| /* |
| * 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.taglib.core; |
| |
| import javax.el.ELContext; |
| import javax.el.ValueExpression; |
| import javax.faces.application.Application; |
| import javax.faces.application.FacesMessage; |
| import javax.faces.component.StateHolder; |
| import javax.faces.component.UIComponent; |
| import javax.faces.context.FacesContext; |
| import javax.faces.validator.Validator; |
| import javax.faces.validator.ValidatorException; |
| |
| /** |
| * This class is used in conjunction with ValidatorImplTag. |
| * |
| * When a tag like this is in a jsp page: |
| * |
| * <code> |
| * <f:validator binding="#{mybean}"/> |
| * |
| * or |
| * |
| * <f:validator validatorId="#{'anyid'}" binding="#{mybean}"/> |
| * </code> |
| * |
| * The value of mybean could be already on the context, so this |
| * converter avoid creating a new variable and use the previous one. |
| * |
| * @author Leonardo Uribe (latest modification by $Author$) |
| * @version $Revision$ $Date$ |
| * |
| */ |
| public class DelegateValidator implements Validator, StateHolder |
| { |
| |
| private ValueExpression _validatorId; |
| private ValueExpression _binding; |
| private String _validatorIdString = null; |
| |
| public DelegateValidator() |
| { |
| |
| } |
| |
| public DelegateValidator(ValueExpression id, ValueExpression binding, String converterIdString) |
| { |
| super(); |
| _validatorId = id; |
| _binding = binding; |
| _validatorIdString = converterIdString; |
| } |
| |
| @Override |
| public boolean isTransient() |
| { |
| return false; |
| } |
| |
| @Override |
| public void restoreState(FacesContext facesContext, Object state) |
| { |
| Object[] values = (Object[]) state; |
| _validatorId = (ValueExpression) values[0]; |
| _binding = (ValueExpression) values[1]; |
| _validatorIdString = (String) values[2]; |
| } |
| |
| @Override |
| public Object saveState(FacesContext facesContext) |
| { |
| Object[] values = new Object[3]; |
| values[0] = _validatorId; |
| values[1] = _binding; |
| values[2] = _validatorIdString; |
| return values; |
| } |
| |
| @Override |
| public void setTransient(boolean arg0) |
| { |
| // Do nothing |
| } |
| |
| private Validator _getDelegate() |
| { |
| return _createValidator(); |
| } |
| |
| private Validator _createValidator() |
| { |
| FacesContext facesContext = FacesContext.getCurrentInstance(); |
| ELContext elContext = facesContext.getELContext(); |
| if (null != _binding) |
| { |
| Object validator; |
| try |
| { |
| validator = _binding.getValue(elContext); |
| } |
| catch (Exception e) |
| { |
| throw new ValidatorException(new FacesMessage("Error while creating the Validator"), e); |
| } |
| if (validator instanceof Validator) |
| { |
| return (Validator) validator; |
| } |
| } |
| Application application = facesContext.getApplication(); |
| Validator validator = null; |
| try |
| { |
| // first check if an ValidatorId was set by a method |
| if (null != _validatorIdString) |
| { |
| validator = application.createValidator(_validatorIdString); |
| } |
| else if (null != _validatorId) |
| { |
| String validatorId = (String) _validatorId.getValue(elContext); |
| validator = application.createValidator(validatorId); |
| } |
| } |
| catch (Exception e) |
| { |
| throw new ValidatorException(new FacesMessage("Error while creating the Validator"), e); |
| } |
| |
| if (null != validator) |
| { |
| if (null != _binding) |
| { |
| _binding.setValue(elContext, validator); |
| } |
| return validator; |
| } |
| throw new ValidatorException(new FacesMessage("validatorId and/or binding must be specified")); |
| } |
| |
| @Override |
| public void validate(FacesContext facesContext, UIComponent component, Object value) |
| throws ValidatorException |
| { |
| _getDelegate().validate(facesContext, component, value); |
| } |
| |
| } |