How to create JSON Schema for Name/Value structure?

Question

My problem is that i am serializing the content of map to JSON.

In the output (JSON), i have object that follow key/name syntax rule.

The key is created from map key, and the name from the value.

Model Example:

  class Storage {        Map<String,String> values = new HashMap<>();        {          map.put("key1","key1");          map.put("key2","key2");          map.put("key3","key3");       }      } 

JSON Example object:

{   key1=value1,   key2=value2,   key3=value3 } 

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JSON Schema:

{   "name": "storage",   "description": "Store of key values",   "properties": {     // How can we describe the properties if we do not know the name ?    } } 

The issue is that i do not know what the values will be but i know that they will be some.

Can you help me to provide me the full definition of schema?

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Disclaimer:

I know that this can be also serialized as

 {     values: [        {key="key1", value="value1"},        {key="key2", value="value2"},        {key="key3", value="value3"}     ]  } 

but is do not want to have array in the JSON.

Answer 1

Assuming your validator supports it you can use patternProperties.

For the schema...

{   "title": "Map<String,String>",   "type": "object",   "patternProperties": {     ".{1,}": { "type": "string" }   } } 

...and the document...

{     "foo":"bar",     "baz":1 } 

...the value of property foo is valid because it is a string but baz fails validation because it is a number.