opennlp.tools.parse_thicket.apps.MostFrequentWordsFromPageGetter.java Source code

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Here is the source code for opennlp.tools.parse_thicket.apps.MostFrequentWordsFromPageGetter.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 opennlp.tools.parse_thicket.apps;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;
import java.util.TreeMap;

import org.apache.commons.lang.StringUtils;

import opennlp.tools.similarity.apps.utils.ValueSortMap;

public class MostFrequentWordsFromPageGetter {

    public List<String> getMostFrequentWordsInText(String input) {
        int maxRes = 4;
        Scanner in = new Scanner(input);
        in.useDelimiter("\\s+");
        Map<String, Integer> words = new HashMap<String, Integer>();

        while (in.hasNext()) {
            String word = in.next();
            if (!StringUtils.isAlpha(word) || word.length() < 4)
                continue;

            if (!words.containsKey(word)) {
                words.put(word, 1);
            } else {
                words.put(word, words.get(word) + 1);
            }
        }

        words = ValueSortMap.sortMapByValue(words, false);
        List<String> results = new ArrayList<String>(words.keySet());

        if (results.size() > maxRes)
            results = results.subList(0, maxRes); // get maxRes elements

        return results;
    }

    public List<String> getMostFrequentWordsInTextArr(String[] longestSents) {
        StringBuffer buffer = new StringBuffer();
        for (String s : longestSents) {
            buffer.append(s);
        }

        return getMostFrequentWordsInText(buffer.toString());
    }

}