SCmp.java

/******************************************************************************
 * Copyright (C) 2012, 2013, 2014, 2015, 2016
 * Younghyung Cho. <yhcting77@gmail.com>
 * All rights reserved.
 *
 * This file is part of NetMBuddy
 *
 * This program is licensed under the FreeBSD license
 *
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 * modification, are permitted provided that the following conditions are
 * met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 *****************************************************************************/

package free.yhc.netmbuddy.scmp;

import free.yhc.baselib.Logger;
import free.yhc.netmbuddy.utils.Util;

public class SCmp {
    private static final boolean DBG = Logger.DBG_DEFAULT;
    private static final Logger P = Logger.create(SCmp.class, Logger.LOGLV_DEFAULT);

    private SCElemI mBaseElem;

    public void
    setCmpParameter(String baseStr, boolean enableLenDiff, SCmpPolicy policy) {
        SCElemSStr es = SCElemSStr.create(SCElemSStr.Type.EXACT_WORD, baseStr, null);
        es.setEnableLengthDiff(enableLenDiff);
        if (null != policy)
            es.setPolicy(policy);
        mBaseElem = es;
    }

    public float
    similarity(String s) {
        SCElemSStr es = SCElemSStr.create(SCElemSStr.Type.EXACT_WORD, s, null);
        // Performance drop but better accuracy
        float s0 =  mBaseElem.similarity(es);
        float s1 = es.similarity(mBaseElem);
        return Util.max(s0, s1);
    }

    @SuppressWarnings("unused")
    public static float
    similarity(String s0, String s1, boolean enableLenDiff, SCmpPolicy policy) {
        SCElemSStr estr0 = SCElemSStr.create(SCElemSStr.Type.EXACT_WORD, s0, null);
        SCElemSStr estr1 = SCElemSStr.create(SCElemSStr.Type.EXACT_WORD, s1, null);
        if (null != policy) {
            estr0.setPolicy(policy);
            estr1.setPolicy(policy);
        }
        float sim0 = estr0.similarity(estr1);
        float sim1 = estr1.similarity(estr0);
        return Util.max(sim0, sim1);
    }
}