package com.facebook.presto.jdbc.internal.jackson.databind.jsonschema;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonCreator;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonValue;
import com.facebook.presto.jdbc.internal.jackson.databind.JsonNode;
import com.facebook.presto.jdbc.internal.jackson.databind.node.JsonNodeFactory;
import com.facebook.presto.jdbc.internal.jackson.databind.node.ObjectNode;
/**
* Container for a logical JSON Schema instance.
* Internally schema data is stored as a JSON Tree
* (instance of {@link JsonNode} is the root
* of schema document)
*
* @author Ryan Heaton
* @see <a href="http://json-schema.org/">JSON Schema</a>
*/
public class JsonSchema
{
private final ObjectNode schema;
/**
* Main constructor for schema instances.
*<p>
* This is the creator constructor used by Jackson itself when
* deserializing instances. It is so-called delegating creator,
* meaning that its argument will be bound by Jackson before
* constructor gets called.
*/
@JsonCreator
public JsonSchema(ObjectNode schema)
{
this.schema = schema;
}
/**
* Method for accessing root JSON object of the contained schema.
*<p>
* Note: this method is specified with {@link JsonValue} annotation
* to represent serialization to use; same as if explicitly
* serializing returned object.
*
* @return Root node of the schema tree
*/
@JsonValue
public ObjectNode getSchemaNode()
{
return schema;
}
@Override
public String toString()
{
return this.schema.toString();
}
@Override
public boolean equals(Object o)
{
if (o == this) return true;
if (o == null) return false;
if (!(o instanceof JsonSchema)) return false;
JsonSchema other = (JsonSchema) o;
if (schema == null) {
return other.schema == null;
}
return schema.equals(other.schema);
}
/**
* Get the default schema node.
*
* @return The default schema node.
*/
public static JsonNode getDefaultSchemaNode()
{
ObjectNode objectNode = JsonNodeFactory.instance.objectNode();
objectNode.put("type", "any");
// "required" is false by default, no need to include
//objectNode.put("required", false);
return objectNode;
}
}