Improve generated header guards (#587)

Signed-off-by: Miguel Company <miguelcompany@eprosima.com>

Author: MiguelCompany

src/main/java/com/eprosima/fastdds/idl/grammar/Context.java

@@ -309,6 +309,12 @@ public void addTypeDeclaration(
     {
         super.addTypeDeclaration(typedecl);
 
+        String scope = typedecl.getScope();
+        if (scope != null && !scope.isEmpty())
+        {
+            last_declaration_scope_ = scope;
+        }
+
         boolean is_nested = typedecl.isAnnotatedAsNested();
 
         if (typedecl.getTypeCode().getKind() == Kind.KIND_STRUCT && typedecl.isInScope() && !is_nested)
@@ -626,15 +632,28 @@ public boolean isGenerateTypeObjectSupport()
 
     public String getHeaderGuardName ()
     {
-        if (m_lastStructure != null)
+        String decl_scope = null;
+        if ((m_lastStructure != null) && m_lastStructure.getHasScope())
         {
-            if (m_lastStructure.getHasScope())
-            {
-                return m_lastStructure.getScope().replaceAll("::", "_").toUpperCase() +
-                       "_" + m_fileNameUpper.replaceAll("\\.", "_");
-            }
+            decl_scope = m_lastStructure.getScope().replaceAll("::", "_");
         }
-        return m_fileNameUpper;
+        else if (last_declaration_scope_ != null && !last_declaration_scope_.isEmpty())
+        {
+            decl_scope = last_declaration_scope_.replaceAll("::", "_");
+        }
+
+        String guard_base = getScopeFile().replaceAll("/", "__").replaceAll("\\\\", "__");
+        if (decl_scope != null && !decl_scope.isEmpty())
+        {
+            guard_base = guard_base + "_" + decl_scope;
+        }
+        return getValidGuardName(guard_base);
+    }
+
+    private String getValidGuardName(
+            String value)
+    {
+        return value.toUpperCase().replaceAll("[^A-Z0-9_]", "_");
     }
 
     public String getM_lastStructureTopicDataTypeName()
@@ -778,4 +797,6 @@ else if (name.equals(Annotation.external_str))
     protected boolean there_is_at_least_one_struct = false;
 
     protected boolean there_is_at_least_one_union = false;
+
+    protected String last_declaration_scope_ = null;
 }

src/test/java/com/eprosima/fastdds/FastDDSGenTest.java

@@ -2,7 +2,9 @@
 
 import org.junit.jupiter.api.Test;
 
+import com.eprosima.fastdds.idl.grammar.Context;
 import com.eprosima.idl.generator.manager.TemplateManager;
+import com.eprosima.idl.parser.tree.TypeDeclaration;
 
 import com.eprosima.integration.Command;
 
@@ -101,6 +103,82 @@ public void Context_getRelativeDir_Test()
         }
     }
 
+
+    @Test
+    public void Context_getHeaderGuardName_UsesFilePath_Test()
+    {
+        Context first_ctx = new Context(
+                new TemplateManager(),
+                "idl\\package_one\\common\\status_list.idl",
+                new ArrayList<String>(),
+                false,
+                false,
+                null,
+                false,
+                false,
+                false,
+                false);
+        Context second_ctx = new Context(
+                new TemplateManager(),
+                "idl/package_two/common/status_list.idl",
+                new ArrayList<String>(),
+                false,
+                false,
+                null,
+                false,
+                false,
+                false,
+                false);
+        Context third_ctx = new Context(
+                new TemplateManager(),
+                "idl/package_two/common/status/list.idl",
+                new ArrayList<String>(),
+                false,
+                false,
+                null,
+                false,
+                false,
+                false,
+                false);
+
+        assertEquals(
+                "IDL__PACKAGE_ONE__COMMON__STATUS_LIST_IDL",
+                first_ctx.getHeaderGuardName());
+        assertEquals(
+                "IDL__PACKAGE_TWO__COMMON__STATUS_LIST_IDL",
+                second_ctx.getHeaderGuardName());
+        assertEquals(
+                "IDL__PACKAGE_TWO__COMMON__STATUS__LIST_IDL",
+                third_ctx.getHeaderGuardName());
+    }
+
+    @Test
+    public void Context_getHeaderGuardName_DependsOnDeclarations_Test()
+    {
+        Context ctx = new Context(
+                new TemplateManager(),
+                "dir-one/impl-type.idl",
+                new ArrayList<String>(),
+                false,
+                false,
+                null,
+                false,
+                false,
+                false,
+                false);
+        TypeDeclaration typedecl = new TypeDeclaration(
+                ctx.getScopeFile(),
+                true,
+                "module::scope",
+                "ScopedType",
+                ctx.createAliasTypeCode("module::scope", "ScopedType"),
+                null);
+
+        ctx.addTypeDeclaration(typedecl);
+
+        assertEquals("DIR_ONE__IMPL_TYPE_IDL_MODULE_SCOPE", ctx.getHeaderGuardName());
+    }
+
     @Test
     public void runTests()
     {