Package org.apache.curator.framework.schema

Class SchemaSetLoader

java.lang.Object

org.apache.curator.framework.schema.SchemaSetLoader

public class SchemaSetLoader
extends Object

Utility to load schems set from a JSON stream/file. NOTE: to avoid adding a new dependency to Curator, the Jackson library has been used with "provided" scope. You will need to add a dependency to com.fasterxml.jackson.core:jackson-core:2.7.3 and com.fasterxml.jackson.core:jackson-databind:2.7.3 to your project

The JSON stream should be an array of named schemas:

 [
     {
         "name": "name",                       required - name of the schema
         "path": "path or pattern",            required - full path or regex pattern
         "isRegex": true/false,                optional - true if path is a regular expression - default is false
         "schemaValidator": "name",            optional - name of a schema validator - default is no validator
         "documentation": "docs",              optional - user displayable docs - default is ""
         "ephemeral": "allowance",             optional - "can", "must" or "cannot" - default is "can"
         "sequential": "allowance",            optional - "can", "must" or "cannot" - default is "can"
         "watched": "allowance",               optional - "can", "must" or "cannot" - default is "can"
         "canBeDeleted": true/false            optional - true if ZNode at path can be deleted - default is true
         "metadata": {                         optional - any fields -> values that you want
             "field1": "value1",
             "field2": "value2"
         }
     }
 ]
 

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	SchemaSetLoader.SchemaValidatorMapper	Called to map a schema validator name in the JSON stream to an actual data validator

Constructor Summary

Constructors

Constructor	Description
SchemaSetLoader(com.fasterxml.jackson.databind.JsonNode root, SchemaSetLoader.SchemaValidatorMapper schemaValidatorMapper)
SchemaSetLoader(Reader jsonStream, SchemaSetLoader.SchemaValidatorMapper schemaValidatorMapper)
SchemaSetLoader(String json, SchemaSetLoader.SchemaValidatorMapper schemaValidatorMapper)

Method Summary

Modifier and Type	Method	Description
List<Schema>	getSchemas()
SchemaSet	toSchemaSet(boolean useDefaultSchema)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SchemaSetLoader

public SchemaSetLoader(String json,
 SchemaSetLoader.SchemaValidatorMapper schemaValidatorMapper)

Parameters:

json - the json to parse

schemaValidatorMapper - mapper from validator name to instance - can be null if not needed

SchemaSetLoader

public SchemaSetLoader(Reader jsonStream,
 SchemaSetLoader.SchemaValidatorMapper schemaValidatorMapper)

Parameters:

jsonStream - the json stream to parse

schemaValidatorMapper - mapper from validator name to instance - can be null if not needed

SchemaSetLoader

public SchemaSetLoader(com.fasterxml.jackson.databind.JsonNode root,
 SchemaSetLoader.SchemaValidatorMapper schemaValidatorMapper)

Parameters:

root - a Jackson root node

schemaValidatorMapper - mapper from validator name to instance - can be null if not needed

Method Details

toSchemaSet

public SchemaSet toSchemaSet(boolean useDefaultSchema)

Parameters:

useDefaultSchema - if true, return a default schema when there is no match. Otherwise, an exception is thrown

Returns:

schema set

getSchemas

public List<Schema> getSchemas()