content: package act.data;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 ActFramework
   * %%
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   * 
   *      http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   * #L%
   */
  
  import act.Act;
  import act.Destroyable;
  import act.conf.AppConfig;
  import act.data.annotation.DateFormatPattern;
  import act.data.annotation.Pattern;
  import act.util.ActContext;
  import org.joda.time.format.DateTimeFormat;
  import org.joda.time.format.DateTimeFormatter;
  import org.osgl.$;
  import org.osgl.mvc.result.BadRequest;
  import org.osgl.util.*;
  
  import java.lang.annotation.Annotation;
  import java.lang.reflect.Type;
  import java.util.List;
  import java.util.Locale;
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.concurrent.ConcurrentMap;
  import javax.enterprise.context.ApplicationScoped;
  
  public abstract class JodaDateTimeCodecBase<T> extends StringValueResolver<T>
          implements ValueObject.Codec<T>, Destroyable {
  
      private ConcurrentMap<Locale, DateTimeFormatter> localizedDateFormats = new ConcurrentHashMap<>();
      private boolean i18n;
      private Locale defLocale;
      protected DateTimeFormatter formatter;
      private AppConfig conf;
      private Class<?> dateTimeType;
      private boolean destroyed;
  
      public JodaDateTimeCodecBase(DateTimeFormatter formatter) {
          exploreDateTimeType();
          conf = Act.appConfig();
          i18n = conf.i18nEnabled();
          defLocale = conf.locale();
          initFormatter(formatter);
      }
  
      public JodaDateTimeCodecBase(String pattern) {
          exploreDateTimeType();
          E.illegalArgumentIf(S.blank(pattern));
          conf = Act.appConfig();
          i18n = conf.i18nEnabled();
          defLocale = conf.locale();
          initFormatter(formatter(pattern, defLocale));
      }
  
      @Override
      public void destroy() {
          if (destroyed) {
              return;
          }
          if (null != localizedDateFormats) {
              localizedDateFormats.clear();
              localizedDateFormats = null;
          }
          defLocale = null;
          formatter = null;
          conf = null;
          dateTimeType = null;
          releaseResources();
          destroyed = true;
      }
  
      @Override
      public boolean isDestroyed() {
          return destroyed;
      }
  
      protected void releaseResources() {}
  
      @Override
      public Class<? extends Annotation> scope() {
          return ApplicationScoped.class;
      }
  
      @Override
      public final T parse(String s) {
          return resolve(s);
      }
  
      @Override
      public final Class<T> targetClass() {
          return targetType();
      }
  
      @Override
      public final T resolve(String value) {
          if (S.blank(value)) {
              return null;
          }
          if ("now".equalsIgnoreCase(value)
                  || "today".equalsIgnoreCase(value)
                  || "现在".equalsIgnoreCase(value)
                  || "今天".equalsIgnoreCase(value)
          ) {
              return now();
          }
          // for #691
          T retVal = tryParse(value);
          if (null == retVal && S.isIntOrLong(value)) {
              long epoc = Long.parseLong(value);
              return (T) $.convert(epoc).to(dateTimeType);
          }
          if (null == retVal) {
              throw new BadRequest("Invalid date time format: " + value);
          }
          return retVal;
      }
  
      private T tryParse(String value) {
          try {
              return parse(formatter(), value);
          } catch (Exception e) {
              return null;
          }
      }
  
      public final String toJSONString(T o) {
          String s = toString(o);
          return S.newSizedBuffer(s.length() + 2).append("\"").append(s).append("\"").toString();
      }
  
      @Override
      public final StringValueResolver<T> amended(AnnotationAware beanSpec) {
          DateFormatPattern dfp = beanSpec.getAnnotation(DateFormatPattern.class);
          if (null != dfp) {
              return create(dfp.value());
          }
          String format;
          DateFormatPattern pattern = beanSpec.getAnnotation(DateFormatPattern.class);
          if (null == pattern) {
              Pattern patternLegacy = beanSpec.getAnnotation(Pattern.class);
              format = null == patternLegacy ? null : patternLegacy.value();
          } else {
              format = pattern.value();
          }
          return null == format ? this : create(format);
      }
  
      protected abstract T parse(DateTimeFormatter formatter, String value);
  
      protected abstract DateTimeFormatter isoFormatter();
  
      protected abstract T now();
  
      private void verify() {
          T now = now();
          String s = toString(now);
          if (!s.equals(toString(parse(s)))) {
              throw new IllegalArgumentException("Invalid pattern");
          }
      }
  
      protected abstract JodaDateTimeCodecBase<T> create(String pattern);
  
      protected final DateTimeFormatter formatter() {
          ActContext ctx = ActContext.Base.currentContext();
          String pattern = null == ctx ? null : ctx.dateFormatPattern();
          if (S.notBlank(pattern)) {
              String sanitizedPattern = sanitize(pattern);
              if (null != sanitizedPattern) {
                  return formatter(sanitizedPattern, ctx.locale(true));
              }
          }
          DateTimeFormatter formatter = defaultFormatter();
          if (!i18n) {
              return formatter;
          }
          if (null == ctx) {
              return formatter;
          }
          Locale locale = ctx.locale();
          if (null == locale) {
              return formatter;
          }
          if (locale.equals(defLocale)) {
              return formatter;
          }
          DateTimeFormatter localizedFormatter = localizedDateFormats.get(locale);
          if (null == localizedFormatter) {
              localizedFormatter = formatter(dateTimePattern(conf, locale), locale);
              localizedDateFormats.putIfAbsent(locale, localizedFormatter);
          }
          return localizedFormatter;
      }
  
      protected abstract String dateTimePattern(AppConfig config, Locale locale);
  
      protected String sanitize(String dateTimePattern) {
          return dateTimePattern;
      }
  
      protected DateTimeFormatter defaultFormatter() {
          return this.formatter;
      }
  
      private void initFormatter(DateTimeFormatter formatter) {
          this.formatter = $.requireNotNull(formatter);
          verify();
      }
  
      private void exploreDateTimeType() {
          List<Type> types = Generics.typeParamImplementations(getClass(), StringValueResolver.class);
          dateTimeType = (Class<?>) types.get(0);
      }
  
      private DateTimeFormatter formatter(String pattern, Locale locale) {
          if (S.blank(pattern)) {
              return defaultFormatter();
          }
          return (isIsoStandard(pattern) ? isoFormatter() : DateTimeFormat.forPattern(pattern)).withLocale(locale);
      }
  
      public static boolean isIsoStandard(String pattern) {
          return null == pattern || pattern.contains("iso") || pattern.contains("ISO") || pattern.contains("8601");
      }
  
  }
  