indexedfidwritertest.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 java.net.MalformedURLException;

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

public class IndexedFidWriterTest extends FIDTestCase {
    private IndexFile indexFile;
    private IndexedFidWriter writer;

    public IndexedFidWriterTest() throws IOException {
        super("IndexedFidWriterTest");
    }
    
    protected void setUp() throws Exception {
        super.setUp();
    }

    private void initWriter() throws IOException, MalformedURLException {
        close();
        indexFile = new IndexFile(shpFiles, false);
        writer = new IndexedFidWriter(shpFiles);
    }

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

    private void close() throws IOException {
        if ((writer != null) && !writer.isClosed()) {
            writer.close();
        }

        try {
            if (indexFile != null) {
                indexFile.close();
            }
        } catch (Exception e) {
            // fine if already closed
        }
    }

    /*
     * Test method for 'org.geotools.index.fid.IndexedFidWriter.hasNext()'
     */
    public void testHasNext() throws MalformedURLException, IOException {
        FidIndexer.generate(backshp.toURL());
        initWriter();

        for( int i = 1, j = indexFile.getRecordCount(); i < j; i++ ) {
            assertTrue(i + "th record", writer.hasNext());
            assertEquals((long) i, writer.next());
        }
    }

    /*
     * Test method for 'org.geotools.index.fid.IndexedFidWriter.remove()'
     */
    public void testRemove() throws MalformedURLException, IOException {
        FidIndexer.generate(backshp.toURL());
        initWriter();
        writer.next();
        writer.remove();

        for( int i = 2, j = indexFile.getRecordCount(); i < j; i++ ) {
            assertTrue(writer.hasNext());
            assertEquals((long) i, writer.next());
        }

        writer.write();
        close();

        initWriter();

        for( int i = 1, j = indexFile.getRecordCount() - 1; i < j; i++ ) {
            assertTrue(writer.hasNext());
            assertEquals((long) i + 1, writer.next());
        }
    }

    public void testRemoveCounting() throws Exception {
        FidIndexer.generate(backshp.toURL());
        initWriter();
        writer.next();
        writer.remove();
        writer.next();
        writer.remove();
        writer.next();
        writer.remove();

        while( writer.hasNext() ) {
            writer.next();
            writer.write();
        }

        close();
        IndexedFidReader reader = new IndexedFidReader(shpFiles);
        try {
            assertEquals(3, reader.getRemoves());
        } finally {
            reader.close();
        }

        // remove some more features
        initWriter();
        writer.next();
        writer.next();
        writer.next();
        writer.remove();
        writer.next();
        writer.remove();
        writer.next();
        writer.next();
        writer.next();
        writer.remove();
        while( writer.hasNext() ) {
            writer.next();
            writer.write();
        }

        close();

        reader = new IndexedFidReader(shpFiles);
        try {
            assertEquals(6, reader.getRemoves());
        } finally {
            reader.close();
        }

    }

    /*
     * Test method for 'org.geotools.index.fid.IndexedFidWriter.write()'
     */
    public void testWrite() throws IOException {
        initWriter();

        for( int i = 0; i < 5; i++ ) {
            writer.next();
            writer.write();
        }

        close();
        initWriter();

        for( int i = 1; i < 5; i++ ) {
            assertTrue(writer.hasNext());
            assertEquals((long) i, writer.next());
        }
    }

}