ElementDictionary.java

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
 *
 * The Initial Developer of the Original Code is
 * Agfa Healthcare.
 * Portions created by the Initial Developer are Copyright (C) 2011
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * See @authors listed below
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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package org.dcm4che3.data;

import java.util.ServiceLoader;

import org.dcm4che3.data.StandardElementDictionary;

public abstract class ElementDictionary {
    private static final ServiceLoader<ElementDictionary> loader =
            ServiceLoader.load(ElementDictionary.class);
    private final String privateCreator;
    private final Class<?> tagClass;

    protected ElementDictionary(String privateCreator, Class<?> tagClass) {
        this.privateCreator = privateCreator;
        this.tagClass = tagClass;
    }

    public static ElementDictionary getStandardElementDictionary() {
        return StandardElementDictionary.INSTANCE;
    }

    public static ElementDictionary getElementDictionary(
            String privateCreator) {
        if (privateCreator != null)
            synchronized (loader) {
                for (ElementDictionary dict : loader)
                    if (privateCreator.equals(dict.getPrivateCreator()))
                        return dict;
            }
        return getStandardElementDictionary();
    }

    public static void reload() {
        synchronized (loader) {
            loader.reload();
        }
    }

    public static VR vrOf(int tag, String privateCreator) {
        return getElementDictionary(privateCreator).vrOf(tag);
    }

    public static String keywordOf(int tag, String privateCreator) {
        return getElementDictionary(privateCreator).keywordOf(tag);
    }

    public static int tagForKeyword(String keyword, String privateCreatorID) {
        return getElementDictionary(privateCreatorID).tagForKeyword(keyword);
    }

    public final String getPrivateCreator() {
        return privateCreator;
    }

    public Class<?> getTagClass() {
        return tagClass;
    }

    public abstract VR vrOf(int tag);

    public abstract String keywordOf(int tag);

    public int tmTagOf(int daTag) {
        return 0;
    }

    public int daTagOf(int tmTag) {
        return 0;
    }

    public int tagForKeyword(String keyword) {
        if (tagClass != null)
            try {
                return tagClass.getField(keyword).getInt(null);
            } catch (Exception ignore) { }
        return -1;
    }
}