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Java example source code file (FingerPrintKeyer.java)

This example Java source code file (FingerPrintKeyer.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

ascii, fingerprintkeyer, illegalargumentexception, iterator, object, pattern, punct, regex, string, stringbuilder, treeset, util

The FingerPrintKeyer.java Java example source code

/*
 *
 *  * Copyright 2015 Skymind,Inc.
 *  *
 *  *    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 org.deeplearning4j.util;


import java.util.Collections;
import java.util.Iterator;
import java.util.TreeSet;
import java.util.regex.Pattern;

import org.apache.commons.lang3.StringUtils;
/**
 * Copied from google refine:
 * takes the key and gets rid of all punctuation, transforms to lower case
 * and alphabetic sorts the words
 * @author Adam Gibson
 *
 */
public class FingerPrintKeyer  {

    // Punctuation and control characters (except for TAB which we need for split to work)
    static final Pattern punctctrl = Pattern.compile("\\p{Punct}|[\\x00-\\x08\\x0A-\\x1F\\x7F]");

    public String key(String s, Object... o) {
        if (s == null || o !=null && o.length > 0) {
            throw new IllegalArgumentException("Fingerprint keyer accepts a single string parameter");
        }
        s = s.trim(); // first off, remove whitespace around the string
        s = s.toLowerCase(); // then lowercase it
        s = punctctrl.matcher(s).replaceAll(""); // then remove all punctuation and control chars
        String[] frags = StringUtils.split(s); // split by whitespace
        TreeSet<String> set = new TreeSet<>();
        Collections.addAll(set, frags);
        StringBuilder b = new StringBuilder();
        Iterator<String> i = set.iterator();
        while (i.hasNext()) {  // join ordered fragments back together
            b.append(i.next());
            if (i.hasNext()) {
                b.append(' ');
            }
        }
        return asciify(b.toString()); // find ASCII equivalent to characters 
    }

    protected String asciify(String s) {
        char[] c = s.toCharArray();
        StringBuilder b = new StringBuilder();
        for (char element : c) {
            b.append(translate(element));
        }
        return b.toString();
    }

    /**
     * Translate the given unicode char in the closest ASCII representation
     * NOTE: this function deals only with latin-1 supplement and latin-1 extended code charts
     */
    private char translate(char c) {
        switch(c) {
            case '\u00C0':
            case '\u00C1':
            case '\u00C2':
            case '\u00C3':
            case '\u00C4':
            case '\u00C5':
            case '\u00E0':
            case '\u00E1':
            case '\u00E2':
            case '\u00E3':
            case '\u00E4':
            case '\u00E5':
            case '\u0100':
            case '\u0101':
            case '\u0102':
            case '\u0103':
            case '\u0104':
            case '\u0105':
                return 'a';
            case '\u00C7':
            case '\u00E7':
            case '\u0106':
            case '\u0107':
            case '\u0108':
            case '\u0109':
            case '\u010A':
            case '\u010B':
            case '\u010C':
            case '\u010D':
                return 'c';
            case '\u00D0':
            case '\u00F0':
            case '\u010E':
            case '\u010F':
            case '\u0110':
            case '\u0111':
                return 'd';
            case '\u00C8':
            case '\u00C9':
            case '\u00CA':
            case '\u00CB':
            case '\u00E8':
            case '\u00E9':
            case '\u00EA':
            case '\u00EB':
            case '\u0112':
            case '\u0113':
            case '\u0114':
            case '\u0115':
            case '\u0116':
            case '\u0117':
            case '\u0118':
            case '\u0119':
            case '\u011A':
            case '\u011B':
                return 'e';
            case '\u011C':
            case '\u011D':
            case '\u011E':
            case '\u011F':
            case '\u0120':
            case '\u0121':
            case '\u0122':
            case '\u0123':
                return 'g';
            case '\u0124':
            case '\u0125':
            case '\u0126':
            case '\u0127':
                return 'h';
            case '\u00CC':
            case '\u00CD':
            case '\u00CE':
            case '\u00CF':
            case '\u00EC':
            case '\u00ED':
            case '\u00EE':
            case '\u00EF':
            case '\u0128':
            case '\u0129':
            case '\u012A':
            case '\u012B':
            case '\u012C':
            case '\u012D':
            case '\u012E':
            case '\u012F':
            case '\u0130':
            case '\u0131':
                return 'i';
            case '\u0134':
            case '\u0135':
                return 'j';
            case '\u0136':
            case '\u0137':
            case '\u0138':
                return 'k';
            case '\u0139':
            case '\u013A':
            case '\u013B':
            case '\u013C':
            case '\u013D':
            case '\u013E':
            case '\u013F':
            case '\u0140':
            case '\u0141':
            case '\u0142':
                return 'l';
            case '\u00D1':
            case '\u00F1':
            case '\u0143':
            case '\u0144':
            case '\u0145':
            case '\u0146':
            case '\u0147':
            case '\u0148':
            case '\u0149':
            case '\u014A':
            case '\u014B':
                return 'n';
            case '\u00D2':
            case '\u00D3':
            case '\u00D4':
            case '\u00D5':
            case '\u00D6':
            case '\u00D8':
            case '\u00F2':
            case '\u00F3':
            case '\u00F4':
            case '\u00F5':
            case '\u00F6':
            case '\u00F8':
            case '\u014C':
            case '\u014D':
            case '\u014E':
            case '\u014F':
            case '\u0150':
            case '\u0151':
                return 'o';
            case '\u0154':
            case '\u0155':
            case '\u0156':
            case '\u0157':
            case '\u0158':
            case '\u0159':
                return 'r';
            case '\u015A':
            case '\u015B':
            case '\u015C':
            case '\u015D':
            case '\u015E':
            case '\u015F':
            case '\u0160':
            case '\u0161':
            case '\u017F':
                return 's';
            case '\u0162':
            case '\u0163':
            case '\u0164':
            case '\u0165':
            case '\u0166':
            case '\u0167':
                return 't';
            case '\u00D9':
            case '\u00DA':
            case '\u00DB':
            case '\u00DC':
            case '\u00F9':
            case '\u00FA':
            case '\u00FB':
            case '\u00FC':
            case '\u0168':
            case '\u0169':
            case '\u016A':
            case '\u016B':
            case '\u016C':
            case '\u016D':
            case '\u016E':
            case '\u016F':
            case '\u0170':
            case '\u0171':
            case '\u0172':
            case '\u0173':
                return 'u';
            case '\u0174':
            case '\u0175':
                return 'w';
            case '\u00DD':
            case '\u00FD':
            case '\u00FF':
            case '\u0176':
            case '\u0177':
            case '\u0178':
                return 'y';
            case '\u0179':
            case '\u017A':
            case '\u017B':
            case '\u017C':
            case '\u017D':
            case '\u017E':
                return 'z';
        }
        return c;
    }
}

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