Minimal changes.

Author: dsevilla

ejemplos/backend/grpc/es.um.sisdist.grpc-test1/.settings/org.eclipse.jdt.core.prefs

@@ -1,12 +1,23 @@
 eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.annotation.missingNonNullByDefaultAnnotation=ignore
+org.eclipse.jdt.core.compiler.annotation.nonnull=javax.annotation.Nonnull
+org.eclipse.jdt.core.compiler.annotation.nonnullbydefault=javax.annotation.ParametersAreNonnullByDefault
+org.eclipse.jdt.core.compiler.annotation.nullable=javax.annotation.Nullable
+org.eclipse.jdt.core.compiler.annotation.nullanalysis=enabled
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
 org.eclipse.jdt.core.compiler.compliance=11
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
+org.eclipse.jdt.core.compiler.problem.nullAnnotationInferenceConflict=warning
+org.eclipse.jdt.core.compiler.problem.nullReference=warning
+org.eclipse.jdt.core.compiler.problem.nullSpecViolation=warning
+org.eclipse.jdt.core.compiler.problem.nullUncheckedConversion=ignore
+org.eclipse.jdt.core.compiler.problem.potentialNullReference=warning
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.problem.syntacticNullAnalysisForFields=enabled
 org.eclipse.jdt.core.compiler.processAnnotations=disabled
 org.eclipse.jdt.core.compiler.release=disabled
 org.eclipse.jdt.core.compiler.source=11

ejemplos/backend/rest-jersey/es.um.sisdist.RestTest/.project

@@ -39,4 +39,15 @@
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>org.eclipse.wst.jsdt.core.jsNature</nature>
 	</natures>
+	<filteredResources>
+		<filter>
+			<id>1734083913482</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
 </projectDescription>

proyecto/backend-grpc/es.um.sisdist.backend.grpc.GrpcService/.project

@@ -33,4 +33,15 @@
 		<nature>org.eclipse.m2e.core.maven2Nature</nature>
 		<nature>org.eclipse.wst.common.project.facet.core.nature</nature>
 	</natures>
+	<filteredResources>
+		<filter>
+			<id>1734083913321</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
 </projectDescription>

proyecto/backend-grpc/es.um.sisdist.backend.grpc.GrpcServiceImpl/.project

@@ -20,4 +20,15 @@
 		<nature>org.eclipse.m2e.core.maven2Nature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 	</natures>
+	<filteredResources>
+		<filter>
+			<id>1734083913384</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
 </projectDescription>

proyecto/backend-rest/es.um.sisdist.backend.Service/.project

@@ -39,4 +39,15 @@
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>org.eclipse.wst.jsdt.core.jsNature</nature>
 	</natures>
+	<filteredResources>
+		<filter>
+			<id>1734083913430</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
 </projectDescription>

proyecto/backend-rest/es.um.sisdist.backend.Service/src/es/um/sisdist/backend/Service/CheckLoginEndpoint.java

@@ -1,11 +1,8 @@
 package es.um.sisdist.backend.Service;
 
-import java.util.Optional;
-
 import es.um.sisdist.backend.Service.impl.AppLogicImpl;
 import es.um.sisdist.models.UserDTO;
 import es.um.sisdist.models.UserDTOUtils;
-import es.um.sisdist.backend.dao.models.User;
 import jakarta.ws.rs.Consumes;
 import jakarta.ws.rs.POST;
 import jakarta.ws.rs.Path;
@@ -26,7 +23,7 @@ public class CheckLoginEndpoint
     @Produces(MediaType.APPLICATION_JSON)
     public Response checkUser(UserDTO uo)
     {
-        Optional<User> u = impl.checkLogin(uo.getEmail(), uo.getPassword());
+        var u = impl.checkLogin(uo.getEmail(), uo.getPassword());
         if (u.isPresent())
             return Response.ok(UserDTOUtils.toDTO(u.get())).build();
         else

proyecto/backend/es.um.sisdist.backend.dao/.project

@@ -33,4 +33,15 @@
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>org.eclipse.wst.common.project.facet.core.nature</nature>
 	</natures>
+	<filteredResources>
+		<filter>
+			<id>1734083913456</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
 </projectDescription>