Ant Task

This example shows how to write a simple Ant task. It demonstrates how to access the Project object -the equivalent to the currently executing build file-, and the Target object that called the task. It also accesses data from the build file, both in the form of a property ("name") and a task parameter ("myArg").

See http://ant.apache.org/manual/tutorial-writing-tasks.html for more elaborate examples and explanations.

import org.apache.tools.ant.BuildException; import org.apache.tools.ant.Project; import org.apache.tools.ant.Target; import org.apache.tools.ant.Task; public class MyTask extends Task { private String myArg; private Project proj; private Target target; // called to initialize the task @Override public void init() throws BuildException { proj = getProject(); target = getOwningTarget(); proj.log("MyTask init"); } // called to execute the task @Override public void execute() throws BuildException { log("target name: " + target.getName()); log("value of property 'name' = " + proj.getProperty("name")); log("task name: " + getTaskName()); log("value of task parameter 'myArg' = " + myArg); } // called to set task parameters; in this case "myArg" public void setMyArg (String _myArg) { this.myArg = _myArg; } }

It would be invoked like this:

<property name="name" value="myPropertyValue" /> <taskdef name="MyTaskName" classname="MyTask" /> <target name="myTarget"> <echo message="before MyTask"/> <MyTaskName myArg="myArgValue" /> <echo message="after MyTask"/> </target>

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