package com.onaro.sanscreen.client.view.tabular.columns;

import org.apache.commons.lang3.StringUtils;

import com.onaro.sanscreen.client.view.tabular.value.IntegerTextValue;

/**
 * Presenter implementation that converts String values to {@link IntegerTextValue}s, to provide
 * numeric sorting behavior when the string values are numeric. This class is a Singleton, which
 * can be accessed via the {@link #INSTANCE} static member.
 * 
 * @see IntegerTextValue
 */
public class IntegerTextValuePresenter extends AbstractColumnValuePresenter<String, IntegerTextValue> {
    
    /**
     * Presenter implementation that converts String values to {@link IntegerTextValue}s, to provide
     * numeric sorting behavior when the string values are numeric. 
     * @see IntegerTextValue
     */
    public static final IntegerTextValuePresenter INSTANCE = new IntegerTextValuePresenter();

    private IntegerTextValuePresenter() {
        super(IntegerTextValue.class);
    }
    
    @Override
    public IntegerTextValue getPresentation(String value, String identifier) {
        return StringUtils.isBlank(value)? null : IntegerTextValue.parse(value);
    }

}