Java tutorial
package ca.uhn.fhir.rest.method; /* * #%L * HAPI FHIR - Core Library * %% * Copyright (C) 2014 - 2016 University Health Network * %% * 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. * #L% */ import java.lang.reflect.Method; import java.util.Collection; import java.util.Collections; import java.util.List; import java.util.Map; import org.apache.commons.lang3.StringUtils; import org.hl7.fhir.instance.model.api.IBaseResource; import ca.uhn.fhir.context.ConfigurationException; import ca.uhn.fhir.context.FhirContext; import ca.uhn.fhir.model.primitive.InstantDt; import ca.uhn.fhir.parser.DataFormatException; import ca.uhn.fhir.rest.annotation.Since; import ca.uhn.fhir.rest.param.ParameterUtil; import ca.uhn.fhir.rest.server.Constants; import ca.uhn.fhir.rest.server.exceptions.InternalErrorException; import ca.uhn.fhir.rest.server.exceptions.InvalidRequestException; class SinceParameter implements IParameter { private Class<?> myType; @Override public void translateClientArgumentIntoQueryArgument(FhirContext theContext, Object theSourceClientArgument, Map<String, List<String>> theTargetQueryArguments, IBaseResource theTargetResource) throws InternalErrorException { if (theSourceClientArgument != null) { InstantDt since = ParameterUtil.toInstant(theSourceClientArgument); if (since.isEmpty() == false) { theTargetQueryArguments.put(Constants.PARAM_SINCE, Collections.singletonList(since.getValueAsString())); } } } @Override public Object translateQueryParametersIntoServerArgument(RequestDetails theRequest, BaseMethodBinding<?> theMethodBinding) throws InternalErrorException, InvalidRequestException { String[] sinceParams = theRequest.getParameters().remove(Constants.PARAM_SINCE); if (sinceParams != null) { if (sinceParams.length > 0) { if (StringUtils.isNotBlank(sinceParams[0])) { try { InstantDt since = new InstantDt(sinceParams[0]); return ParameterUtil.fromInstant(myType, since); } catch (DataFormatException e) { throw new InvalidRequestException( "Invalid " + Constants.PARAM_SINCE + " value: " + sinceParams[0]); } } } } return ParameterUtil.fromInstant(myType, null); } @Override public void initializeTypes(Method theMethod, Class<? extends Collection<?>> theOuterCollectionType, Class<? extends Collection<?>> theInnerCollectionType, Class<?> theParameterType) { if (theOuterCollectionType != null) { throw new ConfigurationException("Method '" + theMethod.getName() + "' in type '" + "' is annotated with @" + Since.class.getName() + " but can not be of collection type"); } if (!ParameterUtil.getBindableInstantTypes().contains(theParameterType)) { throw new ConfigurationException("Method '" + theMethod.getName() + "' in type '" + "' is annotated with @" + Since.class.getName() + " but is an invalid type, must be one of: " + ParameterUtil.getBindableInstantTypes()); } myType = theParameterType; } }