Java Code Examples for org.datavec.api.records.reader.impl.csv.CSVRecordReader#reset()

The following examples show how to use org.datavec.api.records.reader.impl.csv.CSVRecordReader#reset() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: CSVRecordReaderTest.java From DataVec with Apache License 2.0

6 votes

@Test
public void testReset() throws Exception {
    CSVRecordReader rr = new CSVRecordReader(0, ',');
    rr.initialize(new FileSplit(new ClassPathResource("iris.dat").getFile()));

    int nResets = 5;
    for (int i = 0; i < nResets; i++) {

        int lineCount = 0;
        while (rr.hasNext()) {
            List<Writable> line = rr.next();
            assertEquals(5, line.size());
            lineCount++;
        }
        assertFalse(rr.hasNext());
        assertEquals(150, lineCount);
        rr.reset();
    }
}

Example 2

Source File: CSVRecordReaderTest.java From DataVec with Apache License 2.0

6 votes

@Test
public void testResetWithSkipLines() throws Exception {
    CSVRecordReader rr = new CSVRecordReader(10, ',');
    rr.initialize(new FileSplit(new ClassPathResource("iris.dat").getFile()));
    int lineCount = 0;
    while (rr.hasNext()) {
        rr.next();
        ++lineCount;
    }
    assertEquals(140, lineCount);
    rr.reset();
    lineCount = 0;
    while (rr.hasNext()) {
        rr.next();
        ++lineCount;
    }
    assertEquals(140, lineCount);
}

Example 3

Source File: CSVRecordReaderTest.java From DataVec with Apache License 2.0

6 votes

@Test(expected = NoSuchElementException.class)
public void testCsvSkipAllLines() throws IOException, InterruptedException {
    final int numLines = 4;
    final List<Writable> lineList = Arrays.asList((Writable) new IntWritable(numLines - 1),
                    (Writable) new Text("one"), (Writable) new Text("two"), (Writable) new Text("three"));
    String header = ",one,two,three";
    List<String> lines = new ArrayList<>();
    for (int i = 0; i < numLines; i++)
        lines.add(Integer.toString(i) + header);
    File tempFile = File.createTempFile("csvSkipLines", ".csv");
    FileUtils.writeLines(tempFile, lines);

    CSVRecordReader rr = new CSVRecordReader(numLines, ',');
    rr.initialize(new FileSplit(tempFile));
    rr.reset();
    assertTrue(!rr.hasNext());
    rr.next();
}

Example 4

Source File: CSVRecordReaderTest.java From DataVec with Apache License 2.0

6 votes

@Test
public void testCsvSkipAllButOneLine() throws IOException, InterruptedException {
    final int numLines = 4;
    final List<Writable> lineList = Arrays.<Writable>asList(new Text(Integer.toString(numLines - 1)),
            new Text("one"), new Text("two"), new Text("three"));
    String header = ",one,two,three";
    List<String> lines = new ArrayList<>();
    for (int i = 0; i < numLines; i++)
        lines.add(Integer.toString(i) + header);
    File tempFile = File.createTempFile("csvSkipLines", ".csv");
    FileUtils.writeLines(tempFile, lines);

    CSVRecordReader rr = new CSVRecordReader(numLines - 1, ',');
    rr.initialize(new FileSplit(tempFile));
    rr.reset();
    assertTrue(rr.hasNext());
    assertEquals(rr.next(), lineList);
}

Example 5

Source File: CSVRecordReaderTest.java From DataVec with Apache License 2.0

6 votes

@Test
public void testStreamReset() throws Exception {
    CSVRecordReader rr = new CSVRecordReader(0, ',');
    rr.initialize(new InputStreamInputSplit(new ClassPathResource("iris.dat").getInputStream()));

    int count = 0;
    while(rr.hasNext()){
        assertNotNull(rr.next());
        count++;
    }
    assertEquals(150, count);

    assertFalse(rr.resetSupported());

    try{
        rr.reset();
        fail("Expected exception");
    } catch (Exception e){
        e.printStackTrace();
    }
}

Example 6

Source File: CSVRecordReaderTest.java From deeplearning4j with Apache License 2.0

6 votes

@Test
public void testReset() throws Exception {
    CSVRecordReader rr = new CSVRecordReader(0, ',');
    rr.initialize(new FileSplit(new ClassPathResource("datavec-api/iris.dat").getFile()));

    int nResets = 5;
    for (int i = 0; i < nResets; i++) {

        int lineCount = 0;
        while (rr.hasNext()) {
            List<Writable> line = rr.next();
            assertEquals(5, line.size());
            lineCount++;
        }
        assertFalse(rr.hasNext());
        assertEquals(150, lineCount);
        rr.reset();
    }
}

