IsReference (Apache Ant API)

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 Description

IsReference()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`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