org.apache.commons.beanutils.converters
Class AbstractArrayConverter

java.lang.Object
  |
  +--org.apache.commons.beanutils.converters.AbstractArrayConverter
All Implemented Interfaces:
Converter
Direct Known Subclasses:
BooleanArrayConverter, ByteArrayConverter, CharacterArrayConverter, DoubleArrayConverter, FloatArrayConverter, IntegerArrayConverter, LongArrayConverter, ShortArrayConverter, StringArrayConverter

public abstract class AbstractArrayConverter
extends java.lang.Object
implements Converter

Convenience base class for converters that translate the String representation of an array into a corresponding array of primitives object. This class encapsulates the functionality required to parse the String into a list of String elements that can later be individually converted to the appropriate primitive type.

The input syntax accepted by the parseElements() method is designed to be compatible with the syntax used to initialize arrays in a Java source program, except that only String literal values are supported. For maximum flexibility, the surrounding '{' and '}' characters are optional, and individual elements may be separated by any combination of whitespace and comma characters.

Since:
1.4
Version:
$Revision: 1.6 $ $Date: 2004/02/28 13:18:34 $
Author:
Craig R. McClanahan

Field Summary
protected  java.lang.Object defaultValue
          The default value specified to our Constructor, if any.
protected static java.lang.String[] strings
          Model object for string arrays.
protected  boolean useDefault
          Should we return the default value on conversion errors?
 
Constructor Summary
AbstractArrayConverter()
           
 
Method Summary
abstract  java.lang.Object convert(java.lang.Class type, java.lang.Object value)
          Convert the specified input object into an output object of the specified type.
protected  java.util.List parseElements(java.lang.String svalue)
          Parse an incoming String of the form similar to an array initializer in the Java language into a List individual Strings for each element, according to the following rules.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

defaultValue

protected java.lang.Object defaultValue
The default value specified to our Constructor, if any.


strings

protected static java.lang.String[] strings

Model object for string arrays.


useDefault

protected boolean useDefault
Should we return the default value on conversion errors?

Constructor Detail

AbstractArrayConverter

public AbstractArrayConverter()
Method Detail

convert

public abstract java.lang.Object convert(java.lang.Class type,
                                         java.lang.Object value)
Convert the specified input object into an output object of the specified type. This method must be implemented by a concrete subclass.

Specified by:
convert in interface Converter
Parameters:
type - Data type to which this value should be converted
value - The input value to be converted
Throws:
ConversionException - if conversion cannot be performed successfully

parseElements

protected java.util.List parseElements(java.lang.String svalue)

Parse an incoming String of the form similar to an array initializer in the Java language into a List individual Strings for each element, according to the following rules.

Parameters:
svalue - String value to be parsed
Throws:
ConversionException - if the syntax of svalue is not syntactically valid
java.lang.NullPointerException - if svalue is null


Copyright (c) 2001-2004 - Apache Software Foundation