org.apache.lucene.search.uhighlight

## Class Passage

- java.lang.Object
- - org.apache.lucene.search.uhighlight.Passage

-     public class Passage
      extends Object

  Represents a passage (typically a sentence of the document).

  A passage contains `getNumMatches()` highlights from the query, and the offsets and query terms that correspond with each match.

  WARNING: This API is experimental and might change in incompatible ways in the next release.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `Passage()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addMatch(int startOffset, int endOffset, BytesRef term, int termFreqInDoc)`
    `int` | `getEndOffset()` End offset of this passage.
    `int` | `getLength()`
    `int[]` | `getMatchEnds()` End offsets of the term matches, corresponding with `getMatchStarts()`.
    `int[]` | `getMatchStarts()` Start offsets of the term matches, in increasing order.
    `int[]` | `getMatchTermFreqsInDoc()`
    `BytesRef[]` | `getMatchTerms()` BytesRef (term text) of the matches, corresponding with `getMatchStarts()`.
    `int` | `getNumMatches()` Number of term matches available in `getMatchStarts()`, `getMatchEnds()`, `getMatchTerms()`
    `float` | `getScore()` Passage's score.
    `int` | `getStartOffset()` Start offset of this passage.
    `void` | `reset()`
    `void` | `setEndOffset(int endOffset)`
    `void` | `setScore(float score)`
    `void` | `setStartOffset(int startOffset)`
    `String` | `toString()` For debugging.

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

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

- - ### Constructor Detail

    - #### Passage

          public Passage()

  - ### Method Detail

    - #### addMatch

          public void addMatch(int startOffset,
                               int endOffset,
                               BytesRef term,
                               int termFreqInDoc)

      NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

    - #### reset

          public void reset()

      NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

    - #### toString

          public String toString()

      For debugging. ex: Passage[0-22]{yin[0-3],yang[4-8],yin[10-13]}score=2.4964213
      Overrides:
        `toString` in class `Object`

    - #### getStartOffset

          public int getStartOffset()

      Start offset of this passage.
      Returns:
        start index (inclusive) of the passage in the original content: always >= 0.

    - #### getEndOffset

          public int getEndOffset()

      End offset of this passage.
      Returns:
        end index (exclusive) of the passage in the original content: always >= `getStartOffset()`

    - #### getLength

          public int getLength()

    - #### getScore

          public float getScore()

      Passage's score.

    - #### setScore

          public void setScore(float score)

    - #### getNumMatches

          public int getNumMatches()

      Number of term matches available in `getMatchStarts()`, `getMatchEnds()`, `getMatchTerms()`

    - #### getMatchStarts

          public int[] getMatchStarts()

      Start offsets of the term matches, in increasing order.

      Only `getNumMatches()` are valid. Note that these offsets are absolute (not relative to `getStartOffset()`).

    - #### getMatchEnds

          public int[] getMatchEnds()

      End offsets of the term matches, corresponding with `getMatchStarts()`.

      Only `getNumMatches()` are valid. Note that its possible that an end offset could exceed beyond the bounds of the passage (`getEndOffset()`), if the Analyzer produced a term which spans a passage boundary.

    - #### getMatchTerms

          public BytesRef[] getMatchTerms()

      BytesRef (term text) of the matches, corresponding with `getMatchStarts()`. The primary purpose of this method is to expose the number of unique terms per passage for use in passage scoring. The actual term byte content is not well defined by this highlighter, and thus use of it is more subject to change.

      The term might be simply the analyzed term at this position. Depending on the highlighter's configuration, the match term may be a phrase (instead of a word), and in such a case might be a series of space-separated analyzed terms. If the match is from a `MultiTermQuery` then the match term may be the toString() of that query.

      Only `getNumMatches()` are valid.

    - #### getMatchTermFreqsInDoc

          public int[] getMatchTermFreqsInDoc()

    - #### setStartOffset

          public void setStartOffset(int startOffset)

      NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

    - #### setEndOffset

          public void setEndOffset(int endOffset)

      NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

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