remove commons-lang3 and replace isEmpty checks

Author: ThijsMesman

pom.xml

@@ -54,7 +54,6 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
         <beanmapper.version>6.0.0</beanmapper.version>
-        <commons.lang.version>3.18.0</commons.lang.version>
         <el.api.version>6.0.1</el.api.version>
         <el.impl.version>4.0.2</el.impl.version>
         <guava.version>33.3.1-jre</guava.version>
@@ -94,11 +93,6 @@
             <artifactId>guava</artifactId>
             <version>${guava.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-lang3</artifactId>
-            <version>${commons.lang.version}</version>
-        </dependency>
 
         <!-- Spring integration -->
         <dependency>

src/main/java/io/beanmapper/spring/util/JsonUtil.java

@@ -4,8 +4,6 @@
 import java.util.Iterator;
 import java.util.Set;
 
-import org.apache.commons.lang3.StringUtils;
-
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -17,10 +15,10 @@
  * @since Nov 13, 2015
  */
 public class JsonUtil {
-    
+
     /**
      * Retrieve the property names mentioned in a JSON content.
-     * 
+     *
      * @param json the JSON content
      * @param objectMapper the object mapper
      * @return set of the property names
@@ -33,17 +31,21 @@ public static Set<String> getPropertyNamesFromJson(String json, ObjectMapper obj
             throw new IllegalStateException("Could not retrieve property names from JSON.", e);
         }
     }
-    
+
     private static Set<String> getPropertyNames(JsonNode node, String base) {
         Set<String> propertyNames = new HashSet<>();
         Iterator<String> iterator = node.fieldNames();
         while (iterator.hasNext()) {
             String fieldName = iterator.next();
-            String propertyName = StringUtils.isEmpty(base) ? fieldName : base + "." + fieldName;
+
+            String propertyName = isEmpty(base) ? fieldName : base + "." + fieldName;
             propertyNames.add(propertyName);
             propertyNames.addAll(getPropertyNames(node.get(fieldName), propertyName));
         }
         return propertyNames;
     }
 
-}
+    private static boolean isEmpty(String str) {
+        return str == null || str.isEmpty();
+    }
+}

src/main/java/io/beanmapper/spring/web/MergedFormMethodArgumentResolver.java

@@ -15,7 +15,6 @@
 import io.beanmapper.spring.Lazy;
 import io.beanmapper.spring.web.converter.StructuredBody;
 
-import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.context.ApplicationContext;
@@ -134,7 +133,7 @@ private void validateObject(WebRequestParameters webRequestParameters, Object ob
     }
 
     private Long resolveId(NativeWebRequest webRequest, String mergeId) {
-        if (StringUtils.isEmpty(mergeId)) {
+        if(mergeId == null || mergeId.isEmpty()) {
             return null;
         }