javassist.bytecode

Class CodeAttribute

public class CodeAttribute extends AttributeInfo implements Opcode

Code_attribute.

To browse the code field of a Code_attribute structure, use CodeIterator.

Nested Class Summary
static class	CodeAttribute.RuntimeCopyException An exception that may be thrown by `copy()` in `CodeAttribute`.

Field Summary
static String	tag The name of this attribute `"Code"`.

Constructor Summary
	CodeAttribute(ConstPool cp, int stack, int locals, byte[] code, ExceptionTable etable) Constructs a `Code_attribute`.

Method Summary
int	computeMaxStack() Computes the maximum stack size and sets `max_stack` to the computed size.
AttributeInfo	copy(ConstPool newCp, Map classnames) Makes a copy.
byte[]	get() This method is not available.
AttributeInfo	getAttribute(String name) Returns the attribute with the specified name.
List	getAttributes() Returns `attributes[]`.
byte[]	getCode() Returns `code[]`.
int	getCodeLength() Returns `code_length`.
String	getDeclaringClass() Returns the name of the class declaring the method including this code attribute.
ExceptionTable	getExceptionTable() Returns `exception_table[]`.
int	getMaxLocals() Returns `max_locals`.
int	getMaxStack() Returns `max_stack`.
CodeIterator	iterator() Makes a new iterator for reading this code attribute.
int	length() Returns the length of this `attribute_info` structure.
void	set(byte[] newinfo) This method is not available.
void	setMaxLocals(int value) Sets `max_locals`.
void	setMaxStack(int value) Sets `max_stack`.

Field Detail

tag

public static final String tag

The name of this attribute "Code".

Constructor Detail

CodeAttribute

public CodeAttribute(ConstPool cp, int stack, int locals, byte[] code, ExceptionTable etable)

Constructs a Code_attribute.

Parameters: cp constant pool table stack max_stack locals max_locals code code[] etable exception_table[]

Method Detail

computeMaxStack

public int computeMaxStack()

Computes the maximum stack size and sets max_stack to the computed size.

Returns: the newly computed value of max_stack

Throws: BadBytecode if this method fails in computing.

copy

public AttributeInfo copy(ConstPool newCp, Map classnames)

Makes a copy. Class names are replaced according to the given Map object.

Parameters: newCp the constant pool table used by the new copy. classnames pairs of replaced and substituted class names.

Returns: CodeAttribute object.

Throws: RuntimeCopyException if a BadBytecode exception is thrown, it is converted into RuntimeCopyException.

get

public byte[] get()

This method is not available.

Throws: java.lang.UnsupportedOperationException always thrown.

getAttribute

public AttributeInfo getAttribute(String name)

Returns the attribute with the specified name. If it is not found, this method returns null.

Parameters: name attribute name

Returns: an AttributeInfo object or null.

getAttributes

public List getAttributes()

Returns attributes[]. It returns a list of AttributeInfo. A new element can be added to the returned list and an existing element can be removed from the list.