Package weka.knowledgeflow

Class JSONFlowUtils

java.lang.Object

weka.knowledgeflow.JSONFlowUtils

public class JSONFlowUtils
extends Object

Utilities for building and saving flows from JSON data

Author:

Mark Hall

Field Summary

Fields

Modifier and Type	Field	Description
static final String	CLASS
static final String	CONNECTIONS
static final String	COORDINATES
static final String	ENUM_HELPER
static final String	FLOW_NAME
static final String	LOADER
static final String	OPTIONHANDLER
static final String	OPTIONS
static final String	PROPERTIES
static final String	SAVER
static final String	STEPS

Constructor Summary

Constructors

Constructor	Description
JSONFlowUtils()

Method Summary

Modifier and Type	Method	Description
static String	flowToJSON(Flow flow)	Utility routine to serialize a supplied flow to a JSON string
static Flow	JSONToFlow(String flowJSON, boolean dontComplainAboutMissingConnections)	Utility routine to deserialize a flow from the supplied JSON string
static void	main(String[] args)	Main method for testing this class
static Flow	readFlow(File file)	Read a flow from the supplied file
static Flow	readFlow(File file, boolean dontComplainAboutMissingConnections)	Read a flow from the supplied file
static Flow	readFlow(InputStream is)	Read a Flow from the supplied input stream
static Flow	readFlow(InputStream is, boolean dontComplainAboutMissingConnections)	Read a Flow from the supplied input stream
static Flow	readFlow(Reader sr)	Read a flow from the supplied reader
static Flow	readFlow(Reader sr, boolean dontComplainAboutMissingConnections)	Read a flow from the supplied reader
static void	writeFlow(Flow flow, File file)	Serializes the supplied flow to JSON and writes it out to the supplied file
static void	writeFlow(Flow flow, OutputStream os)	Serializes the supplied flow to JSON and writes out using the supplied output stream
static void	writeFlow(Flow flow, Writer writer)	Serializes the supplied flow to JSON and writes out using the supplied writer

Methods inherited from class java.lang.Object

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

Field Details

FLOW_NAME

public static final String FLOW_NAME

See Also:

• Constant Field Values

STEPS

public static final String STEPS

See Also:

• Constant Field Values

OPTIONHANDLER

public static final String OPTIONHANDLER

See Also:

• Constant Field Values

OPTIONS

public static final String OPTIONS

See Also:

• Constant Field Values

LOADER

public static final String LOADER

See Also:

• Constant Field Values

SAVER

public static final String SAVER

See Also:

• Constant Field Values

ENUM_HELPER

public static final String ENUM_HELPER

See Also:

• Constant Field Values

CLASS

public static final String CLASS

See Also:

• Constant Field Values

PROPERTIES

public static final String PROPERTIES

See Also:

• Constant Field Values

CONNECTIONS

public static final String CONNECTIONS

See Also:

• Constant Field Values

COORDINATES

public static final String COORDINATES

See Also:

• Constant Field Values

Constructor Details

JSONFlowUtils

public JSONFlowUtils()

Method Details

writeFlow

public static void writeFlow(Flow flow,
 Writer writer)
                      throws WekaException

Serializes the supplied flow to JSON and writes out using the supplied writer

Parameters:

flow - the Flow to serialize

writer - the Writer to write to

Throws:

WekaException - if a problem occurs

writeFlow

public static void writeFlow(Flow flow,
 OutputStream os)
                      throws WekaException

Serializes the supplied flow to JSON and writes out using the supplied output stream

Parameters:

flow - the Flow to serialize

os - the OutputStream to write to

Throws:

WekaException - if a problem occurs

writeFlow

public static void writeFlow(Flow flow,
 File file)
                      throws WekaException

Serializes the supplied flow to JSON and writes it out to the supplied file

Parameters:

flow - the Flow to serialize

file - the File to write to

Throws:

WekaException - if a problem occurs

readFlow

public static Flow readFlow(File file)
                     throws WekaException

Read a flow from the supplied file

Parameters:

file - the file to read from

Returns:

the deserialized Flow

Throws:

WekaException - if a problem occurs

readFlow

public static Flow readFlow(File file,
 boolean dontComplainAboutMissingConnections)
                     throws WekaException

Read a flow from the supplied file

Parameters:

file - the file to read from

dontComplainAboutMissingConnections - true if no exceptions should be raised if connections are missing in the flow

Returns:

the deserialized Flow

Throws:

WekaException - if a problem occurs

readFlow

public static Flow readFlow(InputStream is)
                     throws WekaException

Read a Flow from the supplied input stream

Parameters:

is - the InputStream to read from

Returns:

the deserialized flow

Throws:

WekaException - if a problem occurs

readFlow

public static Flow readFlow(InputStream is,
 boolean dontComplainAboutMissingConnections)
                     throws WekaException

Read a Flow from the supplied input stream

Parameters:

is - the InputStream to read from

dontComplainAboutMissingConnections - true if no exception should be raised if there are missing connections

Returns:

the deserialized flow

Throws:

WekaException - if a problem occurs

readFlow

public static Flow readFlow(Reader sr)
                     throws WekaException

Read a flow from the supplied reader

Parameters:

sr - the reader to read from

Returns:

the deserialized flow

Throws:

WekaException - if a problem occurs

readFlow

public static Flow readFlow(Reader sr,
 boolean dontComplainAboutMissingConnections)
                     throws WekaException

Read a flow from the supplied reader

Parameters:

sr - the reader to read from

dontComplainAboutMissingConnections - true if no exception should be raised if there are missing connections

Returns:

the deserialized flow

Throws:

WekaException - if a problem occurs

JSONToFlow

public static Flow JSONToFlow(String flowJSON,
 boolean dontComplainAboutMissingConnections)
                       throws WekaException

Utility routine to deserialize a flow from the supplied JSON string

Parameters:

flowJSON - the string containing a flow in JSON form

dontComplainAboutMissingConnections - to not raise any exceptions if there are missing connections in the flow

Returns:

the deserialized flow

Throws:

WekaException - if a problem occurs

flowToJSON

public static String flowToJSON(Flow flow)
                         throws WekaException

Utility routine to serialize a supplied flow to a JSON string

Parameters:

flow - the flow to serialize

Returns:

a string containing the flow in JSON form

Throws:

WekaException - if a problem occurs

main

public static void main(String[] args)

Main method for testing this class

Parameters:

args - command line arguments