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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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"""Attach distributed task execution to Python search readers."""

from contextlib import contextmanager
import math


@contextmanager
def closing_task_results(results):
    """Close scheduled work without replacing an existing execution failure."""
    try:
        yield results
    except BaseException:
        try:
            results.close()
        except BaseException:
            pass
        raise
    else:
        results.close()


def create_distributed_reader(reader, executor):
    executor = executor.with_concurrency(executor.concurrency)
    from pypaimon.execution.python.read.search.full_text_read import DataEvolutionFullTextRead

    if isinstance(reader, DataEvolutionFullTextRead):
        if (type(reader) is not DataEvolutionFullTextRead
                or not reader._table.options.data_evolution_enabled()):
            raise ValueError("Ray full-text search supports only data-evolution tables.")
        from pypaimon.execution.python.read.search.distributed_full_text_search import DistributedFullTextRead
        return DistributedFullTextRead(reader, executor)
    if getattr(reader, '_new_distributed_reader', None) is None:
        raise ValueError("This reader does not support distributed search.")
    return reader._new_distributed_reader(executor)


def validate_query_vectors(queries):
    if not all(math.isfinite(float(value)) for query in queries for value in query):
        raise ValueError("Ray vector search requires a finite query vector.")