com.sun.faces.facelets.tag.jsf.core.PassThroughAttributeHandler Maven / Gradle / Ivy
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package com.sun.faces.facelets.tag.jsf.core;
import com.sun.faces.facelets.tag.TagHandlerImpl;
import java.io.IOException;
import java.util.Map;
import javax.faces.component.UIComponent;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.TagAttribute;
import javax.faces.view.facelets.TagConfig;
import javax.faces.view.facelets.TagException;
/**
* Sets the specified name and attribute on the parent UIComponent. If the
* "value" specified is not a literal, it will instead set the ValueExpression
* on the UIComponent.
*
* See tag
* documentation.
*
* @see javax.faces.component.UIComponent#getAttributes()
* @see javax.faces.component.UIComponent#setValueExpression(java.lang.String,
* javax.el.ValueExpression)
* @author Jacob Hookom
*/
public final class PassThroughAttributeHandler extends TagHandlerImpl
implements javax.faces.view.facelets.AttributeHandler {
private final TagAttribute name;
private final TagAttribute value;
/**
* @param config
*/
public PassThroughAttributeHandler(TagConfig config) {
super(config);
this.name = this.getRequiredAttribute("name");
this.value = this.getRequiredAttribute("value");
}
/*
* (non-Javadoc)
*
* @see com.sun.facelets.FaceletHandler#apply(com.sun.facelets.FaceletContext,
* javax.faces.component.UIComponent)
*/
public void apply(FaceletContext ctx, UIComponent parent)
throws IOException {
if (parent == null) {
throw new TagException(this.tag, "Parent UIComponent was null");
}
// only process if the parent is new to the tree
if (parent.getParent() == null) {
Map passThroughAttrs = parent.getPassThroughAttributes(true);
String attrName;
Object attrValue;
attrName = this.name.getValue(ctx);
attrValue = (this.value.isLiteral()) ? this.value.getValue(ctx) : this.value.getValueExpression(ctx, Object.class);
passThroughAttrs.put(attrName, attrValue);
}
}
// javax.faces.view.facelets.tag.AttributeHandler.getAttributeName()
// implementation.
public String getAttributeName(FaceletContext ctxt) {
return this.name.getValue(ctxt);
}
}