DSpaceMetadataExistsFilter (DSpace OAI-PMH 7.0-beta4 API)

java.lang.Object
- org.dspace.xoai.filter.DSpaceFilter
- - org.dspace.xoai.filter.DSpaceMetadataExistsFilter

All Implemented Interfaces:

com.lyncode.xoai.dataprovider.data.Filter
```
public class DSpaceMetadataExistsFilter
extends DSpaceFilter
```
This filter allows one to retrieve (from the data source) those items which contains at least one metadata field value defined, it allows one to define multiple metadata fields to check against.
One line summary: At least one metadata field defined

Author:

Ariel J. Lira (arieljlira at gmail dot com), Lyncode Development Team (dspace at lyncode dot com)

- Field Summary
  - Fields inherited from class org.dspace.xoai.filter.DSpaceFilter
    configuration, context, fieldResolver
- Constructor Summary
  
  Constructors
  Constructor Description
  
  DSpaceMetadataExistsFilter()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  SolrFilterResult buildSolrQuery()
  
  boolean isShown(DSpaceItem item)
  - Methods inherited from class org.dspace.xoai.filter.DSpaceFilter
    getConfiguration, getContext, getFieldResolver, isItemShown, setConfiguration, setContext, setFieldResolver
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - DSpaceMetadataExistsFilter
```
public DSpaceMetadataExistsFilter()
```
- Method Detail
  - isShown
```
public boolean isShown(DSpaceItem item)
```
    Specified by:
    
    isShown in class DSpaceFilter
  - buildSolrQuery
```
public SolrFilterResult buildSolrQuery()
```
    Specified by:
    
    buildSolrQuery in class DSpaceFilter