io.airlift.slice.Slice.getOutput()方法的使用及代码示例

x33g5p2x  于2022-01-29 转载在 其他  
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本文整理了Java中io.airlift.slice.Slice.getOutput()方法的一些代码示例，展示了Slice.getOutput()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Slice.getOutput()方法的具体详情如下：
包路径：io.airlift.slice.Slice
类名称：Slice
方法名：getOutput

Slice.getOutput介绍

[英]Creates a slice output backed by this slice. Any data written to the slice output will be immediately visible in this slice.
[中]创建此切片支持的切片输出。写入切片输出的任何数据都将立即在该切片中可见。

代码示例

代码示例来源：origin: prestodb/presto

public FixedWidthBlockBuilder(int fixedSize, int positionCount)
{
  super(fixedSize);
  initialized = true;
  Slice slice = Slices.allocate(fixedSize * positionCount);
  this.blockBuilderStatus = null;
  this.sliceOutput = slice.getOutput();
  this.valueIsNull = Slices.allocate(positionCount).getOutput();
}

代码示例来源：origin: prestodb/presto

static Slice concatSlice(Slice... slices)
  {
    int totalLength = Arrays.stream(slices)
        .mapToInt(Slice::length)
        .sum();
    Slice value = Slices.allocate(totalLength);
    SliceOutput output = value.getOutput();
    for (Slice slice : slices) {
      output.writeBytes(slice);
    }
    return value;
  }
}

代码示例来源：origin: prestodb/presto

@Test
public void test()
    throws IOException
{
  List<List<Slice>> groups = new ArrayList<>();
  for (int groupIndex = 0; groupIndex < 3; groupIndex++) {
    List<Slice> group = new ArrayList<>();
    for (int i = 0; i < 1000; i++) {
      Slice value = Slices.allocate(8);
      SliceOutput output = value.getOutput();
      output.writeInt(groupIndex);
      output.writeInt(i);
      group.add(value);
    }
    groups.add(group);
  }
  testWriteValue(groups);
}

代码示例来源：origin: prestodb/presto

@Override
public Block copyPositions(int[] positions, int offset, int length)
{
  checkArrayRange(positions, offset, length);
  SliceOutput newSlice = Slices.allocate(length * fixedSize).getOutput();
  SliceOutput newValueIsNull = null;
  if (valueIsNull != null) {
    newValueIsNull = Slices.allocate(length).getOutput();
  }
  for (int i = offset; i < offset + length; ++i) {
    int position = positions[i];
    checkValidPosition(position, positionCount);
    newSlice.writeBytes(slice, position * fixedSize, fixedSize);
    if (valueIsNull != null) {
      newValueIsNull.writeByte(valueIsNull.getByte(position));
    }
  }
  return new FixedWidthBlock(fixedSize, length, newSlice.slice(), newValueIsNull == null ? null : newValueIsNull.slice());
}

代码示例来源：origin: prestodb/presto

@Override
public Block copyPositions(int[] positions, int offset, int length)
{
  checkArrayRange(positions, offset, length);
  SliceOutput newSlice = Slices.allocate(length * fixedSize).getOutput();
  SliceOutput newValueIsNull = null;
  if (hasNullValue) {
    newValueIsNull = Slices.allocate(length).getOutput();
  }
  for (int i = offset; i < offset + length; ++i) {
    int position = positions[i];
    checkValidPosition(position, positionCount);
    if (hasNullValue) {
      newValueIsNull.appendByte(valueIsNull.getUnderlyingSlice().getByte(position));
    }
    newSlice.writeBytes(getRawSlice(), position * fixedSize, fixedSize);
  }
  return new FixedWidthBlock(fixedSize, length, newSlice.slice(), newValueIsNull == null ? null : newValueIsNull.slice());
}

代码示例来源：origin: prestodb/presto

@Override
public void serialize(LongDecimalWithOverflowState state, BlockBuilder out)
{
  if (state.getLongDecimal() == null) {
    out.appendNull();
  }
  else {
    Slice slice = Slices.allocate(Long.BYTES + UnscaledDecimal128Arithmetic.UNSCALED_DECIMAL_128_SLICE_LENGTH);
    SliceOutput output = slice.getOutput();
    output.writeLong(state.getOverflow());
    output.writeBytes(state.getLongDecimal());
    VARBINARY.writeSlice(out, slice);
  }
}

