Class ObjectStreamField
java.lang.Object
java.io.ObjectStreamField
- All Implemented Interfaces:
Comparable<Object>
A description of a Serializable field from a Serializable class. An array
of ObjectStreamFields is used to declare the Serializable fields of a class.
- Since:
- 1.2
- See Also:
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Constructor Summary
ConstructorDescriptionObjectStreamField
(String name, Class<?> type) Create a Serializable field with the specified type.ObjectStreamField
(String name, Class<?> type, boolean unshared) Creates an ObjectStreamField representing a serializable field with the given name and type. -
Method Summary
Modifier and TypeMethodDescriptionint
Compare this field with anotherObjectStreamField
.getName()
Get the name of this field.int
Offset of field within instance data.Class
<?> getType()
Get the type of the field.char
Returns character encoding of field type.Return the JVM type signature.boolean
Return true if this field has a primitive type.boolean
Returns boolean value indicating whether or not the serializable field represented by this ObjectStreamField instance is unshared.protected void
setOffset
(int offset) Offset within instance data.toString()
Return a string that describes this field.
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Constructor Details
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ObjectStreamField
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ObjectStreamField
Creates an ObjectStreamField representing a serializable field with the given name and type. If unshared is false, values of the represented field are serialized and deserialized in the default manner--if the field is non-primitive, object values are serialized and deserialized as if they had been written and read by calls to writeObject and readObject. If unshared is true, values of the represented field are serialized and deserialized as if they had been written and read by calls to writeUnshared and readUnshared.- Parameters:
name
- field nametype
- field typeunshared
- if false, write/read field values in the same manner as writeObject/readObject; if true, write/read in the same manner as writeUnshared/readUnshared- Since:
- 1.4
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Method Details
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getName
Get the name of this field.- Returns:
- a
String
representing the name of the serializable field
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getType
Get the type of the field. If the type is non-primitive and thisObjectStreamField
was obtained from a deserializedObjectStreamClass
instance, thenObject.class
is returned. Otherwise, theClass
object for the type of the field is returned.- Returns:
- a
Class
object representing the type of the serializable field
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getTypeCode
public char getTypeCode()Returns character encoding of field type. The encoding is as follows:B byte C char D double F float I int J long L class or interface S short Z boolean [ array
- Returns:
- the typecode of the serializable field
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getTypeString
Return the JVM type signature.- Returns:
- null if this field has a primitive type.
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getOffset
public int getOffset()Offset of field within instance data.- Returns:
- the offset of this field
- See Also:
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setOffset
protected void setOffset(int offset) Offset within instance data.- Parameters:
offset
- the offset of the field- See Also:
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isPrimitive
public boolean isPrimitive()Return true if this field has a primitive type.- Returns:
- true if and only if this field corresponds to a primitive type
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compareTo
Compare this field with anotherObjectStreamField
. Return -1 if this is smaller, 0 if equal, 1 if greater. Types that are primitives are "smaller" than object types. If equal, the field names are compared.- Specified by:
compareTo
in interfaceComparable<Object>
- Parameters:
obj
- the object to be compared.- Returns:
- a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object.
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toString
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