001/*
002 * #%L
003 * HAPI FHIR - Core Library
004 * %%
005 * Copyright (C) 2014 - 2023 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.rest.param.binder;
021
022import ca.uhn.fhir.context.ConfigurationException;
023import ca.uhn.fhir.i18n.Msg;
024
025import java.util.ArrayList;
026import java.util.Collection;
027import java.util.HashSet;
028import java.util.List;
029import java.util.Set;
030
031public class CollectionBinder
032// implements IParamBinder
033{
034
035        /**
036         * @param thePositionDescription Just used in exceptions if theCollectionType is invalid
037         */
038        @SuppressWarnings({ "rawtypes", "cast" })
039        public static Class<? extends Collection> getInstantiableCollectionType(Class<? extends Collection<?>> theCollectionType, String thePositionDescription) {
040                if (theCollectionType.equals(List.class) || theCollectionType .equals(ArrayList.class)) {
041                        return (Class<? extends Collection>) ArrayList.class;
042                } else if (theCollectionType .equals( Set.class )|| theCollectionType .equals( HashSet.class)) {
043                        return (Class<? extends Collection>) HashSet.class;
044                } else if (theCollectionType.equals(Collection.class)) {
045                        return (Class<? extends Collection>) ArrayList.class;
046                } else {
047                        throw new ConfigurationException(Msg.code(1956) + "Unsupported binding collection type '" + theCollectionType.getCanonicalName() + "' for " + thePositionDescription);
048                }
049        }
050
051        // private Class<?> myCollectionType;
052        // private IParamBinder myWrap;
053        //
054        // public CollectionBinder(IParamBinder theWrap, Class<? extends java.util.Collection<?>> theCollectionType) {
055        // myWrap = theWrap;
056        // if (theCollectionType == List.class || theCollectionType == ArrayList.class) {
057        // myCollectionType = ArrayList.class;
058        // } else if (theCollectionType == Set.class || theCollectionType == HashSet.class) {
059        // myCollectionType = HashSet.class;
060        // } else if (theCollectionType == Collection.class) {
061        // myCollectionType = ArrayList.class;
062        // } else {
063        // throw new ConfigurationException(Msg.code(1957) + "Unsupported binding collection type: " + theCollectionType.getCanonicalName());
064        // }
065        // }
066
067        // @Override
068        // public String encode(Object theString) throws InternalErrorException {
069        // Collection<?> obj = (Collection<?>) theString;
070        // StringBuilder b = new StringBuilder();
071        // for (Object object : obj) {
072        // String next = myWrap.encode(object);
073        // if (b.length() > 0) {
074        // b.append(",");
075        // }
076        // b.append(next.replace(",", "\\,"));
077        // }
078        // return b.toString();
079        // }
080        //
081        // @SuppressWarnings("unchecked")
082        // @Override
083        // public Object parse(String theString) throws InternalErrorException {
084        // Collection<Object> retVal;
085        // try {
086        // retVal = (Collection<Object>) myCollectionType.newInstance();
087        // } catch (Exception e) {
088        // throw new InternalErrorException(Msg.code(1958) + "Failed to instantiate " + myCollectionType, e);
089        // }
090        //
091        // List<String> params = QueryUtil.splitQueryStringByCommasIgnoreEscape(theString);
092        // for (String string : params) {
093        // Object nextParsed = myWrap.parse(string);
094        // retVal.add(nextParsed);
095        // }
096        //
097        // return retVal;
098        // }
099
100}