BinaryBuilder (Dataflow Library Distribution Project 7.0.2-37 API)

java.lang.Object
- com.pervasive.datarush.io.BinaryBuilder

```
public class BinaryBuilder
extends Object
```
A buffer for building variable-length binary valued data. An internal buffer is used to accumulate the binary value, resizing as necessary. Additionally, a number of encodings for multi-byte values such as (but not limited to) longs and doubles is supported. A BinaryBuilder is similar in function to StringBuilder, although it does not allow mutation of previously written data.

Constructor Summary

Constructors
Constructor and Description

BinaryBuilder(int initialSize)
Creates a new buffer sized as specified.

Constructors
Constructor and Description
`BinaryBuilder(int initialSize)` Creates a new buffer sized as specified.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`append(byte value)` Appends a byte to the buffer.
`void`	`append(byte[] values)` Appends a sequence of bytes to the buffer.
`void`	`append(byte[] values, int offset, int length)` Appends a subsequence of bytes to the buffer.
`void`	`append(char data)` Appends a character value to the buffer.
`void`	`append(CharSequence values)` Appends a sequence of character values to the buffer.
`void`	`append(double value)` Appends a a double value to the buffer.
`void`	`append(float value)` Appends a float value to the buffer.
`void`	`append(int value)` Appends an int value to the buffer.
`void`	`append(long value)` Appends a long value to the buffer.
`void`	`appendBase128(int value)` Appends an int value to the buffer, using variable length base-128 encoding.
`void`	`appendBase128(long value)` Appends a long value to the buffer, using variable length base-128 encoding.
`void`	`appendSingleByte(CharSequence values)` Appends a sequence of character values to the buffer using only a single byte per character.
`void`	`appendUnsignedBase128(int value)` Appends an int value to the buffer, using variable length base-128 encoding with bias towards non-negative values.
`void`	`appendUnsignedBase128(long value)` Appends a long value to the buffer, using variable length base-128 encoding with bias towards non-negative values.
`static int`	`base128Size(int value)` Computes the length of the base-128 encoding of an int value.
`static int`	`base128Size(long value)` Computes the length of the base-128 encoding of an long value.
`void`	`copy(byte[] dest, int offset)` Extracts the current contents of the builder to the specified array at the given offset.
`static void`	`encodeInt32(int value, byte[] data, int offset)` Writes a 32-bit integer value into the specified position in the given array.
`static void`	`encodeUnsignedBase128(long value, byte[] data, int offset)` Writes a 64-bit integer value using base-128 encoding into the specified position in the given array.
`void`	`reset()` Resets the buffer to empty.
`void`	`set(int position, int data)` Sets 4 bytes beginning at the specified position to the given value.
`int`	`size()` Gets the current size of the binary sequence represented by the builder.
`byte[]`	`toBinary()` Gets the current contents of the builder.
`ByteBuffer`	`toByteBuffer()` Gets a `ByteBuffer` that wraps the internal bytes storage of this builder object.
`String`	`toString()`
`static int`	`unsignedBase128Size(int value)` Computes the length of the non-negative biased base-128 encoding of an int value.
`static int`	`unsignedBase128Size(long value)` Computes the length of the non-negative biased base-128 encoding of an long value.
`void`	`writeToStream(OutputStream out)` Writes the current contents of the builder to the specified `OutputStream`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - BinaryBuilder
```
public BinaryBuilder(int initialSize)
```
    Creates a new buffer sized as specified. The buffer is initially empty.
    
    Parameters:
    
    initialSize - the size, in bytes, of the internal storage buffer
- Method Detail
  - size
```
public int size()
```
    Gets the current size of the binary sequence represented by the builder.
    
    Returns:
    
    the current size of the binary data
  - set
```
public void set(int position,
                int data)
```
    Sets 4 bytes beginning at the specified position to the given value.
    
    Parameters:
    
    position - the byte offset at which to write the update
    
    data - the 4 byte value to write
  - append
```
public void append(byte value)
```
    Appends a byte to the buffer.
    
    Parameters:
    
    value - the byte to append
  - append
```
public void append(byte[] values)
```
    Appends a sequence of bytes to the buffer.
    This is equivalent to calling append(values, 0, values.length).
    
    Parameters:
    
    values - the bytes to append
  - append
```
public void append(byte[] values,
                   int offset,
                   int length)
```
    Appends a subsequence of bytes to the buffer.
    
    Parameters:
    
    values - the sequence containing the bytes to append
    
    offset - the starting position of the subsequence
    
    length - the length of the subsequence
  - append
```
public void append(char data)
```
    Appends a character value to the buffer. Values are represented using 2 bytes.
    
    Parameters:
    
    data - the character to append
  - append
```
public void append(CharSequence values)
```
    Appends a sequence of character values to the buffer.
    Functionally equivalent to calling append(char) on every element in the sequence, though slightly more efficient.
    
    Parameters:
    
    values - the character values to append
  - appendSingleByte
```
public void appendSingleByte(CharSequence values)
```
    Appends a sequence of character values to the buffer using only a single byte per character. The least significant byte is encoded. Therefore this encoding can be lossy if any characters cannot be represented in a single byte.
    
    Parameters:
    
    values - the character values to append
  - append
```
public void append(int value)
```
    Appends an int value to the buffer. Values are represented using 4 bytes.
    
    Parameters:
    
    value - the value to append
  - appendUnsignedBase128
```
public void appendUnsignedBase128(int value)
```
    Appends an int value to the buffer, using variable length base-128 encoding with bias towards non-negative values. If values are known to be non-negative, this guarantees an equal or smaller sized encoding than appendBase128(int) produces. Negative values will always encode to the maximum length.
    Base-128 can produce more compact encodings, with the size being proportional to the size of the value. Encodings will vary between 1 and 5 bytes, depending on the value encoded.
    
