spring-mvc-matrix-variables - manually merging

spring-mvc-java/src/main/java/com/baeldung/web/controller/CompanyController.java

@@ -0,0 +1,56 @@
+package com.baeldung.web.controller;
+
+import com.baeldung.model.Company;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.ModelMap;
+import org.springframework.validation.BindingResult;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.servlet.ModelAndView;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@Controller
+public class CompanyController {
+
+    Map<Long, Company> companyMap = new HashMap<>();
+
+    @RequestMapping(value = "/company", method = RequestMethod.GET)
+    public ModelAndView showForm() {
+        return new ModelAndView("companyHome", "company", new Company());
+    }
+
+    @RequestMapping(value = "/company/{Id}", produces = { "application/json", "application/xml" }, method = RequestMethod.GET)
+    public @ResponseBody Company getCompanyById(@PathVariable final long Id) {
+        return companyMap.get(Id);
+    }
+
+    @RequestMapping(value = "/addCompany", method = RequestMethod.POST)
+    public String submit(@ModelAttribute("company") final Company company, final BindingResult result, final ModelMap model) {
+        if (result.hasErrors()) {
+            return "error";
+        }
+        model.addAttribute("name", company.getName());
+        model.addAttribute("id", company.getId());
+
+        companyMap.put(company.getId(), company);
+
+        return "companyView";
+    }
+
+    @RequestMapping(value = "/companyEmployee/{company}/employeeData/{employee}", method = RequestMethod.GET)
+    @ResponseBody
+    public ResponseEntity<Map<String, String>> getEmployeeDataFromCompany(@MatrixVariable(pathVar = "employee") final Map<String, String> matrixVars) {
+        return new ResponseEntity<>(matrixVars, HttpStatus.OK);
+    }
+
+    @RequestMapping(value = "/companyData/{company}/employeeData/{employee}", method = RequestMethod.GET)
+    @ResponseBody
+    public ResponseEntity<Map<String, String>> getCompanyName(@MatrixVariable(value = "name", pathVar = "company") final String name) {
+        final Map<String, String> result = new HashMap<String, String>();
+        result.put("name", name);
+        return new ResponseEntity<>(result, HttpStatus.OK);
+    }
+}