Am 17.03.23 um 10:09 schrieb axh:
Hi,
I am developing a software that relies heavily on Apache PdfBox. It uses the
current the current PDFBox 3.0.0 from trunk, with some patches.
I wanted to know what your thoughts are about raising the minimum Java version for
PDFBox 3.x to Java 11. I know some might say "we are still on JDK 8 and will be
for the foreseeable future“. But then you could probably stay on the 2.x line of
PDFBox, since you won’t be able to update most of your technology stack to recent
versions anyway:
- Spring BOOT 3 requires Java 17
- WildFly 27 dropped support for Java 8, and while I don’t have access to the
Redhat docs, I think so will JBOSS 8
- Hibernate 6 requires at least Java 11
- Apache Tomcat 6 requires at least Java 11, 6.1 even requires 17
Has to be a typo, Tomcat 9 or 10 are the recent to be used. ;-)
- Apache Lucene 9.5 requires Java 11
IMHO, the next major version a.k.a. PDFBox 3.0.0 would be the right moment to
increase the required Java version.
Yes, but I don't see any reason to do so. The trunk version works fine with java
19 and 20. As long as we don't really need any java9 or later feature I tend to
stick with java8. We don't have to switch just because others are doing so ;-)
Andreas
- PDFBox uses classes and methods that are deprecated in newer Java versions.
- IMHO it will also be harder to get contributors.
- Some things have to be done in a cumbersome and less performant way to
maintain Java 8 compatibility because functionality introduced in newer JDKs
cannot be used to keep Java 8 compatibility:
Java 8 (current implementation):
public static byte[] toByteArray(InputStream in) throws IOException
{
ByteArrayOutputStream baout = new ByteArrayOutputStream();
copy(in, baout);
return baout.toByteArray();
}
public static long copy(InputStream input, OutputStream output) throws
IOException
{
byte[] buffer = new byte[4096];
long count = 0;
int n = 0;
while (-1 != (n = input.read(buffer)))
{
output.write(buffer, 0, n);
count += n;
}
return count;
}
Java 11:
public static byte[] toByteArray(InputStream in) throws IOException {
return in.readAllBytes();
}
public static long copy(InputStream input, OutputStream output) throws
IOException {
return input.transferTo(output);
}
I would like to contribute to PDFBox, but would really suggest to bump the
required Java version to Java 11. I personally would be OK with going directly
to 17 like Spring framework did, but I can see that Java 11 compatibility might
be a serious issue for some.
What are your thoughts on this matter?
Axel
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