org.qore.lang.mapper.Mapper Class Reference

Inherits QoreObjectWrapper.

Public Member Methods
	Mapper (QoreObject obj)
Object	getRuntime (String key) throws Throwable
String	getFieldName (String fname) throws Throwable
HashMap< String, Object >	validKeys () throws Throwable
HashMap< String, Object >	validTypes () throws Throwable
HashMap< String, Object >	optionKeys () throws Throwable
HashMap< String, Object >	getInputRecord () throws Throwable
HashMap< String, Object >	getOutputRecord () throws Throwable
MapperOutputRecordIterator	getOutputIterator () throws Throwable
void	commit () throws Throwable
void	rollback () throws Throwable
void	flushOutput () throws Throwable
void	discardOutput () throws Throwable
void	runAutonomous () throws Throwable
HashMap< String, Object >[]	mapAll (Map< String, Object >[] recs) throws Throwable
HashMap< String, Object >[]	mapAll (Map< String, Object > recs) throws Throwable
HashMap< String, Object >	mapData (Map< String, Object > rec) throws Throwable
Object	mapAuto (Object recs) throws Throwable
Hash	mapBulk (Map< String, Object > rec, Map< String, Object > crec) throws Throwable

Detailed Description

Java wrapper for the

See also

Mapper::Mapper class in Qore

Note

Loads and initializes the Qore library and the jni module in static initialization if necessary

Deprecated:

Use dynamic imports instead: import qoremod.Mapper.Mapper;

Constructor & Destructor Documentation

Mapper()

org.qore.lang.mapper.Mapper.Mapper ( QoreObject  obj )

inline

creates the object as a wrapper for the Qore object

Parameters

obj	the Qore object

Member Function Documentation

commit()

void org.qore.lang.mapper.Mapper.commit ( ) throws Throwable

inline

Commits data written to the output data provider if the output data provider supports transaction management Has no effect if the output data provider does not support transaction management

Exceptions

MAPPER-OUTPUT-PROVIDER-ERROR

no output provider available in this mapper

discardOutput()

void org.qore.lang.mapper.Mapper.discardOutput ( ) throws Throwable

inline

Discards any buffered data This method should always be called if an error occurs in a bulk output operation

Exceptions

MAPPER-OUTPUT-BULK-ERROR

no output bulk operation is in progress

flushOutput()

void org.qore.lang.mapper.Mapper.flushOutput ( ) throws Throwable

inline

Flushes any remaining data to the data provider This method should always be called for successful bulk output operations with an output provider

Exceptions

MAPPER-OUTPUT-BULK-ERROR

no output bulk operation is in progress

getFieldName()

String org.qore.lang.mapper.Mapper.getFieldName ( String  fname ) throws Throwable

inline

Parameters

fname

the field

Returns

a descriptive name of the given field if possible, otherwise returns the field name itself

getInputRecord()

HashMap< String, Object > org.qore.lang.mapper.Mapper.getInputRecord ( ) throws Throwable

inline

Note

null is returned if no input record is set

Returns

the value of the "input" option

getOutputIterator()

MapperOutputRecordIterator org.qore.lang.mapper.Mapper.getOutputIterator ( ) throws Throwable

inline

Returns

an output record iterator that produces mapped data from the input data provider

Exceptions

MAPPER-INPUT-PROVIDER-ERROR

if no input_provider option was provided in the constructor or the input provider uses the request/response API

getOutputRecord()

HashMap< String, Object > org.qore.lang.mapper.Mapper.getOutputRecord ( ) throws Throwable

inline

Note

null is returned if no output record is set

Returns

the value of the "output" option

getRuntime()

Object org.qore.lang.mapper.Mapper.getRuntime ( String  key ) throws Throwable

inline

get current

See also

mapper_runtime_handling "runtime option" value for a key

Parameters

key	the runtime option key

Returns

a runtime value if the key exists in the current

See also

mapper_runtime_handling "runtime option hash" and is set

mapper_runtime_handling

Since

Mapper 1.1

mapAll() [1/2]

HashMap< String, Object >[] org.qore.lang.mapper.Mapper.mapAll ( Map< String, Object >  recs ) throws Throwable

inline

maps all input records and returns the mapped data as a list of output records this method applies the

See also

mapData() method to all input records and returns the resulting list

Parameters

recs	a Map<String, Object> of lists of input records

Returns

the mapped data as a list of output records

Exceptions

MISSING-INPUT	a field marked mandatory is missing
STRING-TOO-LONG	a field value exceeds the maximum value and the 'trunc' key is not set
INVALID-NUMBER	the field is marked as numeric but the input value contains non-numeric data

mapAll() [2/2]

HashMap< String, Object >[] org.qore.lang.mapper.Mapper.mapAll ( Map< String, Object >[]  recs ) throws Throwable

inline

maps all input records and returns the mapped data as a list of output records this method applies the

