java.net.MalformedURLException: no protocol

Question

I' m writing a class to run xjc in java. my code goes as follows:

 URL url = new URL("C:\\Users\\Simran\\Desktop\\books.xsd"); 
 SchemaCompiler sc = XJC.createSchemaCompiler();
 sc.parseSchema(new InputSource(url.toExternalForm()));
 S2JJAXBModel model = sc.bind();
 JCodeModel cm = model.generateCode(null, null);
 cm.build(new FileCodeWriter(new File("C:\\Users\\Simran\\Desktop\\books.xsd")));

however I get the following error when I run this:

Exception in thread "main" java.net.MalformedURLException: no protocol: books.xsd
    at java.net.URL.<init>(Unknown Source)
    at java.net.URL.<init>(Unknown Source)
    at java.net.URL.<init>(Unknown Source)
    at jaxbTest.Test1.main(Test1.java:22)

Can anyone help with this please?

Solution 1

Try append "file://" to the beginning of your file path. But as Bozho proposed, you don't need an URL here.

Solution 2

This is not a valid URL. It can be made valid by prepending file:// as protocol.

But you don't need a URL at all. You can pass a Reader (as well as an InputStream) to the InputSource constructor. So for example:

new InputSource(new FileReader(path))

Comments

[Bozho]

+1, mentioned the file:// protocol while I was adding it to my answer :)

[simran]

can anyone give me some link for using xjc through API calls?

[Kinjal Dixit]

i always thought that it was with three /'s, like file:///, but am upvoting this answer. also the correct term is not appending but prepending.

[Vladimir Ivanov]

oh, please mark some answer as accepted and ask another question. Don't use comments for that.

[Bozho]

thanks for the "prepending". It works with two slashes as well, I'm not sure which is the standard. I guess it gets normalized regardless of the number of slashes.

[nimour pristou]

but in ubuntu ?