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The AceQL Java Client SDK allows to wrap the AceQL HTTP APIs and eliminate 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 Client SDK.
 * AceQL Client SDK: Remote JDBC access over HTTP with AceQL HTTP.                                 
 * Copyright (C) 2020,  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.client.jdbc.util;

import java.sql.Connection;
import java.sql.ResultSet;

public class AceQLConnectionUtil {

    private static final String TRANSACTION_NONE_TEXT = "none";
    private static final String TRANSACTION_SERIALIZABLE_TEXT = "serializable";
    private static final String TRANSACTION_REPEATABLE_READ_TEXT = "repeatable_read";
    private static final String TRANSACTION_READ_COMMITTED_TEXT = "read_committed";
    private static final String TRANSACTION_READ_UNCOMMITTED_TEXT = "read_uncommitted";

    protected AceQLConnectionUtil() {

    }

    public static int getTransactionIsolation(String level) {

	if (level == null) {
	    return 0;
	}

	if (level.equals(TRANSACTION_READ_UNCOMMITTED_TEXT)) {
	    return Connection.TRANSACTION_READ_UNCOMMITTED;
	} else if (level.equals(TRANSACTION_READ_COMMITTED_TEXT)) {
	    return Connection.TRANSACTION_READ_COMMITTED;
	} else if (level.equals(TRANSACTION_REPEATABLE_READ_TEXT)) {
	    return Connection.TRANSACTION_REPEATABLE_READ;
	} else if (level.equals(TRANSACTION_SERIALIZABLE_TEXT)) {
	    return Connection.TRANSACTION_SERIALIZABLE;
	} else {
	    return 0;
	}
    }

    public static String getTransactionIsolationAsString(
	    int transactionIsolationLevel) {

	if (transactionIsolationLevel == Connection.TRANSACTION_NONE) {
	    return TRANSACTION_NONE_TEXT;
	} else if (transactionIsolationLevel == Connection.TRANSACTION_READ_COMMITTED) {
	    return TRANSACTION_READ_COMMITTED_TEXT;
	} else if (transactionIsolationLevel == Connection.TRANSACTION_READ_UNCOMMITTED) {
	    return TRANSACTION_READ_UNCOMMITTED_TEXT;
	} else if (transactionIsolationLevel == Connection.TRANSACTION_REPEATABLE_READ) {
	    return TRANSACTION_REPEATABLE_READ_TEXT;
	} else if (transactionIsolationLevel == Connection.TRANSACTION_SERIALIZABLE) {
	    return TRANSACTION_SERIALIZABLE_TEXT;
	} else {
	    throw new IllegalArgumentException(
		    "Unsupported transaction isolation level: "
			    + transactionIsolationLevel);
	}
    }

    public static int getHoldability(String holdability) {

	if (holdability == null) {
	    return 0;
	}

	if (holdability.equals("hold_cursors_over_commit")) {
	    return ResultSet.HOLD_CURSORS_OVER_COMMIT;
	} else if (holdability.equals("close_cursors_at_commit")) {
	    return ResultSet.CLOSE_CURSORS_AT_COMMIT;
	} else {
	    return 0;
	}
    }

    public static String getHoldabilityAsString(int holdability) {

	if (holdability == ResultSet.HOLD_CURSORS_OVER_COMMIT) {
	    return "hold_cursors_over_commit";
	} else if (holdability == ResultSet.CLOSE_CURSORS_AT_COMMIT) {
	    return "close_cursors_at_commit";
	} else {
	    throw new IllegalArgumentException(
		    "Unsupported Holdability: " + holdability);
	}
    }

}