calling ant from java program 2004-08-25 - By Olivier CROISIER
> How can I call a ant task from java program?
> Regds
> Ashutosh
Here is some code I wrote.
It allows you to run any ant target from within a regular Java app.
You'll need ant-launcher.jar and ant.jar for this class to compile.
Enjoy :)
BTW, any comment/idea/debug/fix welcome !
import org.apache.tools.ant.*;
import java.io.*;
import java.util.*;
/**
* <PRE>
* This class is designed to call Ant targets from any Java application.
* 1. Initialize a new Project by calling "init"
* 2. Feed Ant with some properties by calling "setProperties" (optional)
* 3. Run an Ant target by calling "runTarget"
*
*
* Example :
*
* try
* {
* //init
* init("/home/me/build.xml","/home/me/");
* //properties
* HashMap m = new HashMap();
* m.put("event", "test");
* m.put("subject", "sujet java 3");
* m.put("message", "message java 3");
* setProperties(m, false);
* //run
* runTarget("test");
* } catch (Exception e) { e.printStackTrace(); }
* </PRE>
*
* @(protected) croisier
*/
public class AntRunner
{
private Project project;
/**
* Initializes a new Ant Project.
* @(protected) _buildFile The build File to use. If none is provided, it will
be defaulted to "build.xml".
* @(protected) _baseDir The project's base directory. If none is provided, will
be defaulted to "." (the current directory).
* @(protected) Exception Exceptions are self-explanatory (read their Message)
*/
public void init(String _buildFile, String _baseDir) throws Exception
{
// Create a new project, and perform some default initialization
project = new Project();
try { project.init(); }
catch (BuildException e)
{ throw new Exception("The default task list could not be loaded."
); }
// Set the base directory. If none is given, "." is used.
if (_baseDir == null) _baseDir=new String(".");
try { project.setBasedir(_baseDir); }
catch (BuildException e)
{ throw new Exception("The given basedir doesn't exist, or isn't a
directory."); }
// Parse the given buildfile. If none is given, "build.xml" is used.
if (_buildFile == null) _buildFile=new String("build.xml");
try { ProjectHelper.getProjectHelper().parse(project, new File(
_buildFile)); }
catch (BuildException e)
{ throw new Exception("Configuration file "+_buildFile+" is
invalid, or cannot be read."); }
}
/**
* Sets the project's properties.
* May be called to set project-wide properties, or just before a target
call to set target-related properties only.
* @(protected) _properties A map containing the properties' name/value couples
* @(protected) _overridable If set, the provided properties values may be
overriden by the config file's values
* @(protected) Exception Exceptions are self-explanatory (read their Message)
*/
public void setProperties(Map _properties, boolean _overridable) throws
Exception
{
// Test if the project exists
if (project == null) throw new Exception("Properties cannot be set
because the project has not been initialized. Please call the 'init' method
first !");
// Property hashmap is null
if (_properties == null) throw new Exception("The provided property
map is null.");
// Loop through the property map
Set propertyNames = _properties.keySet();
Iterator iter = propertyNames.iterator();
while (iter.hasNext())
{
// Get the property's name and value
String propertyName = (String) iter.next();
String propertyValue = (String) _properties.get(propertyName);
if (propertyValue == null) continue;
// Set the properties
if (_overridable) project.setProperty(propertyName, propertyValue);
else project.setUserProperty(propertyName, propertyValue);
}
}
/**
* Runs the given Target.
* @(protected) _target The name of the target to run. If null, the project's
default target will be used.
* @(protected) Exception Exceptions are self-explanatory (read their Message)
*/
public void runTarget(String _target) throws Exception
{
// Test if the project exists
if (project == null) throw new Exception("No target can be launched
because the project has not been initialized. Please call the 'init' method
first !");
// If no target is specified, run the default one.
if (_target == null) _target = project.getDefaultTarget();
// Run the target
try { project.executeTarget(_target); }
catch (BuildException e)
{ throw new Exception(e.getMessage()); }
}
}
--
CROISIER Olivier
Software Engineer
Thales IS - ANS
olivier.croisier@(protected)
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