net.sourceforge.stripes.util.bean

Class ListPropertyAccessor

java.lang.Object

net.sourceforge.stripes.util.bean.ListPropertyAccessor

All Implemented Interfaces:

PropertyAccessor<java.util.List<?>>

public class ListPropertyAccessor
extends java.lang.Object
implements PropertyAccessor<java.util.List<?>>

Implementation of PropertyAccessor for interacting with Lists. Automatically expands the list to make the supplied list index valid for set operations, and suppresses IndexOutOfBoundsExceptions during get operations.

Since:

Stripes 1.4

Author:

Tim Fennell

Constructor Summary

Constructors

Constructor and Description
ListPropertyAccessor()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	getValue(NodeEvaluation evaluation, java.util.List<?> list) Fetches the value stored at the index specified by the current node.
void	setValue(NodeEvaluation evaluation, java.util.List list, java.lang.Object value) Sets the value at the index specified by the current node to the supplied value.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ListPropertyAccessor

public ListPropertyAccessor()

Method Detail

getValue

public java.lang.Object getValue(NodeEvaluation evaluation,
                        java.util.List<?> list)

Fetches the value stored at the index specified by the current node. If the index is out of bounds, will return null.

Specified by:

getValue in interface PropertyAccessor<java.util.List<?>>

Parameters:

evaluation - the current node evaluation

list - the target list

Returns:

the corresponding item in the list, or null if the list is not long enough

setValue

public void setValue(NodeEvaluation evaluation,
            java.util.List list,
            java.lang.Object value)

Sets the value at the index specified by the current node to the supplied value. If the list is not long enough it is expanded (filling with nulls) until it is large enough to accommodate the supplied index.

Specified by:

setValue in interface PropertyAccessor<java.util.List<?>>

Parameters:

evaluation - the current node evaluation

list - the target list

value - the value to be stored at the specified index