errorrenderdelegate.java

采用tapestry的简单OA系统

package com.ejsun.entapps.presentation;

import org.apache.tapestry.IMarkupWriter;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.form.IFormComponent;
import org.apache.tapestry.valid.IValidator;
import org.apache.tapestry.valid.ValidationDelegate;

/**
 * Implementation of {@link org.apache.tapestry.valid.IValidationDelegate} 
 * which uses the correct CSS class when rendering errors.
 * 
 * @author	Quake Wang (reference from Tapestry Vlib example)
 * @since	2004-3-21
 * @version $Revision: 1.1 $
 * 
 **/

public class ErrorRenderDelegate extends ValidationDelegate {
    public void writeLabelPrefix(IFormComponent component, IMarkupWriter writer, IRequestCycle cycle) {
        if (isInError(component)) {
            writer.begin("span");
            writer.attribute("class", "invalid-field");
        }
    }

    public void writeLabelSuffix(IFormComponent component, IMarkupWriter writer, IRequestCycle cycle) {
        if (isInError(component))
            writer.end();
    }

    public void writeAttributes(
        IMarkupWriter writer,
        IRequestCycle cycle,
        IFormComponent component,
        IValidator validator) {
        if (isInError())
            writer.attribute("class", "error");
    }

    public void writeSuffix(
        IMarkupWriter writer,
        IRequestCycle cycle,
        IFormComponent component,
        IValidator validator) {
        //if (isInError()) getComponentTracking().getErrorRenderer().render(writer, cycle);
    }

}