Package org.hibernate.type

Class CollectionType

    • Field Detail

      • UNFETCHED_COLLECTION

        public static final Object UNFETCHED_COLLECTION

    • Constructor Detail

      • CollectionType

        public CollectionType​(String role,
                      String foreignKeyPropertyName)

    • Method Detail

      • getRole

        public String getRole()

      • isEqual

        public final boolean isEqual​(Object x,
                             Object y)
        Description copied from interface: Type
        Compare two instances of the class mapped by this type for persistence "equality", that is, equality of persistent state. For most types this could simply delegate to equals().

        This should always equate to some form of comparison of the value's internal state. As an example, for Java's Date class, the comparison should be of its internal state, but based only on the specific part which is persistent (the timestamp, date, or time).

        Specified by:
        isEqual in interface Type
        Overrides:
        isEqual in class AbstractType
        Parameters:
        x - The first value
        y - The second value
        Returns:
        True if there are considered equal (see discussion above).

      • getHashCode

        public int getHashCode​(Object x)
        Description copied from interface: Type
        Get a hash code, consistent with persistence "equality". For most types this could simply delegate to the given value's hashCode.
        Specified by:
        getHashCode in interface Type
        Overrides:
        getHashCode in class AbstractType
        Parameters:
        x - The value for which to retrieve a hash code
        Returns:
        The hash code

      • instantiate

        public abstract PersistentCollection<?> instantiate​(SharedSessionContractImplementor session,
                                                    CollectionPersister persister,
                                                    Object key)
        Instantiate an uninitialized collection wrapper or holder. Callers MUST add the holder to the persistence context!
        Parameters:
        session - The session from which the request is originating.
        persister - The underlying collection persister (metadata)
        key - The owner key.
        Returns:
        The instantiated collection.

      • nullSafeSet

        public final void nullSafeSet​(PreparedStatement st,
                              Object value,
                              int index,
                              boolean[] settable,
                              SharedSessionContractImplementor session)
                       throws HibernateException,
                              SQLException
        Description copied from interface: Type
        Bind a value represented by an instance of the mapped class to the given JDBC PreparedStatement, 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.
        Specified by:
        nullSafeSet in interface Type
        Parameters:
        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
        Throws:
        HibernateException - An error from Hibernate
        SQLException - An error from the JDBC driver

      • deepCopy

        public Object deepCopy​(Object value,
                       SessionFactoryImplementor factory)
        Description copied from interface: Type
        Return a deep copy of the persistent state, stopping at entities and at collections.
        Specified by:
        deepCopy in interface Type
        Parameters:
        value - The value to be copied
        factory - The session factory
        Returns:
        The deep copy

      • getName

        public String getName()
        Description copied from interface: Type
        Returns the abbreviated name of the type.
        Specified by:
        getName in interface Type
        Returns:
        the Hibernate type name

      • getElementsIterator

        public Iterator<?> getElementsIterator​(Object collection)
        Get an iterator over the element set of the collection, which may not yet be wrapped
        Parameters:
        collection - The collection to be iterated
        Returns:
        The element iterator

      • isMutable

        public boolean isMutable()
        Description copied from interface: 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.
        Specified by:
        isMutable in interface Type
        Returns:
        boolean

      • disassemble

        public Serializable disassemble​(Object value,
                                SharedSessionContractImplementor session,
                                Object owner)
                         throws HibernateException
        Description copied from interface: Type
        Return a disassembled representation of the object. This is the representation that is stored in the second-level cache.

        A reference to an associated entity should be disassembled to its primary key value.

        Specified by:
        disassemble in interface Type
        Overrides:
        disassemble in class AbstractType
        Parameters:
        value - the value to cache
        session - the originating session
        owner - optional parent entity object (needed for collections)
        Returns:
        the disassembled, deep cloned state
        Throws:
        HibernateException - An error from Hibernate

      • isDirty

        public boolean isDirty​(Object old,
                       Object current,
                       boolean[] checkable,
                       SharedSessionContractImplementor session)
                throws HibernateException
        Description copied from interface: Type
        Should the parent be considered dirty, given both the old and current value?
        Specified by:
        isDirty in interface Type
        Parameters:
        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.
        Returns:
        true if the field is dirty
        Throws:
        HibernateException - A problem occurred performing the checking

      • wrap

        public abstract PersistentCollection<?> wrap​(SharedSessionContractImplementor session,
                                             Object collection)
        Wrap the naked collection instance in a wrapper, or instantiate a holder. Callers MUST add the holder to the persistence context!
        Parameters:
        session - The session from which the request is originating.
        collection - The bare collection to be wrapped.
        Returns:
        The wrapped collection.

