Module openj9.dtfj

Package com.ibm.dtfj.java

Interface JavaField

All Superinterfaces:

JavaMember

public interface JavaField
extends JavaMember

Represents a Java field declaration.

This interface is modeled on java.lang.reflect.Field.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)	Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
Object	get(JavaObject object)	Get the contents of an Object field
boolean	getBoolean(JavaObject object)	Get the contents of a boolean field
byte	getByte(JavaObject object)	Get the contents of a byte field
char	getChar(JavaObject object)	Get the contents of a char field
double	getDouble(JavaObject object)	Get the contents of a double field
float	getFloat(JavaObject object)	Get the contents of a float field
int	getInt(JavaObject object)	Get the contents of an int field
long	getLong(JavaObject object)	Get the contents of a long field
short	getShort(JavaObject object)	Get the contents of a short field
String	getString(JavaObject object)	Get the contents of a string field
default boolean	isNestedPacked()	Deprecated.
default boolean	isNestedPackedArray()	Deprecated.

Methods declared in interface com.ibm.dtfj.java.JavaMember

getDeclaringClass, getModifiers, getName, getSignature, hashCode

Method Details

get

Object get(JavaObject object)
    throws CorruptDataException,
MemoryAccessException

Get the contents of an Object field

Parameters:

object - to fetch the field from. Ignored for static fields.

Returns:

a JavaObject instance for reference type fields, an instance of a subclass of Number, Boolean, or Character for primitive fields, or null for null reference fields.

This field must be declared in the object's class or in a superclass

Throws:

CorruptDataException

MemoryAccessException

NullPointerException - if the field is an instance field, and object is null

IllegalArgumentException - if the specified object is not appropriate for this field

See Also:

• JavaObject
• Byte
• Double
• Float
• Integer
• Long
• Short
• Character
• Boolean

getBoolean

boolean getBoolean(JavaObject object)
            throws CorruptDataException,
MemoryAccessException

Get the contents of a boolean field

Parameters:

object - to fetch the field from. Ignored for static fields.

Returns:

the field contents

Throws:

CorruptDataException

MemoryAccessException

NullPointerException - if the field is an instance field, and object is null

IllegalArgumentException - if the specified object is not appropriate for this field, or if the type of the field cannot be converted to boolean

getByte

byte getByte(JavaObject object)
      throws CorruptDataException,
MemoryAccessException

Get the contents of a byte field

Parameters:

object - to fetch the field from. Ignored for static fields.

Returns:

the field contents

Throws:

CorruptDataException

MemoryAccessException

NullPointerException - if the field is an instance field, and object is null

IllegalArgumentException - if the specified object is not appropriate for this field, or if the type of the field cannot be converted to byte

getChar

char getChar(JavaObject object)
      throws CorruptDataException,
MemoryAccessException

Get the contents of a char field

Parameters:

object - to fetch the field from. Ignored for static fields.

Returns:

the field contents

Throws:

CorruptDataException

MemoryAccessException

NullPointerException - if the field is an instance field, and object is null

IllegalArgumentException - if the specified object is not appropriate for this field, or if the type of the field cannot be converted to char

getDouble

double getDouble(JavaObject object)
          throws CorruptDataException,
MemoryAccessException

Get the contents of a double field

Parameters:

object - to fetch the field from. Ignored for static fields.

Returns:

the field contents

Throws:

CorruptDataException

MemoryAccessException

NullPointerException - if the field is an instance field, and object is null

IllegalArgumentException - if the specified object is not appropriate for this field, or if the type of the field cannot be converted to double

getFloat

float getFloat(JavaObject object)
        throws CorruptDataException,
MemoryAccessException

Get the contents of a float field

Parameters:

object - to fetch the field from. Ignored for static fields.

Returns:

the field contents

Throws:

CorruptDataException

MemoryAccessException

NullPointerException - if the field is an instance field, and object is null

IllegalArgumentException - if the specified object is not appropriate for this field, or if the type of the field cannot be converted to float

getInt

int getInt(JavaObject object)
    throws CorruptDataException,
MemoryAccessException

Get the contents of an int field

Parameters:

object - to fetch the field from. Ignored for static fields.

Returns:

the field contents

Throws:

CorruptDataException

MemoryAccessException

NullPointerException - if the field is an instance field, and object is null

IllegalArgumentException - if the specified object is not appropriate for this field, or if the type of the field cannot be converted to int

getLong

long getLong(JavaObject object)
      throws CorruptDataException,
MemoryAccessException

Get the contents of a long field

Parameters:

object - to fetch the field from. Ignored for static fields.

Returns:

the field contents

Throws:

CorruptDataException

MemoryAccessException

NullPointerException - if the field is an instance field, and object is null

IllegalArgumentException - if the specified object is not appropriate for this field, or if the type of the field cannot be converted to long

getShort

short getShort(JavaObject object)
        throws CorruptDataException,
MemoryAccessException

Get the contents of a short field

Parameters:

object - to fetch the field from. Ignored for static fields.

Returns:

the field contents

Throws:

CorruptDataException

MemoryAccessException

NullPointerException - if the field is an instance field, and object is null

IllegalArgumentException - if the specified object is not appropriate for this field, or if the type of the field cannot be converted to short

getString

String getString(JavaObject object)
          throws CorruptDataException,
MemoryAccessException

Get the contents of a string field

Parameters:

object - to fetch the field from. Ignored for static fields.

Returns:

a String representing the value of the String field. Note that the instance returned can be null if the field was null in object.

Throws:

CorruptDataException

MemoryAccessException

IllegalArgumentException - if the specified field is not a String

NullPointerException - if the field is an instance field, and object is null

equals

boolean equals(Object obj)

Description copied from class: Object

Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison. The implementation in Object answers true only if the argument is the exact same object as the receiver (==).

Specified by:

equals in interface JavaMember

Overrides:

equals in class Object

Parameters:

obj -

Returns:

True if the given object refers to the same Java Field in the image

See Also:

• Object.hashCode()

isNestedPacked

@Deprecated
default boolean isNestedPacked()
                        throws CorruptDataException,
MemoryAccessException

Deprecated.

Throws:

CorruptDataException

MemoryAccessException

isNestedPackedArray

@Deprecated
default boolean isNestedPackedArray()
                             throws CorruptDataException,
MemoryAccessException

Deprecated.

Throws:

CorruptDataException

MemoryAccessException