Examples of org.geotools.data.shapefile.shp.IndexFile

org.geotools.data.shapefile.shp.IndexFile
sri.com/library/whitepapers/pdfs/shapefile.pdf">"ESRI(r) Shapefile - A Technical Description"
* 'An ESRI White Paper . May 1997' @author Ian Schneider @source $URL$

     */
    public static void generate(ShpFiles shpFiles) throws IOException {
        LOGGER.fine("Generating fids for " + shpFiles.get(SHP));


        
        IndexFile indexFile = null;
        StorageFile file = shpFiles.getStorageFile(FIX);
        IndexedFidWriter writer = null;
        
        try {
            indexFile = new IndexFile(shpFiles, false);


            // writer closes channel for you.
            writer = new IndexedFidWriter(shpFiles, file);


            for (int i = 0, j = indexFile.getRecordCount(); i < j; i++) {
                writer.next();
            }


        } finally {
            try {
                if (writer != null) {
                    writer.close();
                }
                file.replaceOriginal();
            } finally {
                if (indexFile != null) {
                    indexFile.close();
                }
            }
        }
    }

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        if (shpFiles.isLocal() && !shpFiles.exists(SHX)) {
            return null;
        }


        try {
            return new IndexFile(shpFiles, store.isMemoryMapped());
        } catch (IOException e) {
            // could happen if shx file does not exist remotely
            return null;
        }
    }

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    @Before
    public void setUpIndexedFidReaderTest() throws Exception {
        shpFiles = new ShpFiles(backshp.toURI().toURL());
        FidIndexer.generate(shpFiles);


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

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        } else {
            throw new StoreException("Asked byte order '" + this.byteOrder
                    + "' must be 'NL' or 'NM'!");
        }


        IndexFile shpIndex = new IndexFile(shpFiles, false);
        QuadTree tree = null;
        int cnt = 0;
        int numRecs = shpIndex.getRecordCount();
        ShapefileHeader header = reader.getHeader();
        Envelope bounds = new Envelope(header.minX(), header.maxX(), header
                .minY(), header.maxY());


        tree = new QuadTree(numRecs, max, bounds, shpIndex);

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    }


    @Override
    protected int getCountInternal(Query query) throws IOException {
        if (query.getFilter() == Filter.INCLUDE) {
            IndexFile file = getDataStore().shpManager.openIndexFile();
            if (file != null) {
                try {
                    return file.getRecordCount();
                } finally {
                    file.close();
                }
            }


            // no Index file so use the number of shapefile records
            ShapefileReader reader = getDataStore().shpManager.openShapeReader(

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    private IndexedFidWriter writer;


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

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        IndexedFidReader reader = new IndexedFidReader(shpFiles);


        List<Data> records = new ArrayList(idsSet.size());
        try {
            IndexFile shx = store.shpManager.openIndexFile();
            try {


                DataDefinition def = new DataDefinition("US-ASCII");
                def.addField(Integer.class);
                def.addField(Long.class);
                for (Identifier identifier : idsSet) {
                    String fid = identifier.toString();
                    long recno = reader.findFid(fid);
                    if (recno == -1) {
                        if (LOGGER.isLoggable(Level.FINEST)) {
                            LOGGER.finest("fid " + fid
                                    + " not found in index, continuing with next queried fid...");
                        }
                        continue;
                    }
                    try {
                        Data data = new Data(def);
                        data.addValue(new Integer((int) recno + 1));
                        data.addValue(new Long(shx.getOffsetInBytes((int) recno)));
                        if (LOGGER.isLoggable(Level.FINEST)) {
                            LOGGER.finest("fid " + fid + " found for record #" + data.getValue(0)
                                    + " at index file offset " + data.getValue(1));
                        }
                        records.add(data);
                    } catch (Exception e) {
                        IOException exception = new IOException();
                        exception.initCause(e);
                        throw exception;
                    }
                }
            } finally {
                shx.close();
            }
        } finally {
            reader.close();
        }

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        final URL url3 = TestData.url(TestCaseSupport.class, STATEPOP_IDX);
        final ShapefileReader reader1 = new ShapefileReader(new ShpFiles(url1),
                false, false, new GeometryFactory());
        final ShapefileReader reader2 = new ShapefileReader(new ShpFiles(url2),
                false, false, new GeometryFactory());
        final IndexFile index = new IndexFile(new ShpFiles(url3), false);
        try {
            for (int i = 0; i < index.getRecordCount(); i++) {
                if (reader1.hasNext()) {


                    Geometry g1 = (Geometry) reader1.nextRecord().shape();
                    Geometry g2 = (Geometry) reader2.shapeAt(2 * (index
                            .getOffset(i)));
                    assertTrue(g1.equalsExact(g2));


                } else {
                    fail("uneven number of records");
                }
                // assertEquals(reader1.nextRecord().offset(),index.getOffset(i));
            }
        } finally {
            index.close();
            reader2.close();
            reader1.close();
        }
    }

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Related Classes of org.geotools.data.shapefile.shp.IndexFile

org.geotools.data.shapefile.fid.FidIndexer

org.geotools.data.shapefile.fid.IndexedFidReaderTest

org.geotools.data.shapefile.fid.IndexedFidWriterTest

org.geotools.data.shapefile.IndexManager

org.geotools.data.shapefile.ShapefileFeatureSource

org.geotools.data.shapefile.ShapeFileIndexer

org.geotools.data.shapefile.ShapefileSetManager

org.geotools.data.shapefile.ShapefileTest

java.io.IOException

java.nio.IntBuffer

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