Merge pull request #487 from yasserzamani/ww_5125

[WW-5125] use .get(...) instead of [...] for fieldErrors
diff --git a/apps/showcase/src/main/resources/template/ajaxErrorContainers/controlfooter.ftl b/apps/showcase/src/main/resources/template/ajaxErrorContainers/controlfooter.ftl
index 588b400..ccba707 100644
--- a/apps/showcase/src/main/resources/template/ajaxErrorContainers/controlfooter.ftl
+++ b/apps/showcase/src/main/resources/template/ajaxErrorContainers/controlfooter.ftl
@@ -22,12 +22,12 @@
     </td><#lt/>
 </tr>
 <#if (parameters.errorposition!"top") == 'bottom'>
-<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors[parameters.name]??/>
+<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors.get(parameters.name)??/>
 <#if hasFieldErrors>
 <tr errorFor="${parameters.id}">
     <td class="tdErrorMessage" colspan="2"><#rt/>
         <#if hasFieldErrors>
-            <#list fieldErrors[parameters.name] as error>
+            <#list fieldErrors.get(parameters.name) as error>
                 <div class="errorMessage">${error}</div><#t/>
             </#list>
         </#if>
diff --git a/apps/showcase/src/main/resources/template/ajaxErrorContainers/controlheader-core.ftl b/apps/showcase/src/main/resources/template/ajaxErrorContainers/controlheader-core.ftl
index 4ea2e6d..3b6ffb4 100644
--- a/apps/showcase/src/main/resources/template/ajaxErrorContainers/controlheader-core.ftl
+++ b/apps/showcase/src/main/resources/template/ajaxErrorContainers/controlheader-core.ftl
@@ -21,12 +21,12 @@
 <#--
 	Always include elements to show errors. They may be filled later via AJAX.
 -->
-<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors[parameters.name]??/>
+<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors.get(parameters.name)??/>
 <#if (parameters.errorposition!"top") == 'top'>
 <tr errorFor="${parameters.id}">
     <td class="tdErrorMessage" colspan="2" data-error-for-fieldname="${parameters.name}"><#rt/>
         <#if hasFieldErrors>
-            <#list fieldErrors[parameters.name] as error>
+            <#list fieldErrors.get(parameters.name) as error>
                 <div class="errorMessage">${error}</div><#t/>
             </#list>
         </#if>
diff --git a/core/src/main/resources/template/css_xhtml/checkbox.ftl b/core/src/main/resources/template/css_xhtml/checkbox.ftl
index fc2b0c5..8fe7000 100644
--- a/core/src/main/resources/template/css_xhtml/checkbox.ftl
+++ b/core/src/main/resources/template/css_xhtml/checkbox.ftl
@@ -23,12 +23,12 @@
 that for checkboxes we do not want the label field to show up as checkboxes handle their own
 lables
 -->
-<#assign hasFieldErrors = fieldErrors?? && fieldErrors[parameters.name]??/>
+<#assign hasFieldErrors = fieldErrors?? && fieldErrors.get(parameters.name)??/>
 <div <#rt/><#if parameters.id??>id="wwgrp_${parameters.id}"<#rt/></#if> class="wwgrp">
 
 <#if hasFieldErrors>
 <div <#rt/><#if parameters.id??>id="wwerr_${parameters.id}"<#rt/></#if> class="wwerr">
-<#list fieldErrors[parameters.name] as error>
+<#list fieldErrors.get(parameters.name) as error>
     <div<#rt/>
     <#if parameters.id??>
      errorFor="${parameters.id}"<#rt/>
diff --git a/core/src/main/resources/template/css_xhtml/controlfooter.ftl b/core/src/main/resources/template/css_xhtml/controlfooter.ftl
index d90fa7b..492a0db 100644
--- a/core/src/main/resources/template/css_xhtml/controlfooter.ftl
+++ b/core/src/main/resources/template/css_xhtml/controlfooter.ftl
@@ -31,10 +31,10 @@
 </span> <#rt/>
 </#if>
 <#if (parameters.errorposition!"top") == 'bottom'>
-<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors[parameters.name]??/>
+<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors.get(parameters.name)??/>
 <#if hasFieldErrors>
 <div <#rt/><#if parameters.id??>id="wwerr_${parameters.id}"<#rt/></#if> class="wwerr">
-<#list fieldErrors[parameters.name] as error>
+<#list fieldErrors.get(parameters.name) as error>
     <div<#rt/>
     <#if parameters.id??>
      errorFor="${parameters.id}"<#rt/>
diff --git a/core/src/main/resources/template/css_xhtml/controlheader-core.ftl b/core/src/main/resources/template/css_xhtml/controlheader-core.ftl
index d7aacf6..daf7752 100644
--- a/core/src/main/resources/template/css_xhtml/controlheader-core.ftl
+++ b/core/src/main/resources/template/css_xhtml/controlheader-core.ftl
@@ -22,13 +22,13 @@
 	Only show message if errors are available.
