/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * 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 org.seasar.teeda.core.config.faces;

 import java.io.InputStream;

 import javax.xml.parsers.SAXParser;

 import javax.xml.parsers.SAXParserFactory;

 import org.seasar.framework.container.factory.ClassPathResourceResolver;

 import org.seasar.framework.container.factory.ResourceResolver;

 import org.seasar.framework.log.Logger;

 import org.seasar.framework.util.InputStreamUtil;

 import org.seasar.framework.util.SAXParserFactoryUtil;

 import org.seasar.framework.xml.SaxHandler;

 import org.seasar.framework.xml.SaxHandlerParser;

 import org.seasar.framework.xml.TagHandlerRule;

 import org.seasar.teeda.core.config.faces.element.FacesConfig;

 import org.seasar.teeda.core.config.faces.rule.FacesConfigTagHandlerRule;

 /**

  * @author shot

  */

 public abstract class AbstractFacesConfigurator implements FacesConfigurator {

     private static final Logger logger_ = Logger

             .getLogger(AbstractFacesConfigurator.class);

     private static final String FACES_CONFIG_1_1 = "-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.1//EN";

     private static final String FACES_CONFIG_1_0 = "-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.0//EN";

     private static final String FACES_1_1_DTD_PATH = "org/seasar/teeda/core/resource/web-facesconfig_1_1.dtd";

     private static final String FACES_1_0_DTD_PATH = "org/seasar/teeda/core/resource/web-facesconfig_1_0.dtd";

     protected ResourceResolver resourceResolver_ = new ClassPathResourceResolver();

     protected TagHandlerRule rule_ = new FacesConfigTagHandlerRule();

     public AbstractFacesConfigurator() {

     }

     public FacesConfig configure() {

         String path = getPath();

         if (logger_.isDebugEnabled()) {

             logger_.debug("target file path = " + path);

         }

         SaxHandlerParser parser = createSaxHandlerParser();

         InputStream is = resourceResolver_.getInputStream(path);

         if (is == null) {

             return null;

         }

         try {

             return (FacesConfig) parser.parse(is, path);

         } finally {

             InputStreamUtil.close(is);

         }

     }

     protected final SaxHandlerParser createSaxHandlerParser() {

         final SAXParserFactory factory = SAXParserFactoryUtil.newInstance();

         factory.setValidating(true);

         final SAXParser saxParser = SAXParserFactoryUtil.newSAXParser(factory);

         final SaxHandler handler = new SaxHandler(rule_);

         handler.registerDtdPath(FACES_CONFIG_1_1, FACES_1_1_DTD_PATH);

         handler.registerDtdPath(FACES_CONFIG_1_0, FACES_1_0_DTD_PATH);

         SaxHandlerParser parser = new SaxHandlerParser(handler, saxParser);

         return parser;

     }

     public void setResourceResolver(ResourceResolver resourceResolver) {

         resourceResolver_ = resourceResolver;

     }

     public ResourceResolver getResourceResolver() {

         return resourceResolver_;

     }

     public void setTagHandlerRule(TagHandlerRule rule) {

         rule_ = rule;

     }

     public TagHandlerRule getTagHandlerRule() {

         return rule_;

     }

     protected abstract String getPath();

 }