Package org.apache.tools.ant.types.resources

# Class Union

java.lang.Object
org.apache.tools.ant.ProjectComponent
org.apache.tools.ant.types.DataType
org.apache.tools.ant.types.resources.BaseResourceCollectionContainer
org.apache.tools.ant.types.resources.Union

All Implemented Interfaces:
  `Cloneable`, `Iterable<Resource>`, `ResourceCollection`, `AppendableResourceCollection`

public class Union extends BaseResourceCollectionContainer
ResourceCollection representing the union of multiple nested ResourceCollections.

Since:
  Ant 1.7

- ## Field Summary

  ### Fields inherited from class org.apache.tools.ant.types.DataType

  `checked, ref`

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

  `description, location, project`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `Union()`
  Default constructor.
  `Union(Project project)`
  Create a new Union.
  `Union(Project project, ResourceCollection rc)`
  Convenience constructor.
  `Union(ResourceCollection rc)`
  Convenience constructor.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `protected Set<Resource>`
  `getAllResources()`
  Get the unified set of contained Resources.
  `protected Collection<String>`
  `getAllToStrings()`
  Get a collection of strings representing the unified resource set (strings may duplicate).
  `protected Collection<Resource>`
  `getCollection()`
  Unify the contained Resources.
  `protected <T> Collection<T>`
  `getCollection(boolean asString)`
  Deprecated.
  `static Union`
  `getInstance(ResourceCollection rc)`
  Static convenience method to union an arbitrary set of Resources.
  `String[]`
  `list()`
  Returns all Resources in String format.
  `Resource[]`
  `listResources()`
  Convenience method.

  ### Methods inherited from class org.apache.tools.ant.types.resources.BaseResourceCollectionContainer

  `add, addAll, clear, clone, dieOnCircularReference, getResourceCollections, isCache, isFilesystemOnly, iterator, setCache, size, toString`

  ### Methods inherited from class org.apache.tools.ant.types.DataType

  `checkAttributesAllowed, checkChildrenAllowed, circularReference, dieOnCircularReference, dieOnCircularReference, getCheckedRef, getCheckedRef, getCheckedRef, getCheckedRef, getCheckedRef, getDataTypeName, getRefid, invokeCircularReferenceCheck, isChecked, isReference, noChildrenAllowed, pushAndInvokeCircularReferenceCheck, setChecked, setRefid, tooManyAttributes`

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

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

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

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

  ### Methods inherited from interface java.lang.Iterable

  `forEach, spliterator`

  ### Methods inherited from interface org.apache.tools.ant.types.ResourceCollection

  `isEmpty, stream`

- ## Constructor Details

  - ### Union

    public Union()
    Default constructor.

  - ### Union

    public Union(Project project)
    Create a new Union.
    Parameters:
      `project` - owning Project

  - ### Union

    public Union(ResourceCollection rc)
    Convenience constructor.
    Parameters:
      `rc` - the ResourceCollection to add.

  - ### Union

    public Union(Project project, ResourceCollection rc)
    Convenience constructor.
    Parameters:
      `project` - owning Project
      `rc` - the ResourceCollection to add.

- ## Method Details

  - ### getInstance

    public static Union getInstance(ResourceCollection rc)
    Static convenience method to union an arbitrary set of Resources.
    Parameters:
      `rc` - a ResourceCollection.
    Returns:
      a Union.

  - ### list

    public String[] list()
    Returns all Resources in String format. Provided for convenience in implementing Path.
    Returns:
      String array of Resources.

  - ### listResources

    public Resource[] listResources()
    Convenience method.
    Returns:
      Resource[]

  - ### getCollection

    protected Collection<Resource> getCollection()
    Unify the contained Resources.
    Specified by:
      `getCollection` in class `BaseResourceCollectionContainer`
    Returns:
      a Collection of Resources.

  - ### getCollection

    @Deprecated protected <T> Collection<T> getCollection(boolean asString)
    Deprecated.
    Unify the contained Resources.
    Type Parameters:
      `T` - resource type
    Parameters:
      `asString` - indicates whether the resulting Collection should contain Strings instead of Resources.
    Returns:
      a Collection of Resources.

  - ### getAllToStrings

    protected Collection<String> getAllToStrings()
    Get a collection of strings representing the unified resource set (strings may duplicate).
    Returns:
      Collection<String>

  - ### getAllResources

    protected Set<Resource> getAllResources()
    Get the unified set of contained Resources.
    Returns:
      Set<Resource>