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Java 7+ toolkit to quickly develop RFC 4627 JSON compatible applications.
There is a newer version: 4.0.1
/* Copyright 2006 FangYidong

   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 org.json.simple.parser;

import java.io.IOException;

/**
 * A simplified and stoppable SAX-like content handler for stream processing of JSON text. 
 * 
 * 
 * @see org.json.simple.parser.JSONParser#parse(java.io.Reader, ContentHandler, boolean)
 * 
 * @author FangYidong<[email protected]>
 * @deprecated since 2.0.0 it doesn't extend the SAX ContentHandler promoting bad practices and incompatible code.
 */
@Deprecated
public interface ContentHandler {
	/**
	 * Receive notification of the beginning of JSON processing.
	 * The parser will invoke this method only once.
     * 
	 * @throws ParseException 
	 * 			- JSONParser will stop and throw the same exception to the caller when receiving this exception.
	 * @throws IOException description omitted.
	 */
	void startJSON() throws ParseException, IOException;
	
	/**
	 * Receive notification of the end of JSON processing.
	 * 
	 * @throws ParseException description omitted.
	 * @throws IOException description omitted.
	 */
	void endJSON() throws ParseException, IOException;
	
	/**
	 * Receive notification of the beginning of a JSON object.
	 * 
	 * @return false if the handler wants to stop parsing after return.
	 * @throws ParseException
     *          - JSONParser will stop and throw the same exception to the caller when receiving this exception.
	 * @throws IOException description omitted.
     * @see #endJSON
	 */
	boolean startObject() throws ParseException, IOException;
	
	/**
	 * Receive notification of the end of a JSON object.
	 * 
	 * @return false if the handler wants to stop parsing after return.
	 * @throws ParseException description omitted.
	 * @throws IOException description omitted.
     * 
     * @see #startObject
	 */
	boolean endObject() throws ParseException, IOException;
	
	/**
	 * Receive notification of the beginning of a JSON object entry.
	 * 
	 * @param key - Key of a JSON object entry. 
	 * 
	 * @return false if the handler wants to stop parsing after return.
	 * @throws ParseException description omitted.
	 * @throws IOException description omitted.
     * 
     * @see #endObjectEntry
	 */
	boolean startObjectEntry(String key) throws ParseException, IOException;
	
	/**
	 * Receive notification of the end of the value of previous object entry.
	 * 
	 * @return false if the handler wants to stop parsing after return.
	 * @throws ParseException description omitted.
	 * @throws IOException description omitted.
     * 
     * @see #startObjectEntry
	 */
	boolean endObjectEntry() throws ParseException, IOException;
	
	/**
	 * Receive notification of the beginning of a JSON array.
	 * 
	 * @return false if the handler wants to stop parsing after return.
	 * @throws ParseException description omitted.
	 * @throws IOException description omitted.
     * 
     * @see #endArray
	 */
	boolean startArray() throws ParseException, IOException;
	
	/**
	 * Receive notification of the end of a JSON array.
	 * 
	 * @return false if the handler wants to stop parsing after return.
	 * @throws ParseException description omitted.
	 * @throws IOException description omitted.
     * 
     * @see #startArray
	 */
	boolean endArray() throws ParseException, IOException;
	
	/**
	 * Receive notification of the JSON primitive values:
	 * 	java.lang.String,
	 * 	java.lang.Number,
	 * 	java.lang.Boolean
	 * 	null
	 * 
	 * @param value - Instance of the following:
	 * 			java.lang.String,
	 * 			java.lang.Number,
	 * 			java.lang.Boolean
	 * 			null
	 * 
	 * @return false if the handler wants to stop parsing after return.
	 * @throws ParseException description omitted.
	 * @throws IOException description omitted.
	 */
	boolean primitive(Object value) throws ParseException, IOException;
		
}