.getSchema() will stack overflow on recursive definitions.

[juiposa]

With v0.1.13

I have a schema file with an recursive object, i.e. a parent object that can have a child object with the same schema.

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "properties": {
    "parent": {
      "$ref": "#/definitions/objectDef"
    }
  }
},
"definitions": {
  "objectDef": {
    "type": "object",
    "properties": {
      "value1": {
        "type": "string"
      },
      "value2": {
        "type": "string"
      },
      "childObject": {
        "$ref": "#/definitions/objectDef"
      }
    }
  }
}

It seems to not like this, as when I attempt to call schemaFactory.getSchema(node), it errors out with a stack overflow

com.networknt.schema.JsonSchemaException: java.lang.StackOverflowError
at com.networknt.schema.JsonMetaSchema.newValidator(JsonMetaSchema.java:247)
at com.networknt.schema.ValidationContext.newValidator(ValidationContext.java:24)
at com.networknt.schema.JsonSchema.read(JsonSchema.java:116)
at com.networknt.schema.JsonSchema.<init>(JsonSchema.java:56)
at com.networknt.schema.JsonSchema.<init>(JsonSchema.java:49)
at com.networknt.schema.AnyOfValidator.<init>(AnyOfValidator.java:38)
at sun.reflect.GeneratedConstructorAccessor8.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.networknt.schema.ValidatorTypeCode.newValidator(ValidatorTypeCode.java:102)
...
Cause: java.lang.StackOverflowError:
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

I updated to v0.1.13 today from v0.1.7, where it returned the JsonSchema object for the above schema without issue.

[stevehu]

I think one of the contributors has fixed this issue in #36

Thanks a lot for your confirmation. This is how community works:)