ca.uhn.fhir.rest.method.SummaryEnumParameter.java Source code

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Here is the source code for ca.uhn.fhir.rest.method.SummaryEnumParameter.java

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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 static org.apache.commons.lang3.StringUtils.isBlank;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.hl7.fhir.instance.model.api.IBaseResource;

import ca.uhn.fhir.context.ConfigurationException;
import ca.uhn.fhir.context.FhirContext;
import ca.uhn.fhir.rest.api.SummaryEnum;
import ca.uhn.fhir.rest.param.CollectionBinder;
import ca.uhn.fhir.rest.server.Constants;
import ca.uhn.fhir.rest.server.exceptions.InternalErrorException;
import ca.uhn.fhir.rest.server.exceptions.InvalidRequestException;

public class SummaryEnumParameter implements IParameter {

    @SuppressWarnings("rawtypes")
    private Class<? extends Collection> myInnerCollectionType;

    @SuppressWarnings("unchecked")
    @Override
    public void translateClientArgumentIntoQueryArgument(FhirContext theContext, Object theSourceClientArgument,
            Map<String, List<String>> theTargetQueryArguments, IBaseResource theTargetResource)
            throws InternalErrorException {
        if (theSourceClientArgument instanceof Collection) {
            List<String> values = new ArrayList<String>();
            for (SummaryEnum next : (Collection<SummaryEnum>) theSourceClientArgument) {
                if (next != null) {
                    values.add(next.getCode());
                }
            }
            theTargetQueryArguments.put(Constants.PARAM_SUMMARY, values);
        } else {
            SummaryEnum ss = (SummaryEnum) theSourceClientArgument;
            if (ss != null) {
                theTargetQueryArguments.put(Constants.PARAM_SUMMARY, Collections.singletonList(ss.getCode()));
            }
        }
    }

    @Override
    @SuppressWarnings({ "rawtypes", "unchecked" })
    public Object translateQueryParametersIntoServerArgument(RequestDetails theRequest,
            BaseMethodBinding<?> theMethodBinding) throws InternalErrorException, InvalidRequestException {
        Set<SummaryEnum> value = getSummaryValueOrNull(theRequest);
        if (value == null || value.isEmpty()) {
            return null;
        }

        if (myInnerCollectionType == null) {
            return value.iterator().next();
        }

        try {
            Collection retVal = myInnerCollectionType.newInstance();
            retVal.addAll(value);
            return retVal;
        } catch (InstantiationException e) {
            throw new InternalErrorException("Failed to instantiate " + myInnerCollectionType, e);
        } catch (IllegalAccessException e) {
            throw new InternalErrorException("Failed to instantiate " + myInnerCollectionType, e);
        }
    }

    public static Set<SummaryEnum> getSummaryValueOrNull(RequestDetails theRequest) {
        String[] summary = theRequest.getParameters().get(Constants.PARAM_SUMMARY);

        Set<SummaryEnum> retVal;
        if (summary == null || summary.length == 0) {
            retVal = null;
        } else if (isBlank(summary[0])) {
            retVal = null;
        } else if (summary.length == 1) {
            retVal = toCollectionOrNull(SummaryEnum.fromCode(summary[0]));
            if (retVal == null) {
                retVal = toCollectionOrNull(SummaryEnum.fromCode(summary[0].toLowerCase()));
            }
        } else {
            retVal = new HashSet<SummaryEnum>();
            for (String next : summary) {
                SummaryEnum value = SummaryEnum.fromCode(next);
                if (value == null) {
                    value = SummaryEnum.fromCode(next.toLowerCase());
                }
                if (value != null) {
                    retVal.add(value);
                }
            }
        }

        if (retVal != null) {
            if (retVal.contains(SummaryEnum.TEXT)) {
                if (retVal.size() > 1) {
                    String msg = theRequest.getServer().getFhirContext().getLocalizer()
                            .getMessage(SummaryEnumParameter.class, "cantCombineText");
                    throw new InvalidRequestException(msg);
                }
            }
        }

        return retVal;
    }

    private static Set<SummaryEnum> toCollectionOrNull(SummaryEnum theFromCode) {
        if (theFromCode == null) {
            return null;
        }
        return Collections.singleton(theFromCode);
    }

    @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 '"
                    + theMethod.getDeclaringClass().getCanonicalName() + "' is of type " + SummaryEnum.class
                    + " but can not be a collection of collections");
        }
        if (theInnerCollectionType != null) {
            myInnerCollectionType = CollectionBinder.getInstantiableCollectionType(theInnerCollectionType,
                    SummaryEnum.class.getSimpleName());
        }
    }

}