org.sormula.reflect

Class FieldExtractor<R>

java.lang.Object

org.sormula.reflect.FieldExtractor<R>

Type Parameters:

R - row type

public class FieldExtractor<R>
extends java.lang.Object

Utility to get field values from a row class as defined by ColumnTranslator. This class is used by cache package classes to get a list of primary key values for use as a CacheKey.

The constructor performs all of the reflection initialization once by creating RowField objects for each desired field. Then getFieldValues(Object) can simply invoke reflection methods to obtain the values for each row as needed.

Since:

3.0

Author:

Jeff Miller

Constructor Summary

Constructors

Constructor and Description
FieldExtractor(AbstractWhereTranslator<R> whereTranslator) Constructs for where translator columns.
FieldExtractor(RowTranslator<R> rowTranslator) Constructs for all fields in row.

Method Summary

Modifier and Type	Method and Description
java.lang.Object[]	getFieldValues(R row) Gets the values of fields for a row.
java.lang.String	toString(R row) Gets field names and values for a row in the form of "field1=value1 field2=value2 field3=value3..." Typically this method is used for debugging.

Methods inherited from class java.lang.Object

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

Constructor Detail

FieldExtractor

public FieldExtractor(AbstractWhereTranslator<R> whereTranslator)
               throws ReflectException

Constructs for where translator columns.

Parameters:

whereTranslator - use fields from this translator

Throws:

ReflectException - if error

Since:

3.4

FieldExtractor

public FieldExtractor(RowTranslator<R> rowTranslator)
               throws ReflectException

Constructs for all fields in row.

Parameters:

rowTranslator - use fields from this translator

Throws:

ReflectException - if error

Since:

3.4

Method Detail

getFieldValues

public java.lang.Object[] getFieldValues(R row)
                                  throws ReflectException

Gets the values of fields for a row.

Parameters:

row - obtain values from this row

Returns:

field values as Object array

Throws:

ReflectException - if error

toString

public java.lang.String toString(R row)
                          throws ReflectException

Gets field names and values for a row in the form of "field1=value1 field2=value2 field3=value3..." Typically this method is used for debugging.

Parameters:

row - extract field values from this row object

Returns:

string of all field names and corresponding values

Throws:

ReflectException - if error

Since:

4.1