Extractor
Methods
- extract() : Generator<Signal|null, void>
- Yields rows in batches. When the source is a BatchableExtractor a batch holds between 0 and that extractor's own batchSize() rows; the size is chosen by the extractor and MAY vary between batches. Consumers must not assume a minimum size, a constant size, or a non-empty batch.
- schema() : Schema
- Answers before extract() runs, so every batch it yields carries this shape. Takes no FlowContext: a source that needs the pipeline's context to describe itself has not moved the answer to bind time.
- withSchema() : static
- Declares the shape every yielded batch must carry. A source that describes itself uses this instead of its own description, and values are cast to fit.
Methods
extract()
Yields rows in batches. When the source is a BatchableExtractor a batch holds between 0 and that extractor's own batchSize() rows; the size is chosen by the extractor and MAY vary between batches. Consumers must not assume a minimum size, a constant size, or a non-empty batch.
public
extract(FlowContext $context) : Generator<Signal|null, void>
yield from is forbidden here: it routes send() into the delegate, so Signal::STOP is never observed by this generator.
Parameters
- $context : FlowContext
Return values
Generator<Signal|null, void>schema()
Answers before extract() runs, so every batch it yields carries this shape. Takes no FlowContext: a source that needs the pipeline's context to describe itself has not moved the answer to bind time.
public
schema() : Schema
Tags
Return values
SchemawithSchema()
Declares the shape every yielded batch must carry. A source that describes itself uses this instead of its own description, and values are cast to fit.
public
withSchema(Schema $schema) : static
Parameters
- $schema : Schema