 	This will be done if ActionSupport is used.
 -->
-<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors[parameters.name]??/>
+<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors.get(parameters.name)??/>
 <div <#rt/><#if parameters.id??>id="wwgrp_${parameters.id}"<#rt/></#if> class="wwgrp">
 	
 <#if (parameters.errorposition!"top") == 'top'>
 <#if hasFieldErrors>
 <div <#rt/><#if parameters.id??>id="wwerr_${parameters.id}"<#rt/></#if> class="wwerr">
-<#list fieldErrors[parameters.name] as error>
+<#list fieldErrors.get(parameters.name) as error>
     <div<#rt/>
     <#if parameters.id??>
      errorFor="${parameters.id}"<#rt/>
diff --git a/core/src/main/resources/template/simple/css.ftl b/core/src/main/resources/template/simple/css.ftl
index 9980c73..fdd3bb8 100644
--- a/core/src/main/resources/template/simple/css.ftl
+++ b/core/src/main/resources/template/simple/css.ftl
@@ -18,7 +18,7 @@
  * under the License.
  */
 -->
-<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors[parameters.name]??/>
+<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors.get(parameters.name)??/>
 <#if parameters.cssClass?has_content && !(hasFieldErrors && parameters.cssErrorClass??)>
  class="${parameters.cssClass}"<#rt/>
 <#elseif parameters.cssClass?has_content && (hasFieldErrors && parameters.cssErrorClass??)>
diff --git a/core/src/main/resources/template/simple/fielderror.ftl b/core/src/main/resources/template/simple/fielderror.ftl
index 41951a4..dbda26a 100644
--- a/core/src/main/resources/template/simple/fielderror.ftl
+++ b/core/src/main/resources/template/simple/fielderror.ftl
@@ -29,7 +29,7 @@
             <#list eKeys as eKey><#t/>
                 <#if (eKey = fieldErrorFieldName)><#t/>
                     <#assign haveMatchedErrorField=true><#t/>
-                    <#assign eValue = fieldErrors[fieldErrorFieldName]><#t/>
+                    <#assign eValue = fieldErrors.get(fieldErrorFieldName)><#t/>
                     <#if (haveMatchedErrorField && (!doneStartUlTag))><#t/>
                     <ul<#rt/>
                         <#if parameters.id?has_content>
@@ -69,7 +69,7 @@
             </#if>
                 >
             <#list eKeys as eKey><#t/>
-                <#assign eValue = fieldErrors[eKey]><#t/>
+                <#assign eValue = fieldErrors.get(eKey)><#t/>
                 <#list eValue as eEachValue><#t/>
                     <li><span><#if parameters.escape>${eEachValue!}<#else>${eEachValue!?no_esc}</#if></span></li>
                 </#list><#t/>
diff --git a/core/src/main/resources/template/xhtml/checkbox.ftl b/core/src/main/resources/template/xhtml/checkbox.ftl
index edaa518..ceef168 100644
--- a/core/src/main/resources/template/xhtml/checkbox.ftl
+++ b/core/src/main/resources/template/xhtml/checkbox.ftl
@@ -18,9 +18,9 @@
  * under the License.
  */
 -->
-<#assign hasFieldErrors = fieldErrors?? && fieldErrors[parameters.name]??/>
+<#assign hasFieldErrors = fieldErrors?? && fieldErrors.get(parameters.name)??/>
 <#if hasFieldErrors>
-<#list fieldErrors[parameters.name] as error>
+<#list fieldErrors.get(parameters.name) as error>
 <tr<#rt/>
 <#if parameters.id??>
  errorFor="${parameters.id}"<#rt/>
diff --git a/core/src/main/resources/template/xhtml/controlfooter.ftl b/core/src/main/resources/template/xhtml/controlfooter.ftl
index 10cf7f9..65d657a 100644
--- a/core/src/main/resources/template/xhtml/controlfooter.ftl
+++ b/core/src/main/resources/template/xhtml/controlfooter.ftl
@@ -22,9 +22,9 @@
     </td><#lt/>
 </tr>
 <#if (parameters.errorposition!"top") == 'bottom'>
-<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors[parameters.name]??/>
+<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors.get(parameters.name)??/>
 <#if hasFieldErrors>
-<#list fieldErrors[parameters.name] as error>
+<#list fieldErrors.get(parameters.name) as error>
 <tr errorFor="${parameters.id}">
     <td class="tdErrorMessage" colspan="2"><#rt/>
         <span class="errorMessage">${error}</span><#t/>
diff --git a/core/src/main/resources/template/xhtml/controlheader-core.ftl b/core/src/main/resources/template/xhtml/controlheader-core.ftl
index 986ed15..894f3fa 100644
--- a/core/src/main/resources/template/xhtml/controlheader-core.ftl
+++ b/core/src/main/resources/template/xhtml/controlheader-core.ftl
@@ -22,10 +22,10 @@
 	Only show message if errors are available.
 	This will be done if ActionSupport is used.
