- java.lang.Object
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- java.io.ObjectInputStream.GetField
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- Enclosing class:
- ObjectInputStream
public abstract static class ObjectInputStream.GetField extends Object
Provide access to the persistent fields read from the input stream.
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Constructor Summary
Constructors Constructor Description GetField()
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description abstract booleandefaulted(String name)Return true if the named field is defaulted and has no value in this stream.abstract booleanget(String name, boolean val)Get the value of the named boolean field from the persistent field.abstract byteget(String name, byte val)Get the value of the named byte field from the persistent field.abstract charget(String name, char val)Get the value of the named char field from the persistent field.abstract doubleget(String name, double val)Get the value of the named double field from the persistent field.abstract floatget(String name, float val)Get the value of the named float field from the persistent field.abstract intget(String name, int val)Get the value of the named int field from the persistent field.abstract longget(String name, long val)Get the value of the named long field from the persistent field.abstract shortget(String name, short val)Get the value of the named short field from the persistent field.abstract Objectget(String name, Object val)Get the value of the named Object field from the persistent field.abstract ObjectStreamClassgetObjectStreamClass()Get the ObjectStreamClass that describes the fields in the stream.
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Method Detail
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getObjectStreamClass
public abstract ObjectStreamClass getObjectStreamClass()
Get the ObjectStreamClass that describes the fields in the stream.- Returns:
- the descriptor class that describes the serializable fields
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defaulted
public abstract boolean defaulted(String name) throws IOException
Return true if the named field is defaulted and has no value in this stream.- Parameters:
name- the name of the field- Returns:
- true, if and only if the named field is defaulted
- Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- ifnamedoes not correspond to a serializable field
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get
public abstract boolean get(String name, boolean val) throws IOException
Get the value of the named boolean field from the persistent field.- Parameters:
name- the name of the fieldval- the default value to use ifnamedoes not have a value- Returns:
- the value of the named
booleanfield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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get
public abstract byte get(String name, byte val) throws IOException
Get the value of the named byte field from the persistent field.- Parameters:
name- the name of the fieldval- the default value to use ifnamedoes not have a value- Returns:
- the value of the named
bytefield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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get
public abstract char get(String name, char val) throws IOException
Get the value of the named char field from the persistent field.- Parameters:
name- the name of the fieldval- the default value to use ifnamedoes not have a value- Returns:
- the value of the named
charfield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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get
public abstract short get(String name, short val) throws IOException
Get the value of the named short field from the persistent field.- Parameters:
name- the name of the fieldval- the default value to use ifnamedoes not have a value- Returns:
- the value of the named
shortfield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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get
public abstract int get(String name, int val) throws IOException
Get the value of the named int field from the persistent field.- Parameters:
name- the name of the fieldval- the default value to use ifnamedoes not have a value- Returns:
- the value of the named
intfield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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get
public abstract long get(String name, long val) throws IOException
Get the value of the named long field from the persistent field.- Parameters:
name- the name of the fieldval- the default value to use ifnamedoes not have a value- Returns:
- the value of the named
longfield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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get
public abstract float get(String name, float val) throws IOException
Get the value of the named float field from the persistent field.- Parameters:
name- the name of the fieldval- the default value to use ifnamedoes not have a value- Returns:
- the value of the named
floatfield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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get
public abstract double get(String name, double val) throws IOException
Get the value of the named double field from the persistent field.- Parameters:
name- the name of the fieldval- the default value to use ifnamedoes not have a value- Returns:
- the value of the named
doublefield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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get
public abstract Object get(String name, Object val) throws IOException
Get the value of the named Object field from the persistent field.- Parameters:
name- the name of the fieldval- the default value to use ifnamedoes not have a value- Returns:
- the value of the named
Objectfield - Throws:
IOException- if there are I/O errors while reading from the underlyingInputStreamIllegalArgumentException- if type ofnameis not serializable or if the field type is incorrect
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