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Java > Open Source Codes > prefuse > data > io > AbstractTableReader


1 package prefuse.data.io;
2
3 import java.io.File JavaDoc;
4 import java.io.FileInputStream JavaDoc;
5 import java.io.FileNotFoundException JavaDoc;
6 import java.io.IOException JavaDoc;
7 import java.io.InputStream JavaDoc;
8 import java.net.URL JavaDoc;
9
10 import prefuse.data.Table;
11 import prefuse.util.io.IOLib;
12
13
14 /**
15  * Abstract base class implementation of the TableReader interface. Provides
16  * implementations for all but the
17  * {@link prefuse.data.io.TableReader#readTable(InputStream)} method.
18  *
19  * @author <a HREF="http://jheer.org">jeffrey heer</a>
20  */
21 public abstract class AbstractTableReader implements TableReader {
22
23     /**
24      * @see prefuse.data.io.TableReader#readTable(java.lang.String)
25      */
26     public Table readTable(String JavaDoc location) throws DataIOException
27     {
28         try {
29             InputStream JavaDoc is = IOLib.streamFromString(location);
30             if ( is == null )
31                 throw new DataIOException("Couldn't find " + location
32                     + ". Not a valid file, URL, or resource locator.");
33             return readTable(is);
34         } catch ( IOException JavaDoc e ) {
35             throw new DataIOException(e);
36         }
37     }
38
39     /**
40      * @see prefuse.data.io.TableReader#readTable(java.net.URL)
41      */
42     public Table readTable(URL JavaDoc url) throws DataIOException {
43         try {
44             return readTable(url.openStream());
45         } catch ( IOException JavaDoc e ) {
46             throw new DataIOException(e);
47         }
48     }
49
50     /**
51      * @see prefuse.data.io.TableReader#readTable(java.io.File)
52      */
53     public Table readTable(File JavaDoc f) throws DataIOException {
54         try {
55             return readTable(new FileInputStream JavaDoc(f));
56         } catch ( FileNotFoundException JavaDoc e ) {
57             throw new DataIOException(e);
58         }
59     }
60
61 } // end of abstract class AbstractTableReader
62
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