package ca.uhn.fhir.rest.method;
/*
* #%L
* HAPI FHIR Library
* %%
* Copyright (C) 2014 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.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.Validate;
import ca.uhn.fhir.context.ConfigurationException;
import ca.uhn.fhir.context.FhirContext;
import ca.uhn.fhir.model.api.Bundle;
import ca.uhn.fhir.model.api.IResource;
import ca.uhn.fhir.model.dstu.resource.Binary;
import ca.uhn.fhir.model.dstu.valueset.RestfulOperationSystemEnum;
import ca.uhn.fhir.model.dstu.valueset.RestfulOperationTypeEnum;
import ca.uhn.fhir.model.primitive.IdDt;
import ca.uhn.fhir.rest.annotation.Read;
import ca.uhn.fhir.rest.method.SearchMethodBinding.RequestType;
import ca.uhn.fhir.rest.param.IParameter;
import ca.uhn.fhir.rest.param.ParameterUtil;
import ca.uhn.fhir.rest.server.Constants;
import ca.uhn.fhir.rest.server.IBundleProvider;
import ca.uhn.fhir.rest.server.exceptions.BaseServerResponseException;
import ca.uhn.fhir.rest.server.exceptions.InternalErrorException;
import ca.uhn.fhir.rest.server.exceptions.InvalidRequestException;
public class ReadMethodBinding extends BaseResourceReturningMethodBinding implements IClientResponseHandlerHandlesBinary<Object> {
private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(ReadMethodBinding.class);
private Integer myIdIndex;
private Integer myVersionIdIndex;
private boolean mySupportsVersion;
public ReadMethodBinding(Class<? extends IResource> theAnnotatedResourceType, Method theMethod, FhirContext theContext, Object theProvider) {
super(theAnnotatedResourceType, theMethod, theContext, theProvider);
Validate.notNull(theMethod, "Method must not be null");
Integer idIndex = ParameterUtil.findIdParameterIndex(theMethod);
Integer versionIdIndex = ParameterUtil.findVersionIdParameterIndex(theMethod);
mySupportsVersion = theMethod.getAnnotation(Read.class).version();
myIdIndex = idIndex;
myVersionIdIndex = versionIdIndex;
Class<?>[] parameterTypes = theMethod.getParameterTypes();
if (!IdDt.class.equals(parameterTypes[myIdIndex])) {
throw new ConfigurationException("ID parameter must be of type: " + IdDt.class.getCanonicalName() + " - Found: " + parameterTypes[myIdIndex]);
}
if (myVersionIdIndex != null && !IdDt.class.equals(parameterTypes[myVersionIdIndex])) {
throw new ConfigurationException("Version ID parameter must be of type: " + IdDt.class.getCanonicalName() + " - Found: " + parameterTypes[myVersionIdIndex]);
}
}
public boolean isVread() {
return mySupportsVersion || myVersionIdIndex != null;
}
@Override
public boolean incomingServerRequestMatchesMethod(Request theRequest) {
if (!theRequest.getResourceName().equals(getResourceName())) {
return false;
}
for (String next : theRequest.getParameters().keySet()) {
if (!ALLOWED_PARAMS.contains(next)) {
return false;
}
}
if (mySupportsVersion == false) {
if ((theRequest.getVersionId() == null) != (myVersionIdIndex == null)) {
return false;
}
}
if (theRequest.getId() == null) {
return false;
}
if (theRequest.getRequestType() != RequestType.GET) {
ourLog.trace("Method {} doesn't match because request type is not GET: {}", theRequest.getId(), theRequest.getRequestType());
return false;
}
if (Constants.PARAM_HISTORY.equals(theRequest.getOperation())) {
if (mySupportsVersion == false && myVersionIdIndex == null) {
return false;
}
} else if (!StringUtils.isBlank(theRequest.getOperation())) {
return false;
}
return true;
}
@Override
public ReturnTypeEnum getReturnType() {
return ReturnTypeEnum.RESOURCE;
}
@Override
public IBundleProvider invokeServer(Request theRequest, Object[] theMethodParams) throws InvalidRequestException, InternalErrorException {
theMethodParams[myIdIndex] = theRequest.getId();
if (myVersionIdIndex != null) {
theMethodParams[myVersionIdIndex] = new IdDt(theRequest.getVersionId().getVersionIdPart());
}
Object response = invokeServerMethod(theMethodParams);
return toResourceList(response);
}
@Override
public HttpGetClientInvocation invokeClient(Object[] theArgs) {
HttpGetClientInvocation retVal;
IdDt id = ((IdDt) theArgs[myIdIndex]);
if (myVersionIdIndex == null) {
String resourceName = getResourceName();
retVal = createReadInvocation(id, resourceName);
} else {
IdDt vid = ((IdDt) theArgs[myVersionIdIndex]);
String resourceName = getResourceName();
retVal = createVReadInvocation(id, vid, resourceName);
}
for (int idx = 0; idx < theArgs.length; idx++) {
IParameter nextParam = getParameters().get(idx);
nextParam.translateClientArgumentIntoQueryArgument(getContext(), theArgs[idx], null, retVal);
}
return retVal;
}
public static HttpGetClientInvocation createVReadInvocation(IdDt theId, IdDt vid, String resourceName) {
return new HttpGetClientInvocation(resourceName, theId.getIdPart(), Constants.URL_TOKEN_HISTORY, vid.getIdPart());
}
public static HttpGetClientInvocation createReadInvocation(IdDt theId, String resourceName) {
if (theId.hasVersionIdPart()) {
return new HttpGetClientInvocation(resourceName, theId.getIdPart(), Constants.URL_TOKEN_HISTORY, theId.getVersionIdPart());
} else {
return new HttpGetClientInvocation(resourceName, theId.getIdPart());
}
}
@Override
public RestfulOperationTypeEnum getResourceOperationType() {
return isVread() ? RestfulOperationTypeEnum.VREAD : RestfulOperationTypeEnum.READ;
}
@Override
public RestfulOperationSystemEnum getSystemOperationType() {
return null;
}
@Override
public boolean isBinary() {
return "Binary".equals(getResourceName());
}
@Override
public Object invokeClient(String theResponseMimeType, InputStream theResponseReader, int theResponseStatusCode, Map<String, List<String>> theHeaders) throws IOException, BaseServerResponseException {
byte[] contents = IOUtils.toByteArray(theResponseReader);
Binary resource = new Binary(theResponseMimeType, contents);
switch (getMethodReturnType()) {
case BUNDLE:
return Bundle.withSingleResource(resource);
case LIST_OF_RESOURCES:
return Collections.singletonList(resource);
case RESOURCE:
return resource;
}
throw new IllegalStateException("" + getMethodReturnType()); // should not happen
}
}