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https://issues.apache.org/jira/browse/FOP-3281?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Reischenbacher updated FOP-3281:
-----------------------------------------
    Description: 
The main pom.xml uses version 2.14 of the maven-checkstyle-plugin, which 
internally uses Checkstyle version 5.8.

I suggest to update to version 3.6.0 of the plugin, so that Checkstyle 9.3 is 
being used. This would improve compatibility with Checkstyle plugins for IDEs 
(e.g. "CheckStyle-IDEA" with IntelliJ)

Most notable changes:

* The InnerAssignment check is validated much more strictly requiring to turn 
off the check in several Java files via
{code:java}
// CSOFF: InnerAssignment
{code}
so that code like this doesn't cause warnings (extracted from 
DelimitedTextRange.java):
{code:java}
if ((levels = UnicodeBidiAlgorithm.resolveLevels(buffer, 
paragraphEmbeddingLevel)) != null) {
{code}
* The OneStatementPerLine check requires to move the "break;" statement inside 
"switch" fragments into its own line
{code:java}
case Constants.FO_TABLE:
    holderName = "table";
    break;
{code}
* The ImportOrder check unfortunately works completely different now. Static 
imports can't be displayed together with the group of the non-static imports, 
when a new line should be generated between non-static and static imports. 
Therefore all static imports have to be defined now below the non-static 
imports. So a notation likeĀ 
{code:java}
import java.io.IOException;
import java.io.Writer;

import static java.lang.Character.isHighSurrogate;

import org.apache.fop.events.EventBroadcaster;
import org.apache.fop.render.pdf.PDFEventProducer;
{code}
has to be changed too
{code:java}
import java.io.IOException;
import java.io.Writer;


import org.apache.fop.events.EventBroadcaster;
import org.apache.fop.render.pdf.PDFEventProducer;

import static java.lang.Character.isHighSurrogate;
{code}
* Some files had CRLF line endings (e.g. 
fop-core/src/main/java/org/apache/fop/render/pdf/ImageRawPNGAdapter.java). 
Those were changed to LF line endings (like the majority of the fiels)

  was:
The main pom.xml uses version 2.14 of the maven-checkstyle-plugin, which 
internally uses Checkstyle version 5.8.

I suggest to update to version 3.6.0 of the plugin, so that Checkstyle 9.3 is 
being used. This would improve compatibility with Checkstyle plugins for IDEs 
(e.g. "CheckStyle-IDEA" with IntelliJ)


> Update the checkstyle dependency
> --------------------------------
>
>                 Key: FOP-3281
>                 URL: https://issues.apache.org/jira/browse/FOP-3281
>             Project: FOP
>          Issue Type: Improvement
>            Reporter: Matthias Reischenbacher
>            Assignee: Matthias Reischenbacher
>            Priority: Minor
>
> The main pom.xml uses version 2.14 of the maven-checkstyle-plugin, which 
> internally uses Checkstyle version 5.8.
> I suggest to update to version 3.6.0 of the plugin, so that Checkstyle 9.3 is 
> being used. This would improve compatibility with Checkstyle plugins for IDEs 
> (e.g. "CheckStyle-IDEA" with IntelliJ)
> Most notable changes:
> * The InnerAssignment check is validated much more strictly requiring to turn 
> off the check in several Java files via
> {code:java}
> // CSOFF: InnerAssignment
> {code}
> so that code like this doesn't cause warnings (extracted from 
> DelimitedTextRange.java):
> {code:java}
> if ((levels = UnicodeBidiAlgorithm.resolveLevels(buffer, 
> paragraphEmbeddingLevel)) != null) {
> {code}
> * The OneStatementPerLine check requires to move the "break;" statement 
> inside "switch" fragments into its own line
> {code:java}
> case Constants.FO_TABLE:
>     holderName = "table";
>     break;
> {code}
> * The ImportOrder check unfortunately works completely different now. Static 
> imports can't be displayed together with the group of the non-static imports, 
> when a new line should be generated between non-static and static imports. 
> Therefore all static imports have to be defined now below the non-static 
> imports. So a notation likeĀ 
> {code:java}
> import java.io.IOException;
> import java.io.Writer;
> import static java.lang.Character.isHighSurrogate;
> import org.apache.fop.events.EventBroadcaster;
> import org.apache.fop.render.pdf.PDFEventProducer;
> {code}
> has to be changed too
> {code:java}
> import java.io.IOException;
> import java.io.Writer;
> import org.apache.fop.events.EventBroadcaster;
> import org.apache.fop.render.pdf.PDFEventProducer;
> import static java.lang.Character.isHighSurrogate;
> {code}
> * Some files had CRLF line endings (e.g. 
> fop-core/src/main/java/org/apache/fop/render/pdf/ImageRawPNGAdapter.java). 
> Those were changed to LF line endings (like the majority of the fiels)



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