SwaggerCompatConverter does not parse local file correctly

For some reason, I am using swagger 1.2 to specify my api. And when I use swagger-parser to parse my resource list file in the local machine, I get the following error:

[main] ERROR io.swagger.parser.SwaggerCompatConverter - failed to read api declaration         
java.io.FileNotFoundException: null/https:/github.com/openalto/alto-swagger/raw/spec/api/ext/1.2/query.json (No such file or directory)                                                       
        at java.io.FileInputStream.open0(Native Method)                                        
        at java.io.FileInputStream.open(FileInputStream.java:195)                              
        at java.io.FileInputStream.<init>(FileInputStream.java:138)                            
        at com.fasterxml.jackson.core.JsonFactory.createParser(JsonFactory.java:756)           
        at com.fasterxml.jackson.databind.ObjectMapper.readTree(ObjectMapper.java:2447)        
        at io.swagger.parser.SwaggerCompatConverter.readDeclaration(SwaggerCompatConverter.java:490)                                                                                          
        at io.swagger.parser.SwaggerCompatConverter.read(SwaggerCompatConverter.java:169)      
        at io.swagger.parser.SwaggerCompatConverter.readWithInfo(SwaggerCompatConverter.java:87)                                                                                              
        at io.swagger.parser.SwaggerParser.readWithInfo(SwaggerParser.java:41)                 
        at io.swagger.codegen.cmd.Validate.run(Validate.java:25)                               
        at io.swagger.codegen.SwaggerCodegen.main(SwaggerCodegen.java:35)

My resource list file is like following:

{
  "swaggerVersion": "1.2",
  "apiVersion": "0.1.1-oas1.2",
  "info": {
    "title": "Unicorn API",
    "description": "Cross-domain path and resource discovery"
  },
  "apis": [
    {
      "path": "https://github.com/openalto/alto-swagger/raw/spec/api/ext/1.2/query.json",
      "description": "Operations about path query and resource query"
    }
  ]
}

I think here (SwaggerCompatConverter.java#L139) is the reason. The legacy swagger parser will parse api path as the remote url only when the input resource list file is also a remote url. I think it is not the right way.

Can we fix this issue?

Start in modules/swagger-compat-spec-parser/src/main/java/io/swagger/parser/SwaggerCompatConverter.java, especially the logic around line 139 and readDeclaration at line 490. Reproduce the failure with a local Swagger 1.2 resource list whose API path is the remote URL. Done means the local file correctly resolves that remote API declaration without producing a null-prefixed path.