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org.zkoss.bind.impl.InitChildrenBindingImpl Maven / Gradle / Ivy
/* InitChildrenBindingImpl
Purpose:
Description:
History:
2012/1/2 Created by Dennis Chen
Copyright (C) 2011 Potix Corporation. All Rights Reserved.
*/
package org.zkoss.bind.impl;
import java.util.List;
import java.util.Map;
import org.zkoss.bind.BindContext;
import org.zkoss.bind.Binder;
import org.zkoss.bind.Converter;
import org.zkoss.bind.sys.BindEvaluatorX;
import org.zkoss.bind.sys.BinderCtrl;
import org.zkoss.bind.sys.ConditionType;
import org.zkoss.bind.sys.InitChildrenBinding;
import org.zkoss.bind.sys.debugger.BindingExecutionInfoCollector;
import org.zkoss.bind.sys.debugger.impl.info.LoadInfo;
import org.zkoss.bind.xel.zel.BindELContext;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.UiException;
import org.zkoss.zul.ListModel;
import org.zkoss.zul.event.ListDataListener;
/**
* Implementation of {@link InitChildrenBinding}.
* @author Dennis
* @since 6.0.0
*/
public class InitChildrenBindingImpl extends ChildrenBindingImpl implements InitChildrenBinding {
private static final long serialVersionUID = 1463169907348730644L;
public InitChildrenBindingImpl(Binder binder, Component comp, String initExpr, Map bindingArgs,
String converterExpr, Map converterArgs) {
super(binder, comp, initExpr, ConditionType.PROMPT, null, bindingArgs, converterExpr, converterArgs);
}
protected boolean ignoreTracker() {
//init only loaded once, so it don't need to add to tracker.
return true;
}
@SuppressWarnings("unchecked")
public void load(BindContext ctx) {
final Component comp = getComponent(); //ctx.getComponent();
final BindEvaluatorX eval = getBinder().getEvaluatorX();
final BindingExecutionInfoCollector collector = ((BinderCtrl) getBinder()).getBindingExecutionInfoCollector();
//get data from property
Object value = eval.getValue(ctx, comp, _accessInfo.getProperty());
//use _converter to convert type if any
final Converter conv = getConverter();
Object old = value;
if (conv != null) {
value = conv.coerceToUi(value, comp, ctx);
if (value == Converter.IGNORED_VALUE) {
if (collector != null) {
collector.addInfo(new LoadInfo(LoadInfo.CHILDREN_INIT, comp, null, getPropertyString(), null, old,
getArgs(), "*Converter.IGNORED_VALUE"));
}
return;
}
}
comp.getChildren().clear();
BindELContext.removeModel(comp);
if (value != null) {
List data = null;
if (value instanceof List) {
data = (List) value;
} else {
throw new UiException(value + " is not a List, is " + value.getClass());
}
BindChildRenderer renderer = new BindChildRenderer();
BindELContext.addModel(comp, data); //ZK-758. @see AbstractRenderer#addItemReference
//ZK-2545 - Children binding support list model
boolean isUsingListModel = old instanceof ListModel;
if (isUsingListModel) {
ListDataListener dataListener = new ChildrenBindingListDataListener(comp, ctx, conv);
((ListModel) old).addListDataListener(dataListener);
comp.setAttribute(BinderCtrl.CHILDREN_BINDING_MODEL, old);
final Object attribute = comp.setAttribute(BinderCtrl.CHILDREN_BINDING_MODEL_LISTENER, dataListener);
if (attribute instanceof ListDataListener) // B80-ZK-2927
((ListModel) old).removeListDataListener((ListDataListener) attribute);
}
int size = data.size();
int i = 0;
for (Object obj : data) {
renderer.render(comp, obj, i++, size, isUsingListModel);
}
}
if (collector != null) {
collector.addInfo(new LoadInfo(LoadInfo.CHILDREN_INIT, comp, null, getPropertyString(), null, value,
getArgs(), null));
}
}
}
