org.apache.struts2.interceptor.MultiselectInterceptor 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.AbstractInterceptor;
import org.apache.struts2.dispatcher.HttpParameters;
import org.apache.struts2.dispatcher.Parameter;
import java.util.HashMap;
import java.util.Map;
/**
* Just as the CheckboxInterceptor checks that if only the hidden field is present, so too does this interceptor. If
* the "__multiselect_" request parameter is present and its visible counterpart is not, set a new request parameter to an
* empty String.
*/
public class MultiselectInterceptor extends AbstractInterceptor {
private static final long serialVersionUID = 1L;
/**
* Just as the CheckboxInterceptor checks that if only the hidden field is present, so too does this interceptor.
* If the "__multiselect_" request parameter is present and its visible counterpart is not, set a new request parameter
* to an empty String.
*
* @param ai ActionInvocation
* @return the result of the action
* @throws Exception if error
* @see com.opensymphony.xwork2.interceptor.Interceptor#intercept(com.opensymphony.xwork2.ActionInvocation)
*/
public String intercept(ActionInvocation ai) throws Exception {
HttpParameters parameters = ai.getInvocationContext().getParameters();
Map newParams = new HashMap<>();
for (String name : parameters.keySet()) {
if (name.startsWith("__multiselect_")) {
String key = name.substring("__multiselect_".length());
// is this multi-select box submitted?
if (!parameters.contains(key)) {
// if not, let's be sure to default the value to an empty string array
newParams.put(key, new Parameter.Request(key, new String[0]));
}
parameters = parameters.remove(name);
}
}
ai.getInvocationContext().getParameters().appendAll(newParams);
return ai.invoke();
}
}