public class ConversionErrorInterceptor extends MethodFilterInterceptor
 This interceptor adds any error found in the ActionContext's conversionErrors map as a field error (provided
 that the action implements ValidationAware). In addition, any field that contains a validation error has its
 original value saved such that any subsequent requests for that value return the original value rather than the value
 in the action. This is important because if the value "abc" is submitted and can't be converted to an int, we want to
 display the original string ("abc") again rather than the int value (likely 0, which would make very little sense to
 the user).
 
 Note: Since 2.5.2, this interceptor extends MethodFilterInterceptor, therefore being
 able to deal with excludeMethods / includeMethods parameters. See [Workflow Interceptor]
 (class DefaultWorkflowInterceptor) for documentation and examples on how to use this feature.
 
Interceptor parameters:
Extending the interceptor:
Because this interceptor is not web-specific, it abstracts the logic for whether an error should be added. This allows for web-specific interceptors to use more complex logic in theshouldAddError(java.lang.String, java.lang.Object) method for when a value
 has a conversion error but is null or empty or otherwise indicates that the value was never actually entered by the
 user.
 
 Example code:
 
 <action name="someAction" class="com.examples.SomeAction">
     <interceptor-ref name="params"/>
     <interceptor-ref name="conversionError"/>
     <result name="success">good_result.ftl</result>
 </action>
 
 | Modifier and Type | Field and Description | 
|---|---|
| static String | ORIGINAL_PROPERTY_OVERRIDE | 
excludeMethods, includeMethods| Constructor and Description | 
|---|
| ConversionErrorInterceptor() | 
| Modifier and Type | Method and Description | 
|---|---|
| String | doIntercept(ActionInvocation invocation)Subclasses must override to implement the interceptor logic. | 
| protected String | escape(Object value) | 
| protected Object | getOverrideExpr(ActionInvocation invocation,
               Object value) | 
| protected boolean | shouldAddError(String propertyName,
              Object value) | 
applyInterceptor, getExcludeMethodsSet, getIncludeMethodsSet, intercept, setExcludeMethods, setIncludeMethodsdestroy, init, setDisabled, shouldInterceptpublic static final String ORIGINAL_PROPERTY_OVERRIDE
protected Object getOverrideExpr(ActionInvocation invocation, Object value)
public String doIntercept(ActionInvocation invocation) throws Exception
MethodFilterInterceptordoIntercept in class MethodFilterInterceptorinvocation - the action invocationException - in case of any errorsCopyright © 2000–2025 Apache Software Foundation. All rights reserved.