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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.model;

import java.io.Serializable;
import java.util.Map;
import java.util.Set;


/**
 * Author: Matthew Horridge
 The University Of Manchester
 Information Management Group
 Date:
 * 10-Sep-2008


 * 
 * A prefix manager than can provide prefixes for prefix names.
 */
public interface PrefixManager extends Serializable {

    /**
     * Gets the default prefix.  The default prefix is denoted by the prefix name ":"
     * @return The default prefix, or null if there is no default prefix.
     */
    String getDefaultPrefix();


    /**
     * Determines if this manager knows about a given prefix name and it contains a (non-null) mapping for the
     * prefix.
     * @param prefixName The prefix name to be tested for.
     * @return true if the manager knows about this prefix and there is a non-null mapping for this
     *         prefix.
     */
    boolean containsPrefixMapping(String prefixName);


    /**
     * Gets the prefix that is bound to a particular prefix name.  Note that specifying ":" corresponds to
     * requesting the default prefix and will return the same result as a call to the getDefaultPrefix()
     * method.
     * @param prefixName The prefix  name. A string that represents a prefix name of the prefix to be retrieved.
     * Note that specifying ":" is the same as asking for the default prefix (see the
     * getDefaultPrefix() method).
     * @return The prefix, or null if there is no prefix name bound to this prefix, or the prefix name doesn't
     *         exist.
     */
    String getPrefix(String prefixName);


    /**
     * Gets a map that maps prefix names to prefixes.
     * @return The map of prefix names to prefixes.  Note that modifying the contents of this map will not change the
     *         prefix name - prefix mappings
     */
    Map getPrefixName2PrefixMap();


    /**
     * Gets the URI for a given prefix IRI.  The prefix IRI must have a prefix name that is registered with this
     * manager, or a runtime exception will be thrown.
     * @param prefixIRI The Prefix IRI
     * @return The full IRI.
     * @throws OWLRuntimeException if the prefix name of the prefix IRI doesn't have a corresponding prefix managed by this
     *                             manager.
     */
    IRI getIRI(String prefixIRI);

    /**
     * Gets the prefix IRI given a IRI (URI).
     * @param iri The IRI whose prefix it to be retrieved
     * @return The prefix IRI for this IRI, or null if a prefix IRI cannot be generated.
     */
    String getPrefixIRI(IRI iri);

    /**
     * Gets the prefix names that have a mapping in this prefix manager
     * @return The prefix names as a set of strings.
     */
    Set getPrefixNames();
}