001/*
002 * #%L
003 * HAPI FHIR - Core Library
004 * %%
005 * Copyright (C) 2014 - 2025 Smile CDR, Inc.
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 *
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package ca.uhn.fhir.model.api;
021
022import org.hl7.fhir.instance.model.api.IBaseDatatype;
023
024import java.util.List;
025
026public interface ISupportsUndeclaredExtensions extends IElement {
027
028        /**
029         * Returns a list containing all undeclared non-modifier extensions. The returned list
030         * is mutable, so it may be modified (e.g. to add or remove an extension).
031         */
032        List<ExtensionDt> getUndeclaredExtensions();
033
034        /**
035         * Returns an <b>immutable</b> list containing all undeclared extensions (modifier and non-modifier) by extension URL
036         *
037         * @see #getUndeclaredExtensions() To return a mutable list which may be used to remove extensions
038         */
039        List<ExtensionDt> getUndeclaredExtensionsByUrl(String theUrl);
040
041        /**
042         * Returns an <b>immutable</b> list containing all extensions (modifier and non-modifier).
043         *
044         * @see #getUndeclaredExtensions() To return a mutable list which may be used to remove undeclared non-modifier extensions
045         * @see #getUndeclaredModifierExtensions() To return a mutable list which may be used to remove undeclared modifier extensions
046         */
047        List<ExtensionDt> getAllUndeclaredExtensions();
048
049        /**
050         * Returns a list containing all undeclared modifier extensions. The returned list
051         * is mutable, so it may be modified (e.g. to add or remove an extension).
052         */
053        List<ExtensionDt> getUndeclaredModifierExtensions();
054
055        /**
056         * Adds an extension to this object. This extension should have the
057         * following properties set:
058         * <ul>
059         * <li>{@link ExtensionDt#setModifier(boolean) Is Modifier}</li>
060         * <li>{@link ExtensionDt#setUrl(String) URL}</li>
061         * <li>And one of:
062         * <ul>
063         * <li>{@link ExtensionDt#setValue(IBaseDatatype) A datatype value}</li>
064         * <li>{@link #addUndeclaredExtension(ExtensionDt) Further sub-extensions}</li>
065         * </ul>
066         * </ul>
067         *
068         * @param theExtension The extension to add. Can not be null.
069         */
070        void addUndeclaredExtension(ExtensionDt theExtension);
071
072        /**
073         * Adds an extension to this object
074         *
075         * @see #getUndeclaredExtensions() To return a mutable list which may be used to remove extensions
076         */
077        ExtensionDt addUndeclaredExtension(boolean theIsModifier, String theUrl, IBaseDatatype theValue);
078
079        /**
080         * Adds an extension to this object. This method is intended for use when
081         * an extension is being added which will contain child extensions, as opposed to
082         * a datatype.
083         *
084         * @see #getUndeclaredExtensions() To return a mutable list which may be used to remove extensions
085         */
086        ExtensionDt addUndeclaredExtension(boolean theIsModifier, String theUrl);
087}