node-wordnet/src/data_file.coffee

Node.js interface for Wordnet

## Copyright (c) 2011, Chris Umbel
## 
## Permission is hereby granted, free of charge, to any person obtaining a copy
## of this software and associated documentation files (the "Software"), to deal
## in the Software without restriction, including without limitation the rights
## to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
## copies of the Software, and to permit persons to whom the Software is
## furnished to do so, subject to the following conditions:
## 
## The above copyright notice and this permission notice shall be included in
## all copies or substantial portions of the Software.
## 
## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
## IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
## AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
## LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
## OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
## THE SOFTWARE.

WordNetFile = require('./wordnet_file')
fs = require('fs')
util = require('util')


get = (location, callback) ->
  buff = new Buffer(4096)

  @open (err, fd) ->
    WordNetFile.appendLineChar fd, location, 0, buff, (line) ->
      data = line.split('| ')
      tokens = data[0].split(/\s+/)
      ptrs = []
      wCnt = parseInt(tokens[3], 16)
      synonyms = []

      for i in [0..wCnt - 1] by 1
        synonyms.push(tokens[4 + i * 2]);

      ptrOffset = (wCnt - 1) * 2 + 6
      for i in [0..parseInt(tokens[ptrOffset], 10) - 1] by 1
        ptrs.push {
          pointerSymbol: tokens[ptrOffset + 1 + i * 4]
          synsetOffset: parseInt(tokens[ptrOffset + 2 + i * 4], 10)
          pos: tokens[ptrOffset + 3 + i * 4]
          sourceTarget: tokens[ptrOffset + 4 + i * 4]
        }

      ## break "gloss" into definition vs. examples
      glossArray = data[1].split("; ")
      definition = glossArray[0]
      examples = glossArray.slice(1)

      for element, k in examples
        examples[k] = examples[k].replace(/\"/g,'').replace(/\s\s+/g,'')

      callback {
        synsetOffset: parseInt(tokens[0], 10)
        lexFilenum: parseInt(tokens[1], 10)
        pos: tokens[2]
        wCnt: wCnt
        lemma: tokens[4]
        synonyms: synonyms
        lexId: tokens[5]
        ptrs: ptrs
        gloss: data[1]
        def: definition
        exp: examples
      }


DataFile = (dataDir, name) ->
  WordNetFile.call(this, dataDir, 'data.' + name)

util.inherits(DataFile, WordNetFile)
DataFile.prototype.get = get

module.exports = DataFile