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package org.tela_botanica.client.util;
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import java.util.HashMap;
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import java.util.Iterator;
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import org.tela_botanica.client.RegistreId;
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import org.tela_botanica.client.http.JsonRestRequestBuilder;
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import org.tela_botanica.client.modeles.Configuration;
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import com.extjs.gxt.ui.client.Registry;
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import com.google.gwt.http.client.URL;
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/**
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 * @author Gréguoire DUCHÉ <greguoire@tela-botanica.org>
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 * @author Jean-Pascal MILCENT <jpm@tela-botanica.org>
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 * @description La classe utilDAO fournit des méthodes communes pour les outils DAO
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 * */
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public class UtilDAO {
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	private static String baseUrl = ((Configuration) Registry.get(RegistreId.CONFIG)).getServiceBaseUrl();
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	public static final String GET = "GET";
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	public static final String POST = "POST";
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	public static final String DELETE = "DELETE";
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	public static final String PUT = "PUT";
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	private static final String SEPARATEUR_CHEMIN = "/";
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	private static final String SEPARATEUR_CLE_VALEUR = "=";
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	private static final String SEPARATEUR_PARAMETRE = "&";
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	private static final String SEPARATEUR_CHEMIN_PARAMETRE = "?";
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	private static final String CONTENU_CHEMIN_VIDE = "*";
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	public static JsonRestRequestBuilder construireRequetePost(String nomService)	{
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		return construireRequete(nomService, null, null, POST);
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	}
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	public static JsonRestRequestBuilder construireRequetePost(String nomService, String[] parametres)	{
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		return construireRequete(nomService, parametres, null, POST);
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	}
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	public static JsonRestRequestBuilder construireRequete(String nomService)	{
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		return construireRequete(nomService, null, null, GET);
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	}
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	public static JsonRestRequestBuilder construireRequete(String nomService, String[] parametres)	{
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		return construireRequete(nomService, parametres, null, GET);
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	}
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	public static JsonRestRequestBuilder construireRequete(String nomService, HashMap<String, String> restrictions)	{
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		return construireRequete(nomService, null, restrictions, GET);
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	}
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	public static JsonRestRequestBuilder construireRequete(String nomService, String[] parametres, HashMap<String, String> restrictions)	{
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		return construireRequete(nomService, parametres, restrictions, GET);
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	}
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	private static JsonRestRequestBuilder construireRequete(String nomService, String[] parametres, HashMap<String, String> restrictions, String typeRequete)	{
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		String restrictionsUrl = construireUrlParametres(restrictions);
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		String parametresUrl = construireUrlChemin(parametres);
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		String urlComplete = baseUrl + nomService + parametresUrl + restrictionsUrl;
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		String urlCompleteEncodee = URL.encode(urlComplete);
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		JsonRestRequestBuilder jrrb;
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		if (typeRequete.equals(GET))	{
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			jrrb = new JsonRestRequestBuilder(JsonRestRequestBuilder.GET, urlCompleteEncodee);
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		} else	{
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			jrrb = new JsonRestRequestBuilder(JsonRestRequestBuilder.POST, urlCompleteEncodee);
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		}
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		return jrrb;
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	}
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	private static String construireUrlParametres(HashMap<String, String> parametres) {
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		String parametresUrl = "";
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		if (parametres != null && parametres.size() > 0)	{
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			parametresUrl = SEPARATEUR_CHEMIN_PARAMETRE;
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			Iterator<String> iterateur = parametres.keySet().iterator();
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			while (iterateur.hasNext())	{
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				String cle = iterateur.next();
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				parametresUrl += cle + SEPARATEUR_CLE_VALEUR + parametres.get(cle);
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				if (iterateur.hasNext())	{
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					parametresUrl = parametresUrl + SEPARATEUR_PARAMETRE;
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				}
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			}
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		}
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		return parametresUrl;
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	}
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	private static String construireUrlChemin(String[] morceauxDuChemin) {
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		String cheminUrl = "";
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		if (morceauxDuChemin != null && morceauxDuChemin.length > 0)	{
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			cheminUrl = SEPARATEUR_CHEMIN;
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			for (int i = 0; i < morceauxDuChemin.length; i++)	{
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				cheminUrl += (morceauxDuChemin[i] != null ? morceauxDuChemin[i] : CONTENU_CHEMIN_VIDE) + SEPARATEUR_CHEMIN;
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			}
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		}
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		return cheminUrl;
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	}
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}