    Parameters:
    
    value - the unsigned value to append in base-128
  - appendBase128
```
public void appendBase128(int value)
```
    Appends an int value to the buffer, using variable length base-128 encoding. Encoding is unbiased with respect to sign, so that values with smaller absolute values will have shorter encodings.
    Base-128 can produce more compact encodings, with the size being proportional to the size of the value. Encodings will vary between 1 and 5 bytes, depending on the value encoded.
    
    Parameters:
    
    value - the signed value to append in base-128
  - append
```
public void append(long value)
```
    Appends a long value to the buffer. Values are represented using 8 bytes.
    
    Parameters:
    
    value - the value to append
  - appendUnsignedBase128
```
public void appendUnsignedBase128(long value)
```
    Appends a long value to the buffer, using variable length base-128 encoding with bias towards non-negative values. If values are known to be non-negative, this guarantees an equal or smaller sized encoding than appendBase128(long) produces. Negative values will always encode to the maximum length.
    Base-128 can produce more compact encodings, with the size being proportional to the size of the value. Encodings will vary between 1 and 10 bytes, depending on the value encoded.
    
    Parameters:
    
    value - the unsigned value to append in base-128
  - appendBase128
```
public void appendBase128(long value)
```
    Appends a long value to the buffer, using variable length base-128 encoding. Encoding is unbiased with respect to sign, so that values with smaller absolute values will have shorter encodings.
    Base-128 can produce more compact encodings, with the size being proportional to the size of the value. Encodings will vary between 1 and 10 bytes, depending on the value encoded.
    
    Parameters:
    
    value - the signed value to append in base-128
  - append
```
public void append(float value)
```
    Appends a float value to the buffer. Values are represented using 4 bytes, as mapped by Float.floatToRawIntBits(float).
    
    Parameters:
    
    value - the value to append
  - append
```
public void append(double value)
```
    Appends a a double value to the buffer. Values are represented using 8 bytes, as mapped by Double.doubleToRawLongBits(double).
    
    Parameters:
    
    value - the value to append
  - toBinary
```
public byte[] toBinary()
```
    Gets the current contents of the builder.
    
    Returns:
    
    a copy of the current buffer
  - toByteBuffer
```
public ByteBuffer toByteBuffer()
```
    Gets a ByteBuffer that wraps the internal bytes storage of this builder object. The byte buffer will wrap from the start of the internal byte storage to its current size.
    
    Returns:
    
    ByteBuffer wrapping the internal storage of this builder
  - copy
```
public void copy(byte[] dest,
                 int offset)
```
    Extracts the current contents of the builder to the specified array at the given offset.
    
    Parameters:
    
    dest - the target array into which to copy
    
    offset - the offset into the target array at which to start
  - writeToStream
```
public void writeToStream(OutputStream out)
                   throws IOException
```
    Writes the current contents of the builder to the specified OutputStream. This is more efficient than calling out.write(toBinary()), as it avoids making an extra copy of the data.
    
    Parameters:
    
    out - the target to which to write the buffer contents
    
    Throws:
    
    IOException - if an error occurs during the write
  - reset
```
public void reset()
```
    Resets the buffer to empty.
  - base128Size
```
public static final int base128Size(int value)
```
    Computes the length of the base-128 encoding of an int value.
    
    Parameters:
    
    value - the value for which to determine the encoding size
    
    Returns:
    
    the length, in bytes, of the encoding
    
    See Also:
    
    appendBase128(int)
  - unsignedBase128Size
```
public static final int unsignedBase128Size(int value)
```
    Computes the length of the non-negative biased base-128 encoding of an int value.
    
    Parameters:
    
    value - the value for which to determine the encoding size
    
    Returns:
    
    the length, in bytes, of the encoding
    
    See Also:
    
    appendUnsignedBase128(int)
  - base128Size
```
public static final int base128Size(long value)
```
    Computes the length of the base-128 encoding of an long value.
    
    Parameters:
    
    value - the value for which to determine the encoding size
    
    Returns:
    
    the length, in bytes, of the encoding
    
    See Also:
    
    appendBase128(long)
  - unsignedBase128Size
```
public static final int unsignedBase128Size(long value)
```
    Computes the length of the non-negative biased base-128 encoding of an long value.
    
    Parameters:
    
    value - the value for which to determine the encoding size
    
    Returns:
    
    the length, in bytes, of the encoding
    
    See Also:
    
    appendUnsignedBase128(int)
  - encodeInt32
```
public static final void encodeInt32(int value,
                                     byte[] data,
                                     int offset)
```
    Writes a 32-bit integer value into the specified position in the given array.
    
    Parameters:
    
    value - the value to write
    
    data - the buffer to update
    
    offset - the byte offset at which to write
  - encodeUnsignedBase128
```
public static final void encodeUnsignedBase128(long value,
                                               byte[] data,
                                               int offset)
```
    Writes a 64-bit integer value using base-128 encoding into the specified position in the given array.
    
    Parameters:
    
    value - the value to write in base-128
    
    data - the buffer to update
    
    offset - the byte offset at which to write
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class BinaryBuilder

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

BinaryBuilder

Method Detail

size

set

append

append

append

append

append

appendSingleByte

append

appendUnsignedBase128

appendBase128

append

appendUnsignedBase128

appendBase128

append

append

toBinary

toByteBuffer

copy

writeToStream

reset

base128Size

unsignedBase128Size

base128Size

unsignedBase128Size

encodeInt32

encodeUnsignedBase128

toString