eu.interedition.collatex.input.SimpleWitness.java Source code

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Here is the source code for eu.interedition.collatex.input.SimpleWitness.java

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/**
 * CollateX - a Java library for collating textual sources,
 * for example, to produce an apparatus.
 *
 * Copyright (C) 2010 ESF COST Action "Interedition".
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package eu.interedition.collatex.input;

import com.google.common.base.Function;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import eu.interedition.collatex.Token;
import eu.interedition.collatex.Witness;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;

public class SimpleWitness implements Iterable<Token>, Witness {
    public static final SimpleWitness SUPERBASE = new SimpleWitness("");
    public static final Pattern PUNCT = Pattern.compile("\\p{Punct}");
    public static final Function<String, String> TOKEN_NORMALIZER = new Function<String, String>() {
        @Override
        public String apply(String input) {
            final String normalized = PUNCT.matcher(input.trim().toLowerCase()).replaceAll("");
            return (normalized == null || normalized.length() == 0 ? input : normalized);
        }
    };

    private static int nextId = 0;

    private final int id;
    private final String sigil;
    private final List<Token> tokens = new ArrayList<Token>();
    private final Map<Token, Token> relations = Maps.newLinkedHashMap();

    public SimpleWitness(String sigil) {
        synchronized (SimpleWitness.class) {
            this.id = (nextId == Integer.MAX_VALUE ? 0 : nextId++);
        }
        this.sigil = sigil;
    }

    public SimpleWitness(String sigil, String content, Function<String, List<String>> tokenizer) {
        this(sigil);
        setTokenContents(tokenizer.apply(content));
    }

    public int getId() {
        return id;
    }

    public List<Token> getTokens() {
        return tokens;
    }

    public void setTokenContents(List<String> tokenContents) {
        final List<Token> tokens = Lists.newArrayListWithExpectedSize(tokenContents.size());
        for (String content : tokenContents) {
            tokens.add(new SimpleToken(this, tokens.size(), content, TOKEN_NORMALIZER.apply(content)));
        }
        setTokens(tokens);
    }

    public void setTokens(List<Token> tokens) {
        this.tokens.clear();
        this.relations.clear();
        Token previous = SimpleToken.START;
        for (Token token : tokens) {
            this.tokens.add(token);
            this.relations.put(previous, token);
            previous = token;
        }
        relations.put(previous, SimpleToken.END);
    }

    @Override
    public String getSigil() {
        return sigil;
    }

    // TODO check whether iterator.remove() throws exception!
    @Override
    public Iterator<Token> iterator() {
        return tokens.iterator();
    }

    @Override
    public String toString() {
        return getSigil();
    }

    @Override
    public boolean isNear(Token a, Token b) {
        if (!relations.containsKey(a)) {
            throw new RuntimeException("Error; " + a + " is an unknown token! " + a.getClass());
        }
        Token other = relations.get(a);
        return other.equals(b);
    }
}