org.kawanfw.sql.api.server.firewall.DenyDclManager Maven / Gradle / Ivy

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/*
 * Copyright (c)2022 KawanSoft S.A.S. All rights reserved.
 * 
 * Use of this software is governed by the Business Source License included
 * in the LICENSE.TXT file in the project's root directory.
 *
 * Change Date: 2026-11-01
 *
 * On the date above, in accordance with the Business Source License, use
 * of this software will be governed by version 2.0 of the Apache License.
 */
package org.kawanfw.sql.api.server.firewall;

import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;

import org.kawanfw.sql.api.server.SqlEvent;
import org.kawanfw.sql.api.server.StatementAnalyzer;

/**
 * Firewall manager that denies any DCL (Data Control Language) call.
 *
 * @author Nicolas de Pomereu
 * @since 4.0
 */
public class DenyDclManager implements SqlFirewallManager {

    /**
     * @return false if the SQL statement is DCL (Data Control
     *         Language).
     */
    @Override
    public boolean allowSqlRunAfterAnalysis(SqlEvent sqlEvent, Connection connection) throws IOException, SQLException {
	StatementAnalyzer analyzer = new StatementAnalyzer(sqlEvent.getSql(), sqlEvent.getParameterValues());
	return !analyzer.isDcl();
    }
    
	/**
     * @return true. (Client programs will be allowed to create
     *         raw Statement, i.e. call statements without parameters.)
     */
    @Override
    public boolean allowStatementClass(String username, String database, Connection connection)
	    throws IOException, SQLException {
	return true;
    }


    /**
     * @return true. (Client programs will be allowed to call
     *         the Metadata Query API).
     */
    @Override
    public boolean allowMetadataQuery(String username, String database, Connection connection)
	    throws IOException, SQLException {
	return true;
    }

}