SourceNodeAnalysis

java.lang.Object
- ptolemy.graph.analysis.Analysis
- - ptolemy.graph.analysis.SourceNodeAnalysis

```
public class SourceNodeAnalysis
extends Analysis
```
Computation of source nodes in a graph. A source node in a graph is a node without input edges.
The returned collection cannot be modified when the client uses the default analyzer.

Since:

Ptolemy II 2.0

Version:

$Id$

Author:

Shahrooz Shahparnia

Pt.AcceptedRating:

Red (ssb)

Pt.ProposedRating:

Red (shahrooz)

Constructor Summary

Constructors
Constructor	Description
`SourceNodeAnalysis(SourceNodeAnalyzer analyzer)`	Construct an instance of this class using a given analyzer.
`SourceNodeAnalysis(Graph graph)`	Construct an instance of this class for a given graph.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.util.List`	`nodes()`	Return the source nodes in the graph under analysis.
`java.lang.String`	`toString()`	Return a description of the analysis and the associated analyzer.
`boolean`	`validAnalyzerInterface(Analyzer analyzer)`	Check if a given analyzer is compatible with this analysis.

Methods inherited from class ptolemy.graph.analysis.Analysis
analyzer, changeAnalyzer, graph, valid

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

- Constructor Detail
  - SourceNodeAnalysis
```
public SourceNodeAnalysis(Graph graph)
```
    Construct an instance of this class for a given graph.
    
    Parameters:
    
    graph - The given graph.
  - SourceNodeAnalysis
```
public SourceNodeAnalysis(SourceNodeAnalyzer analyzer)
```
    Construct an instance of this class using a given analyzer.
    
    Parameters:
    
    analyzer - The given analyzer.
- Method Detail
  - nodes
```
public java.util.List nodes()
```
    Return the source nodes in the graph under analysis. Each element of the collection is an Node.
    
    Returns:
    
    Return the source nodes.
  - toString
```
public java.lang.String toString()
```
    Return a description of the analysis and the associated analyzer.
    
    Overrides:
    
    toString in class Analysis
    
    Returns:
    
    A description of the analysis and the associated analyzer.
  - validAnalyzerInterface
```
public boolean validAnalyzerInterface(Analyzer analyzer)
```
    Check if a given analyzer is compatible with this analysis. In other words if it is possible to use it to compute the computation associated with this analysis.
    
    Overrides:
    
    validAnalyzerInterface in class Analysis
    
    Parameters:
    
    analyzer - The given analyzer.
    
    Returns:
    
    True if the given analyzer is valid for this analysis.