| /* |
| * 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.el; |
| |
| import java.util.Comparator; |
| import java.util.List; |
| |
| import javax.el.ELResolver; |
| import javax.faces.context.ExternalContext; |
| import javax.faces.context.FacesContext; |
| |
| import org.apache.myfaces.config.RuntimeConfig; |
| |
| /** |
| * Comparator for ELResolvers that shifts the Resolvers from |
| * the faces-config to the front. |
| * |
| * @author Jakob Korherr (latest modification by $Author$) |
| * @version $Revision$ $Date$ |
| * |
| * @since 1.2.10, 2.0.2 |
| */ |
| public class CustomFirstELResolverComparator implements Comparator<ELResolver> |
| { |
| |
| private List<ELResolver> _facesConfigResolvers; |
| |
| @Override |
| public int compare(ELResolver r1, ELResolver r2) |
| { |
| List<ELResolver> facesConfigResolvers = _getFacesConfigElResolvers(); |
| |
| if (facesConfigResolvers == null) |
| { |
| // no el-resolvers in faces-config |
| return 0; // keep order |
| } |
| |
| boolean r1FromFacesConfig = facesConfigResolvers.contains(r1); |
| boolean r2FromFacesConfig = facesConfigResolvers.contains(r2); |
| |
| if (r1FromFacesConfig) |
| { |
| if (r2FromFacesConfig) |
| { |
| // both are from faces-config |
| return 0; // keep order |
| } |
| else |
| { |
| // only r1 is from faces-config |
| return -1; |
| } |
| } |
| else |
| { |
| if (r2FromFacesConfig) |
| { |
| // only r2 is from faces-config |
| return 1; |
| } |
| else |
| { |
| // neither r1 nor r2 are from faces-config |
| return 0; // keep order |
| } |
| } |
| } |
| |
| /** |
| * Returns a List of all ELResolvers from the faces-config. |
| * @return |
| */ |
| private List<ELResolver> _getFacesConfigElResolvers() |
| { |
| if (_facesConfigResolvers == null) |
| { |
| ExternalContext externalContext |
| = FacesContext.getCurrentInstance().getExternalContext(); |
| RuntimeConfig runtimeConfig |
| = RuntimeConfig.getCurrentInstance(externalContext); |
| _facesConfigResolvers |
| = runtimeConfig.getFacesConfigElResolvers(); |
| } |
| |
| return _facesConfigResolvers; |
| } |
| |
| } |