Package org.apache.tools.ant.taskdefs.condition

# Class IsSet

java.lang.Object
org.apache.tools.ant.ProjectComponent
org.apache.tools.ant.taskdefs.condition.IsSet

All Implemented Interfaces:
  `Cloneable`, `Condition`

public class IsSet extends ProjectComponent implements Condition
Condition that tests whether a given property has been set.

Since:
  Ant 1.5

- ## Field Summary

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

  `description, location, project`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `IsSet()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `boolean`
  `eval()`
  Is this condition true?
  `void`
  `setProperty​(String p)`
  Set the property attribute

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

  `clone, getDescription, getLocation, getProject, log, log, setDescription, setLocation, setProject`

  ### Methods inherited from class java.lang.Object

  `equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Constructor Details

  - ### IsSet

    public IsSet()

- ## Method Details

  - ### setProperty

    public void setProperty​(String p)
    Set the property attribute
    Parameters:
      `p` - the property name

  - ### eval

    public boolean eval() throws BuildException
    Description copied from interface: `Condition`
    Is this condition true?
    Specified by:
      `eval` in interface `Condition`
    Returns:
      true if the property exists
    Throws:
      `BuildException` - if the property attribute is not set