Java Community | Help. Code. Learn.•6mo ago

InvocationTargetException using JCI

I try to run a simple main to compile(!) some java code. This is my pom:

<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>a</groupId>
    <artifactId>a</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <properties>
        <java.version>22</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-jci-javac</artifactId>
            <version>1.0</version>
        </dependency>
    </dependencies>
</project>

<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>a</groupId>
    <artifactId>a</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <properties>
        <java.version>22</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-jci-javac</artifactId>
            <version>1.0</version>
        </dependency>
    </dependencies>
</project>

And this is my main-class:

package a;

import java.nio.charset.StandardCharsets;

import org.apache.commons.jci.compilers.*;
import org.apache.commons.jci.readers.MemoryResourceReader;
import org.apache.commons.jci.stores.MemoryResourceStore;

public class Test {
    public static void main(final String[] args) {
        JavaCompilerFactory cf = new JavaCompilerFactory();
        JavaCompiler compiler = cf.createCompiler("javac");
        MemoryResourceReader pReader = new MemoryResourceReader();
        int i = 0;
        pReader.add("Test.java", "class Test{}".getBytes(StandardCharsets.UTF_8));
        MemoryResourceStore pStore = new MemoryResourceStore();
        CompilationResult result = compiler.compile(new String[] { pReader.list()[0] }, pReader, pStore,
                Test.class.getClassLoader());
        System.out.println(result.getErrors()[0]);
    }
}

package a;

import java.nio.charset.StandardCharsets;

import org.apache.commons.jci.compilers.*;
import org.apache.commons.jci.readers.MemoryResourceReader;
import org.apache.commons.jci.stores.MemoryResourceStore;

public class Test {
    public static void main(final String[] args) {
        JavaCompilerFactory cf = new JavaCompilerFactory();
        JavaCompiler compiler = cf.createCompiler("javac");
        MemoryResourceReader pReader = new MemoryResourceReader();
        int i = 0;
        pReader.add("Test.java", "class Test{}".getBytes(StandardCharsets.UTF_8));
        MemoryResourceStore pStore = new MemoryResourceStore();
        CompilationResult result = compiler.compile(new String[] { pReader.list()[0] }, pReader, pStore,
                Test.class.getClassLoader());
        System.out.println(result.getErrors()[0]);
    }
}

My output is: (0:0) : Error while executing the compiler: java.lang.reflect.InvocationTargetException What am I doing wrong?

37 Replies

JavaBot•6mo ago

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dan1st•6mo ago

Can you please show the full stack trace?

JavaBot•6mo ago

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Peter RaderOP•5mo ago

No stacktrace. Sorry.

dan1st•5mo ago

Is the above the full error message? Can you add a DiagnosticListener?

Peter RaderOP•5mo ago

I dont know what a DiagnosticListener is. I could give you a github repo. Yes

dan1st•5mo ago

Oh I thought you were using the JavaCompiler API from https://docs.oracle.com/en/java/javase/21/docs/api/java.compiler/javax/tools/JavaCompiler.html

JavaCompiler (Java SE 21 & JDK 21)

declaration: module: java.compiler, package: javax.tools, interface: JavaCompiler

dan1st•5mo ago

Can you use setCompilationProblemHandler() and create a custom CompilationProblemHandler? to get more information about the error

Peter RaderOP•5mo ago

Sure I can. tbh, the JavaCompiler gives the same problem. I set

compiler.setCompilationProblemHandler(new CompilationProblemHandler() {

            @Override
            public boolean handle(final CompilationProblem pProblem) {
                System.out.println("dddd" + pProblem);
                return false;
            }
        });

compiler.setCompilationProblemHandler(new CompilationProblemHandler() {

            @Override
            public boolean handle(final CompilationProblem pProblem) {
                System.out.println("dddd" + pProblem);
                return false;
            }
        });

but the console does not print the dddd-line. I think the handler does not fire.

