Class AbstractBottomUpParser

java.lang.Object
opennlp.tools.parser.AbstractBottomUpParser
All Implemented Interfaces:
opennlp.tools.parser.Parser
Direct Known Subclasses:
Parser, Parser
public abstract class AbstractBottomUpParser extends Object implements opennlp.tools.parser.Parser
Abstract class which contains code to tag and chunk parses for bottom up parsing and leaves implementation of advancing parses and completing parses to extend class.

Note:
The nodes within the returned parses are shared with other parses and therefore their parent node references will not be consistent with their child node reference. setParents can be used to make the parents consistent with a particular parse, but subsequent calls to setParents can invalidate the results of earlier calls.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final String
    COMPLETE
    Outcome used when a constituent is complete.
    static final String
    CONT
    Prefix for outcomes continuing a constituent.
    static final double
    defaultAdvancePercentage
    The default amount of probability mass required of advanced outcomes.
    static final int
    defaultBeamSize
    The default beam size used if no beam size is given.
    static final String
    INCOMPLETE
    Outcome used when a constituent is incomplete.
    static final String
    OTHER
    Outcome for token which is not contained in a basal constituent.
    static final String
    START
    Prefix for outcomes starting a constituent.

    Fields inherited from interface opennlp.tools.parser.Parser

    INC_NODE, TOK_NODE, TOP_NODE

  • Constructor Summary

    Constructors
    Constructor
    Description
    AbstractBottomUpParser(opennlp.tools.postag.POSTagger tagger, opennlp.tools.chunker.Chunker chunker, opennlp.tools.parser.HeadRules headRules, int beamSize, double advancePercentage)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static Dictionary
    buildDictionary(opennlp.tools.util.ObjectStream<opennlp.tools.parser.Parse> data, opennlp.tools.parser.HeadRules rules, int cutoff)
    Creates a n-gram Dictionary from the specified data stream using HeadRules and specified cut-off.
    static Dictionary
    buildDictionary(opennlp.tools.util.ObjectStream<opennlp.tools.parser.Parse> data, opennlp.tools.parser.HeadRules rules, opennlp.tools.util.TrainingParameters params)
    Creates a n-gram Dictionary from the specified data stream using the specified head rule and specified cut-off.
    static opennlp.tools.parser.Parse[]
    collapsePunctuation(opennlp.tools.parser.Parse[] chunks, Set<String> punctSet)
    Removes the punctuation from the specified set of chunks, adds it to the parses adjacent to the punctuation is specified, and returns a new array of parses with the punctuation removed.
    opennlp.tools.parser.Parse
    parse(opennlp.tools.parser.Parse tokens)
     
    opennlp.tools.parser.Parse[]
    parse(opennlp.tools.parser.Parse tokens, int numParses)
     
    void
    setErrorReporting(boolean errorReporting)
    Specifies whether the parser should report when it was unable to find a parse for a particular sentence.
    static void
    setParents(opennlp.tools.parser.Parse p)
    Assigns parent references for the specified parse so that they are consistent with the children references.

    Methods inherited from class Object

    equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • defaultBeamSize

      public static final int defaultBeamSize
      The default beam size used if no beam size is given.
      See Also:

    • defaultAdvancePercentage

      public static final double defaultAdvancePercentage
      The default amount of probability mass required of advanced outcomes.
      See Also:

    • START

      public static final String START
      Prefix for outcomes starting a constituent.
      See Also:

    • CONT

      public static final String CONT
      Prefix for outcomes continuing a constituent.
      See Also:

    • OTHER

      public static final String OTHER
      Outcome for token which is not contained in a basal constituent.
      See Also:

    • COMPLETE

      public static final String COMPLETE
      Outcome used when a constituent is complete.
      See Also:

    • INCOMPLETE

      public static final String INCOMPLETE
      Outcome used when a constituent is incomplete.
      See Also:

  • Constructor Details

    • AbstractBottomUpParser

      public AbstractBottomUpParser(opennlp.tools.postag.POSTagger tagger, opennlp.tools.chunker.Chunker chunker, opennlp.tools.parser.HeadRules headRules, int beamSize, double advancePercentage)

  • Method Details

    • setErrorReporting

      public void setErrorReporting(boolean errorReporting)
      Specifies whether the parser should report when it was unable to find a parse for a particular sentence.
      Parameters:
      errorReporting - true if un-parsed sentences should be reported, false otherwise.

    • setParents

      public static void setParents(opennlp.tools.parser.Parse p)
      Assigns parent references for the specified parse so that they are consistent with the children references.
      Parameters:
      p - The Parse whose parent references need to be assigned.

    • collapsePunctuation

      public static opennlp.tools.parser.Parse[] collapsePunctuation(opennlp.tools.parser.Parse[] chunks, Set<String> punctSet)
      Removes the punctuation from the specified set of chunks, adds it to the parses adjacent to the punctuation is specified, and returns a new array of parses with the punctuation removed.
      Parameters:
      chunks - A set of parses.
      punctSet - The set of punctuation to be removed.
      Returns:
      Array of parses which is a subset of chunks with punctuation removed.

    • parse

      public opennlp.tools.parser.Parse[] parse(opennlp.tools.parser.Parse tokens, int numParses)
      Specified by:
      parse in interface opennlp.tools.parser.Parser

    • parse

      public opennlp.tools.parser.Parse parse(opennlp.tools.parser.Parse tokens)
      Specified by:
      parse in interface opennlp.tools.parser.Parser

    • buildDictionary

      public static Dictionary buildDictionary(opennlp.tools.util.ObjectStream<opennlp.tools.parser.Parse> data, opennlp.tools.parser.HeadRules rules, opennlp.tools.util.TrainingParameters params) throws IOException
      Creates a n-gram Dictionary from the specified data stream using the specified head rule and specified cut-off.
      Parameters:
      data - The data stream of parses.
      rules - The HeadRules for the parses.
      params - The TrainingParameters which can contain a cutoff, the minimum number of entries required for the n-gram to be saved as part of the Dictionary.
      Returns:
      A Dictionary instance.
      Throws:
      IOException

    • buildDictionary

      public static Dictionary buildDictionary(opennlp.tools.util.ObjectStream<opennlp.tools.parser.Parse> data, opennlp.tools.parser.HeadRules rules, int cutoff) throws IOException
      Creates a n-gram Dictionary from the specified data stream using HeadRules and specified cut-off.
      Parameters:
      data - The data stream of parses.
      rules - The HeadRules for the parses.
      cutoff - The minimum number of entries required for the n-gram to be saved as part of the dictionary.
      Returns:
      A Dictionary instance.
      Throws:
      IOException