List of readBlock() Examples

Examples of readBlock()

com.facebook.presto.block.rle.RunLengthBlockEncoding.readBlock()
com.facebook.presto.spi.block.BlockEncoding.readBlock()
Read a block from the specified input. The returned block should begin at the specified position.
com.facebook.presto.spi.block.VariableWidthBlockEncoding.readBlock()
eu.stratosphere.nephele.services.iomanager.BlockChannelReader.readBlock()
Issues a read request, which will asynchronously fill the given segment with the next block in the underlying file channel. Once the read request is fulfilled, the segment will be added to this reader's return queue. @param segment The segment to read the block into. @throws IOException Thrown, when the reader encounters an I/O error. Due to the asynchronous nature of thereader, the exception thrown here may have been caused by an earlier read request.
org.apache.flink.runtime.io.disk.iomanager.BlockChannelReader.readBlock()
Issues a read request, which will asynchronously fill the given segment with the next block in the underlying file channel. Once the read request is fulfilled, the segment will be added to this reader's return queue. @param segment The segment to read the block into. @throws IOException Thrown, when the reader encounters an I/O error. Due to the asynchronous nature of thereader, the exception thrown here may have been caused by an earlier read request.
org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock()
Read in a file block. @param dataBlockOffset offset to read. @param onDiskBlockSize size of the block @param cacheBlock @param pread Use positional read instead of seek+read (positional isbetter doing random reads whereas seek+read is better scanning). @param isCompaction is this block being read as part of a compaction @param expectedBlockType the block type we are expecting to read with thisread operation, or null to read whatever block type is available and avoid checking (that might reduce caching efficiency of encoded data blocks) @return Block wrapped in a ByteBuffer. @throws IOException
org.nfctools.spi.acs.AcrMfUlReaderWriter.readBlock()
org.nfctools.test.MemoryMapUlReaderWriter.readBlock()

Examples of com.facebook.presto.spi.block.BlockEncoding.readBlock()

        Block expectedBlock = expectedBlockBuilder.build();


        BlockEncoding snappyEncoding = encoder.finish();
        assertTrue(encoderOutput.size() < expectedBlock.getSizeInBytes());


        Block actualBlock = snappyEncoding.readBlock(encoderOutput.slice().getInput());


        BlockAssertions.assertBlockEquals(actualBlock, expectedBlock);
    }
}

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Examples of com.facebook.presto.spi.block.BlockEncoding.readBlock()

        @Override
        public DictionaryBlockEncoding readEncoding(TypeManager manager, BlockEncodingSerde serde, SliceInput input)
        {
            // read the dictionary
            BlockEncoding dictionaryEncoding = serde.readBlockEncoding(input);
            RandomAccessBlock dictionary = dictionaryEncoding.readBlock(input).toRandomAccessBlock();


            // read the id block encoding
            BlockEncoding idBlockEncoding = serde.readBlockEncoding(input);
            return new DictionaryBlockEncoding(dictionary, idBlockEncoding);
        }

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Examples of com.facebook.presto.spi.block.BlockEncoding.readBlock()

        @Override
        public DictionaryBlockEncoding readEncoding(TypeManager manager, BlockEncodingSerde serde, SliceInput input)
        {
            // read the dictionary
            BlockEncoding dictionaryEncoding = serde.readBlockEncoding(input);
            Block dictionary = dictionaryEncoding.readBlock(input);


            // read the id block encoding
            BlockEncoding idBlockEncoding = serde.readBlockEncoding(input);
            return new DictionaryBlockEncoding(dictionary, idBlockEncoding);
        }

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Examples of com.facebook.presto.spi.block.BlockEncoding.readBlock()


        DynamicSliceOutput sliceOutput = new DynamicSliceOutput(1024);
        BlockEncoding blockEncoding = new RunLengthEncoder(sliceOutput, VARCHAR).append(expectedBlock).finish();
        SliceInput sliceInput = sliceOutput.slice().getInput();


        Block block = blockEncoding.readBlock(sliceInput);
        assertInstanceOf(block, RunLengthEncodedBlock.class);
        RunLengthEncodedBlock rleBlock = (RunLengthEncodedBlock) block;
        assertTrue(positionEqualsPosition(VARCHAR, rleBlock, 0, expectedBlock, 0));
        assertEquals(rleBlock.getPositionCount(), 2);
        assertEquals(VARCHAR.getSlice(rleBlock, 0).toStringUtf8(), "alice");

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Examples of com.facebook.presto.spi.block.BlockEncoding.readBlock()

