Schema with required[""] results in String index out of range: 0

[richardwalsh]

Example file:

{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "title": "Silly",
    "type":"object",
    "description":"silly example",
    "required": [""],
    "properties": {
        "code" : {
            "type":"string",
            "description":"blah blah blah"
        }
    }
}

maven plugin error:

Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: 0
	at java.lang.String.charAt(String.java:658)
	at org.jsonschema2pojo.util.NameHelper.normalizeName(NameHelper.java:45)
	at org.jsonschema2pojo.util.NameHelper.getPropertyName(NameHelper.java:74)
	at org.jsonschema2pojo.rules.RequiredArrayRule.apply(RequiredArrayRule.java:54)
	at org.jsonschema2pojo.rules.RequiredArrayRule.apply(RequiredArrayRule.java:39)
	at org.jsonschema2pojo.rules.ObjectRule.apply(ObjectRule.java:134)
	at org.jsonschema2pojo.rules.ObjectRule.apply(ObjectRule.java:64)
	at org.jsonschema2pojo.rules.TypeRule.apply(TypeRule.java:85)
	at org.jsonschema2pojo.rules.TypeRule.apply(TypeRule.java:35)
	at org.jsonschema2pojo.rules.SchemaRule.apply(SchemaRule.java:73)
	at org.jsonschema2pojo.rules.SchemaRule.apply(SchemaRule.java:66)
	at org.jsonschema2pojo.rules.SchemaRule.apply(SchemaRule.java:30)
	at org.jsonschema2pojo.SchemaMapper.generate(SchemaMapper.java:88)
	at org.jsonschema2pojo.Jsonschema2Pojo.generateRecursive(Jsonschema2Pojo.java:116)
	at org.jsonschema2pojo.Jsonschema2Pojo.generateRecursive(Jsonschema2Pojo.java:118)
	at org.jsonschema2pojo.Jsonschema2Pojo.generate(Jsonschema2Pojo.java:74)
	at org.jsonschema2pojo.maven.Jsonschema2PojoMojo.execute(Jsonschema2PojoMojo.java:494)
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:106)

Notes:

1. I upgraded my pom to use the latest maven plugin version (0.4.34) from 0.4.7 and the error started showing up. I narrowed it down to 0.4.12 works fine but then fails in version 0.4.13.

2. Yes, required[""] is pointless, I inherited the schema and don't know the history behind it. The easy workaround is simply removing the "required" and everything is fine.

Thanks,
Rich

[joelittlejohn]

Thanks for reporting this. An easy one to fix I expect and nice to make the plugin less fragile if we can.

[joelittlejohn]

Fixed by #733