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

# Class LazyResourceCollectionWrapper

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

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

public class LazyResourceCollectionWrapper extends AbstractResourceCollectionWrapper
Resource collection which load underlying resource collection only on demand with support for caching

## 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
`LazyResourceCollectionWrapper()`

## Method Summary

Modifier and Type
Method
Description
`protected Iterator<Resource>`
`createIterator()`
Do create an iterator on the resource collection.
`protected boolean`
`filterResource(Resource r)`
Specify if the resource should be filtered or not.
`protected int`
`getSize()`
Do compute the size of the resource collection.

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

`add, dieOnCircularReference, getResourceCollection, isCache, isFilesystemOnly, iterator, setCache, size, toString`

### 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`

## Constructor Details

### LazyResourceCollectionWrapper

public LazyResourceCollectionWrapper()

## Method Details

### createIterator

protected Iterator<Resource> createIterator()
Description copied from class: `AbstractResourceCollectionWrapper`
Do create an iterator on the resource collection. The creation of the iterator is allowed to not be thread safe whereas the iterator itself should. The returned iterator will be wrapped into the FailFast one.

Specified by:
  `createIterator` in class `AbstractResourceCollectionWrapper`
Returns:
  the iterator on the resource collection

### getSize

protected int getSize()
Description copied from class: `AbstractResourceCollectionWrapper`
Do compute the size of the resource collection. The implementation of this function is allowed to be not thread safe.

Specified by:
  `getSize` in class `AbstractResourceCollectionWrapper`
Returns:
  size of resource collection.

### filterResource

protected boolean filterResource(Resource r)
Specify if the resource should be filtered or not. This function should be overridden in order to define the filtering algorithm

Parameters:
  `r` - resource considered for filtration
Returns:
  whether the resource should be filtered or not