annotationProcessorPaths editor dosen't recognized imported class

[sysmat]

Apache NetBeans version

Apache NetBeans 26 latest release candidate

What happened

• when I run mvn compile or mvn package in target I see compiled classes but editor has red cannot find symbol
• also auto import not working
• when I run main program everything work

Language / Project Type / NetBeans Component

java maven projcet

How to reproduce

• manifold-template.zip simple maven project
• NB clean & build
• NB run ManifoldTemplate.java see result in output

manifold-template.zip

Did this work correctly in an earlier version?

Apache NetBeans 24

Operating System

win 11

JDK

jdk 8 - 23

Apache NetBeans packaging

Apache NetBeans binary zip

Anything else

No response

Are you willing to submit a pull request?

Yes

[matthiasblaesing]

I doubt this is a problem of the annotation processor paths, but the way manifold integrates with javac. It is not an annotation processor, but a javac plugin and if I'm not missing anything obvious, NetBeans will not run the required code.

[sysmat]

Strange, why then it works in IntelliJ, Eclipse, VSCode

[matthiasblaesing]

Strange, why then it works in IntelliJ, Eclipse, VSCode

Because they have a different approach. If all IDEs would be the same, they would not exist. All approaches have drawbacks and advantages.

It might be possible to enhance the compilation process to consider generated code from a previous maven run (from a quick glance the compilation results in three files in target/classes/templates two look like the missing code. There interesting question is: How will that interact with code generated by javac at compilation time.

For the "it just works everywhere else":

Just downloaded Eclipse 2025-03 (Enterprise Java and Web Developers Variant), unzipped the sample again. Imported the maven project and I'm greeted with red error indicators under the import declaration and the HelloWorld.render call in ManifoldTemplate.java. Running a maven build (goal: package) does not change that, neither does calling "Refresh" on the project tree or running "Project -> Update Maven Project" from the menu. There might be a bit more to this.

[sysmat]

• I like NB, I thought that NB is looking in target for resolving classes.
• In NB when I run it works, but editor is still have error balls

Scanning for projects...

------------------------< si:manifold-template >------------------------
Building manifold-template 1.0-SNAPSHOT
  from pom.xml
--------------------------------[ jar ]---------------------------------

--- resources:3.3.1:resources (default-resources) @ manifold-template ---
Copying 1 resource from src\main\resources to target\classes

--- compiler:3.14.0:compile (default-compile) @ manifold-template ---
Recompiling the module because of changed source code.
Compiling 1 source file with javac [debug release 8] to target\classes

--- exec:3.1.0:exec (default-cli) @ manifold-template ---
Hello World!
------------------------------------------------------------------------
BUILD SUCCESS
------------------------------------------------------------------------
Total time:  2.214 s
Finished at: 2025-05-28T09:17:12+02:00

[sysmat]

I have the same problem with jstachio

<plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.14.0</version>
                <configuration>                    
                    <annotationProcessorPaths>
                        <path>
                            <groupId>io.jstach</groupId>
                            <artifactId>jstachio-apt</artifactId>
                            <version>${io.jstach.version}</version>
                        </path>
                        <!-- other annotation processors -->
                    </annotationProcessorPaths>
                </configuration>
</plugin>

[matthiasblaesing]

No idea what you tested, but the quick example works:

pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>eu.doppelhelix.test</groupId>
    <artifactId>mavenproject1</artifactId>
    <version>0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.release>23</maven.compiler.release>
        <exec.mainClass>eu.doppelhelix.test.mavenproject1.Mavenproject1</exec.mainClass>
        <io.jstach.version>1.3.7</io.jstach.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>io.jstach</groupId>
            <artifactId>jstachio</artifactId>
            <version>${io.jstach.version}</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.14.0</version>
                <configuration>
                    <release>17</release>
                    <annotationProcessorPaths>
                        <path>
                            <groupId>io.jstach</groupId>
                            <artifactId>jstachio-apt</artifactId>
                            <version>${io.jstach.version}</version>
                        </path>
                        <!-- other annotation processors -->
                    </annotationProcessorPaths>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

Mavenproject1.java:

package eu.doppelhelix.test.mavenproject1;

import io.jstach.jstache.JStache;
import io.jstach.jstache.JStacheLambda;
import io.jstach.jstachio.JStachio;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.util.List;

public class Mavenproject1 {

    public static void main(String[] args) {
        Person rick = new Person("Rick", LocalDate.now().minusYears(70));
        Person morty = new Person("Morty", LocalDate.now().minusYears(14));
        Person beth = new Person("Beth", LocalDate.now().minusYears(35));
        Person jerry = new Person("Jerry", LocalDate.now().minusYears(35));
        String actual = JStachio.render(new HelloWorld("Hello alien", List.of(rick, morty, beth, jerry)));
        System.out.println(actual);
    }

    @JStache(template = """
        {{#people}}
        {{message}} {{name}}! You are {{#ageInfo}}{{age}}{{/ageInfo}} years old!
        {{#-last}}
        That is all for now!
        {{/-last}}
        {{/people}}
        """)
    public record HelloWorld(String message, List<Person> people) implements AgeLambdaSupport {

    }

    public record Person(String name, LocalDate birthday) {

    }

    public record AgeInfo(long age, String date) {

    }

    public interface AgeLambdaSupport {

        @JStacheLambda
        default AgeInfo ageInfo(Person person) {
            long age = ChronoUnit.YEARS.between(person.birthday(), LocalDate.now());
            String date = person.birthday().format(DateTimeFormatter.ISO_DATE);
            return new AgeInfo(age, date);
        }

    }
}

[sysmat]

IDE has red balls, when I run it it works, but is so bad DX with this red balls

[sysmat]

[matthiasblaesing]

Why don't you just show your project. Screenshots are beyond useless as I can't place them in my IDE.

[sysmat]

I have some work staff there I'll prepare simple project soon I have time

[sysmat]

• simple maven project in zip
• NB info

Product Version: Apache NetBeans IDE 26
Java: 23; Java HotSpot(TM) 64-Bit Server VM 23+37-2369
Runtime: Java(TM) SE Runtime Environment 23+37-2369
System: Windows 11 version 10.0 running on amd64; UTF-8; en_US (nb)

jstach.zip

[matthiasblaesing]

Ok, looked into the processor of Jstachio and there I find:

https://github.com/jstachio/jstachio/blob/6b19a1a8cf36003513031230fe78404e1a46d50d/compiler/apt/src/main/java/io/jstach/apt/TextFileObject.java#L94-L102

And indeed. When run by the NB infrastructure and break in line 100, I check the two options:

• env.getFiler().getResource(StandardLocation.CLASS_OUTPUT, "", name).toUri().toString() yields file:NBINDEXDIR/s136/java/15/classes/jstachio/mustache/user.mustache
• env.getFiler().getResource(StandardLocation.SOURCE_PATH, "", name).toUri().toString() yields file:/home/matthias/Downloads/jstach/src/main/resources/jstachio/mustache/user.mustache

The first variant is used in the code, the second is documented in the code as the "right" variant and indeed the second does the right thing.

Easiest solution: Convince JStachio developers to check both options and use the most sensible one.

[matthiasblaesing]

As this strayed far from a bug report, I converted this to a discussion.