Example usage for org.apache.lucene.store IndexInput seek

Introduction

In this page you can find the example usage for org.apache.lucene.store IndexInput seek.

Prototype

public abstract void seek(long pos) throws IOException;

Source Link

Document

Sets current position in this file, where the next read will occur.

Usage

From source file:com.bah.lucene.BaseDirectoryTestSuite.java

License:Apache License

private void testEof(String name, Directory directory, long length) throws IOException {
    IndexInput input = directory.openInput(name, IOContext.DEFAULT);
    try {/*from w w w.  jav  a 2  s .  c om*/
        input.seek(length);
        input.readByte();
        fail("should throw eof");
    } catch (IOException e) {
    }
}

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From source file:com.bah.lucene.BaseDirectoryTestSuite.java

License:Apache License

private void assertInputsEquals(String name, Directory fsDir, Directory hdfs) throws IOException {
    int reads = random.nextInt(MAX_NUMBER_OF_READS);
    IndexInput fsInput = fsDir.openInput(name, IOContext.DEFAULT);
    IndexInput hdfsInput = hdfs.openInput(name, IOContext.DEFAULT);
    assertEquals(fsInput.length(), hdfsInput.length());
    int fileLength = (int) fsInput.length();
    for (int i = 0; i < reads; i++) {
        byte[] fsBuf = new byte[random.nextInt(Math.min(MAX_BUFFER_SIZE - MIN_BUFFER_SIZE, fileLength))
                + MIN_BUFFER_SIZE];//from   w w  w .  ja  v  a  2  s.c  om
        byte[] hdfsBuf = new byte[fsBuf.length];
        int offset = random.nextInt(fsBuf.length);
        int length = random.nextInt(fsBuf.length - offset);
        int pos = random.nextInt(fileLength - length);
        fsInput.seek(pos);
        fsInput.readBytes(fsBuf, offset, length);
        hdfsInput.seek(pos);
        hdfsInput.readBytes(hdfsBuf, offset, length);
        for (int f = offset; f < length; f++) {
            if (fsBuf[f] != hdfsBuf[f]) {
                fail();
            }
        }
    }
    fsInput.close();
    hdfsInput.close();
}

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From source file:com.bah.lucene.blockcache.BlockDirectoryTest.java

License:Apache License

private void testEof(String name, Directory directory, long length) throws IOException {
    IndexInput input = directory.openInput(name, IOContext.DEFAULT);
    input.seek(length);
    try {/*from w  w  w .  j  a v  a2s  .co  m*/
        input.readByte();
        fail("should throw eof");
    } catch (IOException e) {
    }
}

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From source file:com.bah.lucene.blockcache.BlockDirectoryTest.java

License:Apache License

private void assertInputsEquals(String name, Directory fsDir, Directory hdfs) throws IOException {
    int reads = random.nextInt(MAX_NUMBER_OF_READS);
    IndexInput fsInput = fsDir.openInput(name, IOContext.DEFAULT);
    IndexInput hdfsInput = hdfs.openInput(name, IOContext.DEFAULT);
    assertEquals(fsInput.length(), hdfsInput.length());
    int fileLength = (int) fsInput.length();
    if (fileLength != 0) {
        for (int i = 0; i < reads; i++) {
            byte[] fsBuf = new byte[random.nextInt(Math.min(MAX_BUFFER_SIZE - MIN_BUFFER_SIZE, fileLength))
                    + MIN_BUFFER_SIZE];//from w w  w.j  a va  2 s .  com
            byte[] hdfsBuf = new byte[fsBuf.length];
            int offset = random.nextInt(fsBuf.length);
            int length = random.nextInt(fsBuf.length - offset);
            int pos = random.nextInt(fileLength - length);
            fsInput.seek(pos);
            fsInput.readBytes(fsBuf, offset, length);
            hdfsInput.seek(pos);
            hdfsInput.readBytes(hdfsBuf, offset, length);
            for (int f = offset; f < length; f++) {
                if (fsBuf[f] != hdfsBuf[f]) {
                    fail(Long.toString(seed) + " read [" + i + "]");
                }
            }
        }
    }
    fsInput.close();
    hdfsInput.close();
}

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From source file:com.bah.lucene.blockcache_v2.CacheIndexInputTest.java

