org.apache.commons.beanutils.converters
Class AbstractArrayConverter
java.lang.Object
org.apache.commons.beanutils.converters.AbstractArrayConverter
- Converter
public abstract class AbstractArrayConverter
extends java.lang.Object
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.
$Revision: 557808 $ $Date: 2007-07-20 00:05:03 +0100 (Fri, 20 Jul 2007) $static Object | NO_DEFAULT - This is a special reference that can be passed as the "default object"
to the constructor to indicate that no default is desired.
|
protected Object | defaultValue - The default value specified to our Constructor, if any.
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protected static String[] | strings - Model object for string arrays.
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protected boolean | useDefault - Should we return the default value on conversion errors?
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abstract Object | convert(Class type, Object value) - Convert the specified input object into an output object of the
specified type.
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protected List | parseElements(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.
|
NO_DEFAULT
public static final Object NO_DEFAULT
This is a special reference that can be passed as the "default object"
to the constructor to indicate that no default is desired. Note that
the value 'null' cannot be used for this purpose, as the caller may
want a null to be returned as the default.
defaultValue
protected Object defaultValue
The default value specified to our Constructor, if any.
strings
protected static String[] strings
Model object for string arrays.
useDefault
protected boolean useDefault
Should we return the default value on conversion errors?
AbstractArrayConverter
public AbstractArrayConverter()
AbstractArrayConverter
public AbstractArrayConverter(Object defaultValue)
Create a
Converter
that will return the specified default value
if a conversion error occurs.
defaultValue
- The default value to be returned
convert
public abstract Object convert(Class type,
Object value)
Convert the specified input object into an output object of the
specified type. This method must be implemented by a concrete
subclass.
- convert in interface Converter
type
- Data type to which this value should be convertedvalue
- The input value to be converted
parseElements
protected List parseElements(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.
- The string is expected to be a comma-separated list of values.
- The string may optionally have matching '{' and '}' delimiters
around the list.
- Whitespace before and after each element is stripped.
- Elements in the list may be delimited by single or double quotes.
Within a quoted elements, the normal Java escape sequences are valid.
svalue
- String value to be parsed
- The parsed list of String values
Copyright (c) 2001-2007 - Apache Software Foundation