content: /*
   * Copyright (C) 2010 The Android Open Source Project
   *
   * 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.
   */
  
  package im.actor.runtime.json;
  
  class JSON {
      /**
       * Returns the input if it is a JSON-permissible value; throws otherwise.
       */
      static double checkDouble(double d) throws JSONException {
          if (Double.isInfinite(d) || Double.isNaN(d)) {
              throw new JSONException("Forbidden numeric value: " + d);
          }
          return d;
      }
  
      static Boolean toBoolean(Object value) {
          if (value instanceof Boolean) {
              return (Boolean) value;
          } else if (value instanceof String) {
              String stringValue = (String) value;
              if ("true".equalsIgnoreCase(stringValue)) {
                  return true;
              } else if ("false".equalsIgnoreCase(stringValue)) {
                  return false;
              }
          }
          return null;
      }
  
      static Double toDouble(Object value) {
          if (value instanceof Double) {
              return (Double) value;
          } else if (value instanceof Number) {
              return ((Number) value).doubleValue();
          } else if (value instanceof String) {
              try {
                  return Double.valueOf((String) value);
              } catch (NumberFormatException ignored) {
              }
          }
          return null;
      }
  
      static Integer toInteger(Object value) {
          if (value instanceof Integer) {
              return (Integer) value;
          } else if (value instanceof Number) {
              return ((Number) value).intValue();
          } else if (value instanceof String) {
              try {
                  return (int) Double.parseDouble((String) value);
              } catch (NumberFormatException ignored) {
              }
          }
          return null;
      }
  
      static Long toLong(Object value) {
          if (value instanceof Long) {
              return (Long) value;
          } else if (value instanceof Number) {
              return ((Number) value).longValue();
          } else if (value instanceof String) {
              try {
                  return (long) Double.parseDouble((String) value);
              } catch (NumberFormatException ignored) {
              }
          }
          return null;
      }
  
      static String toString(Object value) {
          if (value instanceof String) {
              return (String) value;
          } else if (value != null) {
              return String.valueOf(value);
          }
          return null;
      }
  
      public static JSONException typeMismatch(Object indexOrName, Object actual,
                                               String requiredType) throws JSONException {
          if (actual == null) {
              throw new JSONException("Value at " + indexOrName + " is null.");
          } else {
              throw new JSONException("Value " + actual + " at " + indexOrName
                      + " of type " + actual.getClass().getName()
                      + " cannot be converted to " + requiredType);
          }
      }
  
      public static JSONException typeMismatch(Object actual, String requiredType)
              throws JSONException {
          if (actual == null) {
              throw new JSONException("Value is null.");
          } else {
              throw new JSONException("Value " + actual
                      + " of type " + actual.getClass().getName()
                      + " cannot be converted to " + requiredType);
          }
      }
  }
  