001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.commons.codec.language;
019
020import org.apache.commons.codec.EncoderException;
021import org.apache.commons.codec.StringEncoder;
022
023/**
024 * Encodes a string into a Caverphone value.
025 *
026 * This is an algorithm created by the Caversham Project at the University of Otago. It implements the Caverphone 2.0
027 * algorithm:
028 *
029 * <p>This class is immutable and thread-safe.</p>
030 *
031 * @see <a href="http://en.wikipedia.org/wiki/Caverphone">Wikipedia - Caverphone</a>
032 * @since 1.5
033 */
034public abstract class AbstractCaverphone implements StringEncoder {
035
036    /**
037     * Creates an instance of the Caverphone encoder
038     */
039    public AbstractCaverphone() {
040        super();
041    }
042
043    /**
044     * Encodes an Object using the caverphone algorithm. This method is provided in order to satisfy the requirements of
045     * the Encoder interface, and will throw an EncoderException if the supplied object is not of type java.lang.String.
046     *
047     * @param source
048     *            Object to encode
049     * @return An object (or type java.lang.String) containing the caverphone code which corresponds to the String
050     *         supplied.
051     * @throws EncoderException
052     *             if the parameter supplied is not of type java.lang.String
053     */
054    @Override
055    public Object encode(final Object source) throws EncoderException {
056        if (!(source instanceof String)) {
057            throw new EncoderException("Parameter supplied to Caverphone encode is not of type java.lang.String");
058        }
059        return this.encode((String) source);
060    }
061
062    /**
063     * Tests if the encodings of two strings are equal.
064     *
065     * This method might be promoted to a new AbstractStringEncoder superclass.
066     *
067     * @param str1
068     *            First of two strings to compare
069     * @param str2
070     *            Second of two strings to compare
071     * @return <code>true</code> if the encodings of these strings are identical, <code>false</code> otherwise.
072     * @throws EncoderException
073     *             thrown if there is an error condition during the encoding process.
074     */
075    public boolean isEncodeEqual(final String str1, final String str2) throws EncoderException {
076        return this.encode(str1).equals(this.encode(str2));
077    }
078
079}