javax.faces.convert.FloatConverter Maven / Gradle / Ivy
/*
* $Id: FloatConverter.java,v 1.20 2007/05/18 16:23:12 rlubke Exp $
*/
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package javax.faces.convert;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
/**
* {@link Converter} implementation for java.lang.Float
* (and float primitive) values.
*/
public class FloatConverter implements Converter {
// ------------------------------------------------------ Manifest Constants
/**
* The standard converter id for this converter.
*/
public static final String CONVERTER_ID = "javax.faces.Float";
/**
* The message identifier of the {@link javax.faces.application.FacesMessage} to be created if
* the conversion to Float fails. The message format
* string for this message may optionally include the following
* placeholders:
*
* {0} replaced by the unconverted value.{1} replaced by an example value.{2} replaced by a String whose value
* is the label of the input component that produced this message.
*/
public static final String FLOAT_ID =
"javax.faces.converter.FloatConverter.FLOAT";
/**
* The message identifier of the {@link javax.faces.application.FacesMessage} to be created if
* the conversion of the Float value to
* String fails. The message format string for this message
* may optionally include the following placeholders:
*
* {0} relaced by the unconverted value.{1} replaced by a String whose value
* is the label of the input component that produced this message.
*/
public static final String STRING_ID =
"javax.faces.converter.STRING";
// ------------------------------------------------------- Converter Methods
/**
* @throws ConverterException {@inheritDoc}
* @throws NullPointerException {@inheritDoc}
*/
public Object getAsObject(FacesContext context, UIComponent component,
String value) {
if (context == null || component == null) {
throw new NullPointerException();
}
// If the specified value is null or zero-length, return null
if (value == null) {
return (null);
}
value = value.trim();
if (value.length() < 1) {
return (null);
}
try {
return (Float.valueOf(value));
} catch (NumberFormatException nfe) {
throw new ConverterException(MessageFactory.getMessage(
context, FLOAT_ID, value, "2000000000",
MessageFactory.getLabel(context, component)), nfe);
} catch (Exception e) {
throw new ConverterException(e);
}
}
/**
* @throws ConverterException {@inheritDoc}
* @throws NullPointerException {@inheritDoc}
*/
public String getAsString(FacesContext context, UIComponent component,
Object value) {
if (context == null || component == null) {
throw new NullPointerException();
}
// If the specified value is null, return a zero-length String
if (value == null) {
return "";
}
// If the incoming value is still a string, play nice
// and return the value unmodified
if (value instanceof String) {
return (String) value;
}
try {
return (Float.toString(((Number) value).floatValue()));
} catch (Exception e) {
throw new ConverterException(MessageFactory.getMessage(
context, STRING_ID, value,
MessageFactory.getLabel(context, component)), e);
}
}
}