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Description
A component that loops through a set of values, setting a property for each
value before rendering its wrapped elements. The
ListEdit component is often more useful if the items are inside a
Form
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See Also
Conditional,
Insert,
ListEdit
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Parameters
| Name |
Type |
Direction |
Required |
Default |
Description |
| source |
Iterator,
Collection,
Object[], or
Object
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in |
yes |
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The source of objects to be iterated, which may be a Collection, an
Iterator, an array of Objects, or a even a single Object (which is treated as a
singleton collection).
The source parameter may even be null,
in which case the Foreach's body is never renderred.
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| value |
Object |
out |
no |
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Used to update the current value on each iteration.
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| index |
int |
out |
no |
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Used to store the index of the current value within the stream of
elements provided by the source parameter. The index parameter is
explicitly updated before the value parameter.
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| element |
String |
in |
no |
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If specified, then the component acts like an Any,
emitting an open and close tag before and after each iteration. Most often,
the element is "tr" when the Foreach is part of an HTML table. Any informal
parameters are applied to the tag. If no element is specified, informal
parameters are ignored.
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Body: rendered
Informal parameters: allowed
Reserved parameters: none
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Examples
The Foreach component is used to generate a table from a Customer List.
| ID |
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Name |
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Level |
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| 10276 |
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Ms Sophie L. Jamies |
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Platinum |
| 10539 |
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Mr Albert H. Davies |
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Gold |
| 10552 |
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Mrs Jan S. Flawson |
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Gold |
| 10863 |
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Mr Robert J. Hassel |
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Silver |
<table cellspacing="6">
<tr>
<td>ID</td>
<td> </td>
<td>Name</td>
<td> </td>
<td>Level</td>
</tr>
<tr>
<td colspan="5"><hr></td>
</tr>
<tr jwcid="@Foreach" source="ognl:customerList" value="ognl:customer" element="tr">
<td><span jwcid="@Insert" value="ognl:customer.id"/></td>
<td> </td>
<td><span jwcid="@Insert" value="ognl:customer.fullName"/></td>
<td> </td>
<td><span jwcid="@Insert" value="ognl:customer.memberLevel"/></td>
</tr>
</table>
<property-specification name="customerList" type="java.util.List" persistent="yes"/>
<property-specification name="customer" type="Customer"/>
public abstract class SalesPage extends BasePage {
public abstract List getCustomerList();
public abstract void setCustomerList(List value);
}
public class Customer implements Serializable {
private Integer id;
private String fullName;
private String memberLevel;
public Customer(Integer id, String fullName, String memberLevel) {
this.id = id;
this.fullName = fullName;
this.memberLevel = memberLevel;
}
public Integer getId() { return id; }
public String getFullName() { return fullName; }
public String getMemberLevel() { return memberLevel; }
}
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