exactphrasematch.java

一个自然语言处理的Java开源工具包。LingPipe目前已有很丰富的功能

/*
 * LingPipe v. 3.5
 * Copyright (C) 2003-2008 Alias-i
 *
 * This program is licensed under the Alias-i Royalty Free License
 * Version 1 WITHOUT ANY WARRANTY, without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the Alias-i
 * Royalty Free License Version 1 for more details.
 * 
 * You should have received a copy of the Alias-i Royalty Free License
 * Version 1 along with this program; if not, visit
 * http://alias-i.com/lingpipe/licenses/lingpipe-license-1.txt or contact
 * Alias-i, Inc. at 181 North 11th Street, Suite 401, Brooklyn, NY 11211,
 * [phone].
 */

package com.aliasi.coref.matchers;

import com.aliasi.coref.BooleanMatcherAdapter;
import com.aliasi.coref.Mention;
import com.aliasi.coref.MentionChain;
import java.util.Iterator;

/**
 * Implements a matching function that returns the score
 * specified in the constructor if there is a match
 * between the normal phrases of the mention and one of
 * the mentions in the mention chain.
 *
 * @author  Bob Carpenter
 * @version 1.0
 * @since   LingPipe1.0
 */
public final class ExactPhraseMatch extends BooleanMatcherAdapter {

    /**
     * Construct an instance of an exact phrase matcher that
     * returns the specified score if there is a match.
     *
     * @param score Score to return if there is a match.
     */
    public ExactPhraseMatch(int score) {
        super(score);
    }

    /**
     * Returns <code>true</code> if the normal phrase of the mention
     * is equal to the normal phrase of a mention in the mention chain.
     *
     * @param mention Mention to match.
     * @param chain Mention chain to match.
     * @return <code>true</code> if the normal phrase of the mention
     * is equal to the normal phrase of a mention in the mention
     * chain.
     */
    public boolean matchBoolean(Mention mention, MentionChain chain) {
        if (mention.isPronominal()) return false;
        String mentionPhrase = mention.normalPhrase();
	Iterator chainMentions = chain.mentions().iterator();
        while (chainMentions.hasNext()) {
	    Mention chainMention = (Mention) chainMentions.next();
            if (mentionPhrase.equals(chainMention.normalPhrase())) 
		return true;
	}
        return false;
    }

}