Latest revision as of 06:42, 18 February 2019

SimpleGraph FileSystem module

The SimpleGraph FileSystem module makes your FileSystem accessible via the Java FileSystem API see java.io.File. The initial issue is 2

Sources

System: FileSystem.java
JUnit-Test: TestFileSystem.java

Description

A Filesystem is a tree which is simple form of a graph. It consists of File and Directory nodes.

There is parent-child relation between Directories and their subfiles. A Directory may contain files and directories. A file is always leaf of the the tree. A directory may be a leaf if it's empty. In our example we'll go from directories to the containing elements via the "files" edge/relation and from the files/directories to their parents via the "parent" edge.

Example

Goal

We'd like to analyze some part of a filesystem and we'll use the "src" directory of the SimpleGraph project's source code as a starting point.

Result

The graph below shows the source code structure for the SimpleGraph project with the root of the tree being the "src" directory. The nodes are clickable and will lead you to the corresponding file representation on github.

Example FileSystem Graph of "src" directory

The nodes of this graph are clickable and will lead you to the source pages in the github repository of this project.

explanation

creating the graph

This graph visualization has been produced with the following Java lines which make sure that the "src" Directory can be handled as a gremlin graph:

 // create a new FileSystem access supplying the result as a SimpleSystem API
 SimpleSystem fs=new FileSystem();  
 // connect to this system with no extra information (e.g. no credentials) and move to the "src" node 
 SimpleNode start = fs.connect("").moveTo("src");
 // do gremlin style out traversals recusively to any depth 
 start.recursiveOut("files",Integer.MAX_VALUE);

converting the graph to graphviz

The graph is now available and can be traversed to create a graphviz version of it. We use the Rythm template engine to do so. Within Rythm you can use Java code. Basically we try out the code in the TestRythm JUnit test and then use it in the Rythm template graphvizTree.rythm

Module for SE: true

@@ Line 1: / Line 1: @@
 {{SimpleGraphModule
 |name=FileSystem
-|documentation=your FileSystem accessible via the Java FileSystem API
+|logo=File:Folder.svg
+|modulename=filesystem
+|systemname=FileSystem
+|url=https://en.wikipedia.org/wiki/File_system
+|apiname=java.io.File
+|apiurl=https://docs.oracle.com/javase/8/docs/api/java/io/File.html
+|issue=2
+|documentation=makes your FileSystem accessible via the Java FileSystem API
 |storemode=property
 |viewmode=hidden
@@ Line 79: / Line 86: @@
 "src" Directory can be handled as a gremlin graph:
 <source lang='java'>
-  // create a new FileSystem acces supplying the result as a SimpleSystem API
+  // create a new FileSystem access supplying the result as a SimpleSystem API
   SimpleSystem fs=new FileSystem();
   // connect to this system with no extra information (e.g. no credentials) and move to the "src" node
@@ Line 86: / Line 93: @@
   start.recursiveOut("files",Integer.MAX_VALUE);
 </source>
 ==== converting the graph to graphviz ====
 The graph is now available and can be traversed to create a graphviz version of it. We use
@@ Line 91: / Line 99: @@
 Basically we try out the code in the
 [https://github.com/BITPlan/com.bitplan.simplegraph/blob/master/simplegraph-filesystem/src/test/java/com/bitplan/simplegraph/filesystem/TestRythm.java TestRythm JUnit test] and then use it in the Rythm template
-[https://github.com/BITPlan/com.bitplan.simplegraph/blob/master/simplegraph-filesystem/src/main/rythm/graphvizTree.rythm graphvizTree.rythm]
+[https://github.com/BITPlan/com.bitplan.simplegraph/blob/master/simplegraph-core/src/main/resources/com/bitplan/rythm/graphvizTree.rythm graphvizTree.rythm]
 [[Category:frontend]]
 [[Category:SimpleGraph]]
+Module for SE: [[Module for SE::true]]

Difference between revisions of "SimpleGraph-FileSystem"