org.apache.nutch.indexer.anchor

## Class AnchorIndexingFilter

- java.lang.Object
- - org.apache.nutch.indexer.anchor.AnchorIndexingFilter

- All Implemented Interfaces:
    Configurable, IndexingFilter, FieldPluggable, Pluggable

      public class AnchorIndexingFilter
      extends java.lang.Object
      implements IndexingFilter

  Indexing filter that offers an option to either index all inbound anchor text for a document or deduplicate anchors. Deduplication does have it's con's, Check `anchorIndexingFilter.deduplicate` in nutch-default.xml.

- - ### Field Summary

    - ### Fields inherited from interface org.apache.nutch.indexer.IndexingFilter

      `X_POINT_ID`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `AnchorIndexingFilter()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addIndexBackendOptions(Configuration conf)`
    `NutchDocument` | `filter(NutchDocument doc, java.lang.String url, WebPage page)` The `AnchorIndexingFilter` filter object which supports boolean configuration settings for the deduplication of anchors.
    `Configuration` | `getConf()` Get the `Configuration` object
    `java.util.Collection<WebPage.Field>` | `getFields()` Gets all the fields for a given `WebPage` Many datastores need to setup the mapreduce job by specifying the fields needed.
    `void` | `setConf(Configuration conf)` Set the `Configuration` object

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### AnchorIndexingFilter

          public AnchorIndexingFilter()

  - ### Method Detail

    - #### setConf

          public void setConf(Configuration conf)

      Set the `Configuration` object
      Specified by:
        `setConf` in interface `Configurable`

    - #### getConf

          public Configuration getConf()

      Get the `Configuration` object
      Specified by:
        `getConf` in interface `Configurable`

    - #### addIndexBackendOptions

          public void addIndexBackendOptions(Configuration conf)

    - #### filter

          public NutchDocument filter(NutchDocument doc,
                                      java.lang.String url,
                                      WebPage page)
                               throws IndexingException

      The `AnchorIndexingFilter` filter object which supports boolean configuration settings for the deduplication of anchors. See `anchorIndexingFilter.deduplicate` in nutch-default.xml.
      Specified by:
        `filter` in interface `IndexingFilter`
      Parameters:
        `doc` - The `NutchDocument` object
        `url` - URL to be filtered for anchor text
        `page` - `WebPage` object relative to the URL
      Returns:
        filtered NutchDocument
      Throws:
        `IndexingException`

    - #### getFields

          public java.util.Collection<WebPage.Field> getFields()

      Gets all the fields for a given `WebPage` Many datastores need to setup the mapreduce job by specifying the fields needed. All extensions that work on WebPage are able to specify what fields they need.
      Specified by:
        `getFields` in interface `FieldPluggable`

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