/*
* WOCheckboxMatrix.java
* (c) Copyright 2001 Apple Computer, Inc. All rights reserved.
* This a modified version.
* Original license: http://www.opensource.apple.com/apsl/
*/
package com.webobjects.woextensions;
import java.util.Enumeration;
import com.webobjects.appserver.WOComponent;
import com.webobjects.appserver.WOContext;
import com.webobjects.foundation.NSArray;
import com.webobjects.foundation.NSMutableArray;
/**
* <span class="ja">
* 記述サンプル： WORepetition がフォーム・バリューを計算するようにします。
*
* This uses a technique of having the WORepetition compute the form values for us.
* This is a bit strange to have the Repetition having form values.
* It may well be clearer to simply use takeValuesFromRequest... in here and not use this trick.
* The ability to ask an element for its elementID seems logical and useful
* (as we use it for the umbrealla name here). Of course, we could have this on the component just as easily,
* and this may be clearer.
* However, if there is a repetition with a repetition in it, then the component's elementID isn't enough.
* </span>
*
* <span class="en">
* This uses a technique of having the WORepetition compute the form values for us.
* This is a bit strange to have the Repetition having form values.
* It may well be clearer to simply use takeValuesFromRequest... in here and not use this trick.
* The ability to ask an element for its elementID seems logical and useful
* (as we use it for the umbrealla name here). Of course, we could have this on the component just as easily,
* and this may be clearer.
* However, if there is a repetition with a repetition in it, then the component's elementID isn't enough.
* </span>
*/
public class WOCheckboxMatrix extends WOComponent {
/**
* Do I need to update serialVersionUID?
* See section 5.6 <cite>Type Changes Affecting Serialization</cite> on page 51 of the
* <a href="http://java.sun.com/j2se/1.4/pdf/serial-spec.pdf">Java Object Serialization Spec</a>
*/
private static final long serialVersionUID = 1L;
public Object currentItem;
public int index;
public String wrapperElementID;
protected NSArray _selections = null;
public WOCheckboxMatrix(WOContext aContext) {
super(aContext);
}
@Override
public boolean isStateless() {
return true;
}
/**
* <span class="ja">カレント・アイテムをセットし、データを item としてプッシュします。 </span>
*/
public void setCurrentItem(Object anItem) {
currentItem = anItem;
setValueForBinding(currentItem, "item");
}
/**
* <span class="ja">データの選択範囲を取得 </span>
*/
public NSArray selections() {
if (_selections == null) {
_selections = (NSArray)_WOJExtensionsUtil.valueForBindingOrNull("selections",this);
if (_selections == null) {
_selections = NSArray.EmptyArray;
}
}
return _selections;
}
/**
* <span class="ja">データの選択範囲をセット </span>
*/
public void setSelections(NSArray aFormValuesArray) {
// ** This is where we accept the formValues. Kind of weird.
NSMutableArray aSelectionsArray = new NSMutableArray();
if (aFormValuesArray != null) {
Enumeration anIndexEnumerator = aFormValuesArray.objectEnumerator();
NSArray anItemList = (NSArray)_WOJExtensionsUtil.valueForBindingOrNull("list",this);
if (anItemList == null) {
anItemList = NSArray.EmptyArray;
}
int anItemCount = anItemList.count();
while (anIndexEnumerator.hasMoreElements()) {
int i = Integer.parseInt((String)anIndexEnumerator.nextElement());
if (i < anItemCount) {
Object anObject = anItemList.objectAtIndex(i);
aSelectionsArray.addObject(anObject);
} else {
// ** serious problem here. Raise an exception?
}
}
}
setValueForBinding(aSelectionsArray, "selections");
_selections = null;
}
/**
* <span class="ja">カレント・アイテムがチェックされている？ </span>
*/
public String isCurrentItemChecked() {
if ((selections() != null) && selections().containsObject(currentItem)) {
return "checked";
}
return null;
}
protected void _invalidateCaches() {
_selections=null;
currentItem = null;
}
@Override
public void reset() {
_invalidateCaches();
}
public Object nullValue() {
return null;
}
}