Spring HashMap Form - spring-mvc

Question

I am creating an application with Spring Roo for generate documents. First of all the user create a document:
public class Document {
#NotNull
private String titleDocument;
#OneToMany(cascade = CascadeType.ALL, mappedBy = "relatedDocumentToThisDateField")
private Set<DateField> dateFields = new HashSet<DateField>();
#OneToMany(cascade = CascadeType.ALL, mappedBy = "relatedDocumentToThisRadioButton")
private Set<RadioButtonField> radioButtonFields = new HashSet<RadioButtonField>();
#OneToMany(cascade = CascadeType.ALL, mappedBy = "relatedDocumentToThisStringField")
private Set<StringField> stringFields = new HashSet<StringField>();
}
There are 3 types of fields, for simplify, this is StringField (the others are almost the same):
public class StringField extends Field {
#NotNull
private String valueString;
#NotNull
private Boolean isEditable;
#ManyToOne
private Document relatedDocumentToThisStringField;
#NotNull
private String nameStringField;
}
When the document with fields is created, another user has to fill it. Since I dont know how much fields the document will have I need to create a HashMap Form (I am following this tutorial)
My HashMap is:
public class DynamicForm {
private Map<String, String> dynamicMap=new HashMap<String, String>();
public Map<String, String> getDynamicMap() {
return dynamicMap;
}
public void setDynamicMap(Map<String, String> dynamicMap) {
this.dynamicMap = dynamicMap;
}
}
In my FillDocumentController I have:
#RequestMapping(value = "/{id}", params = "form", produces = "text/html")
public String updateForm(#PathVariable("id") Long id, Model uiModel) {
...
// Create DynamicForm Map
DynamicForm dynamicForm = new DynamicForm();
for (Field field : allFields) {
// Is StringField?
if (field.getClass().equals(StringField.class) == true) {
StringField stringField = (StringField) field;
if( stringField.getIsEditable() == true ) {
dynamicForm.getDynamicMap().put(stringField.getNameStringField(), stringField.getValueString() );
}
}
}
uiModel.addAttribute("dynamicForm", dynamicForm);
return "filldocuments/update";
}
This is the view:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<div
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns:field="urn:jsptagdir:/WEB-INF/tags/form/fields"
xmlns:form="http://www.springframework.org/tags/form"
xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0">
<jsp:directive.page contentType="text/html;charset=UTF-8" />
<jsp:output omit-xml-declaration="yes" />
<form:form action="/DocumentGenerator/filldocuments/add" modelAttribute="dynamicForm" method="post">
<c:forEach items="${dynamicForm.dynamicMap}" var="element">
<input name="element['${element.key}']" value="${element.value}"/>
</c:forEach>
<input type="submit" value="Save" />
</form:form>
</div>
And this is the method that catch the modelAttribute:
#RequestMapping(value="/add", method = RequestMethod.POST, produces = "text/html")
public String update(#ModelAttribute(value="dynamicForm") DynamicForm dynamicForm, BindingResult bindingResult, Model uiModel, HttpServletRequest httpServletRequest) {
for( String key : dynamicForm.getDynamicMap().keySet() ) {
System.out.println("key="+key);
}
return "redirect:/filldocuments";
}
My problem is that dynamicForm is empty. There is another DynamicForm inside of uiModel and is empty too (I was in debug mode). Where is the data that the user fill?? I dont know what is wrong!!

Answer 1

My fault, the view has to be like that:
<c:forEach items="${dynamicForm.dynamicMap}" var="dynamicMap">
<input name="dynamicMap['${dynamicMap.key}']" value="${dynamicMap.value}"/>
</c:forEach>
So the error was use the variable element