DXF load error when maven packaging

Aspose.CAD Product Family
1

has an error using Aspose CAD libraries with Spring Boot Maven project as below :
a. Proudct : Aspose Total for Java(v3.0)
b. Error issue
After Spring Boot Maven packaging ( .jar ), error occurs when loading dxf file by
Image.load() from the codes created “CadImage image = (CadImage) Image.load(sourcePath)” ;
However, it works well in local IDE before the packaging.
c. Version with error : from 21.3 version or newer ; 20.9 version has no this problem.
d. Test OS : Windows 10, Ubuntu 22.04
e. Java being used : OpenJDK 18.0.2
Please check and advise why the problem occurs and how it can be solved.
Your prompt attention to the matter will be appreciated.

f. Error Code:
com.aspose.cad.cadexceptions.ImageLoadException: Image loading failed: Cannot invoke “com.aspose.cad.system.collections.Generic.Dictionary.tryGetValue(Object, Object[])” because the return value of “com.aspose.cad.fileformats.cad.cadobjects.CadBase.h()” is null
at com.aspose.cad.Image.a(Unknown Source)
at com.aspose.cad.Image.load(Unknown Source)
…
Caused by: com.aspose.cad.cadexceptions.ImageLoadException: Cannot invoke “com.aspose.cad.system.collections.Generic.Dictionary.tryGetValue(Object, Object[])” because the return value of “com.aspose.cad.fileformats.cad.cadobjects.CadBase.h()” is null
at com.aspose.cad.internal.km.k.a(Unknown Source)
… 15 common frames omitted
Caused by: java.lang.NullPointerException: Cannot invoke “com.aspose.cad.system.collections.Generic.Dictionary.tryGetValue(Object, Object[])” because the return value of “com.aspose.cad.fileformats.cad.cadobjects.CadBase.h()” is null
at com.aspose.cad.fileformats.cad.cadobjects.CadBase.a(Unknown Source)
at com.aspose.cad.internal.gO.a.a(Unknown Source)
at com.aspose.cad.internal.gO.f.b(Unknown Source)
at com.aspose.cad.internal.gO.f.a(Unknown Source)
at com.aspose.cad.fileformats.cad.cadtables.CadVportTableObject.a(Unknown Source)
at com.aspose.cad.internal.gi.g.a(Unknown Source)
at com.aspose.cad.internal.gi.g.a(Unknown Source)
at com.aspose.cad.internal.gi.c.i(Unknown Source)
at com.aspose.cad.internal.gi.c.C(Unknown Source)
at com.aspose.cad.internal.gi.c.s(Unknown Source)
… 16 common frames omitted

2

@hs.jo,
Hello, could you please attach the DXF file you are using, so we can reproduce?

3

p7ymwgz7.zip (12.3 KB)

I tested with this file, it works fine in local IDE(v22.6) and packag jar with version 20.9

4

@hs.jo,
thank you, we will test what’s going on here in the scope of CADJAVA-10782.

5

any progress on this issue? please let me know

6

@hs.jo,
please, make sure that when using Aspose.CAD for Java (>21.1) you don’t move the API to another package, the API must remain in com.aspose.cad.

7

i didn’t move anything.

just get library from maven repository
(Aspose Repository Browser /java/repo/)

  • pom.xml
    <repository>
        <id>AsposeJavaAPI</id>
        <name>Aspose Java API</name>
        <url>https://repository.aspose.com/repo/</url>
    </repository>
    ...
    <dependency>
        <groupId>com.aspose</groupId>
        <artifactId>aspose-cad</artifactId>
        <version>22.6</version>
    </dependency>
  • java source

import com.aspose.cad.Image;
import com.aspose.cad.fileformats.cad.CadImage;
…
CadImage image = (CadImage) Image.load(sourcePath);
…

this is all i did

8

@hs.jo,
I’m sorry for misunderstanding. Could you please help us further and create empty project with this file and settings you mentioned, so we can run it and see the issue? Thanks.

9

https://drive.google.com/drive/folders/1Y9U39Jog6gTZT5zaIVXDVTECShdsZKHJ?usp=sharing

here’s link for test code

  • AsposeCadTestSpringProject.zip - project folder

  • AsposeCadTestSpringProject-0.0.1-SNAPSHOT.jar - maven package output

  • 6K8DIMS.dxf - sample file

dxf file place at same path with jar and run below

java -jar AsposeCadTestSpringProject-0.0.1-SNAPSHOT.jar

if run command it occurs error i mentioned.

below is all java code in project

package com.test.aspose.asposecadtestspringproject;

import com.aspose.cad.Image;
import com.aspose.cad.fileformats.cad.CadImage;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import java.io.File;

@SpringBootApplication
public class AsposeCadTestSpringProjectApplication {

public static void main(String[] args) {
    String sourcePath = ".\\6K8DIMS.dxf";
    CadImage image = (CadImage) Image.load(sourcePath);
    System.out.println("end");

// SpringApplication.run(AsposeCadTestSpringProjectApplication.class, args);
}

}

1 Like
10

@hs.jo,
thank you, very helpful, working on it.

11

@hs.jo,
Hello. We tested this case and found that Spring Boot Maven re-assembles library so namespaces are changed which is not allowed use case for our product. Probably, you can use something like this JarClassLoader for your case.