Package org.apache.commons.compress.harmony.unpack200.bytecode

Class BCIRenumberedAttribute

java.lang.Object

org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry

org.apache.commons.compress.harmony.unpack200.bytecode.Attribute

org.apache.commons.compress.harmony.unpack200.bytecode.BCIRenumberedAttribute

Direct Known Subclasses:

CodeAttribute, LineNumberTableAttribute, LocalVariableTableAttribute, LocalVariableTypeTableAttribute, NewAttribute

public abstract class BCIRenumberedAttribute
extends Attribute

Abstract superclass for attributes that have some part encoded with a BCI renumbering

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	renumbered

Fields inherited from class org.apache.commons.compress.harmony.unpack200.bytecode.Attribute

attributeName

Fields inherited from class org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry

NONE

Constructor Summary

Constructors

Constructor	Description
BCIRenumberedAttribute(CPUTF8 attributeName)

Method Summary

Modifier and Type	Method	Description
protected abstract int	getLength()
protected abstract int[]	getStartPCs()
boolean	hasBCIRenumbering()	Answer true if the receiver needs to have BCI renumbering applied to it; otherwise answer false.
void	renumber(List<Integer> byteCodeOffsets)	In Pack200, line number tables are BCI renumbered.
abstract String	toString()
protected abstract void	writeBody(DataOutputStream dos)

Methods inherited from class org.apache.commons.compress.harmony.unpack200.bytecode.Attribute

doWrite, equals, getAttributeName, getLengthIncludingHeader, getNestedClassFileEntries, hashCode, isSourceFileAttribute, resolve

Methods inherited from class org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry

objectHashCode, write

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

renumbered

protected boolean renumbered

Constructor Details

BCIRenumberedAttribute

public BCIRenumberedAttribute(CPUTF8 attributeName)

Method Details

getLength

protected abstract int getLength()

Specified by:

getLength in class Attribute

getStartPCs

protected abstract int[] getStartPCs()

hasBCIRenumbering

public boolean hasBCIRenumbering()

Description copied from class: Attribute

Answer true if the receiver needs to have BCI renumbering applied to it; otherwise answer false.

Overrides:

hasBCIRenumbering in class Attribute

Returns:

boolean BCI renumbering required

renumber

public void renumber(List<Integer> byteCodeOffsets)
              throws Pack200Exception

In Pack200, line number tables are BCI renumbered. This method takes the byteCodeOffsets (which is a List of Integers specifying the offset in the byte code array of each instruction) and updates the start_pcs so that it points to the instruction index itself, not the BCI renumbering of the instruction.

Parameters:

byteCodeOffsets - List of Integer offsets of the byte code array

Throws:

Pack200Exception - Thrown from a subclass.

toString

public abstract String toString()

Specified by:

toString in class ClassFileEntry

writeBody

protected abstract void writeBody(DataOutputStream dos)
                           throws IOException

Specified by:

writeBody in class Attribute

Throws:

IOException