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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); } } }




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