Package com.ibm.di.fc

Class ParserFC

java.lang.Object

com.ibm.di.fc.Function

com.ibm.di.fc.ParserFC

All Implemented Interfaces:

FunctionInterface, VersionInfoInterface

public class ParserFC
extends Function

This is a function component that wraps parser operations. The configured parser is used in read/write mode depending on the type of object passed to this FC. If the passed type is an com.ibm.di.entry.Entry object, the write operation is used, otherwise the function will try to coerce the input param to an input stream in order to use the parser read operation. system.getFC("ibmdi.ParserFC").perform (new Entry()); // Returns the encoded string/byte array system.getFC("ibmdi.ParserFC").perform (file|string|inputstream|reader); // Returns the parsed entry

Field Summary

Fields inherited from class com.ibm.di.fc.Function

logger

Constructor Summary

Constructors

Constructor	Description
ParserFC()

Method Summary

Modifier and Type	Method	Description
ParserInterface	getParser()	This method provides access to the ParserInterface implementation used internally.
java.lang.String	getVersion()	Version information.
java.lang.Object	perform(java.lang.Object obj)	If this method is called with an object of type java.lang.String, java.io.File, java.io.InputStream or java.io.Reader the configured parser is provided that object as input and the returned value is an Entry object resulting from the parsing.
java.lang.Object	querySchema(java.lang.Object o)	This method queries the schema for this ParserFC.
Entry	readEntry(java.lang.Object param)	Returns the entry from the parser read operation
void	setDebug(boolean debug)	Modify the debug mode setting of this component.
void	terminate()	Closes the parser
boolean	updateSchema(FunctionConfig config)	This method modifies the schema in the provided configuration.
java.lang.Object	writeEntry(java.lang.Object obj)	Returns the string or byte array from the parser write operation

Methods inherited from class com.ibm.di.fc.Function

debug, getConfiguration, getContext, getDebug, getLog, getParam, getRSInterface, getUI, initialize, initialize, logmsg, setConfiguration, setContext, setLog, setParam, setRSInterface, verifyInitialized

Methods inherited from class java.lang.Object

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

Constructor Detail

ParserFC

public ParserFC()

Method Detail

perform

public java.lang.Object perform(java.lang.Object obj)
                         throws java.lang.Exception

If this method is called with an object of type java.lang.String, java.io.File, java.io.InputStream or java.io.Reader the configured parser is provided that object as input and the returned value is an Entry object resulting from the parsing. If this method is called with an Entry object, the parser is used to generate a byte stream that is returned either as a byte array or java.lang.String object. The latter depends on the configuration switch "returnString" setting. Depending on the value of the "mode" configuration parameter this method calls either readEntry or writeEntry method of the Parser.

Parameters:

obj - the input object for the function

Returns:

the output object for the function

Throws:

java.lang.Exception - An exception is thrown if this method fails.

writeEntry

public java.lang.Object writeEntry(java.lang.Object obj)
                            throws java.lang.Exception

Returns the string or byte array from the parser write operation

Parameters:

obj - The entry object to encode

Returns:

The string or byte array value resulting from the operation

Throws:

java.lang.Exception - Any exception thrown by the parser

readEntry

public Entry readEntry(java.lang.Object param)
                throws java.lang.Exception

Returns the entry from the parser read operation

Parameters:

param - The parser input object

Returns:

The entry resulting from the parser read operation

Throws:

java.lang.Exception - Any exception thrown by the parser

updateSchema

public boolean updateSchema(FunctionConfig config)
                     throws java.lang.Exception

This method modifies the schema in the provided configuration. The intent is to allow the FC to provide a schema definition dynamically based on a given configuration.

Specified by:

updateSchema in interface FunctionInterface

Overrides:

updateSchema in class Function

Parameters:

config - FunctionConfig

Returns:

boolean

Throws:

java.lang.Exception - : never

querySchema

public java.lang.Object querySchema(java.lang.Object o)
                             throws java.lang.Exception

This method queries the schema for this ParserFC.

Specified by:

querySchema in interface FunctionInterface

Overrides:

querySchema in class Function

Parameters:

o - Boolean.TRUE for inputschema, Boolean.FALSE for outputschema

Returns:

a Vector of Entry objects or null if no schema found

Throws:

java.lang.Exception - : if the parser fails to load

See Also:

Entry, Vector

getParser

public ParserInterface getParser()

This method provides access to the ParserInterface implementation used internally.

Returns:

the parser this FC uses for handling user requests or null if the parser have not been loaded yet.

getVersion

public java.lang.String getVersion()

Version information.

Returns:

version information.

terminate

public void terminate()
               throws java.lang.Exception

Closes the parser

Specified by:

terminate in interface FunctionInterface

Overrides:

terminate in class Function

Throws:

java.lang.Exception - An exception is thrown if this method fails.

setDebug

public void setDebug(boolean debug)

Modify the debug mode setting of this component. May be called by different threads.

This method is for internal use only. Do not call it from user code.

Overrides:

setDebug in class Function

Parameters:

debug - the debug mode setting