package org.jboss.seam.ui.renderkit;
import java.io.IOException;
import javax.faces.component.EditableValueHolder;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.validator.Validator;
import org.jboss.seam.ui.component.UIEqualityValidator;
import org.jboss.seam.ui.util.cdk.RendererBase;
import org.jboss.seam.ui.validator.EqualityValidator;
/**
* This class mainly does some validation "hook-in"
*
* @author Daniel Roth
*
*/
public class EqualityValidatorRendererBase extends RendererBase
{
@Override
protected Class getComponentClass()
{
return UIEqualityValidator.class;
}
@Override
protected void doEncodeChildren(ResponseWriter writer, FacesContext context, UIComponent component) throws IOException
{
UIEqualityValidator ev = (UIEqualityValidator) component;
EditableValueHolder evh = null;
if (ev != null && ev.getParent() instanceof EditableValueHolder)
{
evh = (EditableValueHolder) ev.getParent();
}
if (evh == null)
throw new IllegalArgumentException("validateEquality tag must be nested in an EditableValueHolder (\"input tag\")");
if (!hasEqualityValidator(evh))
{
evh.addValidator(new EqualityValidator(ev.getFor(), ev.getMessage(), ev.getMessageId(), ev.getOperator()));
evh.setRequired(true);
}
renderChildren(context, component);
}
private boolean hasEqualityValidator(EditableValueHolder evh)
{
for (Validator validator : evh.getValidators())
{
if (validator instanceof EqualityValidator)
{
return true;
}
}
return false;
}
@Override
public boolean getRendersChildren()
{
return true;
}
}