org.apache.tools.ant
Class Target

java.lang.Object
  org.apache.tools.ant.Target

All Implemented Interfaces:

TaskContainer

public class Target

extends java.lang.Object

implements TaskContainer

Class to implement a target object with required parameters.

Author:

James Davidson duncan@x180.com

Constructor Summary

Target()
Sole constructor.

Method Summary

void	addDataType(RuntimeConfigurable r) Adds the wrapper for a data type element to this target.
void	addDependency(java.lang.String dependency) Adds a dependency to this target.
void	addTask(Task task) Adds a task to this target.
void	execute() Executes the target if the "if" and "unless" conditions are satisfied.
java.util.Enumeration	getDependencies() Returns an enumeration of the dependencies of this target.
java.lang.String	getDescription() Returns the description of this target.
java.lang.String	getName() Returns the name of this target.
Project	getProject() Returns the project this target belongs to.
Task[]	getTasks() Returns the current set of tasks to be executed by this target.
void	performTasks() Performs the tasks within this target (if the conditions are met), firing target started/target finished messages around a call to execute.
void	setDepends(java.lang.String depS) Sets the list of targets this target is dependent on.
void	setDescription(java.lang.String description) Sets the description of this target.
void	setIf(java.lang.String property) Sets the "if" condition to test on execution.
void	setName(java.lang.String name) Sets the name of this target.
void	setProject(Project project) Sets the project this target belongs to.
void	setUnless(java.lang.String property) Sets the "unless" condition to test on execution.
java.lang.String	toString() Returns the name of this target.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Target

public Target()

Sole constructor.

Method Detail

setProject

public void setProject(Project project)

Sets the project this target belongs to.

Parameters:

project - The project this target belongs to. Must not be null.

getProject

public Project getProject()

Returns the project this target belongs to.

Returns:

The project this target belongs to, or null if the project has not been set yet.

setDepends

public void setDepends(java.lang.String depS)

Sets the list of targets this target is dependent on. The targets themselves are not resolved at this time.

Parameters:

depS - A comma-separated list of targets this target depends on. Must not be null.

setName

public void setName(java.lang.String name)

Sets the name of this target.

Parameters:

name - The name of this target. Should not be null.

getName

public java.lang.String getName()

Returns the name of this target.

Returns:

the name of this target, or null if the name has not been set yet.

addTask

public void addTask(Task task)

Adds a task to this target.

Specified by:

addTask in interface TaskContainer

Parameters:

task - The task to be added. Must not be null.

addDataType

public void addDataType(RuntimeConfigurable r)

Adds the wrapper for a data type element to this target.

Parameters:

r - The wrapper for the data type element to be added. Must not be null.

getTasks

public Task[] getTasks()

Returns the current set of tasks to be executed by this target.

Returns:

an array of the tasks currently within this target

addDependency

public void addDependency(java.lang.String dependency)

Adds a dependency to this target.

Parameters:

dependency - The name of a target this target is dependent on. Must not be null.

getDependencies

public java.util.Enumeration getDependencies()

Returns an enumeration of the dependencies of this target.

Returns:

an enumeration of the dependencies of this target

setIf

public void setIf(java.lang.String property)

Sets the "if" condition to test on execution. This is the name of a property to test for existence - if the property is not set, the task will not execute. The property goes through property substitution once before testing, so if property foo has value bar, setting the "if" condition to ${foo}_x will mean that the task will only execute if property bar_x is set.

Parameters:

property - The property condition to test on execution. May be null, in which case no "if" test is performed.

setUnless

public void setUnless(java.lang.String property)

Sets the "unless" condition to test on execution. This is the name of a property to test for existence - if the property is set, the task will not execute. The property goes through property substitution once before testing, so if property foo has value bar, setting the "unless" condition to ${foo}_x will mean that the task will only execute if property bar_x isn't set.

Parameters:

property - The property condition to test on execution. May be null, in which case no "unless" test is performed.

setDescription

public void setDescription(java.lang.String description)

Sets the description of this target.

Parameters:

description - The description for this target. May be null, indicating that no description is available.

getDescription

public java.lang.String getDescription()

Returns the description of this target.

Returns:

the description of this target, or null if no description is available.

toString

public java.lang.String toString()

Returns the name of this target.

Returns:

the name of this target, or null if the name has not been set yet.

execute

public void execute()
             throws BuildException

Executes the target if the "if" and "unless" conditions are satisfied. Dependency checking should be done before calling this method, as it does no checking of its own. If either the "if" or "unless" test prevents this target from being executed, a verbose message is logged giving the reason. It is recommended that clients of this class call performTasks rather than this method so that appropriate build events are fired.

Throws:

BuildException - if any of the tasks fail or if a data type configuration fails.

See Also:

performTasks(), setIf(String), setUnless(String)

performTasks

public final void performTasks()

Performs the tasks within this target (if the conditions are met), firing target started/target finished messages around a call to execute.

See Also:

execute()