UnknownUnwrapTypeException: Cannot unwrap to requested type [javax.sql.DataSource]

[A Misa]

I know that this question has been answered before, but none of the responses seem to help me, since i am not using a datasource in my project.
I a have a Maven project, integrated with Spring and Hibernate, connecting to a SQL Server 2014 database.
This is my pom.xml, where you can see the versions:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>BachelorDegree</groupId>    <artifactId>BuildingAdministration</artifactId>    <packaging>war</packaging>    <version>0.0.1-SNAPSHOT</version>    <name>BuildingAdministration Maven Webapp</name>    <url>http://maven.apache.org</url>    <build>        <finalName>BuildingAdministration</finalName>        <plugins>            <plugin>                <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-compiler-plugin</artifactId>                <version>3.2</version>                <configuration>                    <source>1.8</source>                    <target>1.8</target>                </configuration>            </plugin>        </plugins>    </build>    <properties>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>        <spring.version>4.3.1.RELEASE</spring.version>        <spring-security.version>4.1.1.RELEASE</spring-security.version>        <hibernate.version>5.2.1.Final</hibernate.version>        <hibernate.ga.version>3.5.4-Final</hibernate.ga.version>        <hibernate-annotation.version>3.5.6-Final</hibernate-annotation.version>        <javax-servlet-api.version>3.1.0</javax-servlet-api.version>        <jquery.version>2.1.1</jquery.version>        <bootstrap.version>3.2.0</bootstrap.version>        <javax-servlet.version>1.2</javax-servlet.version>        <log4j.version>2.6.2</log4j.version>        <spring.simple>2.5.6</spring.simple>        <jta.version>1.1</jta.version>        <aspectjweaver.version>1.8.9</aspectjweaver.version>    </properties>    <dependencies>        <dependency>            <groupId>org.apache.logging.log4j</groupId>            <artifactId>log4j-api</artifactId>            <version>${log4j.version}</version>        </dependency>        <dependency>            <groupId>org.apache.logging.log4j</groupId>            <artifactId>log4j-core</artifactId>            <version>${log4j.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-orm</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-beans</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework.security</groupId>            <artifactId>spring-security-web</artifactId>            <version>${spring-security.version}</version>        </dependency>        <dependency>            <groupId>org.springframework.security</groupId>            <artifactId>spring-security-config</artifactId>            <version>${spring-security.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-web</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>            <scope>provided</scope>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-core</artifactId>        </dependency>        <!-- spring-context which provides core functionality -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>        </dependency>        <!-- The spring-aop module provides an AOP Alliance-compliant aspect-oriented            programming implementation allowing you to define -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-aop</artifactId>        </dependency>        <!-- The spring-webmvc module (also known as the Web-Servlet module) contains            Spring’s model-view-controller (MVC) and REST Web Services implementation            for web applications -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-tx</artifactId>        </dependency>        <!-- http://mvnrepository.com/artifact/org.springframework.security/spring-security-taglibs -->        <dependency>            <groupId>org.springframework.security</groupId>            <artifactId>spring-security-taglibs</artifactId>        </dependency>        <!-- <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-annotations</artifactId>            <version>${hibernate-annotation.version}</version> </dependency> -->        <!-- <dependency> <groupId>org.hibernate.javax.persistence</groupId> <artifactId>hibernate-jpa-2.0-api</artifactId>            <version>1.0.1.Final</version> </dependency> -->        <dependency>            <groupId>org.hibernate</groupId>            <artifactId>hibernate-core</artifactId>        </dependency>        <dependency>            <groupId>org.hibernate</groupId>            <artifactId>hibernate-entitymanager</artifactId>        </dependency>        <!