PassThroughFieldExtractor (Spring Batch 4.1.4.RELEASE API)

java.lang.Object
- org.springframework.batch.item.file.transform.PassThroughFieldExtractor<T>

所有已实现的接口:
FieldExtractor<T>
```
public class PassThroughFieldExtractor<T>
extends java.lang.Object
implements FieldExtractor<T>
```
FieldExtractor that just returns the original item. If the item is an array or collection it will be returned as is, otherwise it is wrapped in a single element array.
作者:
Dave Syer

- 构造器概要
  构造器
  构造器说明
  PassThroughFieldExtractor()
- 方法概要
  所有方法实例方法具体方法
  修饰符和类型方法说明
  java.lang.Object[] extract(T item)
  Get an array of fields as close as possible to the input.
  - 从类继承的方法 java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - PassThroughFieldExtractor
```
public PassThroughFieldExtractor()
```
- 方法详细资料
  - extract
```
public java.lang.Object[] extract(T item)
```
    Get an array of fields as close as possible to the input. The result depends on the type of the input:
    A FieldSet or array will be returned as is
    For a Collection the toArray() method will be used
    For a Map the values() will be returned as an array
    Otherwise it is wrapped in a single element array.
    Note that no attempt is made to sort the values, so passing in an unordered collection or map is probably a bad idea. Spring often gives you an ordered Map (e.g. if extracting data from a generic query using JDBC), so check the documentation for whatever is being used to generate the input.
    指定者:
    extract 在接口中 FieldExtractor<T>
    参数:
    item - the object to convert
    返回:
    an array of objects as close as possible to the original item