org.apache.ambari.server.state.kerberos

Class KerberosDescriptorFactory

java.lang.Object

org.apache.ambari.server.state.kerberos.KerberosDescriptorFactory

public class KerberosDescriptorFactory
extends Object

KerberosDescriptorFactory is a factory class used to create KerberosDescriptor instances using various sources of data.

Constructor Summary

Constructors

Constructor and Description
KerberosDescriptorFactory()

Method Summary

Modifier and Type	Method and Description
KerberosDescriptor	createInstance(File file) Given a file containing JSON-formatted text, attempts to create a KerberosDescriptor
KerberosDescriptor	createInstance(Map<?,?> map) Creates a new KerberosDescriptor See KerberosDescriptor for the JSON Schema that may be used to generate this map.
KerberosDescriptor	createInstance(String json) Given a String containing JSON-formatted text, attempts to create a KerberosDescriptor
protected Map<String,Object>	parseFile(File file) Parses a file containing JSON-formatted text into a (generic) Map.
protected Map<String,Object>	parseJSON(String json) Parses a JSON-formatted String into a (generic) Map.

Methods inherited from class java.lang.Object

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

Constructor Detail

KerberosDescriptorFactory

public KerberosDescriptorFactory()

Method Detail

createInstance

public KerberosDescriptor createInstance(File file)
                                  throws IOException

Given a file containing JSON-formatted text, attempts to create a KerberosDescriptor

Parameters:

file - a File pointing to the file containing JSON-formatted text

Returns:

a newly created KerberosDescriptor

Throws:

FileNotFoundException - if the specified File does not point to a valid file

IOException - if the specified File is not a readable file

org.apache.ambari.server.AmbariException - if the specified File does not contain valid JSON data

createInstance

public KerberosDescriptor createInstance(String json)
                                  throws org.apache.ambari.server.AmbariException

Given a String containing JSON-formatted text, attempts to create a KerberosDescriptor

Parameters:

json - a File pointing to the file containing JSON-formatted text

Returns:

a newly created KerberosDescriptor

Throws:

org.apache.ambari.server.AmbariException - if an error occurs while processing the JSON-formatted String

createInstance

public KerberosDescriptor createInstance(Map<?,?> map)

Creates a new KerberosDescriptor

See KerberosDescriptor for the JSON Schema that may be used to generate this map.

Parameters:

map - a Map of values use to populate the data for the new instance

See Also:

KerberosDescriptor

parseFile

protected Map<String,Object> parseFile(File file)
                                throws IOException

Parses a file containing JSON-formatted text into a (generic) Map.

Parameters:

file - a File containing the JSON-formatted text to parse

Returns:

a Map of the data

Throws:

FileNotFoundException - if the specified File does not point to a valid file

IOException - if the specified File is not a readable file

org.apache.ambari.server.AmbariException - if the specified File does not contain valid JSON data

parseJSON

protected Map<String,Object> parseJSON(String json)
                                throws org.apache.ambari.server.AmbariException

Parses a JSON-formatted String into a (generic) Map.

Parameters:

json - a String containing the JSON-formatted text to parse

Returns:

a Map of the data

Throws:

org.apache.ambari.server.AmbariException - if an error occurs while parsing the JSON-formatted String