Added api to find owner.

src/main/java/org/springframework/samples/petclinic/owner/rest/ExistingOwnerForm.java

@@ -0,0 +1,14 @@
+package org.springframework.samples.petclinic.owner.rest;
+
+public class ExistingOwnerForm extends NewOwnerForm{
+	private int id;
+
+	public int getId() {
+		return id;
+	}
+
+	public void setId(int id) {
+		this.id = id;
+	}
+
+}

src/main/java/org/springframework/samples/petclinic/owner/rest/OwnerController.java

@@ -1,13 +1,19 @@
 package org.springframework.samples.petclinic.owner.rest;
 
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Map;
+
 import javax.validation.Valid;
 
 import org.springframework.http.HttpStatus;
+import org.springframework.http.RequestEntity;
 import org.springframework.http.ResponseEntity;
 import org.springframework.samples.petclinic.owner.Owner;
 import org.springframework.samples.petclinic.owner.OwnerRepository;
 import org.springframework.samples.petclinic.visit.VisitRepository;
 import org.springframework.validation.BindingResult;
+import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -38,6 +44,41 @@ public class OwnerController {
 			return new ResponseEntity<Object>("Owner created",HttpStatus.OK);
 		}
 	}
+	
+	@GetMapping("")
+	public ResponseEntity<Object> processFindForm(NewOwnerForm owner) {
+
+		// allow parameterless GET request to return all records
+		if (owner.getLastName() == null) {
+			owner.setLastName(""); // empty string signifies broadest possible search
+		}
+
+		// find owners by last name
+		Collection<ExistingOwnerForm> results = getAllOwners(owner);
+		if (results.isEmpty()) {
+			// no owners found
+			return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+		} else {
+			// owners found
+			return new ResponseEntity<>(results, HttpStatus.OK);
+		}
+	}
+
+	private Collection<ExistingOwnerForm> getAllOwners(NewOwnerForm ownerForm) {
+		Collection<Owner>existingOwners=owners.findByLastName(ownerForm.getLastName());
+		Collection<ExistingOwnerForm>owners=new ArrayList<>();
+		for(Owner existingOwner:existingOwners) {
+			ExistingOwnerForm owner=new ExistingOwnerForm();
+			owner.setId(existingOwner.getId());
+			owner.setAddress(existingOwner.getAddress());
+			owner.setCity(existingOwner.getCity());
+			owner.setFirstName(existingOwner.getFirstName());
+			owner.setLastName(existingOwner.getLastName());
+			owner.setTelephone(existingOwner.getTelephone());
+			owners.add(owner);
+		}
+		return owners;
+	}
 
 	private void createNewOwner(final NewOwnerForm owner) {
 		Owner newOwner=owner.NewOwner();

src/main/java/org/springframework/samples/petclinic/system/SwaggerConfiguration.java

@@ -2,6 +2,7 @@ package org.springframework.samples.petclinic.system;
 
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.web.bind.annotation.RestController;
 
 import springfox.documentation.builders.RequestHandlerSelectors;
 import springfox.documentation.spi.DocumentationType;
@@ -14,7 +15,7 @@ public class SwaggerConfiguration {
 	@Bean
 	public Docket productApi() {
 		return new Docket(DocumentationType.SWAGGER_2).select()
-				.apis(RequestHandlerSelectors.basePackage("org.springframework.samples.petclinic.rest"))
+				.apis(RequestHandlerSelectors.withClassAnnotation(RestController.class))
 				.build();
 	}
 }