代码示例来源：origin: prestodb/presto

@Override
public byte[] getSerializedData()
{
  // Serialization format is (<key:int><min:double><max:double>)*
  SliceOutput output = Slices.allocate((SizeOf.SIZE_OF_INT + 2 * SizeOf.SIZE_OF_DOUBLE) * mins.size()).getOutput();
  for (int key : mins.keySet()) {
    output.appendInt(key);
    output.appendDouble(mins.get(key));
    output.appendDouble(maxs.get(key));
  }
  return output.slice().getBytes();
}

代码示例来源：origin: prestodb/presto

@Override
public void serialize(DigestAndPercentileArrayState state, BlockBuilder out)
{
  if (state.getDigest() == null) {
    out.appendNull();
  }
  else {
    Slice digest = state.getDigest().serialize();
    SliceOutput output = Slices.allocate(
        SIZE_OF_INT + // number of percentiles
            state.getPercentiles().size() * SIZE_OF_DOUBLE + // percentiles
            SIZE_OF_INT + // digest length
            digest.length()) // digest
        .getOutput();
    // write percentiles
    List<Double> percentiles = state.getPercentiles();
    output.appendInt(percentiles.size());
    for (double percentile : percentiles) {
      output.appendDouble(percentile);
    }
    output.appendInt(digest.length());
    output.appendBytes(digest);
    VARBINARY.writeSlice(out, output.slice());
  }
}

代码示例来源：origin: prestodb/presto

@Override
public void serialize(LongDecimalWithOverflowAndLongState state, BlockBuilder out)
{
  if (state.getLongDecimal() == null) {
    out.appendNull();
  }
  else {
    Slice slice = Slices.allocate(Long.BYTES + Long.BYTES + UnscaledDecimal128Arithmetic.UNSCALED_DECIMAL_128_SLICE_LENGTH);
    SliceOutput output = slice.getOutput();
    output.writeLong(state.getLong());
    output.writeLong(state.getOverflow());
    output.writeBytes(state.getLongDecimal());
    VARBINARY.writeSlice(out, slice);
  }
}

代码示例来源：origin: prestodb/presto

public Slice serialize()
{
  compact();
  int requiredBytes = SizeOf.SIZE_OF_BYTE + // format
      SizeOf.SIZE_OF_INT + // max buckets
      SizeOf.SIZE_OF_INT + // entry count
      SizeOf.SIZE_OF_DOUBLE * nextIndex + // values
      SizeOf.SIZE_OF_DOUBLE * nextIndex; // weights
  return Slices.allocate(requiredBytes)
      .getOutput()
      .appendByte(FORMAT_TAG)
      .appendInt(maxBuckets)
      .appendInt(nextIndex)
      .appendBytes(Slices.wrappedDoubleArray(values, 0, nextIndex))
      .appendBytes(Slices.wrappedDoubleArray(weights, 0, nextIndex))
      .getUnderlyingSlice();
}

代码示例来源：origin: prestodb/presto

@Override
public Block copyPositions(int[] positions, int offset, int length)
{
  checkArrayRange(positions, offset, length);
  int finalLength = 0;
  for (int i = offset; i < offset + length; i++) {
    finalLength += getSliceLength(positions[i]);
  }
  SliceOutput newSlice = Slices.allocate(finalLength).getOutput();
  int[] newOffsets = new int[length + 1];
  boolean[] newValueIsNull = null;
  if (valueIsNull != null) {
    newValueIsNull = new boolean[length];
  }
  for (int i = 0; i < length; i++) {
    int position = positions[offset + i];
    if (!isEntryNull(position)) {
      newSlice.writeBytes(slice, getPositionOffset(position), getSliceLength(position));
    }
    else if (newValueIsNull != null) {
      newValueIsNull[i] = true;
    }
    newOffsets[i + 1] = newSlice.size();
  }
  return new VariableWidthBlock(0, length, newSlice.slice(), newOffsets, newValueIsNull);
}

代码示例来源：origin: prestodb/presto

@Override
public void serialize(DigestAndPercentileState state, BlockBuilder out)
{
  if (state.getDigest() == null) {
    out.appendNull();
  }
  else {
    Slice serialized = state.getDigest().serialize();
    SliceOutput output = Slices.allocate(SIZE_OF_DOUBLE + SIZE_OF_INT + serialized.length()).getOutput();
    output.appendDouble(state.getPercentile());
    output.appendInt(serialized.length());
    output.appendBytes(serialized);
    VARBINARY.writeSlice(out, output.slice());
  }
}

