ControlFlow.Block (Javassist API)

java.lang.Object
- javassist.bytecode.stackmap.BasicBlock
- - javassist.bytecode.analysis.ControlFlow.Block

Enclosing class:

ControlFlow
```
public static class ControlFlow.Block
extends javassist.bytecode.stackmap.BasicBlock
```
Basic block. It is a sequence of contiguous instructions that do not contain jump/branch instructions except the last one. Since Java6 or later does not allow JSR, we deal with JSR as a non-branch instruction.

Nested Class Summary
- Nested classes/interfaces inherited from class javassist.bytecode.stackmap.BasicBlock
  javassist.bytecode.stackmap.BasicBlock.Catch, javassist.bytecode.stackmap.BasicBlock.Maker

Field Summary

Fields
Modifier and Type Field Description

java.lang.Object clientData
A field that can be freely used for storing extra data.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`ControlFlow.Catcher[]`	`catchers()`	Returns catch clauses that will catch an exception thrown in this block.
`ControlFlow.Block`	`exit(int n)`	Returns the n-th block that may be executed after this block.
`int`	`exits()`	Return the number of the blocks that may be executed after this block.
`ControlFlow.Block`	`incoming(int n)`	Returns the block that the control may jump into this block from.
`int`	`incomings()`	Returns the number of the control paths entering this block.
`int`	`index()`	Returns the position of this block in the array of basic blocks that the `basicBlocks` method returns.
`int`	`length()`	Returns the length of this block.
`int`	`position()`	Returns the position of the first instruction in this block.

Methods inherited from class javassist.bytecode.stackmap.BasicBlock
find, toString

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - clientData
```
public java.lang.Object clientData
```
    A field that can be freely used for storing extra data. A client program of this control-flow analyzer can append an additional attribute to a Block object. The Javassist library never accesses this field.
- Method Detail
  - index
```
public int index()
```
    Returns the position of this block in the array of basic blocks that the basicBlocks method returns.
    
    See Also:
    
    ControlFlow.basicBlocks()
  - position
```
public int position()
```
    Returns the position of the first instruction in this block.
  - length
```
public int length()
```
    Returns the length of this block.
  - incomings
```
public int incomings()
```
    Returns the number of the control paths entering this block.
  - incoming
```
public ControlFlow.Block incoming(int n)
```
    Returns the block that the control may jump into this block from.
  - exits
```
public int exits()
```
    Return the number of the blocks that may be executed after this block.
  - exit
```
public ControlFlow.Block exit(int n)
```
    Returns the n-th block that may be executed after this block.
    
    Parameters:
    
    n - an index in the array of exit blocks.
  - catchers
```
public ControlFlow.Catcher[] catchers()
```
    Returns catch clauses that will catch an exception thrown in this block.