public void setFilepath(Path filepath)
Set the path to use when looking for a file.

Parameters:
filepath - a Path instance containing the search path for files.


setIgnoresystemclasses

public void setIgnoresystemclasses(boolean ignore)
Set whether the search for classes should ignore the runtime classes and just use the given classpath.

Parameters:
ignore - true if system classes are to be ignored.


setProperty

public void setProperty(String property)
Set the name of the property which will be set if the particular resource is available.

Parameters:
property - the name of the property to set.


setResource

public void setResource(String resource)
Set the name of a Java resource which is required to set the property.

Parameters:
resource - the name of a resource which is required to be available.


setType

public void setType(String type)

Deprecated. setType(String) is deprecated and is replaced with setType(Available.FileDir) to make Ant's Introspection mechanism do the work and also to encapsulate operations on the type in its own class.

Parameters:
type - the type of resource


setType

public void setType(Available.FileDir type)
Set what type of file is required - either directory or file.

Parameters:
type - an instance of the FileDir enumeratedAttribute indicating whether the file required is to be a directory or a plain file.


setValue

public void setValue(String value)
Set the value to be given to the property if the desired resource is available.

Parameters:
value - the value to be given.


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