      • isAssociationType

        public boolean isAssociationType()
        Note: return true because this type is castable to AssociationType. Not because all collections are associations.
        Specified by:
        isAssociationType in interface Type
        Overrides:
        isAssociationType in class AbstractType
        Returns:
        True if this type is also an AssociationType implementor; false otherwise.

      • getKeyOfOwner

        public Object getKeyOfOwner​(Object owner,
                            SharedSessionContractImplementor session)
        Get the key value from the owning entity instance, usually the identifier, but might be some other unique key, in the case of property-ref
        Parameters:
        owner - The collection owner
        session - The session from which the request is originating.
        Returns:
        The collection owner's key

      • getIdOfOwnerOrNull

        public Object getIdOfOwnerOrNull​(Object key,
                                 SharedSessionContractImplementor session)
        Get the id value from the owning entity key, usually the same as the key, but might be some other property, in the case of property-ref
        Parameters:
        key - The collection owner key
        session - The session from which the request is originating.
        Returns:
        The collection owner's id, if it can be obtained from the key; otherwise, null is returned

      • isArrayType

        public boolean isArrayType()

      • useLHSPrimaryKey

        public boolean useLHSPrimaryKey()
        Description copied from interface: AssociationType
        Is the primary key of the owning entity table to be used in the join?
        Specified by:
        useLHSPrimaryKey in interface AssociationType

      • getRHSUniqueKeyPropertyName

        public String getRHSUniqueKeyPropertyName()
        Description copied from interface: AssociationType
        The name of a unique property of the associated entity that provides the join key (null if the identifier of an entity, or key of a collection)
        Specified by:
        getRHSUniqueKeyPropertyName in interface AssociationType

      • replaceElements

        public Object replaceElements​(Object original,
                              Object target,
                              Object owner,
                              Map<Object,​Object> copyCache,
                              SharedSessionContractImplementor session)
        Replace the elements of a collection with the elements of another collection.
        Parameters:
        original - The 'source' of the replacement elements (where we copy from)
        target - The target of the replacement elements (where we copy to)
        owner - The owner of the collection being merged
        copyCache - The map of elements already replaced.
        session - The session from which the merge event originated.
        Returns:
        The merged collection.

      • instantiateResult

        protected Object instantiateResult​(Object original)
        Instantiate a new "underlying" collection exhibiting the same capacity characteristics and the passed "original".
        Parameters:
        original - The original collection.
        Returns:
        The newly instantiated collection.

      • instantiate

        public abstract Object instantiate​(int anticipatedSize)
        Instantiate an empty instance of the "underlying" collection (not a wrapper), but with the given anticipated size (i.e. accounting for initial capacity and perhaps load factor).
        Parameters:
        anticipatedSize - The anticipated size of the instantiated collection after we are done populating it.
        Returns:
        A newly instantiated collection to be wrapped.

      • replace

        public Object replace​(Object original,
                      Object target,
                      SharedSessionContractImplementor session,
                      Object owner,
                      Map<Object,​Object> copyCache)
               throws HibernateException
        Description copied from interface: 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.
        Specified by:
        replace in interface Type
        Parameters:
        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
        Returns:
        the value to be merged
        Throws:
        HibernateException - An error from Hibernate

      • getElementType

        public final Type getElementType​(SessionFactoryImplementor factory)
                          throws MappingException
        Get the Hibernate type of the collection elements
        Parameters:
        factory - The session factory.
        Returns:
        The type of the collection elements
        Throws:
        MappingException - Indicates the underlying persister could not be located.

      • getCollection

        public Object getCollection​(Object key,
                            SharedSessionContractImplementor session,
                            Object owner,
                            Boolean overridingEager)
        instantiate a collection wrapper (called when loading an object)
        Parameters:
        key - The collection owner key
        session - The session from which the request is originating.
        owner - The collection owner
        Returns:
        The collection

      • hasHolder

        public boolean hasHolder()

      • initializeImmediately

        protected boolean initializeImmediately()

      • getLHSPropertyName

        public String getLHSPropertyName()
        Description copied from interface: AssociationType
        Get the name of a property in the owning entity that provides the join key (null if the identifier)
        Specified by:
        getLHSPropertyName in interface AssociationType

      • isAlwaysDirtyChecked

        public boolean isAlwaysDirtyChecked()
        We always need to dirty check the collection because we sometimes need to increment version number of owner and also because of how assemble/disassemble is implemented for uks
        Specified by:
        isAlwaysDirtyChecked in interface AssociationType

      • toColumnNullness

        public boolean[] toColumnNullness​(Object value,
                                  Mapping mapping)
        Description copied from interface: Type
        Given an instance of the type, return an array of boolean values indicating which mapped columns would be null.
        Specified by:
        toColumnNullness in interface Type
        Parameters:
        value - an instance of the type
        mapping - The mapping abstraction
        Returns:
        array indicating column nullness for a value instance