Dag (Apache SystemDS 3.0.0 API)

java.lang.Object
- org.apache.sysds.lops.compile.Dag<N>

Type Parameters:

N - the class parameter has no affect and is only kept for documentation purposes.
```
public class Dag<N extends Lop>
extends Object
```
Class to maintain a DAG of lops and compile it into runtime instructions, incl piggybacking into jobs.

Constructor Summary

Constructors
Constructor Description

Dag()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`addNode(Lop node)`	Method to add a node to the DAG.
`ArrayList<Instruction>`	`getJobs(StatementBlock sb, DMLConfig config)`	Method to compile a dag generically
`String`	`getNextUniqueFilename()`
`static String`	`getNextUniqueFilenameSuffix()`
`static String`	`getNextUniqueVarname(Types.DataType dt)`

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

Constructor Detail
- Dag
```
public Dag()
```

Method Detail

getNextUniqueFilenameSuffix

public static String getNextUniqueFilenameSuffix()

getNextUniqueFilename
```
public String getNextUniqueFilename()
```

getNextUniqueVarname

public static String getNextUniqueVarname(Types.DataType dt)

addNode
```
public boolean addNode(Lop node)
```
Method to add a node to the DAG.

Parameters:

node - low-level operator

Returns:

true if node was not already present, false if not.

getJobs

public ArrayList<Instruction> getJobs(StatementBlock sb,
                                      DMLConfig config)

Method to compile a dag generically

Parameters:: sb - statement block; config - dml configuration
Returns:: list of instructions