Fix for #94

htmlelements-java/src/main/java/ru/yandex/qatools/htmlelements/loader/decorator/HtmlElementDecorator.java

@@ -50,26 +50,29 @@ public HtmlElementDecorator(CustomElementLocatorFactory factory) {
     }
 
     public Object decorate(ClassLoader loader, Field field) {
-        if (isTypifiedElement(field)) {
-            return decorateTypifiedElement(loader, field);
+        try {
+            if (isTypifiedElement(field)) {
+                return decorateTypifiedElement(loader, field);
+            }
+            if (isHtmlElement(field)) {
+                return decorateHtmlElement(loader, field);
+            }
+            if (isWebElement(field) && !field.getName().equals("wrappedElement")) {
+                return decorateWebElement(loader, field);
+            }
+            if (isTypifiedElementList(field)) {
+                return decorateTypifiedElementList(loader, field);
+            }
+            if (isHtmlElementList(field)) {
+                return decorateHtmlElementList(loader, field);
+            }
+            if (isWebElementList(field)) {
+                return decorateWebElementList(loader, field);
+            }
+            return null;
+        } catch (ClassCastException ignore) {
+            return null; // See bug #94 and NonElementFieldsTest
         }
-        if (isHtmlElement(field)) {
-            return decorateHtmlElement(loader, field);
-        }
-        if (isWebElement(field) && !field.getName().equals("wrappedElement")) {
-            return decorateWebElement(loader, field);
-        }
-        if (isTypifiedElementList(field)) {
-            return decorateTypifiedElementList(loader, field);
-        }
-        if (isHtmlElementList(field)) {
-            return decorateHtmlElementList(loader, field);
-        }
-        if (isWebElementList(field)) {
-            return decorateWebElementList(loader, field);
-        }
-
-        return null;
     }
 
     protected <T extends TypifiedElement> T decorateTypifiedElement(ClassLoader loader, Field field) {

htmlelements-java/src/test/java/ru/yandex/qatools/htmlelements/NonElementFieldsTest.java

@@ -0,0 +1,29 @@
+package ru.yandex.qatools.htmlelements;
+
+import org.junit.Test;
+import ru.yandex.qatools.htmlelements.testpages.NonElementFieldsPage;
+
+import static org.hamcrest.CoreMatchers.nullValue;
+import static org.hamcrest.Matchers.emptyCollectionOf;
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertThat;
+
+/**
+ * @author Graham Russell [email protected]
+ *         Date: 24.10.2015
+ */
+public class NonElementFieldsTest {
+
+    @Test
+    public void nonElementPrivateFieldsShouldNotBeDecoratedAsElements() {
+
+        NonElementFieldsPage page = new NonElementFieldsPage();
+
+        assertThat("Non-WebElement/HtmlElement fields are not touched",
+                page.rowsCache, is(nullValue()));
+        assertThat("Non-WebElement/HtmlElement fields are not touched",
+                page.rowsAsStringCache, is(nullValue()));
+        assertThat("Non-WebElement/HtmlElement fields are not touched",
+                page.otherCache, is(emptyCollectionOf(String.class)));
+    }
+}

htmlelements-java/src/test/java/ru/yandex/qatools/htmlelements/testpages/NonElementFieldsPage.java

@@ -0,0 +1,34 @@
+package ru.yandex.qatools.htmlelements.testpages;
+
+import org.openqa.selenium.WebDriver;
+import org.openqa.selenium.WebElement;
+import ru.yandex.qatools.htmlelements.loader.HtmlElementLoader;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.mockito.Mockito.mock;
+
+/**
+ * @author Graham Russell [email protected]
+ *         Date: 24.10.2015
+ */
+public class NonElementFieldsPage {
+
+    // public for ease of assertion in test
+    public List<List<WebElement>> rowsCache;
+    public List<List<String>> rowsAsStringCache;
+    public List<String> otherCache = new ArrayList<>();
+
+    public NonElementFieldsPage() {
+        this(mockDriver());
+    }
+
+    public NonElementFieldsPage(WebDriver driver) {
+        HtmlElementLoader.populatePageObject(this, driver);
+    }
+
+    public static WebDriver mockDriver() {
+        return mock(WebDriver.class);
+    }
+}