com.opensymphony.xwork2.interceptor
Class ConversionErrorInterceptor

java.lang.Object
  com.opensymphony.xwork2.interceptor.AbstractInterceptor
      com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor

All Implemented Interfaces:

Interceptor, Serializable

Direct Known Subclasses:

StrutsConversionErrorInterceptor

public class ConversionErrorInterceptor
extends AbstractInterceptor

ConversionErrorInterceptor adds conversion errors from the ActionContext to the Action's field errors.

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).

Interceptor parameters:

• None

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 the shouldAddError(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>
 
 

Author:

Jason Carreira

See Also:

Serialized Form

Field Summary

static String

ORIGINAL_PROPERTY_OVERRIDE

Constructor Summary

ConversionErrorInterceptor()

Method Summary

protected Object	getOverrideExpr(ActionInvocation invocation, Object value)
String	intercept(ActionInvocation invocation) Override to handle interception
protected boolean	shouldAddError(String propertyName, Object value)

Methods inherited from class com.opensymphony.xwork2.interceptor.AbstractInterceptor

destroy, init

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ORIGINAL_PROPERTY_OVERRIDE

public static final String ORIGINAL_PROPERTY_OVERRIDE

See Also:

Constant Field Values

Constructor Detail

ConversionErrorInterceptor

public ConversionErrorInterceptor()

Method Detail

getOverrideExpr

protected Object getOverrideExpr(ActionInvocation invocation,
                                 Object value)

intercept

public String intercept(ActionInvocation invocation)
                 throws Exception

Description copied from class: AbstractInterceptor

Override to handle interception

Specified by:

intercept in interface Interceptor

Specified by:

intercept in class AbstractInterceptor

Parameters:

invocation - the action invocation

Returns:

the return code, either returned from ActionInvocation.invoke(), or from the interceptor itself.

Throws:

Exception - any system-level error, as defined in Action.execute().

shouldAddError

protected boolean shouldAddError(String propertyName,
                                 Object value)