GetTagsMethodBinding.java example

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hapi-fhir-master
package ca.uhn.fhir.rest.method;

/*
 * #%L
 * HAPI FHIR - Core Library
 * %%
 * Copyright (C) 2014 - 2017 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.
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import java.io.IOException;
import java.io.Reader;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.List;
import java.util.Map;

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.api.IResource;
import ca.uhn.fhir.model.api.TagList;
import ca.uhn.fhir.model.primitive.IdDt;
import ca.uhn.fhir.parser.IParser;
import ca.uhn.fhir.rest.annotation.GetTags;
import ca.uhn.fhir.rest.annotation.IdParam;
import ca.uhn.fhir.rest.api.RequestTypeEnum;
import ca.uhn.fhir.rest.api.RestOperationTypeEnum;
import ca.uhn.fhir.rest.client.BaseHttpClientInvocation;
import ca.uhn.fhir.rest.server.Constants;
import ca.uhn.fhir.rest.server.IResourceProvider;
import ca.uhn.fhir.rest.server.IRestfulServer;
import ca.uhn.fhir.rest.server.exceptions.BaseServerResponseException;
import ca.uhn.fhir.rest.server.exceptions.InternalErrorException;
import ca.uhn.fhir.rest.server.interceptor.IServerInterceptor;

public class GetTagsMethodBinding extends BaseMethodBinding<TagList> {

	private Integer myIdParamIndex;
	private String myResourceName;
	private Class<? extends IBaseResource> myType;
	private Integer myVersionIdParamIndex;

	public GetTagsMethodBinding(Method theMethod, FhirContext theContext, Object theProvider, GetTags theAnnotation) {
		super(theMethod, theContext, theProvider);

		if (theProvider instanceof IResourceProvider) {
			myType = ((IResourceProvider) theProvider).getResourceType();
		} else {
			myType = theAnnotation.type();
		}

		if (!Modifier.isInterface(myType.getModifiers())) {
			myResourceName = theContext.getResourceDefinition(myType).getName();
		}

		myIdParamIndex = MethodUtil.findIdParameterIndex(theMethod, getContext());
		myVersionIdParamIndex = MethodUtil.findVersionIdParameterIndex(theMethod);

		if (myIdParamIndex != null && myType.equals(IResource.class)) {
			throw new ConfigurationException("Method '" + theMethod.getName() + "' does not specify a resource type, but has an @" + IdParam.class.getSimpleName()
					+ " parameter. Please specity a resource type in the @" + GetTags.class.getSimpleName() + " annotation");
		}
	}

	@Override
	public String getResourceName() {
		return myResourceName;
	}

	@Override
	public RestOperationTypeEnum getRestOperationType() {
		return RestOperationTypeEnum.GET_TAGS;
	}

	@Override
	public boolean incomingServerRequestMatchesMethod(RequestDetails theRequest) {
		if (theRequest.getRequestType() != RequestTypeEnum.GET) {
			return false;
		}
		if (!Constants.PARAM_TAGS.equals(theRequest.getOperation())) {
			return false;
		}
		if (myResourceName == null) {
			if (getResourceName() != null) {
				return false;
			}
		} else if (!myResourceName.equals(theRequest.getResourceName())) {
			return false;

		}
		if ((myIdParamIndex != null) != (theRequest.getId() != null)) {
			return false;
		}
		// if ((myVersionIdParamIndex != null) != (theRequest.getVersionId() != null)) {
		// return false;
		// }
		return true;
	}

	@Override
	public BaseHttpClientInvocation invokeClient(Object[] theArgs) throws InternalErrorException {
		HttpGetClientInvocation retVal;

		IdDt id = null;
		IdDt versionId = null;
		if (myIdParamIndex != null) {
			id = (IdDt) theArgs[myIdParamIndex];
			if (myVersionIdParamIndex != null) {
				versionId = (IdDt) theArgs[myVersionIdParamIndex];
			}
		}

		if (myType != IResource.class) {
			if (id != null) {
				if (versionId != null) {
					retVal = new HttpGetClientInvocation(getContext(), getResourceName(), id.getIdPart(), Constants.PARAM_HISTORY, versionId.getValue(), Constants.PARAM_TAGS);
				} else if (id.hasVersionIdPart()) {
					retVal = new HttpGetClientInvocation(getContext(), getResourceName(), id.getIdPart(), Constants.PARAM_HISTORY, id.getVersionIdPart(), Constants.PARAM_TAGS);
				} else {
					retVal = new HttpGetClientInvocation(getContext(), getResourceName(), id.getIdPart(), Constants.PARAM_TAGS);
				}
			} else {
				retVal = new HttpGetClientInvocation(getContext(), getResourceName(), Constants.PARAM_TAGS);
			}
		} else {
			retVal = new HttpGetClientInvocation(getContext(), Constants.PARAM_TAGS);
		}

		if (theArgs != null) {
			for (int idx = 0; idx < theArgs.length; idx++) {
				IParameter nextParam = getParameters().get(idx);
				nextParam.translateClientArgumentIntoQueryArgument(getContext(), theArgs[idx], null, null);
			}
		}

		return retVal;
	}

	@Override
	public TagList invokeClient(String theResponseMimeType, Reader theResponseReader, int theResponseStatusCode, Map<String, List<String>> theHeaders) throws BaseServerResponseException {
		if (theResponseStatusCode == Constants.STATUS_HTTP_200_OK) {
			IParser parser = createAppropriateParserForParsingResponse(theResponseMimeType, theResponseReader, theResponseStatusCode, null);
			TagList retVal = parser.parseTagList(theResponseReader);
			return retVal;
		}
		throw processNon2xxResponseAndReturnExceptionToThrow(theResponseStatusCode, theResponseMimeType, theResponseReader);
	}
	@Override
	public Object invokeServer(IRestfulServer<?> theServer, RequestDetails theRequest) throws BaseServerResponseException, IOException {
		Object[] params = createParametersForServerRequest(theRequest);

		if (myIdParamIndex != null) {
			params[myIdParamIndex] = theRequest.getId();
		}
		if (myVersionIdParamIndex != null) {
			params[myVersionIdParamIndex] = theRequest.getId();
		}

		TagList resp = (TagList) invokeServerMethod(theServer, theRequest, params);

		for (int i = theServer.getInterceptors().size() - 1; i >= 0; i--) {
			IServerInterceptor next = theServer.getInterceptors().get(i);
			boolean continueProcessing = next.outgoingResponse(theRequest, resp);
			if (!continueProcessing) {
				return null;
			}
		}

		return theRequest.getResponse().returnResponse(ParseAction.create(resp), Constants.STATUS_HTTP_200_OK, false, null, null);
	}

}