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slim3の便利メソッドasXxx()

ひがさんにはControllerクラスには便利な機能(asXxx())があるよと教えてもらったので、Controllerクラスをついでに調べてみました。

slim3のControllerクラスにはrequestスコープから取得すると同時に型変換もできる便利なメソッド群asXxx()があるよというお話。

Boolean deleteFlg = asBoolean("delete_flg");

こんな感じ。

私はデフォルト値をつけて使ってます

    protected Byte asByte(String name, Byte defaultValue) {
        Byte v = asByte(name);
        return v == null ? defaultValue : v;
    }

    protected Byte asByte(String name, String pattern, Byte defaultValue) {
        Byte v = asByte(name, pattern);
        return v == null ? defaultValue : v;
    }

    protected Short asShort(String name, Short defaultValue) {
        Short v = asShort(name);
        return v == null ? defaultValue : v;
    }

    protected Short asShort(String name, String pattern, Short defaultValue) {
        Short v = asShort(name, pattern);
        return v == null ? defaultValue : v;
    }

    protected Integer asInteger(String name, Integer defaultValue) {
        Integer v = asInteger(name);
        return v == null ? defaultValue : v;
    }

    protected Integer asInteger(String name, String pattern,
            Integer defaultValue) {
        Integer v = asInteger(name, pattern);
        return v == null ? defaultValue : v;
    }

    protected Long asLong(String name, Long defaultValue) {
        Long v = asLong(name);
        return v == null ? defaultValue : v;
    }

    protected Long asLong(String name, String pattern, Long defaultValue) {
        Long v = asLong(name, pattern);
        return v == null ? defaultValue : v;
    }

    protected Float asFloat(String name, Float defaultValue) {
        Float v = asFloat(name);
        return v == null ? defaultValue : v;
    }

    protected Float asFloat(String name, String pattern, Float defaultValue) {
        Float v = asFloat(name, pattern);
        return v == null ? defaultValue : v;
    }

    protected Double asDouble(String name, Double defaultValue) {
        Double v = asDouble(name);
        return v == null ? defaultValue : v;
    }

    protected Double asDouble(String name, String pattern, Double defaultValue) {
        Double v = asDouble(name, pattern);
        return v == null ? defaultValue : v;
    }

    protected BigDecimal asBigDecimal(String name, BigDecimal defaultValue) {
        BigDecimal v = asBigDecimal(name);
        return v == null ? defaultValue : v;
    }

    protected BigDecimal asBigDecimal(String name, String pattern,
            BigDecimal defaultValue) {
        BigDecimal v = asBigDecimal(name, pattern);
        return v == null ? defaultValue : v;
    }

    protected String asString(String name, String defaultValue) {
        String v = asString(name);
        return v == null ? defaultValue : v;
    }

    protected Boolean asBoolean(String name, Boolean defaultValue) {
        Boolean v = asBoolean(name);
        return v == null ? defaultValue : v;
    }

    protected Date asDate(String name, String pattern, Date defaultValue) {
        Date v = asDate(name, pattern);
        return v == null ? defaultValue : v;
    }

ほかにはAdminControllerクラス作ったりCronControllerクラス作ったり。DataViewerControllerも

(略)

ほかにはHelperクラス

EL式ではなく全部helperクラスでjspは処理してます。static importがすごく便利。

import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.TimeZone;
import java.util.Map.Entry;
import java.util.logging.Logger;

import javax.servlet.http.HttpServletRequest;

import org.slim3.controller.ControllerConstants;
import org.slim3.controller.validator.Errors;
import org.slim3.jsp.Functions;
import org.slim3.util.BeanMap;
import org.slim3.util.RequestLocator;

import com.google.appengine.api.users.User;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;

public abstract class ActionHelper {

    @SuppressWarnings("unused")
    private static final Logger logger =
        Logger.getLogger(ActionHelper.class.getName());

    public static String h(Object input) {
        return Functions.h(input);
    }

    public static String url(String input) {
        return Functions.url(input);
    }

    public static String errorClass(String name, String styleClass) {
        return Functions.errorClass(name, styleClass);
    }

    public static String text(String name) {
        return Functions.text(name);
    }

    public static String checkbox(String name) {
        return Functions.checkbox(name);
    }

    public static String multibox(String name, String value) {
        return Functions.multibox(name, value);
    }

    public static String radio(String name, String value) {
        return Functions.radio(name, value);
    }

    public static String select(String name, String value) {
        return Functions.select(name, value);
    }

    public static String multiselect(String name, String value) {
        return Functions.multiselect(name, value);
    }

    public static Locale locale() {
        return Functions.locale();
    }

    public static TimeZone timeZone() {
        return Functions.timeZone();
    }

    private static HttpServletRequest getRequest() {
        return RequestLocator.get();
    }

    public static Object get(String attributeKey) {
        return getRequest().getAttribute(attributeKey);
    }

    public static String getAsString(String attributeKey) {
        return (String) get(attributeKey);
    }

    public static Integer getAsInteger(String attributeKey) {
        return (Integer) get(attributeKey);
    }

    @SuppressWarnings("unchecked")
    public static List getAsList(String attributeKey) {
        return (List) get(attributeKey);
    }

    @SuppressWarnings("unchecked")
    public static List<BeanMap> getAsBeanMapList(String attributeKey) {
        return (List<BeanMap>) get(attributeKey);
    }

    public static Errors getErrors() {
        Errors e =
            (Errors) get(ControllerConstants.ERRORS_KEY);
        if (e != null) {
            return e;
        }
        return new Errors();
    }

    public static User getUser() {
        UserService userService = UserServiceFactory.getUserService();
        return userService.getCurrentUser();
    }

    public static boolean isLogined() {
        User user = getUser();
        if (user == null) {
            return false;
        }
        if (user.getEmail().length() == 0) {
            return false;
        }
        return true;
    }

    public static boolean isAdmin() {
        if (!isLogined()) {
            return false;
        }
        return UserServiceFactory.getUserService().isUserAdmin();
    }

    public static String loginUrl(String uri) {
        return UserServiceFactory.getUserService().createLoginURL(uri);
    }

    public static String loginUrl() {
        return loginUrl(getRequest().getRequestURI());
    }

    public static String logoutUrl(String uri) {
        return UserServiceFactory.getUserService().createLogoutURL(uri);
    }

    public static String logoutUrl() {
        return logoutUrl(getRequest().getRequestURI());
    }

    public static String userEmail() {
        return getUser().getEmail();
    }

    public static String userAuthDomain() {
        return getUser().getAuthDomain();
    }
}