Unable to compile annotations like @Entity using JavaCompiler

Question

I am using JavaCompiler to compile Java code at runtime. For most part, it works well. There are no exceptions during compiling, it works well. I require it to compile a class with @Entity annotation. However, I keep getting "Error in line 3 - class, interface, or enum expected".

This is my entity class:

@Entity
public class Contact {
    @Getter @Setter
    private String FirstName;

    @Getter @Setter
    private String LastName;
}

This is how I am using JavaCompiler to compile it:

List<String> optionList = new ArrayList<String>();
            optionList.add("-classpath");
            optionList.add(System.getProperty("java.class.path"));

Iterable<? extends JavaFileObject> compilationUnit
                    = fileManager.getJavaFileObjectsFromFiles(Arrays.asList(newClassFile));
JavaCompiler.CompilationTask task = compiler.getTask(
                    null,
                    fileManager,
                    diagnostics,
                    optionList,
                    null,
                    compilationUnit);

Please read minimal reproducible example and enhance your question accordingly. As in: add an example class that fails compilation. — GhostCat
– GhostCat, Commented May 4, 2019 at 17:30
Possible duplicate of Do annotations in Java result in compile-time transitive dependencies? — Dupinder Singh
– Dupinder Singh, Commented May 4, 2019 at 18:06

Vicrum · Accepted Answer · 2019-05-05 04:58:24Z

0

Solved. Looks like I just had to add the persistence api jar while building.

answered May 5, 2019 at 4:58

Vicrum

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