-- <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate</artifactId>            <version>${hibernate.ga.version}</version> </dependency> -->        <dependency>            <groupId>org.hibernate</groupId>            <artifactId>hibernate</artifactId>            <version>${hibernate.ga.version}</version>            <type>pom</type>        </dependency>        <dependency>            <groupId>javax.transaction</groupId>            <artifactId>jta</artifactId>            <version>${jta.version}</version>        </dependency>        <dependency>            <groupId>org.webjars</groupId>            <artifactId>jquery</artifactId>        </dependency>        <dependency>            <groupId>org.webjars</groupId>            <artifactId>bootstrap</artifactId>            <exclusions>                <exclusion>                    <groupId>org.webjars</groupId>                    <artifactId>jquery</artifactId>                </exclusion>            </exclusions>        </dependency>        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>jstl</artifactId>        </dependency>        <dependency>            <groupId>org.aspectj</groupId>            <artifactId>aspectjweaver</artifactId>            <version>${aspectjweaver.version}</version>        </dependency>        <dependency>            <groupId>org.hibernate</groupId>            <artifactId>hibernate-c3p0</artifactId>            <version>${hibernate.version}</version>        </dependency>        <dependency>            <groupId>org.hibernate</groupId>            <artifactId>hibernate-ehcache</artifactId>            <version>${hibernate.version}</version>        </dependency>    </dependencies>    <repositories>        <repository>            <id>org.springframework.maven.milestone</id>            <name>Spring Maven Milestone Repository</name>            <url>http://repo.springsource.org/libs-milestone-local</url>            <snapshots>                <enabled>false</enabled>            </snapshots>        </repository>        <repository>            <id>apache.snapshots</id>            <name>Apache Release Distribution Repository</name>            <url>            http://repository.apache.org/snapshots        </url>        </repository>    </repositories>    <dependencyManagement>        <dependencies>            <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->            <dependency>                <groupId>org.springframework</groupId>                <artifactId>spring-core</artifactId>                <version>${spring.version}</version>            </dependency>            <dependency>                <groupId>org.springframework</groupId>                <artifactId>spring-context</artifactId>                <version>${spring.version}</version>            </dependency>            <dependency>                <groupId>org.springframework</groupId>                <artifactId>spring-aop</artifactId>                <version>${spring.version}</version>            </dependency>            <dependency>                <groupId>org.springframework</groupId>                <artifactId>spring-webmvc</artifactId>                <version>${spring.version}</version>            </dependency>            <dependency>                <groupId>org.springframework</groupId>                <artifactId>spring-tx</artifactId>                <version>${spring.version}</version>            </dependency>            <dependency>                <groupId>org.hibernate</groupId>                <artifactId>hibernate-core</artifactId>                <version>${hibernate.version}</version>                <exclusions>                    <exclusion>                        <groupId>org.hibernate</groupId>                        <artifactId>hibernate-annotations</artifactId>                    </exclusion>                </exclusions>            </dependency>            <dependency>                <groupId>org.hibernate</groupId>                <artifactId>hibernate-entitymanager</artifactId>                <version>${hibernate.version}</version>            </dependency>            <dependency>                <groupId>org.webjars</groupId>                <artifactId>jquery</artifactId>                <version>${jquery.version}</version>            </dependency>            <dependency>                <groupId>org.webjars</groupId>                <artifactId>bootstrap</artifactId>                <version>${bootstrap.version}</version>            </dependency>            <dependency>                <groupId>org.springframework.security</groupId>                <artifactId>spring-security-taglibs</artifactId>                <version>${spring-security.version}</version>            </dependency>            <dependency>                <groupId>javax.servlet</groupId>                <artifactId>jstl</artifactId>                <version>${javax-servlet.version}</version>            </dependency>        </dependencies>    </dependencyManagement> </project>

