Document Attribute

pmd-core/src/main/java/net/sourceforge/pmd/lang/ast/xpath/Attribute.java

@@ -14,6 +14,10 @@ import java.util.logging.Logger;
 import net.sourceforge.pmd.lang.ast.Node;
 
 /**
+ * Represents an XPath attribute of a specific node.
+ * Attributes know their name, the node they wrap,
+ * and have access to their value.
+ *
  * @author daniels
  */
 public class Attribute {
@@ -22,20 +26,23 @@ public class Attribute {
     private static final Logger LOG = Logger.getLogger(Attribute.class.getName());
     private static final ConcurrentMap<String, Boolean> DETECTED_DEPRECATED_ATTRIBUTES = new ConcurrentHashMap<>();
 
-
     private static final Object[] EMPTY_OBJ_ARRAY = new Object[0];
+
     private Node parent;
     private String name;
     private Method method;
     private Object value;
     private String stringValue;
 
+    /** Creates a new attribute belonging to the given node using its accessor. */
     public Attribute(Node parent, String name, Method m) {
         this.parent = parent;
         this.name = name;
         this.method = m;
     }
 
+
+    /** Creates a new attribute belonging to the given node using its string value. */
     public Attribute(Node parent, String name, String value) {
         this.parent = parent;
         this.name = name;
@@ -43,6 +50,16 @@ public class Attribute {
         this.stringValue = value;
     }
 
+
+    public String getName() {
+        return name;
+    }
+
+
+    public Node getParent() {
+        return parent;
+    }
+
     public Object getValue() {
         if (value != null) {
             return value;
@@ -71,11 +88,7 @@ public class Attribute {
         if (this.value == null) {
             v = getValue();
         }
-        if (v == null) {
+        stringValue = v == null ? "" : String.valueOf(v);
-            stringValue = "";
-        } else {
-            stringValue = String.valueOf(v);
-        }
         return stringValue;
     }
 
@@ -83,14 +96,6 @@ public class Attribute {
         return parent.getXPathNodeName() + "/@" + name;
     }
 
-    public String getName() {
-        return name;
-    }
-
-    public Node getParent() {
-        return parent;
-    }
-
     @Override
     public String toString() {
         return name + ':' + getValue() + ':' + parent;