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package net.minidev.json.writer;

/*
 *    Copyright 2011 JSON-SMART authors
 *
 * 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.
 */
import java.io.IOException;
import java.lang.reflect.Type;

import net.minidev.json.parser.ParseException;

/**
 * Default datatype mapper use by Json-smart ton store data.
 * 
 * @author uriel Chemouni
 *
 * @param  result type
 */
public abstract class JsonReaderI {
	public final JsonReader base;

	/**
	 * Reader can be link to the JsonReader Base
	 * 
	 * @param base parent reader
	 */
	public JsonReaderI(JsonReader base) {
		this.base = base;
	}

	private static String ERR_MSG = "Invalid or non Implemented status";

	/**
	 * called when json-smart parser meet an object key
	 * @param key key name
	 */
	public JsonReaderI startObject(String key) throws ParseException, IOException {
		throw new RuntimeException(ERR_MSG + " startObject(String key) in " + this.getClass() + " key=" + key);
	}

	/**
	 * called when json-smart parser start an array.
	 * 
	 * @param key the destination key name, or null.
	 */
	public JsonReaderI startArray(String key) throws ParseException, IOException {
		throw new RuntimeException(ERR_MSG + " startArray in " + this.getClass() + " key=" + key);
	}

	/**
	 * called when json-smart done parsing a value
	 */
	public void setValue(Object current, String key, Object value) throws ParseException, IOException {
		throw new RuntimeException(ERR_MSG + " setValue in " + this.getClass() + " key=" + key);
	}

	/**
	 * -------------
	 */
	public Object getValue(Object current, String key) {
		throw new RuntimeException(ERR_MSG + " getValue(Object current, String key) in " + this.getClass() + " key=" + key);
	}

	// Object current,
	public Type getType(String key) {
		throw new RuntimeException(ERR_MSG + " getType(String key) in " + this.getClass() + " key=" + key);
	}

	/**
	 * add a value in an array json object.
	 */
	public void addValue(Object current, Object value) throws ParseException, IOException {
		throw new RuntimeException(ERR_MSG + " addValue(Object current, Object value) in " + this.getClass());
	}

	/**
	 * use to instantiate a new object that will be used as an object
	 */
	public Object createObject() {
		throw new RuntimeException(ERR_MSG + " createObject() in " + this.getClass());
	}

	/**
	 * use to instantiate a new object that will be used as an array
	 */
	public Object createArray() {
		throw new RuntimeException(ERR_MSG + " createArray() in " + this.getClass());
	}

	/**
	 * Allow a mapper to convert a temporary structure to the final data format.
	 * 
	 * example: convert an List<Integer> to an int[]
	 */
	@SuppressWarnings("unchecked")
	public T convert(Object current) {
		return (T) current;
	}
}