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

# Class BaseResourceCollectionContainer

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

All Implemented Interfaces:
  `java.lang.Cloneable`, `java.lang.Iterable<Resource>`, `ResourceCollection`

Direct Known Subclasses:
  `Difference`, `Intersect`, `Union`

    public abstract class BaseResourceCollectionContainer
    extends DataType
    implements ResourceCollection, java.lang.Cloneable

Base class for ResourceCollections that nest multiple 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
  --- | ---
  `BaseResourceCollectionContainer()` | Create a new BaseResourceCollectionContainer.
  `BaseResourceCollectionContainer​(Project project)` | Create a new BaseResourceCollectionContainer.

- ## Method Summary

  Modifier and Type | Method | Description
  --- | --- | ---
  `void` | `add​(ResourceCollection c)` | Add a ResourceCollection to the container.
  `void` | `addAll​(java.util.Collection<? extends ResourceCollection> c)` | Add the Collection of ResourceCollections to the container.
  `void` | `clear()` | Clear the container.
  `java.lang.Object` | `clone()` | Implement clone.
  `protected void` | `dieOnCircularReference​(java.util.Stack<java.lang.Object> stk, Project p)` | Overrides the version of DataType to recurse on all DataType child elements that may have been added.
  `protected abstract java.util.Collection<Resource>` | `getCollection()` | Template method for subclasses to return a Collection object of Resources.
  `java.util.List<ResourceCollection>` | `getResourceCollections()` | Get the nested ResourceCollections.
  `boolean` | `isCache()` | Learn whether to cache collections.
  `boolean` | `isFilesystemOnly()` | Fulfill the ResourceCollection contract.
  `java.util.Iterator<Resource>` | `iterator()` | Fulfill the ResourceCollection contract.
  `void` | `setCache​(boolean b)` | Set whether to cache collections.
  `int` | `size()` | Fulfill the ResourceCollection contract.
  `java.lang.String` | `toString()` | Format this BaseResourceCollectionContainer as a String.

  ### 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

  - ### BaseResourceCollectionContainer

    public BaseResourceCollectionContainer()
    Create a new BaseResourceCollectionContainer.

  - ### BaseResourceCollectionContainer

    public BaseResourceCollectionContainer​(Project project)
    Create a new BaseResourceCollectionContainer.
    Parameters:
      `project` - Project
    Since:
      Ant 1.8

- ## Method Details

  - ### setCache

    public void setCache​(boolean b)
    Set whether to cache collections.
    Parameters:
      `b` - boolean cache flag.

  - ### isCache

    public boolean isCache()
    Learn whether to cache collections. Default is `true`.
    Returns:
      boolean cache flag.

  - ### clear

    public void clear() throws BuildException
    Clear the container.
    Throws:
      `BuildException` - on error.

  - ### add

    public void add​(ResourceCollection c) throws BuildException
    Add a ResourceCollection to the container.
    Parameters:
      `c` - the ResourceCollection to add.
    Throws:
      `BuildException` - on error.

  - ### addAll

    public void addAll​(java.util.Collection<? extends ResourceCollection> c) throws BuildException
    Add the Collection of ResourceCollections to the container.
    Parameters:
      `c` - the Collection whose elements to add.
    Throws:
      `BuildException` - on error.

  - ### iterator

    public final java.util.Iterator<Resource> iterator()
    Fulfill the ResourceCollection contract. The Iterator returned will throw ConcurrentModificationExceptions if ResourceCollections are added to this container while the Iterator is in use.
    Specified by:
      `iterator` in interface `java.lang.Iterable<Resource>`
    Returns:
      a "fail-fast" Iterator.

  - ### size

    public int size()
    Fulfill the ResourceCollection contract.
    Specified by:
      `size` in interface `ResourceCollection`
    Returns:
      number of elements as int.

  - ### isFilesystemOnly

    public boolean isFilesystemOnly()
    Fulfill the ResourceCollection contract.
    Specified by:
      `isFilesystemOnly` in interface `ResourceCollection`
    Returns:
      whether this is a filesystem-only resource collection.

  - ### dieOnCircularReference

    protected void dieOnCircularReference​(java.util.Stack<java.lang.Object> stk, Project p) throws BuildException
    Overrides the version of DataType to recurse on all DataType child elements that may have been added.
    Overrides:
      `dieOnCircularReference` in class `DataType`
    Parameters:
      `stk` - the stack of data types to use (recursively).
      `p` - the project to use to dereference the references.
    Throws:
      `BuildException` - on error.

  - ### getResourceCollections

    public final java.util.List<ResourceCollection> getResourceCollections()
    Get the nested ResourceCollections.
    Returns:
      List.

  - ### getCollection

    protected abstract java.util.Collection<Resource> getCollection()
    Template method for subclasses to return a Collection object of Resources.
    Returns:
      Collection.

  - ### clone

    public java.lang.Object clone()
    Implement clone. The set of nested resource collections is shallowly cloned.
    Overrides:
      `clone` in class `DataType`
    Returns:
      a cloned instance.

  - ### toString

    public java.lang.String toString()
    Format this BaseResourceCollectionContainer as a String.
    Overrides:
      `toString` in class `DataType`
    Returns:
      a descriptive `String`.