com.techtrader.modules.tools.bytecode
Class ConstantValueAttribute

java.lang.Object
  |
  +--com.techtrader.modules.tools.bytecode.BCEntity
        |
        +--com.techtrader.modules.tools.bytecode.Attribute
              |
              +--com.techtrader.modules.tools.bytecode.ConstantValueAttribute

public class ConstantValueAttribute

extends Attribute

Representation of a constant value in a .class file.

Author:

Abe White

Fields inherited from class com.techtrader.modules.tools.bytecode.Attribute

_nameIndex, _owner

Constructor Summary

ConstantValueAttribute(int nameIndex, BCEntity owner)
Protected constructor.

Method Summary

void	acceptVisit(BCVisitor visit) Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this object.
protected void	copy(Attribute other) Copy the information from the given attribute to this one.
double	getDoubleValue() Get the value of this double constant.
float	getFloatValue() Get the value of this float constant.
int	getIntValue() Get the value of this int constant.
int	getLength() Return the length of the .class representation of this attribute, in bytes.
long	getLongValue() Get the value of this long constant.
String	getStringValue() Get the value of this String constant.
Class	getType() Return the type of constant this attribute represents, or null if the constant has not been set.
String	getTypeName() Return the type of constant this attribute represents, or null if the constant has not been set.
Object	getValue() Return the value of this constant as an Object of the appropriate type (String, Integer, Double, etc).
int	getValueIndex() Get the index in the constnat pool of the Entry describeing this constant; this might be a StringEntry, IntEntry, DoubleEntry, etc.
protected void	readData(DataInput in, int length) Should be overridden by subclasses to read their internal data from the given stream, up to length bytes, excluding the name index.
void	setDoubleValue(double value) Set the value of this double constant.
void	setFloatValue(float value) Set the value of this float constant.
void	setIntValue(int value) Set the value of this int constant.
void	setLongValue(long value) Set the value of this long constant.
void	setStringValue(String value) Set the value of this String constant.
void	setValue(Object value) Set the value of this constant using the appropriate wrapper Object type (String, Integer, Double, etc).
void	setValueIndex(int valueIndex) Set the index in the constnat pool of the Entry describing this constant; this might be a StringEntry, IntEntry, DoubleEntry, etc.
protected void	writeData(DataOutput out, int length) Should be overridden by subclasses to write their internal data to the given stream, up to length bytes, excluding the name index.

Methods inherited from class com.techtrader.modules.tools.bytecode.Attribute

createAttribute, getName, getNameIndex, getOwner, getPool, invalidate

Methods inherited from class com.techtrader.modules.tools.bytecode.BCEntity

addAttribute, clearAttributes, getAttribute, getAttributes, getAttributes, importAttribute, importAttributes, readAttributes, removeAttribute, removeAttribute, visitAttributes, writeAttributes

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantValueAttribute

public ConstantValueAttribute(int nameIndex,
                              BCEntity owner)

Protected constructor.

Method Detail

getValueIndex

public int getValueIndex()

Get the index in the constnat pool of the Entry describeing this constant; this might be a StringEntry, IntEntry, DoubleEntry, etc.

setValueIndex

public void setValueIndex(int valueIndex)

Set the index in the constnat pool of the Entry describing this constant; this might be a StringEntry, IntEntry, DoubleEntry, etc.

getType

public Class getType()

Return the type of constant this attribute represents, or null if the constant has not been set.

getTypeName

public String getTypeName()

Return the type of constant this attribute represents, or null if the constant has not been set.

getValue

public Object getValue()

Return the value of this constant as an Object of the appropriate type (String, Integer, Double, etc).

setValue

public void setValue(Object value)

Set the value of this constant using the appropriate wrapper Object type (String, Integer, Double, etc). It is an error to change the type of a constant once it has been set.

getIntValue

public int getIntValue()

Get the value of this int constant.

setIntValue

public void setIntValue(int value)

Set the value of this int constant.

getFloatValue

public float getFloatValue()

Get the value of this float constant.

setFloatValue

public void setFloatValue(float value)

Set the value of this float constant.

getDoubleValue

public double getDoubleValue()

Get the value of this double constant.

setDoubleValue

public void setDoubleValue(double value)

Set the value of this double constant.

getLongValue

public long getLongValue()

Get the value of this long constant.

setLongValue

public void setLongValue(long value)

Set the value of this long constant.

getStringValue

public String getStringValue()

Get the value of this String constant.

setStringValue

public void setStringValue(String value)

Set the value of this String constant.

getLength

public int getLength()

Description copied from class: Attribute

Return the length of the .class representation of this attribute, in bytes.

Overrides:

getLength in class Attribute

copy

protected void copy(Attribute other)

Description copied from class: Attribute

Copy the information from the given attribute to this one.

Overrides:

copy in class Attribute

readData

protected void readData(DataInput in,
                        int length)
                 throws IOException

Description copied from class: Attribute

Should be overridden by subclasses to read their internal data from the given stream, up to length bytes, excluding the name index.

Overrides:

readData in class Attribute

writeData

protected void writeData(DataOutput out,
                         int length)
                  throws IOException

Description copied from class: Attribute

Should be overridden by subclasses to write their internal data to the given stream, up to length bytes, excluding the name index.

Overrides:

writeData in class Attribute

acceptVisit

public void acceptVisit(BCVisitor visit)

Description copied from interface: VisitAcceptor

Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this object.