        RunLengthEncodedBlock rleBlock = (RunLengthEncodedBlock) block;
        assertTrue(positionEqualsPosition(VARCHAR, rleBlock, 0, expectedBlock, 0));
        assertEquals(rleBlock.getPositionCount(), 2);
        assertEquals(VARCHAR.getSlice(rleBlock, 0).toStringUtf8(), "alice");


        block = blockEncoding.readBlock(sliceInput);
        assertInstanceOf(block, RunLengthEncodedBlock.class);
        rleBlock = (RunLengthEncodedBlock) block;
        assertTrue(positionEqualsPosition(VARCHAR, rleBlock, 0, expectedBlock, 2));
        assertEquals(rleBlock.getPositionCount(), 4);
        assertEquals(VARCHAR.getSlice(rleBlock, 0).toStringUtf8(), "bob");

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Examples of com.facebook.presto.spi.block.BlockEncoding.readBlock()

        rleBlock = (RunLengthEncodedBlock) block;
        assertTrue(positionEqualsPosition(VARCHAR, rleBlock, 0, expectedBlock, 2));
        assertEquals(rleBlock.getPositionCount(), 4);
        assertEquals(VARCHAR.getSlice(rleBlock, 0).toStringUtf8(), "bob");


        block = blockEncoding.readBlock(sliceInput);
        assertInstanceOf(block, RunLengthEncodedBlock.class);
        rleBlock = (RunLengthEncodedBlock) block;
        assertTrue(positionEqualsPosition(VARCHAR, rleBlock, 0, expectedBlock, 6));
        assertEquals(rleBlock.getPositionCount(), 6);
        assertEquals(VARCHAR.getSlice(rleBlock, 0).toStringUtf8(), "charlie");

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Examples of com.facebook.presto.spi.block.BlockEncoding.readBlock()

        Block expectedBlock = expectedBlockBuilder.build();


        DynamicSliceOutput sliceOutput = new DynamicSliceOutput(1024);
        BlockEncoding blockEncoding = new VariableWidthBlockEncoding();
        blockEncoding.writeBlock(sliceOutput, expectedBlock);
        Block actualBlock = blockEncoding.readBlock(sliceOutput.slice().getInput());
        BlockAssertions.assertBlockEquals(VARCHAR, actualBlock, expectedBlock);
    }


    @Test
    public void testCreateBlockWriter()

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Examples of com.facebook.presto.spi.block.BlockEncoding.readBlock()

        VARCHAR.writeString(blockBuilder, "dave");
        Block block = blockBuilder.build();


        DynamicSliceOutput sliceOutput = new DynamicSliceOutput(1024);
        BlockEncoding blockEncoding = new UncompressedEncoder(VARCHAR, sliceOutput).append(block).append(block).finish();
        Block actualBlock = blockEncoding.readBlock(sliceOutput.slice().getInput());


        BlockBuilder expectedBlockBuilder = VARCHAR.createBlockBuilder(new BlockBuilderStatus());
        VARCHAR.writeString(expectedBlockBuilder, "alice");
        VARCHAR.writeString(expectedBlockBuilder, "bob");
        VARCHAR.writeString(expectedBlockBuilder, "charlie");

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Examples of com.facebook.presto.spi.block.BlockEncoding.readBlock()

        VARCHAR.writeString(blockBuilder, "dave");
        Block block = blockBuilder.build();


        DynamicSliceOutput sliceOutput = new DynamicSliceOutput(1024);
        BlockEncoding blockEncoding = new DictionaryEncoder(VARCHAR, new UncompressedEncoder(VARCHAR, sliceOutput)).append(block).append(block).append(block).finish();
        Block actualBlock = blockEncoding.readBlock(sliceOutput.slice().getInput());


        BlockBuilder expectedBlockBuilder = VARCHAR.createBlockBuilder(new BlockBuilderStatus());
        VARCHAR.writeString(expectedBlockBuilder, "alice");
        VARCHAR.writeString(expectedBlockBuilder, "bob");
        VARCHAR.writeString(expectedBlockBuilder, "charlie");

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Examples of com.facebook.presto.spi.block.BlockEncoding.readBlock()

        DynamicSliceOutput compressedOutput = new DynamicSliceOutput(1024);
        Encoder encoder = BlocksFileEncoding.SNAPPY.createBlocksWriter(VARCHAR, compressedOutput);


        encoder.append(block);
        BlockEncoding snappyEncoding = encoder.finish();
        Block actualBlock = snappyEncoding.readBlock(compressedOutput.slice().getInput());
        BlockAssertions.assertBlockEquals(VARCHAR, actualBlock, block);
    }


    @Test
    public void testLotsOfStuff()

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