Add an isEmpty() method to IBundleProvider

examples/src/main/java/example/PagingPatientProvider.java

@@ -13,6 +13,8 @@ import ca.uhn.fhir.rest.api.server.IBundleProvider;
 import ca.uhn.fhir.rest.param.StringParam;
 import ca.uhn.fhir.rest.server.IResourceProvider;
 
+import javax.annotation.Nonnull;
+
 @SuppressWarnings("null")
 // START SNIPPET: provider
 public class PagingPatientProvider implements IResourceProvider {
@@ -43,7 +45,8 @@ public class PagingPatientProvider implements IResourceProvider {
             return matchingResourceIds.size();
          }
 
-         @Override
+         @Nonnull
+			@Override
          public List<IBaseResource> getResources(int theFromIndex, int theToIndex) {
             int end = Math.max(theToIndex, matchingResourceIds.size() - 1);
             List<Long> idsToReturn = matchingResourceIds.subList(theFromIndex, end);

hapi-fhir-jaxrsserver-base/src/test/java/ca/uhn/fhir/jaxrs/client/GenericJaxRsClientDstu3Test.java

@@ -1765,14 +1765,30 @@ public class GenericJaxRsClientDstu3Test {
 	@Test
 	public void testTransactionWithString() {
 
-		org.hl7.fhir.dstu3.model.Bundle req = new org.hl7.fhir.dstu3.model.Bundle();
+		Bundle req = new Bundle();
+		req.setType(BundleType.TRANSACTION);
+
 		Patient patient = new Patient();
-		patient.addName().setFamily("PAT_FAMILY");
-		req.addEntry().setResource(patient);
+		patient.setId("C01");
+		patient.addName().setFamily("Smith").addGiven("John");
+		req.addEntry()
+			.setFullUrl("Patient/C01")
+			.setResource(patient).getRequest().setMethod(HTTPVerb.PUT).setUrl("Patient/C01");
+
 		Observation observation = new Observation();
-		observation.getCode().setText("OBS_TEXT");
-		req.addEntry().setResource(observation);
-		String reqString = ourCtx.newJsonParser().encodeResourceToString(req);
+		observation.setId("C02");
+		observation.setStatus(Observation.ObservationStatus.FINAL);
+		observation.setEffective(new DateTimeType("2019-02-21T13:35:00-05:00"));
+		observation.getSubject().setReference("Patient/C01");
+		observation.getCode().addCoding().setSystem("http://loinc.org").setCode("3141-9").setDisplay("Body Weight Measured");
+		observation.setValue(new Quantity(null, 190, "http://unitsofmeaure.org", "{lb_av}", "{lb_av}"));
+		req.addEntry()
+			.setFullUrl("Observation/C02")
+			.setResource(observation).getRequest().setMethod(HTTPVerb.PUT).setUrl("Observation/C02");
+		String reqString = ourCtx.newXmlParser().setPrettyPrint(true).encodeResourceToString(req);
+		ourLog.info(reqString);
+		reqString = ourCtx.newJsonParser().setPrettyPrint(true).encodeResourceToString(req);
+		ourLog.info(reqString);
 
 		org.hl7.fhir.dstu3.model.Bundle resp = new org.hl7.fhir.dstu3.model.Bundle();
 		resp.addEntry().getResponse().setLocation("Patient/1/_history/1");

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/search/PersistedJpaBundleProvider.java

@@ -44,6 +44,7 @@ import org.springframework.transaction.TransactionStatus;
 import org.springframework.transaction.support.TransactionCallbackWithoutResult;
 import org.springframework.transaction.support.TransactionTemplate;
 
+import javax.annotation.Nonnull;
 import javax.persistence.EntityManager;
 import javax.persistence.NoResultException;
 import javax.persistence.TypedQuery;
@@ -222,6 +223,7 @@ public class PersistedJpaBundleProvider implements IBundleProvider {
 		return new InstantDt(mySearchEntity.getCreated());
 	}
 
+	@Nonnull
 	@Override
 	public List<IBaseResource> getResources(final int theFromIndex, final int theToIndex) {
 		ensureDependenciesInjected();

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/search/PersistedJpaSearchFirstPageBundleProvider.java

@@ -36,6 +36,7 @@ import org.springframework.transaction.PlatformTransactionManager;
 import org.springframework.transaction.TransactionDefinition;
 import org.springframework.transaction.support.TransactionTemplate;
 
