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The AceQL Java Client JDBC Driver allows to wrap the AceQL HTTP APIs and eliminates the tedious works of handling communications errors and parsing JSON results. Android and Java Desktop application developers can access remote SQL databases and/or SQL databases in the cloud by simply including standard JDBC calls in their code, just like they would for a local database.

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/*
 * This file is part of AceQL JDBC Driver.
 * AceQL JDBC Driver: Remote JDBC access over HTTP with AceQL HTTP.
 * Copyright (c) 2023,  KawanSoft SAS
 * (http://www.kawansoft.com). All rights reserved.
 *
 * 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 com.aceql.jdbc.commons.main.util.json;

import java.io.FileNotFoundException;
import java.io.Reader;
import java.io.UnsupportedEncodingException;

import javax.json.Json;
import javax.json.stream.JsonParser;

/**
 * Tool go generic parsing. See
 * https://docs.oracle.com/javaee/7/tutorial/jsonp003.htm
 *
 * @author Nicolas de Pomereu
 *
 */
public class JsonStreamParserUtil {

    /**
     * Protected
     */
    protected JsonStreamParserUtil() {

    }

    /**
     *
     * AceQLResultSet
     *
     * Todo : 1) Extract "status". if "status" = "OK" ==> find "row_count" and
     * return it if "status" = "FAIL" ==> find "error_type" and "error_message"
     * and return them if "row_count" = 0 ==> No rows else 2) Navigate in rows
     *
     *
     * 2)Navigate in rows - Go to row_i ==> From START_ARRAY to END_ARRAY ==>
     * Retrieve all values and create a row of Result Set
     *
     * @param reader
     * @throws UnsupportedEncodingException
     * @throws FileNotFoundException
     */
    public static void parseWithStreaming(Reader reader)
	    throws UnsupportedEncodingException, FileNotFoundException {
	System.out.println();
	JsonParser parser = Json.createParser(reader);
	while (parser.hasNext()) {
	    JsonParser.Event event = parser.next();
	    switch (event) {
	    case START_ARRAY:
	    case END_ARRAY:
	    case START_OBJECT:
	    case END_OBJECT:
	    case VALUE_FALSE:
	    case VALUE_NULL:
	    case VALUE_TRUE:
		System.out.println("---" + event.toString());
		break;
	    case KEY_NAME:
		System.out.print(
			event.toString() + " " + parser.getString() + " - ");
		break;
	    case VALUE_STRING:
	    case VALUE_NUMBER:
		System.out.println(event.toString() + " " + parser.getString());
		break;
	    default:
		// Don't know
	    }
	}
    }

}