EL calls remove (int i) instead of removing (Object o)
In my JSF page, I am trying to remove an item from a collection. Instead of calling a method Collection.remove(Object o)
, I think the page is calling Vector.remove(int i)
.
Update: tagsCollection is a typeorg.eclipse.persistence.indirection.IndirectList
Update: . This gives the same exception with Vector
With the code below, I am getting the following error:
java.lang.IllegalArgumentException: Unable to convert com.question.entities.Tags [tagId = 12] of type com.question.entities.Tags to int
<ui:repeat value="#{backingBean.question.tagsCollection}" var="tag" >
<li>
<span>#{tag.tagTitle}</span>
<h:commandButton>
<f:ajax event="click" listener="#{backingBean.question.tagsCollection.remove(tag)}" render="@form" execute="@form"/>
</h:commandButton>
</li>
</ui:repeat>
Update: Here is the minimal code that can throw an exception. This throws the following exception:
java.lang.IllegalArgumentException: Cannot convert true from class type java.lang.Boolean to int
index.xhtml
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://xmlns.jcp.org/jsf/html"
xmlns:ui="http://xmlns.jcp.org/jsf/facelets"
xmlns:f="http://xmlns.jcp.org/jsf/core">
<h:head>
<title>Facelet Title</title>
</h:head>
<h:body>
<h:form id="form">
<ui:repeat value="#{backingBean.myList}" var="tag">
#{tag.booleanValue()}
<h:commandButton value="Delete">
<f:ajax listener="#{backingBean.myList.remove(tag)}" execute="@form" render="@form"/>
</h:commandButton>
</ui:repeat>
</h:form>
</h:body>
</html>
BackingBean.java
@Named
@ViewScoped
public class BackingBean implements Serializable {
private Collection<Boolean> myList = new Vector<Boolean>();
public BackingBean() {
myList.add(true);
myList.add(false);
myList.add(true);
}
public Collection<Boolean> getMyList() {
return myList;
}
public void setMyList(Collection<Boolean> myList) {
this.myList = myList;
}
}
source to share
To be honest, I don't know how JSF handles this in the background, but to avoid this, just call your own bean method that does the same
<f:ajax event="click" listener="#{backingBean.removeTag(backingBean.question, tag)}" render="@form" execute="@form"/>
public void removeTag(Question question, Tag tag) {
question.getTagsCollection().remove(tag);
}
source to share