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/*
 * This file is part of the OWL API.
 *
 * The contents of this file are subject to the LGPL License, Version 3.0.
 *
 * Copyright (C) 2011, The University of Manchester
 *
 * 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/.
 *
 *
 * Alternatively, the contents of this file may be used under the terms of the Apache License, Version 2.0
 * in which case, the provisions of the Apache License Version 2.0 are applicable instead of those above.
 *
 * Copyright 2011, University of Manchester
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.semanticweb.owlapi.io;

import java.io.Serializable;

import org.semanticweb.owlapi.model.OWLLiteral;

/**
 * @author Matthew Horridge, The University of Manchester, Bio-Health
 *         Informatics Group, Date: 21/12/2010
 * @since 3.2
 */
public class RDFLiteral extends RDFNode implements Serializable {

    private static final long serialVersionUID = 30406L;
    private final OWLLiteral literal;

    /**
     * @param literal
     *        the wrapped literal
     */
    public RDFLiteral(OWLLiteral literal) {
        this.literal = literal;
    }

    /**
     * @return the OWLLiteral
     */
    public OWLLiteral getLiteral() {
        return literal;
    }

    @Override
    public boolean isLiteral() {
        return true;
    }

    @Override
    public int hashCode() {
        return literal.hashCode();
    }

    @Override
    public boolean equals(Object o) {
        if (o == this) {
            return true;
        }
        if (!(o instanceof RDFLiteral)) {
            return false;
        }
        RDFLiteral other = (RDFLiteral) o;
        return literal.equals(other.literal);
    }

    @Override
    public String toString() {
        return literal.toString();
    }

    @Override
    public int compareTo(RDFNode o) {
        if (!o.isLiteral()) {
            return -1;
        }
        if (equals(o)) {
            return 0;
        }
        int diff = 0;
        RDFLiteral lit2 = (RDFLiteral) o;
        diff = literal.getLiteral().compareTo(lit2.literal.getLiteral());
        if (diff == 0) {
            diff = literal.getDatatype().compareTo(lit2.literal.getDatatype());
        }
        if (diff == 0) {
            diff = literal.getLang().compareTo(lit2.literal.getLang());
        }
        return diff;
    }
}