eu.interedition.collatex.simple.SimpleToken.java Source code

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Here is the source code for eu.interedition.collatex.simple.SimpleToken.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.simple;

import com.google.common.base.Objects;
import com.google.common.base.Preconditions;
import com.google.common.collect.Iterables;
import eu.interedition.collatex.Witness;
import eu.interedition.collatex.Token;

public class SimpleToken implements Token, Comparable<SimpleToken> {
    public static int nextId = 0;
    public static final SimpleToken START = new SimpleToken(SimpleWitness.SUPERBASE, -1, "", "#");
    public static final SimpleToken END = new SimpleToken(SimpleWitness.SUPERBASE, Integer.MAX_VALUE, "", "#");

    private final int id;
    private Witness witness;
    private int index;
    private String content;
    private String normalized;

    public SimpleToken(Witness witness, int index, String content, String normalized) {
        synchronized (SimpleToken.class) {
            this.id = (nextId == Integer.MAX_VALUE ? 0 : nextId++);
        }
        this.witness = witness;
        this.index = index;
        this.content = content;
        this.normalized = normalized;
    }

    public int getId() {
        return id;
    }

    public int getIndex() {
        return index;
    }

    public String getContent() {
        return content;
    }

    @Override
    public Witness getWitness() {
        return witness;
    }

    public String getNormalized() {
        return normalized;
    }

    @Override
    public String toString() {
        return new StringBuilder(witness.toString()).append(":").append(index).append(":'").append(normalized)
                .append("'").toString();
    }

    public static String toString(Iterable<? extends Token> tokens) {
        final StringBuilder normalized = new StringBuilder();
        for (SimpleToken token : Iterables.filter(tokens, SimpleToken.class)) {
            normalized.append(token.getNormalized()).append(" ");
        }
        return normalized.toString().trim();
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(getIndex(), getWitness());
    }

    @Override
    public boolean equals(Object obj) {
        if (obj != null && obj instanceof SimpleToken) {
            final SimpleToken other = (SimpleToken) obj;
            return getIndex() == other.getIndex() && getWitness().equals(other.getWitness());
        }
        return super.equals(obj);
    }

    @Override
    public int compareTo(SimpleToken o) {
        Preconditions.checkArgument(witness.equals(o.getWitness()));
        return (index - o.index);
    }
}