| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package javax.faces.convert; |
| |
| import javax.faces.component.UIComponent; |
| import javax.faces.context.FacesContext; |
| |
| import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFConverter; |
| |
| import java.text.DecimalFormatSymbols; |
| import java.util.Locale; |
| import org.apache.myfaces.core.api.shared._MessageUtils; |
| |
| /** |
| * see Javadoc of <a href="http://java.sun.com/javaee/javaserverfaces/1.2/docs/api/index.html">JSF Specification</a> |
| */ |
| @JSFConverter |
| public class DoubleConverter implements Converter |
| { |
| public static final String CONVERTER_ID = "javax.faces.Double"; |
| public static final String STRING_ID = "javax.faces.converter.STRING"; |
| public static final String DOUBLE_ID = "javax.faces.converter.DoubleConverter.DOUBLE"; |
| |
| public DoubleConverter() |
| { |
| } |
| |
| @Override |
| public Object getAsObject(FacesContext facesContext, UIComponent uiComponent, String value) |
| { |
| if (facesContext == null || uiComponent == null) |
| { |
| throw new NullPointerException(); // should never happen |
| } |
| |
| if (value == null) |
| { |
| return null; |
| } |
| |
| value = value.trim(); |
| if (value.length() < 1) |
| { |
| return null; |
| } |
| |
| try |
| { |
| value = fixLocale(facesContext, value); |
| return Double.valueOf(value); |
| } |
| catch (NumberFormatException e) |
| { |
| throw new ConverterException(_MessageUtils.getErrorMessage(facesContext, |
| DOUBLE_ID, |
| new Object[]{value,"4214",_MessageUtils.getLabel(facesContext, uiComponent)}), e); |
| } |
| } |
| |
| /** |
| * Since Double.valueOf is not Locale aware, and NumberFormatter |
| * cannot parse E values correctly, we need to make a US Locale |
| * string from our input value. |
| * E.g. '34,383e3' will be translated to '34.383e3' if Locale.DE |
| * is set in the {@link javax.faces.component.UIViewRoot#getLocale()} |
| * |
| * @param facesContext |
| * @param value |
| * @return the 'fixed' value String |
| */ |
| private String fixLocale(FacesContext facesContext, String value) |
| { |
| Locale loc = facesContext.getViewRoot().getLocale(); |
| if (loc == null || loc == Locale.US) |
| { |
| // nothing to fix if we are already using the US Locale |
| return value; |
| } |
| |
| // TODO: DecimalFormatSymbols.getInstance exists only on JDK 1.6 |
| // change it on JSF 2.1 |
| //DecimalFormatSymbols dfs = DecimalFormatSymbols.getInstance(loc); |
| DecimalFormatSymbols dfs = new DecimalFormatSymbols(loc); |
| |
| char decSep = dfs.getDecimalSeparator(); |
| |
| |
| // replace decimal separators which are different to '.' |
| if (decSep != '.' && value.lastIndexOf(decSep) >= 0) |
| { |
| StringBuilder sbVal = new StringBuilder(); |
| |
| // remove all groupSeperators and change the decimalSeperator |
| for (int i = 0; i < value.length(); i++) |
| { |
| if (value.charAt(i) == decSep) |
| { |
| sbVal.append('.'); // we append the Locale.US decimal separator |
| continue; |
| } |
| |
| // just append all other characters as usual |
| sbVal.append(value.charAt(i)); |
| } |
| |
| value = sbVal.toString(); |
| } |
| |
| // we need the formatter with the correct Locale of the user |
| return value; |
| } |
| |
| @Override |
| public String getAsString(FacesContext facesContext, UIComponent uiComponent, Object value) |
| { |
| if (facesContext == null || uiComponent == null) |
| { |
| throw new NullPointerException(); // should never happen |
| } |
| |
| if (value == null) |
| { |
| return ""; |
| } |
| |
| if (value instanceof String) |
| { |
| return (String) value; |
| } |
| |
| try |
| { |
| return Double.toString(((Number)value).doubleValue()); |
| } |
| catch (Exception e) |
| { |
| throw new ConverterException(_MessageUtils.getErrorMessage(facesContext, STRING_ID, |
| new Object[]{value,_MessageUtils.getLabel(facesContext, uiComponent)}),e); |
| } |
| } |
| |
| } |