com.pervasive.datarush.encoding.binary

Class AbstractScalarEncoder

java.lang.Object

com.pervasive.datarush.encoding.binary.AbstractTokenEncoder

com.pervasive.datarush.encoding.binary.AbstractScalarEncoder

All Implemented Interfaces:

TokenEncoder

public abstract class AbstractScalarEncoder
extends AbstractTokenEncoder

Base class for scalar encoders. Handles uniform encoding of null values.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractScalarEncoder() Initializes a new encoder.

Method Summary

Modifier and Type	Method and Description
void	encode(BinaryBuilder buffer) This implementation invokes encodeScalar(BinaryBuilder) in the event that the source is non-null.
void	encodeField(BinaryBuilder buffer, int index) This implementation delegates to TokenEncoder.encode(BinaryBuilder).
protected abstract void	encodeScalar(BinaryBuilder buffer) Subclasses must override this method to handle the encoding of the value.

Methods inherited from class com.pervasive.datarush.encoding.binary.AbstractTokenEncoder

doSourceUpdated, getSource, setSource

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractScalarEncoder

protected AbstractScalarEncoder()

Initializes a new encoder.

Method Detail

encode

public final void encode(BinaryBuilder buffer)

This implementation invokes encodeScalar(BinaryBuilder) in the event that the source is non-null.

Parameters:

buffer - the buffer to which to append the encoding

encodeField

public void encodeField(BinaryBuilder buffer,
                        int index)

Description copied from class: AbstractTokenEncoder

This implementation delegates to TokenEncoder.encode(BinaryBuilder). Implementations that require field-specific handling should override this method instead.

Specified by:

encodeField in interface TokenEncoder

Overrides:

encodeField in class AbstractTokenEncoder

Parameters:

buffer - the buffer to which to append the encoding

index - the index of the field to encode

encodeScalar

protected abstract void encodeScalar(BinaryBuilder buffer)

Subclasses must override this method to handle the encoding of the value. This method is guaranteed to only be invoked if non-null.

Parameters:

buffer - The buffer to encode into.