Package org.apache.nutch.metadata

# Class SpellCheckedMetadata

java.lang.Object
org.apache.nutch.metadata.Metadata
org.apache.nutch.metadata.CaseInsensitiveMetadata
org.apache.nutch.metadata.SpellCheckedMetadata

All Implemented Interfaces:
  `Writable`, `CreativeCommons`, `DublinCore`, `Feed`, `HttpHeaders`, `Nutch`

public class SpellCheckedMetadata extends CaseInsensitiveMetadata
A decorator to Metadata that adds spellchecking capabilities to property names. Currently used spelling vocabulary contains just the HTTP headers from `HttpHeaders` class. Other names are case insensitive.

- ## Field Summary

  ### Fields inherited from class org.apache.nutch.metadata.Metadata

  `metadata`

  ### Fields inherited from interface org.apache.nutch.metadata.CreativeCommons

  `LICENSE_LOCATION, LICENSE_URL, WORK_TYPE`

  ### Fields inherited from interface org.apache.nutch.metadata.DublinCore

  `CONTRIBUTOR, COVERAGE, CREATOR, DATE, DESCRIPTION, FORMAT, IDENTIFIER, LANGUAGE, MODIFIED, PUBLISHER, RELATION, RIGHTS, SOURCE, SUBJECT, TITLE, TYPE`

  ### Fields inherited from interface org.apache.nutch.metadata.Feed

  `FEED, FEED_AUTHOR, FEED_PUBLISHED, FEED_TAGS, FEED_UPDATED`

  ### Fields inherited from interface org.apache.nutch.metadata.HttpHeaders

  `CLIENT_TRANSFER_ENCODING, CONTENT_DISPOSITION, CONTENT_ENCODING, CONTENT_LANGUAGE, CONTENT_LENGTH, CONTENT_LOCATION, CONTENT_MD5, CONTENT_TYPE, IF_MODIFIED_SINCE, LAST_MODIFIED, LOCATION, TRANSFER_ENCODING, USER_AGENT, WRITABLE_CONTENT_TYPE`

  ### Fields inherited from interface org.apache.nutch.metadata.Nutch

  `ARG_CRAWLDB, ARG_HOSTDB, ARG_LINKDB, ARG_SEEDDIR, ARG_SEGMENTDIR, ARG_SEGMENTS, CACHING_FORBIDDEN_ALL, CACHING_FORBIDDEN_CONTENT, CACHING_FORBIDDEN_KEY, CACHING_FORBIDDEN_NONE, CHAR_ENCODING_FOR_CONVERSION, CRAWL_ID_KEY, FETCH_EVENT_CONTENTLANG, FETCH_EVENT_CONTENTTYPE, FETCH_EVENT_FETCHTIME, FETCH_EVENT_SCORE, FETCH_EVENT_TITLE, FETCH_STATUS_KEY, FETCH_TIME_KEY, FIXED_INTERVAL_KEY, GENERATE_TIME_KEY, ORIGINAL_CHAR_ENCODING, PROTO_STATUS_KEY, PROTOCOL_STATUS_CODE_KEY, REPR_URL_KEY, ROBOTS_METATAG, SCORE_KEY, SEGMENT_NAME_KEY, SIGNATURE_KEY, STAT_PROGRESS, VAL_RESULT, WRITABLE_FIXED_INTERVAL_KEY, WRITABLE_GENERATE_TIME_KEY, WRITABLE_PROTO_STATUS_KEY, WRITABLE_REPR_URL_KEY`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `SpellCheckedMetadata()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `add(String name, String value)`
  Add a metadata name/value mapping.
  `String`
  `get(String name)`
  Get the value associated to a metadata name.
  `static String`
  `getNormalizedName(String name)`
  Get the normalized name of metadata attribute name.
  `String[]`
  `getValues(String name)`
  Get the values associated to a metadata name.
  `void`
  `remove(String name)`
  Remove a metadata and all its associated values.
  `void`
  `set(String name, String value)`
  Set metadata name/value.

  ### Methods inherited from class org.apache.nutch.metadata.Metadata

  `addAll, clear, equals, isMultiValued, names, readFields, setAll, size, toString, toString, write`

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

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

- ## Constructor Details

  - ### SpellCheckedMetadata

    public SpellCheckedMetadata()

- ## Method Details

  - ### getNormalizedName

    public static String getNormalizedName(String name)
    Get the normalized name of metadata attribute name. This method tries to find a well-known metadata name (one of the metadata names defined in this class) that matches the specified name. The matching is error tolerant. For instance,
    - content-type gives Content-Type
    - CoNtEntType gives Content-Type
    - ConTnTtYpe gives Content-Type
    If no matching with a well-known metadata name is found, then the original name is returned.
    Parameters:
      `name` - HTTP header name to normalize
    Returns:
      normalized HTTP header name

  - ### remove

    public void remove(String name)
    Description copied from class: `Metadata`
    Remove a metadata and all its associated values.
    Overrides:
      `remove` in class `Metadata`
    Parameters:
      `name` - metadata name to remove

  - ### add

    public void add(String name, String value)
    Description copied from class: `Metadata`
    Add a metadata name/value mapping. Add the specified value to the list of values associated to the specified metadata name.
    Overrides:
      `add` in class `Metadata`
    Parameters:
      `name` - the metadata name.
      `value` - the metadata value.

  - ### getValues

    public String[] getValues(String name)
    Description copied from class: `Metadata`
    Get the values associated to a metadata name.
    Overrides:
      `getValues` in class `Metadata`
    Parameters:
      `name` - of the metadata.
    Returns:
      the values associated to a metadata name.

  - ### get

    public String get(String name)
    Description copied from class: `Metadata`
    Get the value associated to a metadata name. If many values are associated to the specified name, then the first one is returned.
    Overrides:
      `get` in class `Metadata`
    Parameters:
      `name` - of the metadata.
    Returns:
      the value associated to the specified metadata name.

  - ### set

    public void set(String name, String value)
    Description copied from class: `Metadata`
    Set metadata name/value. Associate the specified value to the specified metadata name. If some previous values were associated to this name, they are removed.
    Overrides:
      `set` in class `Metadata`
    Parameters:
      `name` - the metadata name.
      `value` - the metadata value.