Example 7

Source File: CSVRecordReaderTest.java From deeplearning4j with Apache License 2.0

6 votes

@Test
public void testResetWithSkipLines() throws Exception {
    CSVRecordReader rr = new CSVRecordReader(10, ',');
    rr.initialize(new FileSplit(new ClassPathResource("datavec-api/iris.dat").getFile()));
    int lineCount = 0;
    while (rr.hasNext()) {
        rr.next();
        ++lineCount;
    }
    assertEquals(140, lineCount);
    rr.reset();
    lineCount = 0;
    while (rr.hasNext()) {
        rr.next();
        ++lineCount;
    }
    assertEquals(140, lineCount);
}

Example 8

Source File: CSVRecordReaderTest.java From deeplearning4j with Apache License 2.0

6 votes

@Test(expected = NoSuchElementException.class)
public void testCsvSkipAllLines() throws IOException, InterruptedException {
    final int numLines = 4;
    final List<Writable> lineList = Arrays.asList((Writable) new IntWritable(numLines - 1),
                    (Writable) new Text("one"), (Writable) new Text("two"), (Writable) new Text("three"));
    String header = ",one,two,three";
    List<String> lines = new ArrayList<>();
    for (int i = 0; i < numLines; i++)
        lines.add(Integer.toString(i) + header);
    File tempFile = File.createTempFile("csvSkipLines", ".csv");
    FileUtils.writeLines(tempFile, lines);

    CSVRecordReader rr = new CSVRecordReader(numLines, ',');
    rr.initialize(new FileSplit(tempFile));
    rr.reset();
    assertTrue(!rr.hasNext());
    rr.next();
}

Example 9

Source File: CSVRecordReaderTest.java From deeplearning4j with Apache License 2.0

6 votes

@Test
public void testCsvSkipAllButOneLine() throws IOException, InterruptedException {
    final int numLines = 4;
    final List<Writable> lineList = Arrays.<Writable>asList(new Text(Integer.toString(numLines - 1)),
            new Text("one"), new Text("two"), new Text("three"));
    String header = ",one,two,three";
    List<String> lines = new ArrayList<>();
    for (int i = 0; i < numLines; i++)
        lines.add(Integer.toString(i) + header);
    File tempFile = File.createTempFile("csvSkipLines", ".csv");
    FileUtils.writeLines(tempFile, lines);

    CSVRecordReader rr = new CSVRecordReader(numLines - 1, ',');
    rr.initialize(new FileSplit(tempFile));
    rr.reset();
    assertTrue(rr.hasNext());
    assertEquals(rr.next(), lineList);
}

Example 10

Source File: CSVRecordReaderTest.java From deeplearning4j with Apache License 2.0

6 votes

@Test
    public void testStreamReset() throws Exception {
        CSVRecordReader rr = new CSVRecordReader(0, ',');
        rr.initialize(new InputStreamInputSplit(new ClassPathResource("datavec-api/iris.dat").getInputStream()));

        int count = 0;
        while(rr.hasNext()){
            assertNotNull(rr.next());
            count++;
        }
        assertEquals(150, count);

        assertFalse(rr.resetSupported());

        try{
            rr.reset();
            fail("Expected exception");
        } catch (Exception e){
            String msg = e.getMessage();
            String msg2 = e.getCause().getMessage();
            assertTrue(msg, msg.contains("Error during LineRecordReader reset"));
            assertTrue(msg2, msg2.contains("Reset not supported from streams"));
//            e.printStackTrace();
        }
    }

Example 11

Source File: TestStreamInputSplit.java From deeplearning4j with Apache License 2.0

5 votes

@Test
public void testCsvSimple() throws Exception {
    File dir = testDir.newFolder();
    File f1 = new File(dir, "file1.txt");
    File f2 = new File(dir, "file2.txt");

    FileUtils.writeStringToFile(f1, "a,b,c\nd,e,f", StandardCharsets.UTF_8);
    FileUtils.writeStringToFile(f2, "1,2,3", StandardCharsets.UTF_8);

    List<URI> uris = Arrays.asList(f1.toURI(), f2.toURI());

    CSVRecordReader rr = new CSVRecordReader();

    TestStreamFunction fn = new TestStreamFunction();
    InputSplit is = new StreamInputSplit(uris, fn);
    rr.initialize(is);

