Package java.io

Class ObjectInputStream.GetField

java.lang.Object

java.io.ObjectInputStream.GetField

Enclosing class:

ObjectInputStream

public abstract static class ObjectInputStream.GetField
extends Object

GetField is an inner class that provides access to the persistent fields read from the source stream.

Constructor Summary

Constructors

Constructor	Description
GetField()

Method Summary

Modifier and Type	Method	Description
abstract boolean	defaulted(String name)	Indicates if the field identified by name is defaulted.
abstract boolean	get(String name, boolean defaultValue)	Gets the value of the boolean field identified by name from the persistent field.
abstract byte	get(String name, byte defaultValue)	Gets the value of the byte field identified by name from the persistent field.
abstract char	get(String name, char defaultValue)	Gets the value of the character field identified by name from the persistent field.
abstract double	get(String name, double defaultValue)	Gets the value of the double field identified by name from the persistent field.
abstract float	get(String name, float defaultValue)	Gets the value of the float field identified by name from the persistent field.
abstract int	get(String name, int defaultValue)	Gets the value of the integer field identified by name from the persistent field.
abstract long	get(String name, long defaultValue)	Gets the value of the long field identified by name from the persistent field.
abstract short	get(String name, short defaultValue)	Gets the value of the short field identified by name from the persistent field.
abstract Object	get(String name, Object defaultValue)	Gets the value of the object field identified by name from the persistent field.
abstract ObjectStreamClass	getObjectStreamClass()	Gets the ObjectStreamClass that describes a field.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GetField

public GetField()

Method Detail

getObjectStreamClass

public abstract ObjectStreamClass getObjectStreamClass()

Gets the ObjectStreamClass that describes a field.

Returns:

the descriptor class for a serialized field.

defaulted

public abstract boolean defaulted(String name)
                           throws IOException,
                                  IllegalArgumentException

Indicates if the field identified by name is defaulted. This means that it has no value in this stream.

Parameters:

name - the name of the field to check.

Returns:

true if the field is defaulted, false otherwise.

Throws:

IllegalArgumentException - if name does not identify a serializable field.

IOException - if an error occurs while reading from the source input stream.

get

public abstract boolean get(String name,
                            boolean defaultValue)
                     throws IOException,
                            IllegalArgumentException

Gets the value of the boolean field identified by name from the persistent field.

Parameters:

name - the name of the field to get.

defaultValue - the default value that is used if the field does not have a value when read from the source stream.

Returns:

the value of the field identified by name.

Throws:

IOException - if an error occurs while reading from the source input stream.

IllegalArgumentException - if the type of the field identified by name is not boolean.

get

public abstract char get(String name,
                         char defaultValue)
                  throws IOException,
                         IllegalArgumentException

Gets the value of the character field identified by name from the persistent field.

Parameters:

name - the name of the field to get.

defaultValue - the default value that is used if the field does not have a value when read from the source stream.

Returns:

the value of the field identified by name.

Throws:

IOException - if an error occurs while reading from the source input stream.

IllegalArgumentException - if the type of the field identified by name is not char.

get

public abstract byte get(String name,
                         byte defaultValue)
                  throws IOException,
                         IllegalArgumentException

Gets the value of the byte field identified by name from the persistent field.

Parameters:

name - the name of the field to get.

defaultValue - the default value that is used if the field does not have a value when read from the source stream.

Returns:

the value of the field identified by name.

Throws:

IOException - if an error occurs while reading from the source input stream.

IllegalArgumentException - if the type of the field identified by name is not byte.

get

public abstract short get(String name,
                          short defaultValue)
                   throws IOException,
                          IllegalArgumentException

Gets the value of the short field identified by name from the persistent field.

Parameters:

name - the name of the field to get.

defaultValue - the default value that is used if the field does not have a value when read from the source stream.

Returns:

the value of the field identified by name.

Throws:

IOException - if an error occurs while reading from the source input stream.

IllegalArgumentException - if the type of the field identified by name is not short.

get

public abstract int get(String name,
                        int defaultValue)
                 throws IOException,
                        IllegalArgumentException

Gets the value of the integer field identified by name from the persistent field.

Parameters:

name - the name of the field to get.

defaultValue - the default value that is used if the field does not have a value when read from the source stream.

Returns:

the value of the field identified by name.

Throws:

IOException - if an error occurs while reading from the source input stream.

IllegalArgumentException - if the type of the field identified by name is not int.

get

public abstract long get(String name,
                         long defaultValue)
                  throws IOException,
                         IllegalArgumentException

Gets the value of the long field identified by name from the persistent field.

Parameters:

name - the name of the field to get.

defaultValue - the default value that is used if the field does not have a value when read from the source stream.

Returns:

the value of the field identified by name.

Throws:

IOException - if an error occurs while reading from the source input stream.

IllegalArgumentException - if the type of the field identified by name is not long.

get

public abstract float get(String name,
                          float defaultValue)
                   throws IOException,
                          IllegalArgumentException

Gets the value of the float field identified by name from the persistent field.

Parameters:

name - the name of the field to get.

defaultValue - the default value that is used if the field does not have a value when read from the source stream.

Returns:

the value of the field identified by name.

Throws:

IOException - if an error occurs while reading from the source input stream.

IllegalArgumentException - if the type of the field identified by float is not char.

get

public abstract double get(String name,
                           double defaultValue)
                    throws IOException,
                           IllegalArgumentException

Gets the value of the double field identified by name from the persistent field.

Parameters:

name - the name of the field to get.

defaultValue - the default value that is used if the field does not have a value when read from the source stream.

Returns:

the value of the field identified by name.

Throws:

IOException - if an error occurs while reading from the source input stream.

IllegalArgumentException - if the type of the field identified by name is not double.

get

public abstract Object get(String name,
                           Object defaultValue)
                    throws IOException,
                           IllegalArgumentException

Gets the value of the object field identified by name from the persistent field.

Parameters:

name - the name of the field to get.

defaultValue - the default value that is used if the field does not have a value when read from the source stream.

Returns:

the value of the field identified by name.

Throws:

IOException - if an error occurs while reading from the source input stream.

IllegalArgumentException - if the type of the field identified by name is not Object.