com.ibm.watson.catalyst.corpus.tfidf.term.Term.java Source code

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Here is the source code for com.ibm.watson.catalyst.corpus.tfidf.term.Term.java

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/*******************************************************************************
 * Copyright 2015 IBM Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.ibm.watson.catalyst.corpus.tfidf.term;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

public class Term {

    public Term(JsonNode aNode) {
        _term = aNode.get("string").asText();
        _frequency = aNode.get("frequency").asInt();
        _idf = aNode.get("tfidf").asDouble();
    }

    public Term(String aTerm, int aFrequency, double aIdf) {
        _term = aTerm.substring(0, 1).toUpperCase() + aTerm.substring(1);
        _frequency = aFrequency;
        _idf = aIdf;
        //_pattern = Pattern.compile("\\b" + _term + "\\b", Pattern.CASE_INSENSITIVE);
    }

    public Term(String aTerm, int aFrequency) {
        this(aTerm, aFrequency, 0.0);
    }

    public Term(String aTerm) {
        this(aTerm, 1);
    }

    public Term(Term t1) {
        _term = t1.getTerm();
        _frequency = t1.getFrequency();
        _idf = 0.0;
        //_pattern = Pattern.compile("\\b" + _term + "\\b", Pattern.CASE_INSENSITIVE);
    }

    public Term(Term t1, Term t2) {
        assert (t1.equals(t2));
        _term = t1.getTerm();
        _frequency = t1.getFrequency() + t2.getFrequency();
        _idf = 0.0;
        //_pattern = Pattern.compile("\\b" + _term + "\\b", Pattern.CASE_INSENSITIVE);
    }

    public String getTerm() {
        return _term;
    }

    public int getFrequency() {
        return _frequency;
    }

    public double getIdf() {
        return _idf;
    }
    //public Pattern getPattern() { return _pattern; }

    @Override
    public boolean equals(Object o) {
        return o.toString().equals(_term);
    }

    public String toString() {
        return _term;
    }

    public ObjectNode toObjectNode() {
        ObjectNode on = MAPPER.createObjectNode();
        on.put("term", _term);
        on.put("frequency", _frequency);
        on.put("tfidf", _idf);
        return on;
    }

    // ------------------------------------------------------------------------------------------ //
    // Private
    // ------------------------------------------------------------------------------------------ //
    private final String _term;
    private final int _frequency;
    private double _idf;
    private static final ObjectMapper MAPPER = new ObjectMapper();
    //private final Pattern _pattern;

}