/*
* 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 org.apache.myfaces.tobago.renderkit;
import org.apache.commons.lang.ArrayUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.myfaces.tobago.util.ComponentUtils;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.component.UISelectMany;
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.Arrays;
import java.util.List;
public class SelectManyRendererBase extends LayoutComponentRendererBase {
private static final Logger LOG = LoggerFactory.getLogger(SelectManyRendererBase.class);
public void decode(FacesContext facesContext, UIComponent component) {
if (ComponentUtils.isOutputOnly(component)) {
return;
}
if (component instanceof UISelectMany) {
UISelectMany uiSelectMany = (UISelectMany) component;
String[] newValues = (String[])
facesContext.getExternalContext().getRequestParameterValuesMap().get(uiSelectMany.getClientId(facesContext));
if (LOG.isDebugEnabled()) {
LOG.debug("decode: key='" + component.getClientId(facesContext)
+ "' value='" + Arrays.toString(newValues) + "'");
LOG.debug("size ... '" + (newValues != null ? newValues.length : -1) + "'");
if (newValues != null) {
for (String newValue : newValues) {
LOG.debug("newValues[i] = '" + newValue + "'");
}
}
}
if (newValues == null) {
newValues = ArrayUtils.EMPTY_STRING_ARRAY; // because no selection will not submitted by browsers
}
uiSelectMany.setSubmittedValue(newValues);
}
}
// the following is copied from myfaces shared RendererUtils
public Object getConvertedValue(FacesContext facesContext, UIComponent component, Object submittedValue)
throws ConverterException {
if (submittedValue == null) {
return null;
} else {
if (!(submittedValue instanceof String[])) {
throw new ConverterException("Submitted value of type String[] for component : "
+ component.getClientId(facesContext) + "expected");
}
}
return getConvertedUISelectManyValue(facesContext, (UISelectMany) component, (String[]) submittedValue);
}
private Object getConvertedUISelectManyValue(FacesContext facesContext,
UISelectMany component,
String[] submittedValue)
throws ConverterException {
// Attention!
// This code is duplicated in jsfapi component 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
return Arrays.asList(submittedValue);
}
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.error("No Converter for type " + arrayComponentType.getName() + " found", e);
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 && arrayComponentType == null
&& 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 length = submittedValue.length;
List<Object> list = new ArrayList<Object>(length);
for (int i = 0; i < length; i++) {
list.add(converter.getAsObject(facesContext, component, submittedValue[i]));
}
return list;
}
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 length = submittedValue.length;
List<Object> convertedValues = new ArrayList<Object>(length);
for (int i = 0; i < length; i++) {
convertedValues.add(i, converter.getAsObject(facesContext, component, submittedValue[i]));
}
return convertedValues.toArray((Object[]) Array.newInstance(arrayComponentType, length));
}
}
}