Class SerialStruct

public class SerialStruct
extends Object
implements Struct, Serializable, Cloneable

A serialized mapping in the Java programming language of an SQL structured type. Each attribute that is not already serialized is mapped to a serialized form, and if an attribute is itself a structured type, each of its attributes that is not already serialized is mapped to a serialized form.

In addition, the structured type is custom mapped to a class in the Java programming language if there is such a mapping, as are its attributes, if appropriate.

The SerialStruct class provides a constructor for creating an instance from a Struct object, a method for retrieving the SQL type name of the SQL structured type in the database, and methods for retrieving its attribute values.

Thread safety

A SerialStruct is not safe for use by multiple concurrent threads. If a SerialStruct is to be used by more than one thread then access to the SerialStruct should be controlled by appropriate synchronization.

Constructors

SerialStruct

public SerialStruct(Struct in,
                    Map<String,Class<?>> map)
             throws SerialException

Constructs a SerialStruct object from the given Struct object, using the given java.util.Map object for custom mapping the SQL structured type or any of its attributes that are SQL structured types.

Parameters:

in - an instance of Struct

map - a java.util.Map object in which each entry consists of 1) a String object giving the fully qualified name of a UDT and 2) the Class object for the SQLData implementation that defines how the UDT is to be mapped

Throws:

SerialException - if an error occurs

See Also:

Struct

SerialStruct

public SerialStruct(SQLData in,
                    Map<String,Class<?>> map)
             throws SerialException

Constructs a SerialStruct object from the given SQLData object, using the given type map to custom map it to a class in the Java programming language. The type map gives the SQL type and the class to which it is mapped. The SQLData object defines the class to which the SQL type will be mapped.

Parameters:

in - an instance of the SQLData class that defines the mapping of the SQL structured type to one or more objects in the Java programming language

map - a java.util.Map object in which each entry consists of 1) a String object giving the fully qualified name of a UDT and 2) the Class object for the SQLData implementation that defines how the UDT is to be mapped

Throws:

SerialException - if an error occurs

Methods

getSQLTypeName

public String getSQLTypeName()
                      throws SerialException

Retrieves the SQL type name for this SerialStruct object. This is the name used in the SQL definition of the structured type

Specified by:

getSQLTypeName in interface Struct

Returns:

a String object representing the SQL type name for the SQL structured type that this SerialStruct object represents

Throws:

SerialException - if an error occurs

getAttributes

public Object[] getAttributes()
                       throws SerialException

Retrieves an array of Object values containing the attributes of the SQL structured type that this SerialStruct object represents.

Specified by:

getAttributes in interface Struct

Returns:

an array of Object values, with each element being an attribute of the SQL structured type that this SerialStruct object represents

Throws:

SerialException - if an error occurs

getAttributes

public Object[] getAttributes(Map<String,Class<?>> map)
                       throws SerialException

Retrieves the attributes for the SQL structured type that this SerialStruct represents as an array of Object values, using the given type map for custom mapping if appropriate.

Specified by:

getAttributes in interface Struct

Parameters:

map - a java.util.Map object in which each entry consists of 1) a String object giving the fully qualified name of a UDT and 2) the Class object for the SQLData implementation that defines how the UDT is to be mapped

Returns:

an array of Object values, with each element being an attribute of the SQL structured type that this SerialStruct object represents

Throws:

SerialException - if an error occurs

equals

public boolean equals(Object obj)

Compares this SerialStruct to the specified object. The result is true if and only if the argument is not null and is a SerialStruct object whose attributes are identical to this object's attributes

Overrides:

equals in class Object

Parameters:

obj - The object to compare this SerialStruct against

Returns:

true if the given object represents a SerialStruct equivalent to this SerialStruct, false otherwise

See Also:

Object.hashCode(), HashMap

hashCode

public int hashCode()

Returns a hash code for this SerialStruct. The hash code for a SerialStruct object is computed using the hash codes of the attributes of the SerialStruct object and its SQLTypeName

Overrides:

hashCode in class Object

Returns:

a hash code value for this object.

See Also:

Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

clone

public Object clone()

Returns a clone of this SerialStruct. The copy will contain a reference to a clone of the underlying attribs array, not a reference to the original underlying attribs array of this SerialStruct object.

Overrides:

clone in class Object

Returns:

a clone of this SerialStruct

See Also:

Cloneable