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

# Class IsReference

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

All Implemented Interfaces:
  `Cloneable`, `Condition`

public class IsReference extends ProjectComponent implements Condition
Condition that tests whether a given reference has been defined.

Optionally tests whether it is of a given type/class.

Since:
  Ant 1.6

## Field Summary

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

`description, location, project`

## Constructor Summary

Constructors
Constructor
Description
`IsReference()`

## Method Summary

Modifier and Type
Method
Description
`boolean`
`eval()`
Is this condition true?
`void`
`setRefid(Reference r)`
Set the refid attribute.
`void`
`setType(String type)`
Set the type 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

### IsReference

public IsReference()

## Method Details

### setRefid

public void setRefid(Reference r)
Set the refid attribute.

Parameters:
  `r` - a Reference value

### setType

public void setType(String type)
Set the type attribute. This is optional attribute.

Parameters:
  `type` - an ant component type 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 reference exists and if type is set, if the reference is the same type
Throws:
  `BuildException` - if an error occurs