代码示例来源：origin: prestodb/presto

@Override
public Block copyPositions(int[] positions, int offset, int length)
{
  checkArrayRange(positions, offset, length);
  int finalLength = 0;
  for (int i = offset; i < offset + length; i++) {
    finalLength += getSliceLength(positions[i]);
  }
  SliceOutput newSlice = Slices.allocate(finalLength).getOutput();
  int[] newOffsets = new int[length + 1];
  boolean[] newValueIsNull = null;
  if (hasNullValue) {
    newValueIsNull = new boolean[length];
  }
  for (int i = 0; i < length; i++) {
    int position = positions[offset + i];
    if (isEntryNull(position)) {
      newValueIsNull[i] = true;
    }
    else {
      newSlice.writeBytes(sliceOutput.getUnderlyingSlice(), getPositionOffset(position), getSliceLength(position));
    }
    newOffsets[i + 1] = newSlice.size();
  }
  return new VariableWidthBlock(0, length, newSlice.slice(), newOffsets, newValueIsNull);
}

代码示例来源：origin: prestodb/presto

@SuppressWarnings("AssignmentToForLoopParameter")
private static ColumnData unescape(ColumnData columnData, byte escapeByte)
{
  Slice slice = columnData.getSlice();
  // does slice contain escape byte
  if (slice.indexOfByte(escapeByte) < 0) {
    return columnData;
  }
  Slice newSlice = Slices.allocate(slice.length());
  SliceOutput output = newSlice.getOutput();
  int[] newOffsets = new int[columnData.rowCount() + 1];
  for (int row = 0; row < columnData.rowCount(); row++) {
    int offset = columnData.getOffset(row);
    int length = columnData.getLength(row);
    for (int i = 0; i < length; i++) {
      byte value = slice.getByte(offset + i);
      if (value == escapeByte && i + 1 < length) {
        // read byte after escape
        i++;
        value = slice.getByte(offset + i);
      }
      output.write(value);
    }
    newOffsets[row + 1] = output.size();
  }
  return new ColumnData(newOffsets, output.slice());
}

代码示例来源：origin: com.facebook.presto/presto-spi

public FixedWidthBlockBuilder(int fixedSize, int positionCount)
{
  super(fixedSize);
  initialized = true;
  Slice slice = Slices.allocate(fixedSize * positionCount);
  this.blockBuilderStatus = null;
  this.sliceOutput = slice.getOutput();
  this.valueIsNull = Slices.allocate(positionCount).getOutput();
}

代码示例来源：origin: prestosql/presto

public FixedWidthBlockBuilder(int fixedSize, int positionCount)
{
  super(fixedSize);
  initialized = true;
  Slice slice = Slices.allocate(fixedSize * positionCount);
  this.blockBuilderStatus = null;
  this.sliceOutput = slice.getOutput();
  this.valueIsNull = Slices.allocate(positionCount).getOutput();
}

代码示例来源：origin: io.airlift/slice

@Test
public void testReset()
    throws Exception
{
  assertReset(new DynamicSliceOutput(1));
  assertReset(Slices.allocate(50).getOutput());
}

代码示例来源：origin: airlift/slice

@Test
public void testReset()
    throws Exception
{
  assertReset(new DynamicSliceOutput(1));
  assertReset(Slices.allocate(50).getOutput());
}

代码示例来源：origin: io.airlift/slice

protected void testSliceInput(SliceInputTester tester)
{
  Slice slice = Slices.allocate((BUFFER_SIZE * 3) + 10);
  SliceOutput output = slice.getOutput();
  for (int i = 0; i < slice.length() / tester.valueSize(); i++) {
    tester.loadValue(output, i);
  }
  testReadForward(tester, slice);
  testReadReverse(tester, slice);
  testReadOffEnd(tester, slice);
}

代码示例来源：origin: airlift/slice

protected void testSliceInput(SliceInputTester tester)
{
  Slice slice = Slices.allocate((BUFFER_SIZE * 3) + 10);
  SliceOutput output = slice.getOutput();
  for (int i = 0; i < slice.length() / tester.valueSize(); i++) {
    tester.loadValue(output, i);
  }
  testReadForward(tester, slice);
  testReadReverse(tester, slice);
  testReadOffEnd(tester, slice);
}

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