This is hibernate.cfg.xml:

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC        "-//Hibernate/Hibernate Configuration DTD//EN"        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration>    <session-factory>        <property name="connection.driver_class">com.microsoft.sqlserver.jdbc.SQLServerDriver        </property>        <property name="connection.url">jdbc:sqlserver://localhost:1433;databaseName=Licenta        </property>        <property name="connection.username">sa</property>        <property name="connection.password">admin9</property>        <property name="default_schema">dbo</property>        <property name="dialect">org.hibernate.dialect.SQLServerDialect        </property>        <property name="hbm2ddl.auto">create</property>        <!-- Disable the second-level cache -->        <property name="cache.provider_class">org.cache.internal.NoCacheProvider        </property>        <!-- Echo all executed SQL to stdout -->        <property name="show_sql">true</property>        <!-- <property name="transaction.factory_class">org.transaction.JDBCTransactionFactory</property> -->        <property name="current_session_context_class">thread</property>    </session-factory> </hibernate-configuration>

And the class where i create the session factory:

@Configuration
@EnableTransactionManagement
@EnableWebSecurity
@EnableGlobalMethodSecurity
@Import({ SecurityConfig.class })
public class HibernateUtils { 

    @Autowired
    @Qualifier("sessionFactory")
    private static SessionFactory sessionFactory = buildSessionFactory();   

    @Bean
    private static SessionFactory buildSessionFactory() {
        try {
            if (sessionFactory == null) {
                org.hibernate.cfg.Configuration configuration = new org.hibernate.cfg.Configuration().configure("/hibernate.cfg.xml");
                addAnnotatedClasses(configuration);             
                ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(
                        configuration.getProperties()).build();

                sessionFactory = new org.hibernate.cfg.Configuration().configure().buildSessionFactory(serviceRegistry);
            }
            return sessionFactory;
        } catch (Throwable ex) {
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    @Bean
    @Autowired
    public HibernateTransactionManager transactionManager(SessionFactory sessionFactory) {
        System.out.println("enter transactionManager");
        HibernateTransactionManager txManager = new org.springframework.orm.hibernate5.HibernateTransactionManager();
        txManager.setSessionFactory(sessionFactory);

        return txManager;
    }

I use Tomcat 8. Whenever i run it, i get UnknownUnwrapTypeException: Cannot unwrap to requested type [javax.sql.DataSource]
I have tried adding the details for the c3p0 connection pool as i have seen in an earlier post and i don't get the error anymore, but the server doesn't start up either, just hangs there after creating the pool.
Can someone, please, help with that?

[A Misa]

UPDATE

Well, i have figured it out. Seems like, instead of my current sessionFactory creation, I should have had something like:

StandardServiceRegistryBuilder  serviceRegistryBuilder = new StandardServiceRegistryBuilder();  
                DataSource datasource = getDataSource();
                serviceRegistryBuilder.applySetting(Environment.DATASOURCE, datasource);
                serviceRegistryBuilder.applySettings(configuration.getProperties());
                Properties hibernateProperties = setHibernateProperties();
                serviceRegistryBuilder.applySettings(hibernateProperties);
                StandardServiceRegistry serviceRegistry = serviceRegistryBuilder.build();

                sessionFactory = configuration.buildSessionFactory(serviceRegistry); 

Which means i externalized the properties from hibernate.cfg.xml like that:

@Bean
public static DataSource getDataSource() {
    BasicDataSource dataSource = new BasicDataSource();
    dataSource.setDriverClassName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
    dataSource.setUrl("jdbc:sqlserver://localhost:1433;databaseName=Licenta");
    dataSource.setUsername("sa");
    dataSource.setPassword("admin9");
    return dataSource;
}

 private static Properties setHibernateProperties() {
     Properties properties = new Properties();
     properties.put("hibernate.dialect", "org.hibernate.dialect.SQLServer2008Dialect");
     properties.put("hibernate.hbm2ddl.auto", "create");
     properties.put("hibernate.show_sql", "true");
     return properties;        
}

Which is pretty ok for me, I am not really into xml configurations. But i still don't understand why i cannot import the properties from hibernate.cfg.xml. It should be a way of loading them, even though this kind of configuration isn't the newest or the most up to date.