程序包 org.hibernate.type

类 MetaType

    • 字段详细资料

      • REGISTRATION_KEYS

        public static final String[] REGISTRATION_KEYS

    • 构造器详细资料

      • MetaType

        public MetaType​(Map<Object,​String> discriminatorValuesToEntityNameMap,
                Type baseType)

    • 方法详细资料

      • getRegistrationKeys

        public String[] getRegistrationKeys()

      • getDiscriminatorValuesToEntityNameMap

        public Map<Object,​String> getDiscriminatorValuesToEntityNameMap()

      • dictatedSizes

        public Size[] dictatedSizes​(Mapping mapping)
                     throws MappingException
        从接口复制的说明: Type
        Return the column sizes dictated by this type. For example, the mapping for a char/Character would have a dictated length limit of 1; for a string-based UUID would have a size limit of 36; etc.

        NOTE: The number of elements in this array matches the return from Type.getColumnSpan(org.hibernate.engine.spi.Mapping).

        参数:
        mapping - The mapping object :/
        返回:
        The dictated sizes.
        抛出:
        MappingException - Generally indicates an issue accessing the passed mapping object.

      • getColumnSpan

        public int getColumnSpan​(Mapping mapping)
                  throws MappingException
        从接口复制的说明: Type
        How many columns are used to persist this type. Always the same as sqlTypes(mapping).length
        参数:
        mapping - The mapping object :/
        返回:
        The number of columns
        抛出:
        MappingException - Generally indicates an issue accessing the passed mapping object.

      • nullSafeGet

        public Object nullSafeGet​(ResultSet rs,
                          String name,
                          SharedSessionContractImplementor session,
                          Object owner)
                   throws HibernateException,
                          SQLException
        从接口复制的说明: Type
        Extract a value of the mapped class from the JDBC result set. Implementors should handle possibility of null values. This form might be called if the type is known to be a single-column type.
        参数:
        rs - The result set from which to extract value.
        name - the column name making up this type value (use to read from result set)
        session - The originating session
        owner - the parent entity
        返回:
        The extracted value
        抛出:
        HibernateException - An error from Hibernate
        SQLException - An error from the JDBC driver

      • nullSafeSet

        public void nullSafeSet​(PreparedStatement st,
                        Object value,
                        int index,
                        SharedSessionContractImplementor session)
                 throws HibernateException,
                        SQLException
        从接口复制的说明: Type
        Bind a value represented by an instance of the mapped class to the JDBC prepared statement. Implementors should handle possibility of null values. A multi-column type should bind parameters starting from index.
        参数:
        st - The JDBC prepared statement to which to bind
        value - the object to write
        index - starting parameter bind index
        session - The originating session
        抛出:
        HibernateException - An error from Hibernate
        SQLException - An error from the JDBC driver

      • nullSafeSet

        public void nullSafeSet​(PreparedStatement st,
                        Object value,
                        int index,
                        boolean[] settable,
                        SharedSessionContractImplementor session)
                 throws HibernateException,
                        SQLException
        从接口复制的说明: Type
        Bind a value represented by an instance of the mapped class to the JDBC prepared statement, ignoring some columns as dictated by the 'settable' parameter. Implementors should handle the possibility of null values. A multi-column type should bind parameters starting from index.
        参数:
        st - The JDBC prepared statement to which to bind
        value - the object to write
        index - starting parameter bind index
        settable - an array indicating which columns to bind/ignore
        session - The originating session
        抛出:
        HibernateException - An error from Hibernate
        SQLException - An error from the JDBC driver

      • getName

        public String getName()
        从接口复制的说明: Type
        Returns the abbreviated name of the type.
        返回:
        String the Hibernate type name

      • replace

        public Object replace​(Object original,
                      Object target,
                      SharedSessionContractImplementor session,
                      Object owner,
                      Map copyCache)
        从接口复制的说明: Type
        During merge, replace the existing (target) value in the entity we are merging to with a new (original) value from the detached entity we are merging. For immutable objects, or null values, it is safe to simply return the first parameter. For mutable objects, it is safe to return a copy of the first parameter. For objects with component values, it might make sense to recursively replace component values.
        参数:
        original - the value from the detached entity being merged
        target - the value in the managed entity
        session - The originating session
        owner - The owner of the value
        copyCache - The cache of already copied/replaced values
        返回:
        the value to be merged

      • isMutable

        public boolean isMutable()
        从接口复制的说明: Type
        Are objects of this type mutable. (With respect to the referencing object ... entities and collections are considered immutable because they manage their own internal state.)
        返回:
        boolean

      • toColumnNullness

        public boolean[] toColumnNullness​(Object value,
                                  Mapping mapping)
        从接口复制的说明: Type
        Given an instance of the type, return an array of boolean, indicating which mapped columns would be null.
        参数:
        value - an instance of the type
        mapping - The mapping abstraction
        返回:
        array indicating column nullness for a value instance

      • isDirty

        public boolean isDirty​(Object old,
                       Object current,
                       boolean[] checkable,
                       SharedSessionContractImplementor session)
                throws HibernateException
        从接口复制的说明: Type
        Should the parent be considered dirty, given both the old and current value?
        参数:
        old - the old value
        current - the current value
        checkable - An array of booleans indicating which columns making up the value are actually checkable
        session - The session from which the request originated.
        返回:
        true if the field is dirty
        抛出:
        HibernateException - A problem occurred performing the checking