TruncatingConverter.java

package org.jboss.weld.examples.pastecode.jsf;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.FacesConverter;

/**
 * JSF converter responsible for truncating output strings to {@value #TRIMMED_TEXT_LEN} length.
 *
 * @author Pete Muir
 */
@FacesConverter("truncatingConverter")
public class TruncatingConverter implements Converter {

    // The max length of the snippet we show
    private static int TRIMMED_TEXT_LEN = 100;

    public Object getAsObject(FacesContext arg0, UIComponent arg1, String arg2) {
        return arg2;
    }

    public String getAsString(FacesContext arg0, UIComponent arg1, Object arg2) {
        String text = arg2.toString();
        return text.length() < TRIMMED_TEXT_LEN ? text : text.substring(0, TRIMMED_TEXT_LEN) + "\n ...";
    }

}