| /* |
| * 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.component; |
| |
| import javax.faces.FacesException; |
| import javax.faces.context.FacesContext; |
| import javax.faces.convert.Converter; |
| import javax.faces.convert.ConverterException; |
| import javax.faces.el.ValueBinding; |
| import java.lang.reflect.Array; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * The util methods in this class are shared between the javax.faces.component package and |
| * the org.apache.myfaces.renderkit package. |
| * Please note: Any changes here must also apply to the class in the other package! |
| * |
| * @author Manfred Geiler (latest modification by $Author$) |
| * @version $Revision$ $Date$ |
| */ |
| class _SharedRendererUtils |
| { |
| static Converter findUIOutputConverter(FacesContext facesContext, UIOutput component) |
| { |
| // Attention! |
| // This code is duplicated in myfaces implementation renderkit package. |
| // If you change something here please do the same in the other class! |
| |
| Converter converter = component.getConverter(); |
| if (converter != null) return converter; |
| |
| //Try to find out by value binding |
| ValueBinding vb = component.getValueBinding("value"); |
| if (vb == null) return null; |
| |
| Class valueType = vb.getType(facesContext); |
| if (valueType == null) return null; |
| |
| if (String.class.equals(valueType)) return null; //No converter needed for String type |
| if (Object.class.equals(valueType)) return null; //There is no converter for Object class |
| |
| try |
| { |
| return facesContext.getApplication().createConverter(valueType); |
| } |
| catch (FacesException e) |
| { |
| log(facesContext, "No Converter for type " + valueType.getName() + " found", e); |
| return null; |
| } |
| } |
| |
| static Object getConvertedUISelectManyValue(FacesContext facesContext, |
| UISelectMany component, |
| String[] submittedValue) |
| throws ConverterException |
| { |
| // Attention! |
| // This code is duplicated in myfaces implementation renderkit package. |
| // If you change something here please do the same in the other class! |
| |
| if (submittedValue == null) throw new NullPointerException("submittedValue"); |
| |
| ValueBinding vb = component.getValueBinding("value"); |
| Class valueType = null; |
| Class arrayComponentType = null; |
| if (vb != null) |
| { |
| valueType = vb.getType(facesContext); |
| if (valueType != null && valueType.isArray()) |
| { |
| arrayComponentType = valueType.getComponentType(); |
| } |
| } |
| |
| Converter converter = component.getConverter(); |
| if (converter == null) |
| { |
| if (valueType == null) |
| { |
| // No converter, and no idea of expected type |
| // --> return the submitted String array |
| return submittedValue; |
| } |
| |
| if (List.class.isAssignableFrom(valueType)) |
| { |
| // expected type is a List |
| // --> according to javadoc of UISelectMany we assume that the element type |
| // is java.lang.String, and copy the String array to a new List |
| int len = submittedValue.length; |
| List lst = new ArrayList(len); |
| for (int i = 0; i < len; i++) |
| { |
| lst.add(submittedValue[i]); |
| } |
| return lst; |
| } |
| |
| if (arrayComponentType == null) |
| { |
| throw new IllegalArgumentException("ValueBinding for UISelectMany must be of type List or Array"); |
| } |
| |
| if (String.class.equals(arrayComponentType)) return submittedValue; //No conversion needed for String type |
| if (Object.class.equals(arrayComponentType)) return submittedValue; //No conversion for Object class |
| |
| try |
| { |
| converter = facesContext.getApplication().createConverter(arrayComponentType); |
| } |
| catch (FacesException e) |
| { |
| log(facesContext, "No Converter for type " + arrayComponentType.getName() + " found", e); |
| return submittedValue; |
| } |
| if(converter==null) |
| { |
| log(facesContext, "No Converter for type " + arrayComponentType.getName() + " found.",null); |
| return submittedValue; |
| } |
| } |
| |
| // Now, we have a converter... |
| // We determine the type of the component array after converting one of it's elements |
| if (vb != null) |
| { |
| valueType = vb.getType(facesContext); |
| if (valueType != null && valueType.isArray()) |
| { |
| if (submittedValue.length > 0) |
| { |
| arrayComponentType = converter.getAsObject(facesContext, component, submittedValue[0]).getClass(); |
| } |
| } |
| } |
| |
| if (valueType == null) |
| { |
| // ...but have no idea of expected type |
| // --> so let's convert it to an Object array |
| int len = submittedValue.length; |
| Object [] convertedValues = (Object []) Array.newInstance( |
| arrayComponentType==null?Object.class:arrayComponentType, len); |
| for (int i = 0; i < len; i++) |
| { |
| convertedValues[i] |
| = converter.getAsObject(facesContext, component, submittedValue[i]); |
| } |
| return convertedValues; |
| } |
| |
| if (List.class.isAssignableFrom(valueType)) |
| { |
| // Curious case: According to specs we should assume, that the element type |
| // of this List is java.lang.String. But there is a Converter set for this |
| // component. Because the user must know what he is doing, we will convert the values. |
| int len = submittedValue.length; |
| List lst = new ArrayList(len); |
| for (int i = 0; i < len; i++) |
| { |
| lst.add(converter.getAsObject(facesContext, component, submittedValue[i])); |
| } |
| return lst; |
| } |
| |
| if (arrayComponentType == null) |
| { |
| throw new IllegalArgumentException("ValueBinding for UISelectMany must be of type List or Array"); |
| } |
| |
| if (arrayComponentType.isPrimitive()) |
| { |
| //primitive array |
| int len = submittedValue.length; |
| Object convertedValues = Array.newInstance(arrayComponentType, len); |
| for (int i = 0; i < len; i++) |
| { |
| Array.set(convertedValues, i, |
| converter.getAsObject(facesContext, component, submittedValue[i])); |
| } |
| return convertedValues; |
| } |
| else |
| { |
| //Object array |
| int len = submittedValue.length; |
| ArrayList convertedValues = new ArrayList(len); |
| for (int i = 0; i < len; i++) |
| { |
| convertedValues.add(i, converter.getAsObject(facesContext, component, submittedValue[i])); |
| } |
| return convertedValues.toArray((Object[]) Array.newInstance(arrayComponentType, len)); |
| } |
| } |
| |
| |
| |
| /** |
| * This method is different in the two versions of _SharedRendererUtils. |
| */ |
| private static void log(FacesContext context, String msg, Exception e) |
| { |
| if(e != null) |
| { |
| context.getExternalContext().log(msg, e); |
| } |
| else |
| { |
| context.getExternalContext().log(msg); |
| } |
| } |
| } |