org.apache.myfaces.view.facelets.el.RedirectMethodExpressionValueExpressionValidator Maven / Gradle / Ivy
/*
* 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.view.facelets.el;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import jakarta.el.ELContext;
import jakarta.el.MethodExpression;
import jakarta.el.ValueExpression;
import jakarta.faces.FacesWrapper;
import jakarta.faces.component.UIComponent;
import jakarta.faces.context.FacesContext;
import jakarta.faces.validator.Validator;
import jakarta.faces.validator.ValidatorException;
/**
*
* @author Leonardo Uribe
*/
public class RedirectMethodExpressionValueExpressionValidator
implements Validator, FacesWrapper, Externalizable
{
private ValueExpression valueExpression;
public RedirectMethodExpressionValueExpressionValidator()
{
}
public RedirectMethodExpressionValueExpressionValidator(ValueExpression valueExpression)
{
this.valueExpression = valueExpression;
}
@Override
public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException
{
ELContext elContext = context.getELContext();
getMethodExpression(elContext).invoke(elContext, new Object[]{context,component,value});
}
private MethodExpression getMethodExpression(ELContext context)
{
Object meOrVe = valueExpression.getValue(context);
if (meOrVe instanceof MethodExpression)
{
return (MethodExpression) meOrVe;
}
else if (meOrVe instanceof ValueExpression)
{
while (meOrVe != null && meOrVe instanceof ValueExpression)
{
meOrVe = ((ValueExpression)meOrVe).getValue(context);
}
return (MethodExpression) meOrVe;
}
else
{
return null;
}
}
@Override
public ValueExpression getWrapped()
{
return valueExpression;
}
@Override
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
{
this.valueExpression = (ValueExpression) in.readObject();
}
@Override
public void writeExternal(ObjectOutput out) throws IOException
{
out.writeObject(this.valueExpression);
}
}