de.projectory.koivima.core
Class CodeBlock

java.lang.Object
  de.projectory.koivima.core.Element
      de.projectory.koivima.core.AbstractElementList
          de.projectory.koivima.core.CodeBlock

All Implemented Interfaces:

java.lang.Iterable<Element>

public class CodeBlock
extends AbstractElementList

An executable piece of a program consisting of elements.

Field Summary

(package private) int	codePointer pointer to the current element to execute
(package private) boolean	codePointerIsClean set to false if the code pointer has been changed from the outside
(package private) ExecutionContext	localContext Execution context for the elements of this CodeBlock

Fields inherited from class de.projectory.koivima.core.AbstractElementList

code

Fields inherited from class de.projectory.koivima.core.Element

context

Constructor Summary

CodeBlock()

Method Summary

void	add(Element element) Adds an element to the end of this code block.
void	addFirst(Element element) Adds an element to the beginning of this list.
void	evaluate() Evaluates this whole code block
void	moveCodePointer(int offset) Moves the code pointer.
void	onError(java.lang.String message) Called if an error ocurs.
Element	removeFirst() Removes the first element of executable code.
void	setExecutionContext(ExecutionContext context) Overwrites setExecutionContext of AbstractElementList
java.lang.String	toString() Returns a String representation of this code block.

Methods inherited from class de.projectory.koivima.core.AbstractElementList

execute, iterator

Methods inherited from class de.projectory.koivima.core.Element

getExecutionContext

Methods inherited from class java.lang.Object

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

Field Detail

codePointer

int codePointer

pointer to the current element to execute

codePointerIsClean

boolean codePointerIsClean

set to false if the code pointer has been changed from the outside

localContext

ExecutionContext localContext

Execution context for the elements of this CodeBlock

Constructor Detail

CodeBlock

public CodeBlock()

Method Detail

setExecutionContext

public void setExecutionContext(ExecutionContext context)

Overwrites setExecutionContext of AbstractElementList

Overrides:

setExecutionContext in class AbstractElementList

Parameters:

context - ExecutionContext for this CodeBlock.

add

public void add(Element element)

Adds an element to the end of this code block.

Specified by:

add in class AbstractElementList

Parameters:

element - A code element: data element, operator or other

addFirst

public void addFirst(Element element)

Adds an element to the beginning of this list.

Specified by:

addFirst in class AbstractElementList

Parameters:

element - A code element: data element, operator or other

removeFirst

public Element removeFirst()

Removes the first element of executable code.

Returns:

First element of the code.

evaluate

public void evaluate()

Evaluates this whole code block

moveCodePointer

public void moveCodePointer(int offset)

Moves the code pointer. Needed to implement moves, ifs and so on.

Parameters:

offset - Steps to move the code pointer.

onError

public void onError(java.lang.String message)

Called if an error ocurs. At the moment it just prints out an error message

toString

public java.lang.String toString()

Returns a String representation of this code block.

Overrides:

toString in class java.lang.Object