GraphReader


1   package prefuse.data.io;
2   
3   import java.io.File  ;
4   import java.io.FileNotFoundException  ;
5   import java.io.IOException  ;
6   import java.io.InputStream  ;
7   import java.net.URL  ;
8   
9   import prefuse.data.Graph;
10  
11  /**
12   * nterface for classes that read in Graph or Tree data from a particular
13   * file format.
14   * 
15   * @author <a HREF="http://jheer.org">jeffrey heer</a>
16   */
17  public interface GraphReader {
18  
19      /**
20       * Read in a graph from the file at the given location. Though
21       * not required by this interface, the String is typically resolved
22       * using the {@link prefuse.util.io.IOLib#streamFromString(String)} method,
23       * allowing URLs, classpath references, and files on the file system
24       * to be accessed.
25       * @param location the location to read the table from
26       * @return the loaded Graph
27       * @throws FileNotFoundException
28       * @throws IOException
29       */
30      public Graph readGraph(String   location) throws DataIOException;
31      
32      /**
33       * Read in a graph from the given URL.
34       * @param url the url to read the graph from
35       * @return the loaded Graph
36       * @throws IOException
37       */
38      public Graph readGraph(URL   url) throws DataIOException;
39      
40      /**
41       * Read in a graph from the given File.
42       * @param f the file to read the graph from
43       * @return the loaded Graph
44       * @throws FileNotFoundException
45       * @throws IOException
46       */
47      public Graph readGraph(File   f) throws DataIOException;
48      
49      /**
50       * Read in a graph from the given InputStream.
51       * @param is the InputStream to read the graph from
52       * @return the loaded Graph
53       * @throws IOException
54       */
55      public Graph readGraph(InputStream   is) throws DataIOException;
56  
57  } // end of interface GraphReader
58
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