Package org.teiid.query.processor.proc

Class WhileInstruction

java.lang.Object

org.teiid.query.processor.proc.ProgramInstruction

org.teiid.query.processor.proc.WhileInstruction

All Implemented Interfaces:

Cloneable, RepeatedInstruction, Statement.Labeled

public class WhileInstruction
extends ProgramInstruction
implements RepeatedInstruction

Constructor Summary

Constructors

Constructor	Description
WhileInstruction(Program program, Criteria condition, String label)

Method Summary

Modifier and Type	Method	Description
WhileInstruction	clone()	Returns a deep clone
PlanNode	getDescriptionProperties()
String	getLabel()
Program	getNestedProgram()
Program	getWhileProgram()
void	postInstruction(ProcedurePlan procEnv)
void	process(ProcedurePlan env)	Allow this instruction to do whatever processing it needs, and to in turn manipulate the running program.
Boolean	requiresTransaction(boolean transactionalReads)
void	setLabel(String label)
boolean	testCondition(ProcedurePlan procEnv)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

WhileInstruction

public WhileInstruction(Program program,
                        Criteria condition,
                        String label)

Method Detail

getLabel

public String getLabel()

Specified by:

getLabel in interface Statement.Labeled

setLabel

public void setLabel(String label)

Specified by:

setLabel in interface Statement.Labeled

process

public void process(ProcedurePlan env)
             throws TeiidComponentException

Description copied from class: ProgramInstruction

Allow this instruction to do whatever processing it needs, and to in turn manipulate the running program. A typical instruction should simply increment the program counter of the current program, but specialized instructions may add sub programs to the stack or not increment the counter (so that they are executed again.)

Specified by:

process in class ProgramInstruction

Throws:

TeiidComponentException

getWhileProgram

public Program getWhileProgram()

clone

public WhileInstruction clone()

Returns a deep clone

Overrides:

clone in class ProgramInstruction

Returns:

shallow clone

toString

public String toString()

Overrides:

toString in class Object

getDescriptionProperties

public PlanNode getDescriptionProperties()

Specified by:

getDescriptionProperties in class ProgramInstruction

testCondition

public boolean testCondition(ProcedurePlan procEnv)
                      throws TeiidComponentException,
                             TeiidProcessingException

Specified by:

testCondition in interface RepeatedInstruction

Throws:

TeiidProcessingException

TeiidComponentException

getNestedProgram

public Program getNestedProgram()

Specified by:

getNestedProgram in interface RepeatedInstruction

See Also:

RepeatedInstruction.getNestedProgram()

postInstruction

public void postInstruction(ProcedurePlan procEnv)
                     throws TeiidComponentException

Specified by:

postInstruction in interface RepeatedInstruction

Throws:

TeiidComponentException

requiresTransaction

public Boolean requiresTransaction(boolean transactionalReads)

Overrides:

requiresTransaction in class ProgramInstruction