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## 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, 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
`BaseResourceCollectionContainer()`

Method Summary
`void` | `add(ResourceCollection c)` Add a ResourceCollection to the container.
`void` | `addAll(java.util.Collection 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 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` | `getCollection()` Template method for subclasses to return a Collection object of Resources.
`protected java.util.List` | `getResourceCollections()` Get the nested ResourceCollections.
`boolean` | `isCache()` Learn whether to cache collections.
`boolean` | `isFilesystemOnly()` Fulfill the ResourceCollection contract.
`java.util.Iterator` | `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, getDataTypeName, getRefid, invokeCircularReferenceCheck, isChecked, isReference, noChildrenAllowed, 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`

Constructor Detail

### BaseResourceCollectionContainer

    public BaseResourceCollectionContainer()

Method Detail

### 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 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 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 `ResourceCollection`
  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 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

    protected final java.util.List getResourceCollections()

  Get the nested ResourceCollections.

  Returns:
    List.

### getCollection

    protected abstract java.util.Collection 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`.

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