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chore: add warning about java options #357

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Sep 9, 2023
Merged

chore: add warning about java options #357

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6 changes: 6 additions & 0 deletions docs/faq.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -184,6 +184,12 @@ No.

Sometimes, you might see a message like `` Jul 17, 2019 10:21:25 AM org.apache.pdfbox.pdmodel.font.PDType1Font WARNING: Using fallback font NimbusSanL-Regu for Univers. Nothing was parsed from this one.`` This error message came from Apache PDFBox which is used under tabula-java, and this is caused by the PDF itself. Neither tabula-py nor tabula-java can't handle the warning itself, except for the silent option that suppresses the warning.

``java_options`` is ignored once ``read_pdf`` or similar funcion is called.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Since jpype doesn't support changing JVM options after the JVM is started, ``java_options`` is ignored once ``read_pdf`` or similar funcion is called. If you want to change JVM options, you need to restart the Python process.
See also: https://jpype.readthedocs.io/en/latest/api.html#jpype.shutdownJVM


I can't figure out accurate extraction with tabula-py. Are there any similar Python libraries?
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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8 changes: 6 additions & 2 deletions tabula/io.py
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Expand Up @@ -66,6 +66,8 @@ def _run(
global _tabula_vm
if not _tabula_vm:
_tabula_vm = TabulaVm(java_options, options.silent)
elif java_options:
logger.warning("java_options is ignored until rebooting the Python process.")

return _tabula_vm.call_tabula_java(options, path)

Expand Down Expand Up @@ -151,7 +153,7 @@ def read_pdf(
encoding (str, optional):
Encoding type for pandas. Default: ``utf-8``
java_options (list, optional):
Set java options.
Set java options. This option will be ignored once JVM is launched.

Example:
``["-Xmx256m"]``
Expand Down Expand Up @@ -503,6 +505,7 @@ def read_pdf_with_template(
Encoding type for pandas. Default is 'utf-8'
java_options (list, optional):
Set java options like ``["-Xmx256m"]``.
This option will be ignored once JVM is launched.
user_agent (str, optional):
Set a custom user-agent when download a pdf from a url. Otherwise
it uses the default ``urllib.request`` user-agent.
Expand Down Expand Up @@ -732,7 +735,7 @@ def convert_into(
Output format of this function (``csv``, ``json`` or ``tsv``).
Default: ``csv``
java_options (list, optional):
Set java options
Set java options. This option will be ignored once JVM is launched.

Example:
``"-Xmx256m"``.
Expand Down Expand Up @@ -866,6 +869,7 @@ def convert_into_by_batch(
Output format of this function (csv, json or tsv)
java_options (list, optional):
Set java options like `-Xmx256m`.
This option will be ignored once JVM is launched.
pages (str, int, `iterable` of `int`, optional):
An optional values specifying pages to extract from. It allows
`str`,`int`, `iterable` of :`int`. Default: `1`
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