indexedfidreadertest.java

shape file read and write

/*
 *    GeoTools - OpenSource mapping toolkit
 *    http://geotools.org
 *    (C) 2002-2006, GeoTools Project Managment Committee (PMC)
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 */
package org.geotools.data.shapefile.indexed;

import java.io.IOException;

import org.geotools.data.shapefile.ShpFiles;
import org.geotools.data.shapefile.shp.IndexFile;

public class IndexedFidReaderTest extends FIDTestCase {
    public IndexedFidReaderTest(  ) throws IOException {
        super("IndexedFidReaderTest");
    }

    private IndexedFidReader reader;

    private IndexFile indexFile;

    protected void setUp() throws Exception {
        super.setUp();

        ShpFiles shpFiles = new ShpFiles(backshp.toURL());
        FidIndexer.generate(shpFiles);

        indexFile = new IndexFile(shpFiles, false);
        reader = new IndexedFidReader(shpFiles);
    }

    protected void tearDown() throws Exception {
        reader.close();
        indexFile.close();
        super.tearDown();
    }

    /*
     * Test method for 'org.geotools.index.fid.IndexedFidReader.findFid(String)'
     */
    public void testFindFid() throws Exception {
        long offset = reader.findFid("roads.4");
        assertEquals(3, offset);

        offset = reader.findFid("roads.1");
        assertEquals(0, offset);

        // test if the fid is too high
        offset = reader.findFid("roads.10000000");
        assertEquals(-1, offset);

        // test if the fid is negative
        offset = reader.findFid("roads.-1");
        assertEquals(-1, offset);

    }

    // test if FID no longer exists.
    public void testFindDeletedFID() throws Exception {
        reader.close();

        ShpFiles shpFiles = new ShpFiles(fixFile);
        IndexedFidWriter writer = new IndexedFidWriter(shpFiles);
        try {
            writer.next();
            writer.next();
            writer.next();
            writer.remove();
            while( writer.hasNext() ) {
                writer.next();
            }
        } finally {
            writer.close();
            reader.close();
        }

        reader = new IndexedFidReader(shpFiles);

        long offset = reader.findFid(TYPE_NAME + ".11");
        assertEquals(9, offset);

        offset = reader.findFid(TYPE_NAME + ".4");
        assertEquals(2, offset);

        offset = reader.findFid(TYPE_NAME + ".3");
        assertEquals(-1, offset);

    }

    public void testHardToFindFid() throws Exception {
        long offset = reader.search(5, 3, 7, 5);
        assertEquals(4, offset);
    }

    /*
     * Test method for 'org.geotools.index.fid.IndexedFidReader.goTo(int)'
     */
    public void testGoTo() throws IOException {
        reader.goTo(10);
        assertEquals(shpFiles.getTypeName() + ".11", reader.next());
        assertTrue(reader.hasNext());

        reader.goTo(15);
        assertEquals(shpFiles.getTypeName() + ".16", reader.next());
        assertTrue(reader.hasNext());

        reader.goTo(0);
        assertEquals(shpFiles.getTypeName() + ".1", reader.next());
        assertTrue(reader.hasNext());

        reader.goTo(3);
        assertEquals(shpFiles.getTypeName() + ".4", reader.next());
        assertTrue(reader.hasNext());
    }
}