+import javax.annotation.Nonnull;
 import java.util.List;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -56,6 +57,7 @@ public class PersistedJpaSearchFirstPageBundleProvider extends PersistedJpaBundl
 		myTxManager = theTxManager;
 	}
 
+	@Nonnull
 	@Override
 	public List<IBaseResource> getResources(int theFromIndex, int theToIndex) {
 		SearchCoordinatorSvcImpl.verifySearchHasntFailedOrThrowInternalErrorException(mySearch);

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/util/TestUtil.java

@@ -99,6 +99,7 @@ public class TestUtil {
 			if (!isTransient) {
 				boolean hasColumn = nextField.getAnnotation(Column.class) != null;
 				boolean hasJoinColumn = nextField.getAnnotation(JoinColumn.class) != null;
+				boolean hasEmbeddedId = nextField.getAnnotation(EmbeddedId.class) != null;
 				OneToMany oneToMany = nextField.getAnnotation(OneToMany.class);
 				OneToOne oneToOne = nextField.getAnnotation(OneToOne.class);
 				boolean isOtherSideOfOneToManyMapping = oneToMany != null && isNotBlank(oneToMany.mappedBy());
@@ -107,7 +108,8 @@ public class TestUtil {
 					hasColumn ||
 						hasJoinColumn ||
 						isOtherSideOfOneToManyMapping ||
-						isOtherSideOfOneToOneMapping, "Non-transient has no @Column or @JoinColumn: " + nextField);
+						isOtherSideOfOneToOneMapping ||
+						hasEmbeddedId, "Non-transient has no @Column or @JoinColumn or @EmbeddedId: " + nextField);
 			}
 
 

hapi-fhir-jpaserver-base/src/test/java/ca/uhn/fhir/jpa/dao/r4/FhirResourceDaoR4DeleteTest.java

@@ -2,8 +2,14 @@ package ca.uhn.fhir.jpa.dao.r4;
 
 import ca.uhn.fhir.jpa.model.entity.ResourceHistoryTable;
 import ca.uhn.fhir.jpa.model.entity.ResourceTable;
+import ca.uhn.fhir.rest.api.Constants;
 import ca.uhn.fhir.rest.server.exceptions.ResourceGoneException;
+import ca.uhn.fhir.rest.server.exceptions.ResourceVersionConflictException;
 import ca.uhn.fhir.util.TestUtil;
+import com.google.common.base.Charsets;
+import org.apache.commons.io.IOUtils;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpDelete;
 import org.hl7.fhir.instance.model.api.IIdType;
 import org.hl7.fhir.r4.model.*;
 import org.junit.AfterClass;
@@ -11,6 +17,9 @@ import org.junit.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.io.IOException;
+
+import static org.hamcrest.CoreMatchers.containsString;
 import static org.junit.Assert.*;
 
 public class FhirResourceDaoR4DeleteTest extends BaseJpaR4Test {
@@ -60,6 +69,88 @@ public class FhirResourceDaoR4DeleteTest extends BaseJpaR4Test {
 
