jasm.attributes

Class StackMapTable

java.lang.Object

jasm.attributes.StackMapTable

All Implemented Interfaces:

BytecodeAttribute

public class StackMapTable
extends Object
implements BytecodeAttribute

Consists of zero or more stack map frames. Each stack map frame specifies (either explicitly or implicitly) a bytecode offset, the verification types for the local variables, and the verification types for the operand stack.

Author:

David J. Pearce

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	StackMapTable.Frame Represents a full stack frame.

Nested classes/interfaces inherited from interface jasm.lang.BytecodeAttribute

BytecodeAttribute.Fn, BytecodeAttribute.Reader, BytecodeAttribute.Unknown

Constructor Summary

Constructors

Constructor and Description
StackMapTable(StackMapTable.Frame[] frames)

Method Summary

Modifier and Type	Method and Description
void	addPoolItems(Set<Constant.Info> constantPool) When this method is called, the attribute must add all items that it needs to the constant pool.
StackMapTable.Frame	frameAt(int index) Returns the stack frame at the given bytecode index.
String	name()
void	print(PrintWriter output, Map<Constant.Info,Integer> constantPool) This method is used to print the contents of the attribute in human-readable form, similar to that produced by "javap".
void	write(BinaryOutputStream writer, Map<Constant.Info,Integer> constantPool) This method requires the attribute to write itself to the binary stream.

Methods inherited from class java.lang.Object

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

Constructor Detail

StackMapTable

public StackMapTable(StackMapTable.Frame[] frames)

Method Detail

name

public String name()

Specified by:

name in interface BytecodeAttribute

write

public void write(BinaryOutputStream writer,
                  Map<Constant.Info,Integer> constantPool)
           throws IOException

Description copied from interface: BytecodeAttribute

This method requires the attribute to write itself to the binary stream.

Specified by:

write in interface BytecodeAttribute

Parameters:

writer - Outputstream to which the attribute should be written.

constantPool - Map of CONSTANT_info items to their index in the constant pool.

Throws:

IOException

addPoolItems

public void addPoolItems(Set<Constant.Info> constantPool)

Description copied from interface: BytecodeAttribute

When this method is called, the attribute must add all items that it needs to the constant pool.

Specified by:

addPoolItems in interface BytecodeAttribute

print

public void print(PrintWriter output,
                  Map<Constant.Info,Integer> constantPool)
           throws IOException

Description copied from interface: BytecodeAttribute

This method is used to print the contents of the attribute in human-readable form, similar to that produced by "javap".

Specified by:

print in interface BytecodeAttribute

Parameters:

output - Output writer to which the attribute is printed.

constantPool - Map of CONSTANT_info items to their index in the constant pool.

Throws:

IOException

frameAt

public StackMapTable.Frame frameAt(int index)

Returns the stack frame at the given bytecode index. Observe that this is not the bytecode offset; rather, it's the index into the array returned by Code.bytecodes.

Parameters:

index -

Returns: