wordmap/dist/index/PermutationIndex.js

Multi-Lingual Word Alignment Prediction

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const AlignmentIndex_1 = require("./AlignmentIndex");
const NgramIndex_1 = require("./NgramIndex");
/**
 * A collection of indexes on the permutation of possible alignments.
 */
class PermutationIndex {
    constructor() {
        this.alignPermFreqIndex = new AlignmentIndex_1.default();
        this.srcNgramPermFreqIndex = new NgramIndex_1.default();
        this.tgtNgramPermFreqIndex = new NgramIndex_1.default();
    }
    /**
     * Returns an index of alignment frequencies in the permutations
     */
    get alignmentFrequency() {
        return this.alignPermFreqIndex;
    }
    /**
     * Returns an index of source n-gram frequencies in the permutations
     * @return {NgramIndex}
     */
    get sourceNgramFrequency() {
        return this.srcNgramPermFreqIndex;
    }
    /**
     * Returns an index of target n-gram frequencies in the permutations
     * @return {NgramIndex}
     */
    get targetNgramFrequency() {
        return this.tgtNgramPermFreqIndex;
    }
    /**
     * Adds a sentence alignment to the index.
     * @param {Alignment[]} alignments - an array of alignments to add
     */
    addAlignments(alignments) {
        for (let i = 0, len = alignments.length; i < len; i++) {
            this.addAlignment(alignments[i]);
        }
    }
    /**
     * Adds a single alignment to the index
     * @param alignment
     */
    addAlignment(alignment) {
        // alignment frequency in permutations
        this.alignPermFreqIndex.increment(alignment);
        // n-gram frequency in permutations
        this.srcNgramPermFreqIndex.increment(alignment.sourceNgram);
        this.tgtNgramPermFreqIndex.increment(alignment.targetNgram);
    }
}
exports.default = PermutationIndex;