com.joanju.cg.bytecode
Class TriggerblockInstr

java.lang.Object
  com.joanju.cg.bytecode.Bytecode
      com.joanju.cg.bytecode.TriggerblockInstr

public class TriggerblockInstr
extends Bytecode

Represents an ON trigger block in the source code.

As of current writing (Nov.2007) there is no implementation of procedural calls to triggers (ex: APPLY), though it's possible it could be done in some limited fashion.

In terms of working with trigger blocks though, they are interesting to us because they frequently themselves contain calls, and we want to know what is the containing procedure of the trigger block. In the bytecode implementation, trigger blocks are treated similarly to procedure blocks, so we can't see from the bytecode order what the containing procedure is for a trigger block, so that information is added as an additional field.

Field Summary

Fields inherited from class com.joanju.cg.bytecode.Bytecode

address, cuid, instrSet, nodeNum, xrefs

Constructor Summary

TriggerblockInstr()

TriggerblockInstr(int cuid, int address)

Method Summary

void	calcValueSets() Calculate the value sets for the instruction.
int	getContainingProcedureAddress() A trigger might be in the outer/external procedure block, or in a sub-procedure of any sort.
Opcode	getOpcode()
void	setContainingProcedureAddress(int addr) This value is assigned by the compiler.
protected void	setValuesFromByteStream(java.io.DataInputStream in)
java.lang.String	toStringFromData() containingProcedureAddress.
protected void	writeValuesToByteStream(java.io.DataOutputStream out)

Methods inherited from class com.joanju.cg.bytecode.Bytecode

addSource, addWhereUsed, beforeWrite, calcValuesAgain, compareTo, equals, fetchBytesFromDB, fetchInCu, generateDataForDB, getAddress, getCuID, getNodeNum, getSources, getValues, getValuesCalcLocal, getWhereUsed, getXrefs, hashCode, initData, isDataModified, isFromDB, setAddress, setCuID, setDataBytesFromDB, setDataModified, setFromDB, setInstructionSet, setNodeNum, shouldLoadData, sourcesForXrefTarget, storeIfModified, toString, toStringFromComments, toStringFromName, toStringFromSet

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

TriggerblockInstr

public TriggerblockInstr()

TriggerblockInstr

public TriggerblockInstr(int cuid,
                         int address)

Method Detail

calcValueSets

public void calcValueSets()
                   throws java.sql.SQLException,
                          java.io.IOException

Description copied from class: Bytecode

Calculate the value sets for the instruction.

Called during build, build-recalc, checkvals, and checkvals-recalc. Implementations should only build from external values once. Calculates which xref records are needed as well.

IMPORTANT: Should only ever be called for instructions belonging to an InstructionSet.

Specified by:

calcValueSets in class Bytecode

Throws:

java.sql.SQLException

java.io.IOException

getContainingProcedureAddress

public int getContainingProcedureAddress()

A trigger might be in the outer/external procedure block, or in a sub-procedure of any sort. We don't (currently) keep track of whether a trigger block is nested in another trigger block.

getOpcode

public Opcode getOpcode()

Specified by:

getOpcode in class Bytecode

setContainingProcedureAddress

public void setContainingProcedureAddress(int addr)

This value is assigned by the compiler.

setValuesFromByteStream

protected void setValuesFromByteStream(java.io.DataInputStream in)
                                throws java.io.IOException

Specified by:

setValuesFromByteStream in class Bytecode

Throws:

java.io.IOException

toStringFromData

public java.lang.String toStringFromData()

containingProcedureAddress.

Overrides:

toStringFromData in class Bytecode

Returns:

"" if not overridden.

writeValuesToByteStream

protected void writeValuesToByteStream(java.io.DataOutputStream out)
                                throws java.io.IOException

Specified by:

writeValuesToByteStream in class Bytecode

Throws:

java.io.IOException