...
For an example, see the following two classes:
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| borderStyle | solid |
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| title | MyAction.java |
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| borderStyle | solid |
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/**
* @return a Collection of Foo objects
*/
public Collection getFooCollection()
{
return foo;
}
|
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borderStyle | solid |
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| title | Foo.java |
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| borderStyle | solid |
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/**
* @return a unique identifier
*/
public Long getId()
{
return id;
}
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...
Here is the model bean used within the list. The KeyProperty for this bean is the id attribute.
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borderStyle | solid |
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| title | MyBean.java |
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| borderStyle | solid |
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public class MyBean implements Serializable {
private Long id;
private String name;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String toString() {
return "MyBean{" +
"id=" + id +
", name='" + name + '\'' +
'}';
}
}
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The Action has a beanList attribute initialized with an empty ArrayList.
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borderStyle | solid |
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| title | MyBeanAction.java |
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| borderStyle | solid |
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public class MyBeanAction implements Action {
private List beanList = new ArrayList();
private Map beanMap = new HashMap();
public List getBeanList() {
return beanList;
}
public void setBeanList(List beanList) {
this.beanList = beanList;
}
public Map getBeanMap() {
return beanMap;
}
public void setBeanMap(Map beanMap) {
this.beanMap = beanMap;
}
public String execute() throws Exception {
return SUCCESS;
}
}
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These conversion.properties tell the TypeConverter to use MyBean instances as elements of the List.
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borderStyle | solid |
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| title | MyBeanAction-conversion.properties |
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| borderStyle | solid |
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KeyProperty_beanList=id
Element_beanList=MyBean
CreateIfNull_beanList=true
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...
- The List does not have null values added for unavailable id values. This approach avoids the risk of OutOfMemoryErrors!
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borderStyle | solid |
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| title | MyBeanAction.jsp |
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| borderStyle | solid |
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<s:iterator value="beanList" id="bean">
<stextfield name="beanList(%{bean.id}).name" />
</s:iterator>
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...
