Fix evaluationPath and schemaLocation in getSubSchema for number in fragment (#1081)

Author: justin-tay

src/main/java/com/networknt/schema/JsonSchema.java

@@ -369,7 +369,7 @@ public JsonSchema getSubSchema(JsonNodePath fragment) {
             Object segment = fragment.getElement(x);
             JsonNode subSchemaNode = getNode(parentNode, segment);
             if (subSchemaNode != null) {
-                if (segment instanceof Number) {
+                if (segment instanceof Number && parentNode.isArray()) {
                     int index = ((Number) segment).intValue();
                     schemaLocation = schemaLocation.append(index);
                     evaluationPath = evaluationPath.append(index);

src/test/java/com/networknt/schema/oas/OpenApi30Test.java

@@ -28,7 +28,9 @@
 import com.networknt.schema.InputFormat;
 import com.networknt.schema.JsonSchema;
 import com.networknt.schema.JsonSchemaFactory;
+import com.networknt.schema.PathType;
 import com.networknt.schema.SchemaLocation;
+import com.networknt.schema.SchemaValidatorsConfig;
 import com.networknt.schema.SpecVersion.VersionFlag;
 import com.networknt.schema.ValidationMessage;
 
@@ -74,7 +76,10 @@ void jsonPointerWithNumberInFragment() {
         JsonSchemaFactory factory = JsonSchemaFactory.getInstance(VersionFlag.V7, builder -> builder
                 .metaSchema(OpenApi30.getInstance()).defaultMetaSchemaIri(OpenApi30.getInstance().getIri()));
         JsonSchema schema = factory.getSchema(SchemaLocation.of(
-                "classpath:schema/oas/3.0/petstore.yaml#/paths/~1pet/post/responses/200/content/application~1json/schema"));
+                "classpath:schema/oas/3.0/petstore.yaml#/paths/~1pet/post/responses/200/content/application~1json/schema"),
+                SchemaValidatorsConfig.builder().pathType(PathType.JSON_PATH).build());
         assertNotNull(schema);
+        assertEquals("$.paths['/pet'].post.responses['200'].content['application/json'].schema",
+                schema.getEvaluationPath().toString());
     }
 }