    List<List<Writable>> exp = new ArrayList<>();
    exp.add(Arrays.<Writable>asList(new Text("a"), new Text("b"), new Text("c")));
    exp.add(Arrays.<Writable>asList(new Text("d"), new Text("e"), new Text("f")));
    exp.add(Arrays.<Writable>asList(new Text("1"), new Text("2"), new Text("3")));

    List<List<Writable>> act = new ArrayList<>();
    while(rr.hasNext()){
        act.add(rr.next());
    }

    assertEquals(exp, act);

    //Check that the specified stream loading function was used, not the default:
    assertEquals(uris, fn.calledWithUris);

    rr.reset();
    int count = 0;
    while(rr.hasNext()) {
        count++;
        rr.next();
    }
    assertEquals(3, count);
}

Example 12

Source File: CSVRecordReaderTest.java From DataVec with Apache License 2.0

4 votes

@Test
public void testMeta() throws Exception {
    CSVRecordReader rr = new CSVRecordReader(0, ',');
    rr.initialize(new FileSplit(new ClassPathResource("iris.dat").getFile()));

    int lineCount = 0;
    List<RecordMetaData> metaList = new ArrayList<>();
    List<List<Writable>> writables = new ArrayList<>();
    while (rr.hasNext()) {
        Record r = rr.nextRecord();
        assertEquals(5, r.getRecord().size());
        lineCount++;
        RecordMetaData meta = r.getMetaData();
        //            System.out.println(r.getRecord() + "\t" + meta.getLocation() + "\t" + meta.getURI());

        metaList.add(meta);
        writables.add(r.getRecord());
    }
    assertFalse(rr.hasNext());
    assertEquals(150, lineCount);
    rr.reset();


    System.out.println("\n\n\n--------------------------------");
    List<Record> contents = rr.loadFromMetaData(metaList);
    assertEquals(150, contents.size());
    //        for(Record r : contents ){
    //            System.out.println(r);
    //        }

    List<RecordMetaData> meta2 = new ArrayList<>();
    meta2.add(metaList.get(100));
    meta2.add(metaList.get(90));
    meta2.add(metaList.get(80));
    meta2.add(metaList.get(70));
    meta2.add(metaList.get(60));

    List<Record> contents2 = rr.loadFromMetaData(meta2);
    assertEquals(writables.get(100), contents2.get(0).getRecord());
    assertEquals(writables.get(90), contents2.get(1).getRecord());
    assertEquals(writables.get(80), contents2.get(2).getRecord());
    assertEquals(writables.get(70), contents2.get(3).getRecord());
    assertEquals(writables.get(60), contents2.get(4).getRecord());
}

Example 13

Source File: CSVRecordReaderTest.java From deeplearning4j with Apache License 2.0

4 votes

@Test
public void testMeta() throws Exception {
    CSVRecordReader rr = new CSVRecordReader(0, ',');
    rr.initialize(new FileSplit(new ClassPathResource("datavec-api/iris.dat").getFile()));

    int lineCount = 0;
    List<RecordMetaData> metaList = new ArrayList<>();
    List<List<Writable>> writables = new ArrayList<>();
    while (rr.hasNext()) {
        Record r = rr.nextRecord();
        assertEquals(5, r.getRecord().size());
        lineCount++;
        RecordMetaData meta = r.getMetaData();
        //            System.out.println(r.getRecord() + "\t" + meta.getLocation() + "\t" + meta.getURI());

        metaList.add(meta);
        writables.add(r.getRecord());
    }
    assertFalse(rr.hasNext());
    assertEquals(150, lineCount);
    rr.reset();


    System.out.println("\n\n\n--------------------------------");
    List<Record> contents = rr.loadFromMetaData(metaList);
    assertEquals(150, contents.size());
    //        for(Record r : contents ){
    //            System.out.println(r);
    //        }

    List<RecordMetaData> meta2 = new ArrayList<>();
    meta2.add(metaList.get(100));
    meta2.add(metaList.get(90));
    meta2.add(metaList.get(80));
    meta2.add(metaList.get(70));
    meta2.add(metaList.get(60));

    List<Record> contents2 = rr.loadFromMetaData(meta2);
    assertEquals(writables.get(100), contents2.get(0).getRecord());
    assertEquals(writables.get(90), contents2.get(1).getRecord());
    assertEquals(writables.get(80), contents2.get(2).getRecord());
    assertEquals(writables.get(70), contents2.get(3).getRecord());
    assertEquals(writables.get(60), contents2.get(4).getRecord());
}