!fixup Add support for validation of length facet

- add support for length, also set minLength and maxLength with the value of length, when hasLength is true, and those variables are queried
- ensure length and minLength and maxLength facets are not declared together (Xerces Error, but we have asserts incase Xerces validation is turned off)
- add tests for validation=limited and validation=on
- added hexBinary tests

DAFFODIL-2842

daffodil-test/src/test/resources/org/apache/daffodil/section02/validation_errors/Validation.tdml

@@ -425,6 +425,23 @@
       </xs:simpleType>
     </xs:element>
 
+    <xs:element name="e2_6" dfdl:lengthKind="delimited" dfdl:encoding="iso-8859-1">
+        <xs:simpleType>
+            <xs:restriction base="xs:hexBinary">
+                <xs:minLength value="7"/>
+                <xs:maxLength value="7"/>
+            </xs:restriction>
+        </xs:simpleType>
+    </xs:element>
+
+    <xs:element name="e2_7" dfdl:lengthKind="delimited" dfdl:encoding="iso-8859-1">
+        <xs:simpleType>
+            <xs:restriction base="xs:hexBinary">
+                <xs:length value="7"/>
+            </xs:restriction>
+        </xs:simpleType>
+    </xs:element>
+
       <xs:element name="e3_2" dfdl:lengthKind="delimited">
       <xs:simpleType>
         <xs:restriction base="ex:stMaxLength_2">
@@ -660,7 +677,39 @@
 
 		</tdml:validationErrors>
   </tdml:parserTestCase>
-
+
+    <tdml:parserTestCase name="validation_testFacets_01"
+                         root="e2_6" model="TestFacets"
+                         description="validates hexBinary against min/maxLength facet"
+                         validation="limited">
+
+    <tdml:document>
+        <tdml:documentPart type="byte">deadbeefdafada</tdml:documentPart>
+    </tdml:document>
+
+        <tdml:infoset>
+            <tdml:dfdlInfoset>
+                <ex:e2_6>DEADBEEFDAFADA</ex:e2_6>
+            </tdml:dfdlInfoset>
+        </tdml:infoset>
+
+    </tdml:parserTestCase>
+
+    <tdml:parserTestCase name="validation_testFacets_02"
+                         root="e2_7" model="TestFacets"
+                         description="validates hexBinary against length facet"
+                         validation="limited">
+
+    <tdml:document>
+        <tdml:documentPart type="byte">deadbeefdafada</tdml:documentPart>
+    </tdml:document>
+
+        <tdml:infoset>
+            <tdml:dfdlInfoset>
+                <ex:e2_7>DEADBEEFDAFADA</ex:e2_7>
+            </tdml:dfdlInfoset>
+        </tdml:infoset>
+    </tdml:parserTestCase>
 <!--
     Test name: checkEnumeration_Pass_limited
        Schema: TestFacets
@@ -2032,7 +2081,7 @@
         </xs:element>
     </tdml:defineSchema>
 
-    <tdml:parserTestCase name="validation_testFacets_01"
+    <tdml:parserTestCase name="validation_testFacets2_01"
                          root="e2_5" model="TestFacets2"
                          description="checks that length cannot be used with min/maxLength"
                          validation="limited">
@@ -2051,7 +2100,7 @@
 
     </tdml:parserTestCase>
 
-    <tdml:parserTestCase name="validation_testFacets_02"
+    <tdml:parserTestCase name="validation_testFacets2_02"
                          root="e2_5" model="TestFacets2"
                          description="checks that length cannot be used with min/maxLength"
                          validation="on">

daffodil-test/src/test/scala/org/apache/daffodil/section02/validation_errors/TestValidationErr.scala

@@ -187,6 +187,12 @@ class TestValidationErr {
   @Test def test_validation_testFacets_02(): Unit = {
     runner.runOneTest("validation_testFacets_02")
   }
+  @Test def test_validation_testFacets2_01(): Unit = {
+    runner.runOneTest("validation_testFacets2_01")
+  }
+  @Test def test_validation_testFacets2_02(): Unit = {
+    runner.runOneTest("validation_testFacets2_02")
+  }
 
   @Test def test_floatExclusiveValid(): Unit = { runner.runOneTest("floatExclusiveValid") }
   @Test def test_floatExclusiveInf(): Unit = { runner.runOneTest("floatExclusiveInf") }