 	}
 
+
+	@Test
+	public void testDeleteCircularReferenceInTransaction() throws IOException {
+
+		// Create two resources with a circular reference
+		Organization org1 = new Organization();
+		org1.setId(IdType.newRandomUuid());
+		Organization org2 = new Organization();
+		org2.setId(IdType.newRandomUuid());
+		org1.getPartOf().setReference(org2.getId());
+		org2.getPartOf().setReference(org1.getId());
+
+		// Upload them in a transaction
+		Bundle createTransaction = new Bundle();
+		createTransaction.setType(Bundle.BundleType.TRANSACTION);
+		createTransaction
+			.addEntry()
+			.setResource(org1)
+			.setFullUrl(org1.getId())
+			.getRequest()
+			.setMethod(Bundle.HTTPVerb.POST)
+			.setUrl("Organization");
+		createTransaction
+			.addEntry()
+			.setResource(org2)
+			.setFullUrl(org2.getId())
+			.getRequest()
+			.setMethod(Bundle.HTTPVerb.POST)
+			.setUrl("Organization");
+
+		Bundle createResponse = mySystemDao.transaction(mySrd, createTransaction);
+		ourLog.info(myFhirCtx.newJsonParser().setPrettyPrint(true).encodeResourceToString(createResponse));
+
+		IdType orgId1 = new IdType(createResponse.getEntry().get(0).getResponse().getLocation()).toUnqualifiedVersionless();
+		IdType orgId2 = new IdType(createResponse.getEntry().get(1).getResponse().getLocation()).toUnqualifiedVersionless();
+
+		// Nope, can't delete 'em!
+		try {
+			myOrganizationDao.delete(orgId1);
+			fail();
+		} catch (ResourceVersionConflictException e) {
+			// good
+		}
+		try {
+			myOrganizationDao.delete(orgId2);
+			fail();
+		} catch (ResourceVersionConflictException e) {
+			// good
+		}
+
+		// Now in a transaction
+		Bundle deleteTransaction = new Bundle();
+		deleteTransaction.setType(Bundle.BundleType.TRANSACTION);
+		deleteTransaction.addEntry()
+			.getRequest()
+			.setMethod(Bundle.HTTPVerb.DELETE)
+			.setUrl(orgId1.getValue());
+		deleteTransaction.addEntry()
+			.getRequest()
+			.setMethod(Bundle.HTTPVerb.DELETE)
+			.setUrl(orgId2.getValue());
+		ourLog.info(myFhirCtx.newJsonParser().setPrettyPrint(true).encodeResourceToString(deleteTransaction));
+		mySystemDao.transaction(mySrd, deleteTransaction);
+
+		// Make sure they were deleted
+		try {
+			myOrganizationDao.read(orgId1);
+			fail();
+		} catch (ResourceGoneException e) {
+			// good
+		}
+		try {
+			myOrganizationDao.read(orgId2);
+			fail();
+		} catch (ResourceGoneException e) {
+			// good
+		}
+
+
+	}
+
+
 	@Test
 	public void testResourceIsConsideredDeletedIfOnlyResourceTableEntryIsDeleted() {
 

hapi-fhir-server/src/main/java/ca/uhn/fhir/rest/api/server/IBundleProvider.java

@@ -3,6 +3,8 @@ package ca.uhn.fhir.rest.api.server;
 import org.hl7.fhir.instance.model.api.IBaseResource;
 import org.hl7.fhir.instance.model.api.IPrimitiveType;
 
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 import java.util.Date;
 import java.util.List;
 
@@ -97,7 +99,7 @@ public interface IBundleProvider {
 	 * additional 20 resources which matched a client's _include specification.
 	 * <p>
 	 * Note that if this bundle provider was loaded using a
-	 * page ID (i.e. via {@link ca.uhn.fhir.rest.server.IPagingProvider#retrieveResultList(String, String)}
+	 * page ID (i.e. via {@link ca.uhn.fhir.rest.server.IPagingProvider#retrieveResultList(RequestDetails, String, String)}
 	 * because {@link #getNextPageId()} provided a value on the
 	 * previous page, then the indexes should be ignored and the
 	 * whole page returned.
@@ -107,6 +109,7 @@ public interface IBundleProvider {
 	 * @param theToIndex   The high index (exclusive) to return
 	 * @return A list of resources. The size of this list must be at least <code>theToIndex - theFromIndex</code>.
 	 */
+	@Nonnull
 	List<IBaseResource> getResources(int theFromIndex, int theToIndex);
 
 	/**
@@ -126,6 +129,7 @@ public interface IBundleProvider {
 	 * the search, and not to the individual page.
 	 * </p>
 	 */
+	@Nullable
 	String getUuid();
 
 	/**
@@ -144,6 +148,19 @@ public interface IBundleProvider {
 	 * _include's or OperationOutcome). May return {@literal null} if the total size is not
 	 * known or would be too expensive to calculate.
 	 */
+	@Nullable
 	Integer size();
 
+	/**
+	 * This method returns <code>true</code> if the bundle provider knows that at least
+	 * one result exists.
+	 */
+	default boolean isEmpty() {
+		Integer size = size();
+		if (size != null) {
+			return size > 0;
+		}
+		return getResources(0, 1).isEmpty();
+	}
+
 }

hapi-fhir-server/src/main/java/ca/uhn/fhir/rest/server/BundleProviderWithNamedPages.java

@@ -23,6 +23,7 @@ package ca.uhn.fhir.rest.server;
 import org.apache.commons.lang3.Validate;
 import org.hl7.fhir.instance.model.api.IBaseResource;
 
