org.apache.lucene.search.vectorhighlight

## Class BaseFragListBuilder

- java.lang.Object
- - org.apache.lucene.search.vectorhighlight.BaseFragListBuilder

- All Implemented Interfaces:
    FragListBuilder
  Direct Known Subclasses:
    SimpleFragListBuilder, WeightedFragListBuilder

      public abstract class BaseFragListBuilder
      extends Object
      implements FragListBuilder

  A abstract implementation of `FragListBuilder`.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static int` | `MARGIN_DEFAULT`
    `static int` | `MIN_FRAG_CHAR_SIZE_FACTOR`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `BaseFragListBuilder()`
    `BaseFragListBuilder(int margin)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected boolean` | `acceptPhrase(FieldPhraseList.WeightedPhraseInfo info, int matchLength, int fragCharSize)` A predicate to decide if the given `FieldPhraseList.WeightedPhraseInfo` should be accepted as a highlighted phrase or if it should be discarded.
    `protected FieldFragList` | `createFieldFragList(FieldPhraseList fieldPhraseList, FieldFragList fieldFragList, int fragCharSize)`

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

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

    - ### Methods inherited from interface org.apache.lucene.search.vectorhighlight.FragListBuilder

      `createFieldFragList`

- - ### Field Detail

    - #### MARGIN_DEFAULT

          public static final int MARGIN_DEFAULT

      See Also:
        Constant Field Values

    - #### MIN_FRAG_CHAR_SIZE_FACTOR

          public static final int MIN_FRAG_CHAR_SIZE_FACTOR

      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### BaseFragListBuilder

          public BaseFragListBuilder(int margin)

    - #### BaseFragListBuilder

          public BaseFragListBuilder()

  - ### Method Detail

    - #### createFieldFragList

          protected FieldFragList createFieldFragList(FieldPhraseList fieldPhraseList,
                                                      FieldFragList fieldFragList,
                                                      int fragCharSize)

    - #### acceptPhrase

          protected boolean acceptPhrase(FieldPhraseList.WeightedPhraseInfo info,
                                         int matchLength,
                                         int fragCharSize)

      A predicate to decide if the given `FieldPhraseList.WeightedPhraseInfo` should be accepted as a highlighted phrase or if it should be discarded.

      The default implementation discards phrases that are composed of more than one term and where the matchLength exceeds the fragment character size.

      Parameters:
        `info` - the phrase info to accept
        `matchLength` - the match length of the current phrase
        `fragCharSize` - the configured fragment character size
      Returns:
        `true` if this phrase info should be accepted as a highligh phrase

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