com.ibm.wala.shrikeCT
Class AttributeReader

java.lang.Object
  com.ibm.wala.shrikeCT.AttributeReader

Direct Known Subclasses:

CodeReader, ConstantValueReader, ExceptionsReader, InnerClassesReader, LineNumberTableReader, LocalVariableTableReader, RuntimeInvisibleAnnotationsReader, SignatureReader, SourceDebugExtensionReader, SourceFileReader

public abstract class AttributeReader
extends java.lang.Object

This is a base class for "attribute readers", the classes which provide access to the contents of attributes.

Field Summary

protected int	attr
protected ClassReader	cr
protected int	length

Constructor Summary

protected

AttributeReader(ClassReader.AttrIterator attr, java.lang.String expectedName) Construct a reader for a particular attribute.

Method Summary

protected void	checkSize(int offset, int len) Ensure that the len bytes starting at offset fall within the attribute data.
protected void	checkSizeEquals(int offset, int len) Ensure that the len bytes starting at offset end at the end of the attribute data.
ClassReader	getClassReader()
int	getRawOffset()
int	getRawSize()

Methods inherited from class java.lang.Object

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

Field Detail

cr

protected final ClassReader cr

attr

protected final int attr

length

protected final int length

Constructor Detail

AttributeReader

protected AttributeReader(ClassReader.AttrIterator attr,
                          java.lang.String expectedName)
                   throws InvalidClassFileException

Construct a reader for a particular attribute.

Parameters:

attr - a valid attribute iterator pointing at the attribute to read

expectedName - the name the attribute must have

Throws:

InvalidClassFileException

Method Detail

getClassReader

public final ClassReader getClassReader()

Returns:

the class reader the attribute belongs to

getRawOffset

public final int getRawOffset()

Returns:

the offset of the raw attribute data (including the attribute header)

getRawSize

public final int getRawSize()

Returns:

the size of the raw attribute data (including the attribute header)

checkSize

protected final void checkSize(int offset,
                               int len)
                        throws InvalidClassFileException

Ensure that the len bytes starting at offset fall within the attribute data.

Throws:

InvalidClassFileException - if the bytes fall outside the data

checkSizeEquals

protected final void checkSizeEquals(int offset,
                                     int len)
                              throws InvalidClassFileException

Ensure that the len bytes starting at offset end at the end of the attribute data.

Throws:

InvalidClassFileException - if the bytes do not end at the end of the attribute