org.apache.struts2.interceptor.StrutsConversionErrorInterceptor Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.struts2.interceptor;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor;
import com.opensymphony.xwork2.util.ValueStack;
/**
*
*
* This interceptor extends {@link ConversionErrorInterceptor} but only adds conversion errors from the ActionContext to
* the field errors of the action if the field value is not null, "", or {""} (a size 1 String array with only an empty
* String). See {@link ConversionErrorInterceptor} for more information, as well as the Type Conversion documentation.
*
*
*
* Interceptor parameters:
*
*
*
*
*
* - None
*
*
*
*
*
* Extending the interceptor:
*
*
*
* There are no known extension points for this interceptor.
*
*
*
*
*
* <action name="someAction" class="com.examples.SomeAction">
* <interceptor-ref name="params"/>
* <interceptor-ref name="conversionError"/>
* <result name="success">good_result.ftl</result>
* </action>
*
*
*
* @see com.opensymphony.xwork2.ActionContext#getConversionErrors()
* @see ConversionErrorInterceptor
*/
public class StrutsConversionErrorInterceptor extends ConversionErrorInterceptor {
private static final long serialVersionUID = 2759744840082921602L;
protected Object getOverrideExpr(ActionInvocation invocation, Object value) {
ValueStack stack = invocation.getStack();
try {
stack.push(value);
return escape(stack.findString("top"));
} finally {
stack.pop();
}
}
/**
* Returns false if the value is null, "", or {""} (array of size 1 with a blank element). Returns
* true otherwise.
*
* @param propertyName the name of the property to check.
* @param value the value to error check.
* @return false if the value is null, "", or {""}, true otherwise.
*/
protected boolean shouldAddError(String propertyName, Object value) {
if (value == null) {
return false;
}
if ("".equals(value)) {
return false;
}
if (value instanceof String[]) {
String[] array = (String[]) value;
if (array.length == 0) {
return false;
}
if (array.length > 1) {
return true;
}
String str = array[0];
if ("".equals(str)) {
return false;
}
}
return true;
}
}