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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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 javax.json;

import java.util.Map;

/**
 * A JsonObject, e.g.
 *  * {
 *     "name":"karl",
 *     "age":38,
 *     "address": {
 *         "street":"dummystreet"
 *         "housenumber":12
 *     }
 * }
 * 
 *
 * A JsonObject is always also a Map which uses the attribute names as key mapping
 * to their JsonValues.
 */
public interface JsonObject extends JsonStructure, Map {

    /**
     * @return the JsonArray with the given name or {@code null} if there is no attribute with that name
     * @throws ClassCastException if the JsonValue cannot be correctly cast
     */
    JsonArray getJsonArray(String name);

    /**
     * @return the JsonObject with the given name or {@code null} if there is no attribute with that name
     * @throws ClassCastException if the JsonValue cannot be correctly cast
     */
    JsonObject getJsonObject(String name);

    /**
     * @return the JsonNumber with the given name or {@code null} if there is no attribute with that name
     * @throws ClassCastException if the JsonValue cannot be correctly cast
     */
    JsonNumber getJsonNumber(String name);

    /**
     * @return the JsonString with the given name or {@code null} if there is no attribute with that name
     * @throws ClassCastException if the JsonValue cannot be correctly cast
     */
    JsonString getJsonString(String name);

    /**
     * @return the native string with the given name or {@code null} if there is no attribute with that name
     * @throws ClassCastException if the JsonValue cannot be correctly cast
     */
    String getString(String name);

    /**
     * @return the native string with the given name or the default value if there is no attribute with that name
     * @throws ClassCastException if the JsonValue cannot be correctly cast
     */
    String getString(String name, String defaultValue);

    /**
     * @return the int with the given name or {@code null} if there is no attribute with that name
     * @throws ClassCastException if the JsonValue cannot be correctly cast
     * @throws NullPointerException if an object with the given name doesn't exist
     */
    int getInt(String name);

    /**
     * @return the int with the given name or the default value if there is no attribute with that name
     * @throws ClassCastException if the JsonValue cannot be correctly cast
     */
    int getInt(String name, int defaultValue);

    /**
     * @return the boolean with the given name or {@code null} if there is no attribute with that name
     * @throws ClassCastException if the JsonValue cannot be correctly cast
     * @throws NullPointerException if an object with the given name doesn't exist
     */
    boolean getBoolean(String name);

    /**
     * @return the boolean with the given name or the default value if there is no attribute with that name
     * @throws ClassCastException if the JsonValue cannot be correctly cast
     */
    boolean getBoolean(String name, boolean defaultValue);

    /**
     * @return whether the attribute with the given name is {@link JsonValue#NULL}
     */
    boolean isNull(String name);
}