+import javax.annotation.Nonnull;
 import java.util.List;
 
 /**
@@ -84,6 +85,7 @@ public class BundleProviderWithNamedPages extends SimpleBundleProvider {
 		return this;
 	}
 
+	@Nonnull
 	@Override
 	public List<IBaseResource> getResources(int theFromIndex, int theToIndex) {
 		return (List<IBaseResource>) getList(); // indexes are ignored for this provider type

hapi-fhir-server/src/main/java/ca/uhn/fhir/rest/server/BundleProviders.java

@@ -29,6 +29,8 @@ import ca.uhn.fhir.model.primitive.InstantDt;
 import ca.uhn.fhir.rest.api.server.IBundleProvider;
 import ca.uhn.fhir.util.CoverageIgnore;
 
+import javax.annotation.Nonnull;
+
 /**
  * Utility methods for working with {@link IBundleProvider}
  */
@@ -46,6 +48,7 @@ public class BundleProviders {
 	public static IBundleProvider newEmptyList() {
 		final InstantDt published = InstantDt.withCurrentTime();
 		return new IBundleProvider() {
+			@Nonnull
 			@Override
 			public List<IBaseResource> getResources(int theFromIndex, int theToIndex) {
 				return Collections.emptyList();

hapi-fhir-server/src/main/java/ca/uhn/fhir/rest/server/SimpleBundleProvider.java

@@ -25,6 +25,7 @@ import ca.uhn.fhir.rest.api.server.IBundleProvider;
 import org.hl7.fhir.instance.model.api.IBaseResource;
 import org.hl7.fhir.instance.model.api.IPrimitiveType;
 
+import javax.annotation.Nonnull;
 import java.util.Collections;
 import java.util.Date;
 import java.util.List;
@@ -78,6 +79,7 @@ public class SimpleBundleProvider implements IBundleProvider {
 		myPublished = thePublished;
 	}
 
+	@Nonnull
 	@Override
 	public List<IBaseResource> getResources(int theFromIndex, int theToIndex) {
 		return (List<IBaseResource>) myList.subList(theFromIndex, Math.min(theToIndex, myList.size()));

hapi-fhir-server/src/main/java/ca/uhn/fhir/rest/server/method/HistoryMethodBinding.java

@@ -168,6 +168,7 @@ public class HistoryMethodBinding extends BaseResourceReturningMethodBinding {
 				return resources.getPublished();
 			}
 
+			@Nonnull
 			@Override
 			public List<IBaseResource> getResources(int theFromIndex, int theToIndex) {
 				List<IBaseResource> retVal = resources.getResources(theFromIndex, theToIndex);

hapi-fhir-structures-dstu2/src/test/java/ca/uhn/fhir/rest/server/SearchDstu2Test.java

@@ -51,6 +51,8 @@ import static org.junit.Assert.*;
 
 import ca.uhn.fhir.test.utilities.JettyUtil;
 
+import javax.annotation.Nonnull;
+
 public class SearchDstu2Test {
 
 	private static CloseableHttpClient ourClient;
@@ -556,6 +558,7 @@ public class SearchDstu2Test {
 					return ourReturnPublished;
 				}
 
+				@Nonnull
 				@Override
 				public List<IBaseResource> getResources(int theFromIndex, int theToIndex) {
 					throw new IllegalStateException();

hapi-fhir-structures-hl7org-dstu2/src/test/java/ca/uhn/fhir/rest/server/SearchHl7OrgDstu2Test.java

@@ -23,6 +23,7 @@ import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
+import javax.annotation.Nonnull;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 
@@ -120,6 +121,7 @@ public class SearchHl7OrgDstu2Test {
           return ourReturnPublished;
         }
 
+        @Nonnull
         @Override
         public List<IBaseResource> getResources(int theFromIndex, int theToIndex) {
           throw new IllegalStateException();

src/changes/changes.xml

@@ -239,6 +239,11 @@
 				been corrected. Note that at this time, we do not index canonical references
 				at all (as we were previously doing it incorrectly). This will be improved soon.
 			</action>
+			<action type="add">
+				IBundleProvider now has an isEmpty() method that can be used to check whether any
+				results exist. A default implementation has been provided, so this is not
+				a breaking change.
+			</action>
 		</release>
 		<release version="3.8.0" date="2019-05-30" description="Hippo">
 			<action type="fix">