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

## Class Resources

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

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

      public class Resources
      extends DataType
      implements AppendableResourceCollection

  Generic `ResourceCollection`: Either stores nested `ResourceCollection`s, making no attempt to remove duplicates, or references another `ResourceCollection`.
  Since:
    Ant 1.7

- - ### Field Summary

    Fields
    Modifier and Type | Field | Description
    --- | --- | ---
    `static java.util.Iterator<Resource>` | `EMPTY_ITERATOR` | `static` empty `Iterator`
    `static ResourceCollection` | `NONE` | `static` empty `ResourceCollection`

    - ### 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
    --- | ---
    `Resources()` | Create a new `Resources`.
    `Resources​(Project project)` | Create a new `Resources`.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `add​(ResourceCollection c)` | Add a `ResourceCollection`.
    `protected void` | `dieOnCircularReference​(java.util.Stack<java.lang.Object> stk, Project p)` | Overrides the base implementation to recurse on all `DataType` child elements that may have been added.
    `protected void` | `invalidateExistingIterators()` | Allow subclasses to notify existing Iterators they have experienced concurrent modification.
    `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 `Resources` as a `String`.

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

      `checkAttributesAllowed, checkChildrenAllowed, circularReference, clone, 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`

- - ### Field Detail

    - #### NONE

          public static final ResourceCollection NONE

      `static` empty `ResourceCollection`

    - #### EMPTY_ITERATOR

          public static final java.util.Iterator<Resource> EMPTY_ITERATOR

      `static` empty `Iterator`

  - ### Constructor Detail

    - #### Resources

          public Resources()

      Create a new `Resources`.

    - #### Resources

          public Resources​(Project project)

      Create a new `Resources`.
      Parameters:
        `project` - `Project`
      Since:
        Ant 1.8

  - ### Method Detail

    - #### setCache

          public void setCache​(boolean b)

      Set whether to cache collections.
      Parameters:
        `b` - `boolean` cache flag.
      Since:
        Ant 1.8.0

    - #### add

          public void add​(ResourceCollection c)

      Add a `ResourceCollection`.
      Specified by:
        `add` in interface `AppendableResourceCollection`
      Parameters:
        `c` - the `ResourceCollection` to add.

    - #### iterator

          public java.util.Iterator<Resource> iterator()

      Fulfill the `ResourceCollection` contract.
      Specified by:
        `iterator` in interface `java.lang.Iterable<Resource>`
      Returns:
        an `Iterator` of `Resources`.

    - #### 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:
        `true` if all `Resource`s represent files.

    - #### toString

          public java.lang.String toString()

      Format this `Resources` as a `String`.
      Overrides:
        `toString` in class `DataType`
      Returns:
        a descriptive `String`.

    - #### dieOnCircularReference

          protected void dieOnCircularReference​(java.util.Stack<java.lang.Object> stk,
                                                Project p)
                                         throws BuildException

      Overrides the base implementation 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.

    - #### invalidateExistingIterators

          protected void invalidateExistingIterators()

      Allow subclasses to notify existing Iterators they have experienced concurrent modification.