dan1st•5mo ago

? Did you try updating to version 1.1? or even 2.0 What is printed with System.out.println(result.getErrors()[0].getMessage());? or actually can you use a debugger and show the content of CompilationResult? or is that one returning null? Also it seems like that library is using Apache Commons Logging for quite some stuff - can you enable debug logging there? Also are you getting any other result if you use a different compiler? e.g. cf.createCompiler("eclipse") Looking at the sources, the support for the Eclipse compiler is more complete in that library

dan1st•5mo ago

at least it isn't that: https://github.com/apache/commons-jci/blob/master/compilers/jsr199/src/main/java/org/apache/commons/jci2/compiler/jsr199/Jsr199CompilationProblem.java

GitHub

commons-jci/compilers/jsr199/src/main/java/org/apache/commons/jci2/...

Apache Commons JCI. Contribute to apache/commons-jci development by creating an account on GitHub.

Peter RaderOP•5mo ago

(0:0) : Error while executing the compiler: java.lang.reflect.InvocationTargetException

dan1st•5mo ago

Is that the message?

Peter RaderOP•5mo ago

Yes

dan1st•5mo ago

Peter RaderOP•5mo ago

There is no version 1.1 There is no version 2

Peter RaderOP•5mo ago

dan1st•5mo ago

https://repo1.maven.org/maven2/org/apache/commons/commons-jci-core/ just not of commons-jci-javac Though I don't think JSR199 is supported so jkust use the Eclipse compiler with 1.1

Peter RaderOP•5mo ago

I locked the transitive dependency 1.1 of -core using

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-jci-core</artifactId>
                <version>1.1</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-jci-core</artifactId>
                <version>1.1</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

But the result remains the same.

dan1st•5mo ago

As I said, don't use commons-cli-javac Don't use javac there that doesn't really seem supported any more

Peter RaderOP•5mo ago

So they left a faulty JavaCompiler API in the jdk?

dan1st•5mo ago

? The one in the JDK is perfectly fine

Peter RaderOP•5mo ago

dan1st•5mo ago

but Apache Commons JCI doesn't have that any more

Peter RaderOP•5mo ago

Same problem!

dan1st•5mo ago

You haven't shown me the same thing with the JDK APIs and unless you show me, it doesn't exist as far as I'm concerned

Peter RaderOP•5mo ago

Yes, again! JavaCompiler API gives same problem.

dan1st•5mo ago

you still haven't shown me

Peter RaderOP•5mo ago

I will, give me a moment.

dan1st•5mo ago

Note: I don't doubt that exception would be there but it probably has a reason and should give you more details if you properly ask for it

Peter RaderOP•5mo ago

package a;

public class Test {
    public static void main(final String[] args) {
        com.sun.tools.javac.Main.compile(new String[] { "src/main/java/a/Test.java" });
    }
}

package a;

public class Test {
    public static void main(final String[] args) {
        com.sun.tools.javac.Main.compile(new String[] { "src/main/java/a/Test.java" });
    }
}

gives (0:0) : Error while executing the compiler: java.lang.reflect.InvocationTargetException. I mean, it makes totaly sense! commons-jci-javac is instrumenting javac! commons-jci-core is a wrapper that makes exactly this: com.sun.tools.javac.Main.compile(new String[] { ... });

dan1st•5mo ago

src/main/java? Seriously? That's com.sun.tools.javac not javax.compiler If it's in com.sun, it's internal meaning you should probably not use it

Peter RaderOP•5mo ago

It is a public-static-void-main(string[] args) Its javac imo

dan1st•5mo ago

Don't be so sure if you don't use it correctly

dan1st•5mo ago

Until now, I haven't seen any correct use of https://docs.oracle.com/en/java/javase/21/docs/api/java.compiler/javax/tools/JavaCompiler.html from you

JavaCompiler (Java SE 21 & JDK 21)

declaration: module: java.compiler, package: javax.tools, interface: JavaCompiler

dan1st•5mo ago

neither have I seen you using JCI version 1.1 with EJC

JavaBot•5mo ago

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InvocationTargetException using JCI