/*
    * Licensed to The Apereo Foundation under one or more contributor license
    * agreements. See the NOTICE file distributed with this work for additional
    * information regarding copyright ownership.
    *
    *
    * The Apereo Foundation licenses this file to you under the Educational
    * Community 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://opensource.org/licenses/ecl2.txt
   *
   * 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 org.opencastproject.util;
  
  import static org.opencastproject.util.data.functions.Misc.cast;
  
  import org.opencastproject.util.data.Function;
  
  import java.util.List;
  import java.util.Map;
  
  public final class JsonVal {
    private final Object val;
  
    public JsonVal(Object val) {
      this.val = val;
    }
  
    public <A> A as(Function<Object, ? extends A> converter) {
      return converter.apply(val);
    }
  
    public boolean isObj() {
      return val instanceof Map;
    }
  
    public boolean isArr() {
      return val instanceof List;
    }
  
    public Object get() {
      return val;
    }
  
    public static final Function<Object, String> asString = caster(String.class);
    public static final Function<Object, Integer> asInteger = caster(Integer.class);
    public static final Function<Object, Long> asLong = caster(Long.class);
    public static final Function<Object, Float> asFloat = caster(Float.class);
    public static final Function<Object, Double> asDouble = caster(Double.class);
    public static final Function<Object, Boolean> asBoolean = caster(Boolean.class);
    public static final Function<Object, JsonObj> asJsonObj = new Function<Object, JsonObj>() {
      @Override public JsonObj apply(Object o) {
        return JsonObj.jsonObj((Map) o);
      }
    };
    public static final Function<Object, JsonArr> asJsonArr = new Function<Object, JsonArr>() {
      @Override public JsonArr apply(Object o) {
        return new JsonArr((List) o);
      }
    };
    public static final Function<Object, JsonVal> asJsonVal = new Function<Object, JsonVal>() {
      @Override public JsonVal apply(Object o) {
        return new JsonVal(o);
      }
    };
  
    private static <A> Function<Object, A> caster(final Class<A> ev) {
      return new Function<Object, A>() {
        @Override public A apply(Object o) {
          return cast(o, ev);
        }
      };
    }
  }