[Developer] #424 show VPD policy function source

src/main/java/com/cloudhandson/vpdbackoffice/domain/vpd/VpdFunctionSource.java

@@ -0,0 +1,13 @@
+package com.cloudhandson.vpdbackoffice.domain.vpd;
+
+public record VpdFunctionSource(
+    String owner,
+    String objectName,
+    String objectType,
+    String source
+) {
+
+  public boolean found() {
+    return source != null && !source.isBlank();
+  }
+}

src/main/java/com/cloudhandson/vpdbackoffice/mapper/VpdPolicyMapper.java

@@ -3,9 +3,16 @@ package com.cloudhandson.vpdbackoffice.mapper;
 import com.cloudhandson.vpdbackoffice.domain.vpd.VpdPolicyView;
 import java.util.List;
 import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
 
 @Mapper
 public interface VpdPolicyMapper {
 
   List<VpdPolicyView> findPolicies();
+
+  String findFunctionSource(
+      @Param("owner") String owner,
+      @Param("objectName") String objectName,
+      @Param("objectType") String objectType
+  );
 }

src/main/java/com/cloudhandson/vpdbackoffice/service/VpdPolicyService.java

@@ -1,8 +1,10 @@
 package com.cloudhandson.vpdbackoffice.service;
 
+import com.cloudhandson.vpdbackoffice.domain.vpd.VpdFunctionSource;
 import com.cloudhandson.vpdbackoffice.domain.vpd.VpdPolicyView;
 import com.cloudhandson.vpdbackoffice.mapper.VpdPolicyMapper;
 import java.util.List;
+import java.util.Locale;
 import org.springframework.stereotype.Service;
 
 @Service
@@ -17,4 +19,33 @@ public class VpdPolicyService {
   public List<VpdPolicyView> findPolicies() {
     return mapper.findPolicies();
   }
+
+  public VpdFunctionSource findFunctionSource(String owner, String packageName, String functionName) {
+    String normalizedOwner = requiredIdentifier(owner, "Function owner");
+    String normalizedFunction = requiredIdentifier(functionName, "Function name");
+    String normalizedPackage = normalizeOptionalIdentifier(packageName);
+    String objectName = normalizedPackage == null ? normalizedFunction : normalizedPackage;
+    String objectType = normalizedPackage == null ? "FUNCTION" : "PACKAGE BODY";
+    String source = mapper.findFunctionSource(normalizedOwner, objectName, objectType);
+    return new VpdFunctionSource(normalizedOwner, objectName, objectType, source);
+  }
+
+  private String requiredIdentifier(String value, String label) {
+    String normalized = normalizeOptionalIdentifier(value);
+    if (normalized == null) {
+      throw new AppException(label + " 값이 없습니다.");
+    }
+    return normalized;
+  }
+
+  private String normalizeOptionalIdentifier(String value) {
+    if (value == null || value.isBlank()) {
+      return null;
+    }
+    String normalized = value.trim().toUpperCase(Locale.ROOT);
+    if (!normalized.matches("[A-Z][A-Z0-9_$#]{0,127}")) {
+      throw new AppException("Oracle identifier 형식이 올바르지 않습니다: " + value);
+    }
+    return normalized;
+  }
 }

src/main/java/com/cloudhandson/vpdbackoffice/web/VpdPolicyController.java

@@ -1,11 +1,13 @@
 package com.cloudhandson.vpdbackoffice.web;
 
+import com.cloudhandson.vpdbackoffice.service.AppException;
 import com.cloudhandson.vpdbackoffice.service.VpdPolicyService;
 import java.util.List;
 import org.springframework.dao.DataAccessException;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 
 @Controller
 public class VpdPolicyController {
@@ -27,4 +29,22 @@ public class VpdPolicyController {
     }
     return "vpd-policies";
   }
+
+  @GetMapping("/vpd-policies/function-source")
+  public String functionSource(
+      @RequestParam String owner,
+      @RequestParam(required = false) String packageName,
+      @RequestParam String functionName,
+      Model model
+  ) {
+    try {
+      model.addAttribute("source", vpdPolicyService.findFunctionSource(owner, packageName, functionName));
+    } catch (AppException exception) {
+      model.addAttribute("errorMessage", exception.getMessage());
+    } catch (DataAccessException exception) {
+      RuntimeErrorMessage message = RuntimeErrorMessages.dataAccess(exception);
+      model.addAttribute("errorMessage", message.message());
+    }
+    return "fragments/vpd-function-source :: source";
+  }
 }