EDU.purdue.cs.bloat.file

Class Field

java.lang.Object

EDU.purdue.cs.bloat.file.Field

All Implemented Interfaces:

FieldInfo

public class Field
extends java.lang.Object
implements FieldInfo

Field models a field (member variable) in a class. The Field class grants access to information such as the field's modifiers, its name and type descriptor (represented as indices into the constant pool), and any attributes of the field. Static fields have a ConstantValue attribute.

See Also:

ConstantValue

Constructor Summary

Constructors

Constructor and Description
Field(java.io.DataInputStream in, ClassInfo classInfo) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
int	constantValue() Get the index into the constant pool of the field's constant value, if any.
ClassInfo	declaringClass() Get the class which declared the field.
int	modifiers() Get the modifiers of the field.
int	nameIndex() Get the index into the constant pool of the name of the field.
void	setConstantValue(int index) Set the index into the constant pool of the field's constant value.
void	setModifiers(int modifiers) Set the modifiers of the field.
void	setNameIndex(int name) Set the index into the constant pool of the name of the field.
void	setTypeIndex(int type) Set the index into the constant pool of the type of the field.
java.lang.String	toString() Convert the field to a string.
int	typeIndex() Get the index into the constant pool of the type of the field.
void	write(java.io.DataOutputStream out) Write the field to a class file.

Methods inherited from class java.lang.Object

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

Constructor Detail

Field

public Field(java.io.DataInputStream in,
     ClassInfo classInfo)
      throws java.io.IOException

Constructor. Read a field from a class file.

Parameters:

in - The data stream of the class file.

classInfo - The class file containing the field.

Throws:

java.io.IOException - If an error occurs while reading.

Method Detail

declaringClass

public ClassInfo declaringClass()

Get the class which declared the field.

Specified by:

declaringClass in interface FieldInfo

Returns:

The ClassInfo of the class which declared the field.

setNameIndex

public void setNameIndex(int name)

Set the index into the constant pool of the name of the field.

Specified by:

setNameIndex in interface FieldInfo

Parameters:

name - The name of the field.

setTypeIndex

public void setTypeIndex(int type)

Set the index into the constant pool of the type of the field.

Specified by:

setTypeIndex in interface FieldInfo

Parameters:

type - The type of the field.

nameIndex

public int nameIndex()

Get the index into the constant pool of the name of the field.

Specified by:

nameIndex in interface FieldInfo

Returns:

The index into the constant pool of the name of the field.

typeIndex

public int typeIndex()

Get the index into the constant pool of the type of the field.

Specified by:

typeIndex in interface FieldInfo

Returns:

The index into the constant pool of the type of the field.

setModifiers

public void setModifiers(int modifiers)

Set the modifiers of the field. The values correspond to the constants in the Modifiers class.

Specified by:

setModifiers in interface FieldInfo

Parameters:

modifiers - A bit vector of modifier flags for the field.

See Also:

Modifiers

modifiers

public int modifiers()

Get the modifiers of the field. The values correspond to the constants in the Modifiers class.

Specified by:

modifiers in interface FieldInfo

Returns:

A bit vector of modifier flags for the field.

See Also:

Modifiers

constantValue

public int constantValue()

Get the index into the constant pool of the field's constant value, if any. Returns 0 if the field does not have a constant value.

Specified by:

constantValue in interface FieldInfo

See Also:

ClassInfo.constants()

setConstantValue

public void setConstantValue(int index)

Set the index into the constant pool of the field's constant value.

Specified by:

setConstantValue in interface FieldInfo

See Also:

ClassInfo.constants()

write

public void write(java.io.DataOutputStream out)
           throws java.io.IOException

Write the field to a class file.

Parameters:

out - The data stream of the class file.

Throws:

java.io.IOException - If an error occurs while writing.

toString

public java.lang.String toString()

Convert the field to a string.

Overrides:

toString in class java.lang.Object

Returns:

A string representation of the field.