calling ant script file from Java class itself

Question

I have a query that is - I have a separate xml file named abc.xml which is an xml file having ant tasks in it. Now i can execute that file from ant perspective through eclipse that is it different tasks i can execute but, now what i am planning is to execute that xml from the java class itself and from the main method inside that java class can i execute that abc.xml ? please advise, is it possible to call the ant script file that is in form of an xml file through itself

I was also going through run ant manually

I have separate task named as init in the abc.xml file

what i have tries in side the main method of java class is

File buildFile = new File("abc.xml");
           Project p = new Project();
           p.setUserProperty("ant.file", buildFile.getAbsolutePath());
           p.init();
           ProjectHelper helper = ProjectHelper.getProjectHelper();
           p.addReference("ant.projectHelper", helper);
           helper.parse(p, buildFile);
           p.executeTarget(p.getDefaultTarget());

but the error that i am getting is..

Exception in init: org/apache/tools/ant/launch/Locator
    at org.apache.tools.ant.util.FileUtils.fromURI(FileUtils.java:1261)
    at org.apache.tools.ant.Location.<init>(Location.java:87)
    at org.apache.tools.ant.Location.<init>(Location.java:70)
    at org.apache.tools.ant.helper.ProjectHelper2$ProjectHandler.onStartElement(ProjectHelper2.java:611)
    at org.apache.tools.ant.helper.ProjectHelper2$RootHandler.startElement(ProjectHelper2.java:465) 

Answer 1

The class org.apache.tools.ant.launch.Locator can be found in ant-launcher.jar . Check CLASSPATH of your porgram and make sure ant-launcher.jar and other required jars are available.