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:
  java.lang.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 and Description
`IsReference()`

### Method Summary

Methods
`boolean` `eval()` Is this condition true?
`void` `setRefid(Reference r)` Set the refid attribute.
`void` `setType(java.lang.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 Detail

#### IsReference

    public IsReference()

### Method Detail

#### setRefid

    public void setRefid(Reference r)

Set the refid attribute.

Parameters:
  `r` - a Reference value

#### setType

    public void setType(java.lang.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