package org.apache.myfaces.tobago.compat;
/*
* 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.
*/
import org.apache.myfaces.tobago.event.TabChangeSource;
import org.apache.myfaces.tobago.event.ValueExpressionPopupActionListener;
import org.apache.myfaces.tobago.event.ValueExpressionResetInputActionListener;
import org.apache.myfaces.tobago.event.ValueExpressionTabChangeListener;
import org.apache.myfaces.tobago.util.ValueExpressionComparator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.el.ExpressionFactory;
import javax.el.MethodExpression;
import javax.el.ValueExpression;
import javax.faces.component.ActionSource;
import javax.faces.component.ContextCallback;
import javax.faces.component.EditableValueHolder;
import javax.faces.component.NamingContainer;
import javax.faces.component.UIComponent;
import javax.faces.component.ValueHolder;
import javax.faces.context.FacesContext;
import javax.faces.el.EvaluationException;
import javax.faces.el.MethodBinding;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.FacesEvent;
import javax.faces.validator.MethodExpressionValidator;
import java.util.Comparator;
public class FacesUtilsEL {
private static final Logger LOG = LoggerFactory.getLogger(FacesUtilsEL.class);
public static boolean invokeOnComponent(
FacesContext context, UIComponent component, String clientId, ContextCallback callback) {
String thisClientId = component.getClientId(context);
if (clientId.equals(thisClientId)) {
callback.invokeContextCallback(context, component);
return true;
} else if (component instanceof NamingContainer) {
// This component is a naming container. If the client id shows it's inside this naming container,
// then process further.
// Otherwise we know the client id we're looking for is not in this naming container,
// so for improved performance short circuit and return false.
if (clientId.startsWith(thisClientId)
&& (clientId.charAt(thisClientId.length()) == NamingContainer.SEPARATOR_CHAR)) {
if (invokeOnComponentFacetsAndChildren(context, component, clientId, callback)) {
return true;
}
}
} else {
if (invokeOnComponentFacetsAndChildren(context, component, clientId, callback)) {
return true;
}
}
return false;
}
private static boolean invokeOnComponentFacetsAndChildren(
FacesContext context, UIComponent component, String clientId, ContextCallback callback) {
for (java.util.Iterator<UIComponent> it = component.getFacetsAndChildren(); it.hasNext();) {
UIComponent child = it.next();
if (child.invokeOnComponent(context, clientId, callback)) {
return true;
}
}
return false;
}
public static void invokeMethodBinding(FacesContext facesContext, MethodBinding methodBinding, FacesEvent event) {
if (methodBinding != null && event != null) {
try {
methodBinding.invoke(facesContext, new Object[]{event});
} catch (EvaluationException e) {
Throwable cause = e.getCause();
if (cause instanceof AbortProcessingException) {
throw (AbortProcessingException) cause;
} else {
throw e;
}
}
}
}
public static void invokeMethodExpression(
FacesContext facesContext, MethodExpression methodExpression, FacesEvent event) {
if (methodExpression != null && event != null) {
try {
methodExpression.invoke(facesContext.getELContext(), new Object[]{event});
} catch (Exception e) {
throw new AbortProcessingException(e);
}
}
}
public static Object getValueFromValueBindingOrValueExpression(
FacesContext context, UIComponent component, String name) {
return component.getValueExpression(name).getValue(context.getELContext());
}
public static boolean hasValueBindingOrValueExpression(UIComponent component, String name) {
return component.getValueExpression(name) != null;
}
public static boolean isReadonlyValueBindingOrValueExpression(
FacesContext context, UIComponent component, String name) {
return component.getValueExpression(name).isReadOnly(context.getELContext());
}
public static String getExpressionString(UIComponent component, String name) {
return component.getValueExpression(name).getExpressionString();
}
public static void setValueOfBindingOrExpression(
FacesContext context, Object value, UIComponent component, String bindingName) {
ValueExpression ve = component.getValueExpression(bindingName);
if (ve != null) {
ve.setValue(context.getELContext(), value);
}
}
public static void setValueOfBindingOrExpression(
FacesContext context, Object value, Object bindingOrExpression) {
if (bindingOrExpression instanceof ValueExpression) {
ValueExpression ve = (ValueExpression) bindingOrExpression;
ve.setValue(context.getELContext(), value);
}
}
public static void copyValueBindingOrValueExpression(
UIComponent fromComponent, String fromName, UIComponent toComponent, String toName) {
ValueExpression ve = fromComponent.getValueExpression(fromName);
if (ve != null) {
toComponent.setValueExpression(toName, ve);
}
}
public static Object getValueFromBindingOrExpression(Object obj) {
if (obj instanceof ValueExpression) {
ValueExpression expression = (ValueExpression) obj;
return expression.getValue(FacesContext.getCurrentInstance().getELContext());
}
return null;
}
public static Object createExpressionOrBinding(String string) {
FacesContext facesContext = FacesContext.getCurrentInstance();
ExpressionFactory expressionFactory = facesContext.getApplication().getExpressionFactory();
ValueExpression valueExpression =
expressionFactory.createValueExpression(facesContext.getELContext(), string, Object.class);
return valueExpression;
}
public static void setValidator(EditableValueHolder editableValueHolder, Object validator) {
if (validator instanceof MethodExpression) {
editableValueHolder.addValidator(new MethodExpressionValidator((MethodExpression) validator));
} else {
LOG.error("Unknow instance for validator: " + (validator != null ? validator.getClass().getName() : validator));
}
}
public static void setConverter(ValueHolder valueHolder, Object converterExpression) {
if (converterExpression instanceof ValueExpression) {
ValueExpression expression = (ValueExpression) converterExpression;
if (!expression.isLiteralText()) {
((UIComponent) valueHolder).setValueExpression("converter", expression);
} else {
valueHolder.setConverter(FacesContext.getCurrentInstance()
.getApplication().createConverter(expression.getExpressionString()));
}
}
}
public static void setBindingOrExpression(UIComponent component, String name, Object valueBindingOrExpression) {
component.setValueExpression(name, (ValueExpression) valueBindingOrExpression);
}
public static void addBindingOrExpressionTabChangeListener(
TabChangeSource source, String type, Object bindingOrExpression) {
if (bindingOrExpression instanceof ValueExpression) {
source.addTabChangeListener(new ValueExpressionTabChangeListener(type, (ValueExpression) bindingOrExpression));
}
}
public static Comparator getBindingOrExpressionComparator(
FacesContext facesContext, UIComponent child, String var, boolean descending, Comparator comparator) {
ValueExpression valueBinding = child.getValueExpression("value");
return new ValueExpressionComparator(facesContext, var, valueBinding, descending, comparator);
}
public static void addBindingOrExpressionPopupActionListener(ActionSource actionSource, Object bindingOrExpression) {
actionSource.addActionListener(new ValueExpressionPopupActionListener((ValueExpression) bindingOrExpression));
}
public static void addBindingOrExpressionResetActionListener(ActionSource actionSource, Object bindingOrExpression) {
actionSource.addActionListener(new ValueExpressionResetInputActionListener((ValueExpression) bindingOrExpression));
}
}