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

# Class ResourceExists

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

All Implemented Interfaces:
  `Cloneable`, `Condition`

public class ResourceExists extends ProjectComponent implements Condition
Condition that checks whether a given resource exists.

Since:
  Ant 1.8.0

## Field Summary

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

`description, location, project`

## Constructor Summary

Constructors
Constructor
Description
`ResourceExists()`

## Method Summary

Modifier and Type
Method
Description
`void`
`add(Resource r)`
The resource to test.
`boolean`
`eval()`
Is this condition true?
`protected void`
`validate()`
Argument validation.

### 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

### ResourceExists

public ResourceExists()

## Method Details

### add

public void add(Resource r)
The resource to test.

Parameters:
  `r` - Resource

### validate

protected void validate() throws BuildException
Argument validation.

Throws:
  `BuildException`

### 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 condition is true
Throws:
  `BuildException` - if an error occurs