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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 org.apache.commons.codec.language;

/**
 * Encodes a string into a Caverphone 1.0 value.
 *
 * This is an algorithm created by the Caversham Project at the University of Otago. It implements the Caverphone 1.0
 * algorithm:
 *
 * @see Wikipedia - Caverphone
 * @see Caverphone 1.0 specification
 * @since 1.5
 *
 * 

This class is immutable and thread-safe.

*/ public class Caverphone1 extends AbstractCaverphone { private static final String SIX_1 = "111111"; /** * Encodes the given String into a Caverphone value. * * @param source * String the source string * @return A caverphone code for the given String */ @Override public String encode(final String source) { String txt = source; if (txt == null || txt.length() == 0) { return SIX_1; } // 1. Convert to lowercase txt = txt.toLowerCase(java.util.Locale.ENGLISH); // 2. Remove anything not A-Z txt = txt.replaceAll("[^a-z]", ""); // 3. Handle various start options // 2 is a temporary placeholder to indicate a consonant which we are no longer interested in. txt = txt.replaceAll("^cough", "cou2f"); txt = txt.replaceAll("^rough", "rou2f"); txt = txt.replaceAll("^tough", "tou2f"); txt = txt.replaceAll("^enough", "enou2f"); txt = txt.replaceAll("^gn", "2n"); // End txt = txt.replaceAll("mb$", "m2"); // 4. Handle replacements txt = txt.replaceAll("cq", "2q"); txt = txt.replaceAll("ci", "si"); txt = txt.replaceAll("ce", "se"); txt = txt.replaceAll("cy", "sy"); txt = txt.replaceAll("tch", "2ch"); txt = txt.replaceAll("c", "k"); txt = txt.replaceAll("q", "k"); txt = txt.replaceAll("x", "k"); txt = txt.replaceAll("v", "f"); txt = txt.replaceAll("dg", "2g"); txt = txt.replaceAll("tio", "sio"); txt = txt.replaceAll("tia", "sia"); txt = txt.replaceAll("d", "t"); txt = txt.replaceAll("ph", "fh"); txt = txt.replaceAll("b", "p"); txt = txt.replaceAll("sh", "s2"); txt = txt.replaceAll("z", "s"); txt = txt.replaceAll("^[aeiou]", "A"); // 3 is a temporary placeholder marking a vowel txt = txt.replaceAll("[aeiou]", "3"); txt = txt.replaceAll("3gh3", "3kh3"); txt = txt.replaceAll("gh", "22"); txt = txt.replaceAll("g", "k"); txt = txt.replaceAll("s+", "S"); txt = txt.replaceAll("t+", "T"); txt = txt.replaceAll("p+", "P"); txt = txt.replaceAll("k+", "K"); txt = txt.replaceAll("f+", "F"); txt = txt.replaceAll("m+", "M"); txt = txt.replaceAll("n+", "N"); txt = txt.replaceAll("w3", "W3"); txt = txt.replaceAll("wy", "Wy"); // 1.0 only txt = txt.replaceAll("wh3", "Wh3"); txt = txt.replaceAll("why", "Why"); // 1.0 only txt = txt.replaceAll("w", "2"); txt = txt.replaceAll("^h", "A"); txt = txt.replaceAll("h", "2"); txt = txt.replaceAll("r3", "R3"); txt = txt.replaceAll("ry", "Ry"); // 1.0 only txt = txt.replaceAll("r", "2"); txt = txt.replaceAll("l3", "L3"); txt = txt.replaceAll("ly", "Ly"); // 1.0 only txt = txt.replaceAll("l", "2"); txt = txt.replaceAll("j", "y"); // 1.0 only txt = txt.replaceAll("y3", "Y3"); // 1.0 only txt = txt.replaceAll("y", "2"); // 1.0 only // 5. Handle removals txt = txt.replaceAll("2", ""); txt = txt.replaceAll("3", ""); // 6. put six 1s on the end txt = txt + SIX_1; // 7. take the first six characters as the code return txt.substring(0, SIX_1.length()); } }




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