License:Apache License

public static void readRandomData(IndexInput baseInput, IndexInput testInput, Random random, int sampleSize,
        int maxBufSize, int maxOffset) throws IOException {
    assertEquals(baseInput.length(), testInput.length());
    int fileLength = (int) baseInput.length();
    for (int i = 0; i < sampleSize; i++) {
        int position = random.nextInt(fileLength - maxBufSize);
        int bufSize = random.nextInt(maxBufSize - maxOffset) + 1;
        byte[] buf1 = new byte[bufSize];
        byte[] buf2 = new byte[bufSize];

        int offset = random.nextInt(Math.min(maxOffset, bufSize));
        int len = Math.min(random.nextInt(bufSize - offset), fileLength - position);

        baseInput.seek(position);
        baseInput.readBytes(buf1, offset, len);
        testInput.seek(position);//from   w w w  .j  ava2  s.  co  m
        testInput.readBytes(buf2, offset, len);
        assertArrayEquals("Read [" + i + "] The position is [" + position + "] and bufSize [" + bufSize + "]",
                buf1, buf2);
    }
}

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From source file:com.bah.lucene.blockcache_v2.CacheIndexInputTest.java

License:Apache License

public static void readRandomDataInt(IndexInput baseInput, IndexInput testInput, Random random, int sampleSize)
        throws IOException {
    assertEquals(baseInput.length(), testInput.length());
    int fileLength = (int) baseInput.length();
    for (int i = 0; i < sampleSize; i++) {
        int position = random.nextInt(fileLength - 4);
        baseInput.seek(position);
        int i1 = baseInput.readInt();
        testInput.seek(position);// www .  j a va 2 s.  co m
        int i2 = testInput.readInt();
        assertEquals("Read [" + i + "] The position is [" + position + "]", i1, i2);
    }
}

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From source file:com.bah.lucene.blockcache_v2.CacheIndexInputTest.java

License:Apache License

public static void readRandomDataShort(IndexInput baseInput, IndexInput testInput, Random random,
        int sampleSize) throws IOException {
    assertEquals(baseInput.length(), testInput.length());
    int fileLength = (int) baseInput.length();
    for (int i = 0; i < sampleSize; i++) {
        int position = random.nextInt(fileLength - 2);
        baseInput.seek(position);
        short i1 = baseInput.readShort();
        testInput.seek(position);/*from www. j  a v  a2  s .  c  o m*/
        short i2 = testInput.readShort();
        assertEquals("Read [" + i + "] The position is [" + position + "]", i1, i2);
    }
}

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From source file:com.bah.lucene.blockcache_v2.CacheIndexInputTest.java

License:Apache License

public static void readRandomDataLong(IndexInput baseInput, IndexInput testInput, Random random, int sampleSize)
        throws IOException {
    assertEquals(baseInput.length(), testInput.length());
    int fileLength = (int) baseInput.length();
    for (int i = 0; i < sampleSize; i++) {
        int position = random.nextInt(fileLength - 8);
        baseInput.seek(position);
        long i1 = baseInput.readLong();
        testInput.seek(position);//w  w  w.  j  ava  2s.  co  m
        long i2 = testInput.readLong();
        assertEquals("Read [" + i + "] The position is [" + position + "]", i1, i2);
    }
}

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From source file:com.github.lucene.store.jdbc.index.AbstractIndexInputOutputITest.java

License:Apache License

private void verifyData() throws IOException {
    final byte[] test = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
    Assert.assertTrue(jdbcDirectory.fileExists("value1"));
    Assert.assertEquals(36, jdbcDirectory.fileLength("value1"));

    final IndexInput indexInput = jdbcDirectory.openInput("value1", new IOContext());
    Assert.assertEquals(-1, indexInput.readInt());
    Assert.assertEquals(10, indexInput.readLong());
    Assert.assertEquals(0, indexInput.readInt());
    Assert.assertEquals(0, indexInput.readInt());
    indexInput.readBytes(test, 0, 8);//from   w  ww  .  jav a  2 s. co m
    Assert.assertEquals((byte) 1, test[0]);
    Assert.assertEquals((byte) 8, test[7]);
    indexInput.readBytes(test, 0, 5);
    Assert.assertEquals((byte) 1, test[0]);
    Assert.assertEquals((byte) 5, test[4]);

    indexInput.seek(28);
    Assert.assertEquals((byte) 1, indexInput.readByte());
    indexInput.seek(30);
    Assert.assertEquals((byte) 3, indexInput.readByte());

    indexInput.close();
}

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From source file:com.lucure.core.codec.ForUtil.java

License:Apache License

/**
 * Skip the next block of data./* w  w w . j a va 2s .c  om*/
 *
 * @param in      the input where to read data
 * @throws IOException If there is a low-level I/O error
 */
void skipBlock(IndexInput in) throws IOException {
    final int numBits = in.readByte();
    if (numBits == ALL_VALUES_EQUAL) {
        in.readVInt();
        return;
    }
    assert numBits > 0 && numBits <= 32 : numBits;
    final int encodedSize = encodedSizes[numBits];
    in.seek(in.getFilePointer() + encodedSize);
}

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