com.sun.faces.facelets.tag.composite.AttachedObjectTargetHandler Maven / Gradle / Ivy
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package com.sun.faces.facelets.tag.composite;
import com.sun.faces.application.view.FaceletViewHandlingStrategy;
import com.sun.faces.facelets.tag.TagHandlerImpl;
import javax.el.ValueExpression;
import javax.faces.component.UIComponent;
import javax.faces.view.AttachedObjectTarget;
import javax.faces.view.facelets.*;
import java.beans.BeanDescriptor;
import java.beans.BeanInfo;
import java.io.IOException;
import java.util.List;
public abstract class AttachedObjectTargetHandler extends TagHandlerImpl {
private TagAttribute name = null;
private TagAttribute targets = null;
public AttachedObjectTargetHandler(TagConfig config) {
super(config);
this.name = this.getRequiredAttribute("name");
this.targets = this.getAttribute("targets");
}
abstract AttachedObjectTargetImpl newAttachedObjectTargetImpl();
public void apply(FaceletContext ctx, UIComponent parent)
throws IOException {
assert(ctx.getFacesContext().getAttributes().containsKey(FaceletViewHandlingStrategy.IS_BUILDING_METADATA));
// only process if it's been created
if (null == parent ||
(null == (parent = parent.getParent())) ||
!(ComponentHandler.isNew(parent))) {
return;
}
BeanInfo componentBeanInfo = (BeanInfo)
parent.getAttributes().get(UIComponent.BEANINFO_KEY);
if (null == componentBeanInfo) {
throw new TagException(this.tag, "Error: I have an EditableValueHolder tag, but no enclosing composite component");
}
BeanDescriptor componentDescriptor = componentBeanInfo.getBeanDescriptor();
if (null == componentDescriptor) {
throw new TagException(this.tag, "Error: I have an EditableValueHolder tag, but no enclosing composite component");
}
List targetList = (List)
componentDescriptor.getValue(AttachedObjectTarget.ATTACHED_OBJECT_TARGETS_KEY);
AttachedObjectTargetImpl target = newAttachedObjectTargetImpl();
targetList.add(target);
ValueExpression ve = name.getValueExpression(ctx, String.class);
String strValue = (String) ve.getValue(ctx);
if (null != strValue) {
target.setName(strValue);
}
if (null != targets) {
ve = targets.getValueExpression(ctx, String.class);
target.setTargetsList(ve);
}
this.nextHandler.apply(ctx, parent);
}
}