Package org.bremersee.comparator

Class DefaultValueExtractor

java.lang.Object

org.bremersee.comparator.DefaultValueExtractor

All Implemented Interfaces:

ValueExtractor

public class DefaultValueExtractor
extends Object
implements ValueExtractor

The default value extractor supports field names and paths as described in SortOrder. A field name can be just the field name (for example firstName), a method name, that is not generated by ValueExtractor.getPossibleMethodNames(String) (for example toString) or a path of field names separated by dots (.), for example person.firstName.

Author:

Christian Bremer

Constructor Summary

Constructors

Constructor	Description
DefaultValueExtractor()	Instantiates a new default value extractor that will throw ValueExtractorException, if the given field cannot be found.
DefaultValueExtractor(boolean throwingException)	Instantiates a new default value extractor.

Method Summary

Modifier and Type	Method	Description
Object	findValue(Object obj, String fieldPath)	Find the value of the given add name or path of the given object.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.bremersee.comparator.ValueExtractor

findField, findField, findMethod, findMethod, getPossibleMethodNames, invoke, invoke

Constructor Details

DefaultValueExtractor

public DefaultValueExtractor()

Instantiates a new default value extractor that will throw ValueExtractorException, if the given field cannot be found.

DefaultValueExtractor

public DefaultValueExtractor(boolean throwingException)

Instantiates a new default value extractor.

Parameters:

throwingException - if true and the given field cannot be found, ValueExtractorException will be thrown; otherwise null will be returned

Method Details

findValue

public Object findValue(Object obj,
 String fieldPath)

Description copied from interface: ValueExtractor

Find the value of the given add name or path of the given object.

Specified by:

findValue in interface ValueExtractor

Parameters:

obj - the object

fieldPath - the field name or path

Returns:

the object