See also

mapData() method to all input records and returns the resulting list

Parameters

recs	the list of input records

Returns

the mapped data as a list of output records

Exceptions

MISSING-INPUT	a field marked mandatory is missing
STRING-TOO-LONG	a field value exceeds the maximum value and the 'trunc' key is not set
INVALID-NUMBER	the field is marked as numeric but the input value contains non-numeric data

mapAuto()

Object org.qore.lang.mapper.Mapper.mapAuto ( Object  recs ) throws Throwable

inline

maps all input record(s) automatically and returns the mapped data this method applies the

See also

mapAll() method if the input records are given as list and the

mapBulk() method if the input is a Map<String, Object> of lists. For a simple Map<String, Object> (one record) it calls the

mapData() method.

Parameters

recs	input records (one record or more), can be represented by list or Map<String, Object>

Returns

the mapped data as of output records (type depends on the given records' type)

Exceptions

MISSING-INPUT	a field marked mandatory is missing
STRING-TOO-LONG	a field value exceeds the maximum value and the 'trunc' key is not set
INVALID-NUMBER	the field is marked as numeric but the input value contains non-numeric data
MAPPER-INPUT-TYPE-ERROR	records input type is not acceptable

Since

Mapper 1.6

mapBulk()

Hash org.qore.lang.mapper.Mapper.mapBulk ( Map< String, Object >  rec, Map< String, Object >  crec  ) throws Throwable

inline

maps a set of records in Map<String, Object> of lists format; returns mapped data in a Hash of lists format

Example:

Hash output = mapper.mapBulk(h);

Parameters

rec	the input record or record set in case a Map<String, Object> of lists is passed
crec	an optional Map<String, Object> of data to be added to each input row before mapping

Returns

returns a Hash of lists of mapped data

Note

• using a Map<String, Object> of lists in rec; note that this provides very high performance when used with data provider output that support bulk write operations
• in case a Map<String, Object> of empty lists is passed, null is returned
• 'crec' does not affect the number of output lines; in particular, if 'rec' is a batch with N rows of a column C and 'crec = {"C": "mystring"}' then the output will be as if there was 'N' rows with C = "mystring" on the input.

See also

• flushOutput()
• discardOutput()

Exceptions

MISSING-INPUT	a field marked mandatory is missing
STRING-TOO-LONG	a field value exceeds the maximum value and the 'trunc' key is not set
INVALID-NUMBER	the field is marked as numeric but the input value contains non-numeric data

mapData()

HashMap< String, Object > org.qore.lang.mapper.Mapper.mapData ( Map< String, Object >  rec ) throws Throwable

inline

processes the input record and returns a Map<String, Object> of the mapped values where the keys in the Map<String, Object> returned are the target field names; the order of the fields in the Map<String, Object> returned is the same order as the keys in the map hash.

Parameters

rec	the record to translate

Returns

a Map<String, Object> of field values in the target format based on the input data and processed according to the logic in the map hash

Exceptions

MISSING-INPUT	a field marked mandatory is missing
STRING-TOO-LONG	a field value exceeds the maximum value and the 'trunc' key is not set
INVALID-NUMBER	the field is marked as numeric but the input value contains non-numeric data

Note

• each time this method is executed successfully, the record count is updated (see

See also

getCount() and

resetCount())

• uses

Mapper::Mapper::mapDataIntern() to map the data, then

Mapper::Mapper::logOutput() is called for each output row

optionKeys()

HashMap< String, Object > org.qore.lang.mapper.Mapper.optionKeys ( ) throws Throwable

inline

Returns

a list of valid constructor options for this class (can be overridden in subclasses)

rollback()

void org.qore.lang.mapper.Mapper.rollback ( ) throws Throwable

inline

Rolls back data written to the output data provider Has no effect if the output data provider does not support transaction management

Exceptions

MAPPER-OUTPUT-PROVIDER-ERROR

no output provider available in this mapper

runAutonomous()

void org.qore.lang.mapper.Mapper.runAutonomous ( ) throws Throwable

inline

Runs the input and output mappers with data providers on each end autonomously

Exceptions

MAPPER-INPUT-PROVIDER-ERROR	no input provider available in this mapper
MAPPER-OUTPUT-PROVIDER-ERROR	no output provider available in this mapper

validKeys()

HashMap< String, Object > org.qore.lang.mapper.Mapper.validKeys ( ) throws Throwable

inline

Returns

a list of valid field keys for this class (can be overridden in subclasses)

validTypes()

HashMap< String, Object > org.qore.lang.mapper.Mapper.validTypes ( ) throws Throwable

inline

Returns

a list of valid types for this class (can be overridden in subclasses)

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The documentation for this class was generated from the following file:

• /tmp/module-jni/src/java/org/qore/lang/mapper/Mapper.java