/*
* Copyright 2011-2012 Blazebit
*
* Licensed 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 com.blazebit.blazefaces.renderkit;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.el.ELException;
import javax.el.ExpressionFactory;
import javax.el.ValueExpression;
import javax.faces.component.*;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.ConverterException;
import javax.faces.model.SelectItem;
public abstract class InputRenderer extends OutputRenderer {
protected List<SelectItem> getSelectItems(FacesContext context, UIInput component) {
List<SelectItem> selectItems = new ArrayList<SelectItem>();
for(UIComponent child : component.getChildren()) {
if(child instanceof UISelectItem) {
UISelectItem uiSelectItem = (UISelectItem) child;
Object selectItemValue = uiSelectItem.getValue();
if(selectItemValue == null) {
selectItems.add(new SelectItem(uiSelectItem.getItemValue(), uiSelectItem.getItemLabel(), uiSelectItem.getItemDescription(), uiSelectItem.isItemDisabled(), uiSelectItem.isItemEscaped(), uiSelectItem.isNoSelectionOption()));
}
else {
selectItems.add((SelectItem) selectItemValue);
}
}
else if(child instanceof UISelectItems) {
UISelectItems uiSelectItems = ((UISelectItems) child);
Object value = uiSelectItems.getValue();
if(value != null) {
if(value instanceof SelectItem) {
selectItems.add((SelectItem) value);
}
else if(value.getClass().isArray()) {
for(int i = 0; i < Array.getLength(value); i++) {
Object item = Array.get(value, i);
if(item instanceof SelectItem)
selectItems.add((SelectItem) item);
else
selectItems.add(createSelectItem(context, uiSelectItems, item));
}
}
else if(value instanceof Map) {
Map map = (Map) value;
for(Iterator it = map.keySet().iterator(); it.hasNext();) {
Object key = it.next();
selectItems.add(createSelectItem(context, uiSelectItems, String.valueOf(key), map.get(key)));
}
}
else if(value instanceof Collection) {
Collection collection = (Collection) value;
for(Iterator it = collection.iterator(); it.hasNext();) {
Object item = it.next();
if(item instanceof SelectItem)
selectItems.add((SelectItem) item);
else
selectItems.add(createSelectItem(context, uiSelectItems, item));
}
}
}
}
}
return selectItems;
}
protected SelectItem createSelectItem(FacesContext context, UISelectItems uiSelectItems, Object object) {
String var = (String) uiSelectItems.getAttributes().get("var");
if(var != null) {
context.getExternalContext().getRequestMap().put(var, object);
Object itemLabelAsObject = uiSelectItems.getAttributes().get("itemLabel");
Object itemValue = uiSelectItems.getAttributes().get("itemValue");
String description = (String) uiSelectItems.getAttributes().get("itemDescription");
Object itemDisabled = uiSelectItems.getAttributes().get("itemDisabled");
Object itemEscaped = uiSelectItems.getAttributes().get("itemLabelEscaped");
Object noSelection = uiSelectItems.getAttributes().get("noSelectionOption");
if(itemValue == null) {
itemValue = object;
}
String itemLabel = itemLabelAsObject == null ? String.valueOf(object) : String.valueOf(itemLabelAsObject);
boolean disabled = itemDisabled == null ? false : Boolean.valueOf(itemDisabled.toString());
boolean escaped = itemEscaped == null ? false : Boolean.valueOf(itemEscaped.toString());
boolean noSelectionOption = noSelection == null ? false : Boolean.valueOf(noSelection.toString());
return new SelectItem(itemValue, itemLabel, description, disabled, escaped, noSelectionOption);
}
else {
return new SelectItem(object, String.valueOf(object));
}
}
protected SelectItem createSelectItem(FacesContext context, UISelectItems uiSelectItems, String itemLabel, Object itemValue) {
String var = (String) uiSelectItems.getAttributes().get("var");
if(var != null) {
context.getExternalContext().getRequestMap().put(var, itemValue);
String description = (String) uiSelectItems.getAttributes().get("itemDescription");
Boolean disabled = Boolean.valueOf(((String) uiSelectItems.getAttributes().get("itemDisabled")));
Boolean escaped = Boolean.valueOf(((String) uiSelectItems.getAttributes().get("itemLabelEscaped")));
Boolean noSelectionOption = Boolean.valueOf(((String) uiSelectItems.getAttributes().get("noSelectionOption")));
return new SelectItem(itemValue, itemLabel, description, disabled, escaped, noSelectionOption);
}
else {
return new SelectItem(itemValue, itemLabel);
}
}
protected String getOptionAsString(FacesContext context, UIComponent component, Converter converter, Object value) throws ConverterException {
if(!(component instanceof ValueHolder)) {
return value == null ? null : value.toString();
}
if(converter == null) {
if(value == null) {
return "";
}
else if(value instanceof String) {
return (String) value;
}
else {
Converter implicitConverter = findImplicitConverter(context, component);
return implicitConverter == null ? value.toString() : implicitConverter.getAsString(context, component, value);
}
}
else {
return converter.getAsString(context, component, value);
}
}
protected Converter findImplicitConverter(FacesContext context, UIComponent component) {
ValueExpression ve = component.getValueExpression("value");
if(ve != null) {
Class<?> valueType = ve.getType(context.getELContext());
if(valueType != null)
return context.getApplication().createConverter(valueType);
}
return null;
}
protected Converter findConverter(FacesContext context, UIComponent component) {
if(!(component instanceof ValueHolder)) {
return null;
}
Converter converter = ((ValueHolder) component).getConverter();
if(converter != null) {
return converter;
}
else {
return findImplicitConverter(context, component);
}
}
@Override
public Object getConvertedValue(FacesContext context, UIComponent component, Object submittedValue) throws ConverterException {
Converter converter = findConverter(context, component);
if(converter != null) {
return converter.getAsObject(context, component, (String) submittedValue);
}
else {
return submittedValue;
}
}
protected Object coerceToModelType(FacesContext ctx, Object value, Class itemValueType) {
Object newValue;
try {
ExpressionFactory ef = ctx.getApplication().getExpressionFactory();
newValue = ef.coerceToType(value, itemValueType);
}
catch (ELException ele) {
newValue = value;
}
catch (IllegalArgumentException iae) {
newValue = value;
}
return newValue;
}
public static boolean shouldDecode(UIComponent component) {
boolean disabled = Boolean.valueOf(String.valueOf(component.getAttributes().get("disabled")));
boolean readonly = Boolean.valueOf(String.valueOf(component.getAttributes().get("readonly")));
return !disabled && !readonly;
}
protected Class<?> getValueType(FacesContext context, UIInput input) {
ValueExpression ve = input.getValueExpression("value");
Class<?> type = ve == null ? String.class : ve.getType(context.getELContext());
return type == null ? String.class : type;
}
}