 -->
-<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors[parameters.name]??/>
+<#assign hasFieldErrors = parameters.name?? && fieldErrors?? && fieldErrors.get(parameters.name)??/>
 <#if (parameters.errorposition!"top") == 'top'>
 <#if hasFieldErrors>
-<#list fieldErrors[parameters.name] as error>
+<#list fieldErrors.get(parameters.name) as error>
 <tr errorFor="${parameters.id}">
     <td class="tdErrorMessage" colspan="2"><#rt/>
         <span class="errorMessage">${error}</span><#t/>
diff --git a/core/src/test/java/org/apache/struts2/views/jsp/ui/TextfieldTest.java b/core/src/test/java/org/apache/struts2/views/jsp/ui/TextfieldTest.java
index 8bbefcb..bd52b8a 100644
--- a/core/src/test/java/org/apache/struts2/views/jsp/ui/TextfieldTest.java
+++ b/core/src/test/java/org/apache/struts2/views/jsp/ui/TextfieldTest.java
@@ -145,7 +145,23 @@
 
         verify(TextFieldTag.class.getResource("Textfield-1.txt"));
     }
-    
+
+    public void testWW5125() throws Exception {
+        TestAction testAction = (TestAction) action;
+
+        for(String fieldName : new String[] {"clone", "size", "clear", "values", "hashCode", "isEmpty", "keySet", "entrySet"}) {
+            testAction.addFieldError(fieldName, fieldName + " error");
+
+            TextFieldTag tag = new TextFieldTag();
+            tag.setPageContext(pageContext);
+            tag.setName(fieldName);
+            tag.doStartTag();
+            tag.doEndTag();
+        }
+
+        verify(TextFieldTag.class.getResource("Textfield-WW-5125.txt"));
+    }
+
     public void testSimple_recursionTest() throws Exception {
         TestAction testAction = (TestAction) action;
         testAction.setFoo("%{1+1}");
diff --git a/core/src/test/resources/org/apache/struts2/views/jsp/ui/Textfield-WW-5125.txt b/core/src/test/resources/org/apache/struts2/views/jsp/ui/Textfield-WW-5125.txt
new file mode 100644
index 0000000..5944419
--- /dev/null
+++ b/core/src/test/resources/org/apache/struts2/views/jsp/ui/Textfield-WW-5125.txt
@@ -0,0 +1,80 @@
+<tr errorFor="clone">
+    <td class="tdErrorMessage" colspan="2"><span class="errorMessage">clone error</span></td>
+</tr>
+<tr>
+    <td class="tdLabel"></td>
+    <td
+            class="tdInput"
+><input type="text" name="clone" value="" id="clone"/></td>
+</tr>
+
+<tr errorFor="size">
+    <td class="tdErrorMessage" colspan="2"><span class="errorMessage">size error</span></td>
+</tr>
+<tr>
+    <td class="tdLabel"></td>
+    <td
+            class="tdInput"
+><input type="text" name="size" value="" id="size"/></td>
+</tr>
+
+<tr errorFor="clear">
+    <td class="tdErrorMessage" colspan="2"><span class="errorMessage">clear error</span></td>
+</tr>
+<tr>
+    <td class="tdLabel"></td>
+    <td
+            class="tdInput"
+><input type="text" name="clear" value="" id="clear"/></td>
+</tr>
+
+<tr errorFor="values">
+    <td class="tdErrorMessage" colspan="2"><span class="errorMessage">values error</span></td>
+</tr>
+<tr>
+    <td class="tdLabel"></td>
+    <td
+            class="tdInput"
+><input type="text" name="values" value="" id="values"/></td>
+</tr>
+
+<tr errorFor="hashCode">
+    <td class="tdErrorMessage" colspan="2"><span class="errorMessage">hashCode error</span></td>
+</tr>
+<tr>
+    <td class="tdLabel"></td>
+    <td
+            class="tdInput"
+><input type="text" name="hashCode" value="" id="hashCode"/></td>
+</tr>
+
+<tr errorFor="isEmpty">
+    <td class="tdErrorMessage" colspan="2"><span class="errorMessage">isEmpty error</span></td>
+</tr>
+<tr>
+    <td class="tdLabel"></td>
+    <td
+            class="tdInput"
+><input type="text" name="isEmpty" value="" id="isEmpty"/></td>
+</tr>
+
+<tr errorFor="keySet">
+    <td class="tdErrorMessage" colspan="2"><span class="errorMessage">keySet error</span></td>
+</tr>
+<tr>
+    <td class="tdLabel"></td>
+    <td
+            class="tdInput"
+><input type="text" name="keySet" value="" id="keySet"/></td>
+</tr>
+
+<tr errorFor="entrySet">
+    <td class="tdErrorMessage" colspan="2"><span class="errorMessage">entrySet error</span></td>
+</tr>
+<tr>
+    <td class="tdLabel"></td>
+    <td
+            class="tdInput"
+><input type="text" name="entrySet" value="" id="entrySet"/></td>
+</tr>
+