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Tomcat example source code file (DigesterFactory.java)
This example Tomcat source code file (DigesterFactory.java) is included in the DevDaily.com
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The Tomcat DigesterFactory.java source code
/*
* 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.catalina.startup;
import java.net.URL;
import org.apache.catalina.util.SchemaResolver;
import org.apache.tomcat.util.digester.Digester;
import org.apache.tomcat.util.digester.RuleSet;
/**
* Wrapper class around the Digester that hide Digester's initialization details
*
* @author Jean-Francois Arcand
*/
public class DigesterFactory {
/**
* The log.
*/
protected static org.apache.juli.logging.Log log =
org.apache.juli.logging.LogFactory.getLog(DigesterFactory.class);
/**
* The XML entiry resolver used by the Digester.
*/
private static SchemaResolver schemaResolver;
/**
* Create a <code>Digester parser with no Rule
* associated and XML validation turned off.
*/
public static Digester newDigester(){
return newDigester(false, false, null);
}
/**
* Create a <code>Digester parser with XML validation turned off.
* @param rule an instance of <code>RuleSet used for parsing the xml.
*/
public static Digester newDigester(RuleSet rule){
return newDigester(false,false,rule);
}
/**
* Create a <code>Digester parser.
* @param xmlValidation turn on/off xml validation
* @param xmlNamespaceAware turn on/off namespace validation
* @param rule an instance of <code>RuleSet used for parsing the xml.
*/
public static Digester newDigester(boolean xmlValidation,
boolean xmlNamespaceAware,
RuleSet rule) {
Digester digester = new Digester();
digester.setNamespaceAware(xmlNamespaceAware);
digester.setValidating(xmlValidation);
digester.setUseContextClassLoader(true);
if (xmlValidation || xmlNamespaceAware){
configureSchema(digester);
}
schemaResolver = new SchemaResolver(digester);
registerLocalSchema();
digester.setEntityResolver(schemaResolver);
if ( rule != null ) {
digester.addRuleSet(rule);
}
return (digester);
}
/**
* Utilities used to force the parser to use local schema, when available,
* instead of the <code>schemaLocation XML element.
*/
protected static void registerLocalSchema(){
// J2EE
register(Constants.J2eeSchemaResourcePath_14,
Constants.J2eeSchemaPublicId_14);
// W3C
register(Constants.W3cSchemaResourcePath_10,
Constants.W3cSchemaPublicId_10);
// JSP
register(Constants.JspSchemaResourcePath_20,
Constants.JspSchemaPublicId_20);
register(Constants.JspSchemaResourcePath_21,
Constants.JspSchemaPublicId_21);
// TLD
register(Constants.TldDtdResourcePath_11,
Constants.TldDtdPublicId_11);
register(Constants.TldDtdResourcePath_12,
Constants.TldDtdPublicId_12);
register(Constants.TldSchemaResourcePath_20,
Constants.TldSchemaPublicId_20);
register(Constants.TldSchemaResourcePath_21,
Constants.TldSchemaPublicId_21);
// web.xml
register(Constants.WebDtdResourcePath_22,
Constants.WebDtdPublicId_22);
register(Constants.WebDtdResourcePath_23,
Constants.WebDtdPublicId_23);
register(Constants.WebSchemaResourcePath_24,
Constants.WebSchemaPublicId_24);
register(Constants.WebSchemaResourcePath_25,
Constants.WebSchemaPublicId_25);
// Web Service
register(Constants.J2eeWebServiceSchemaResourcePath_11,
Constants.J2eeWebServiceSchemaPublicId_11);
register(Constants.J2eeWebServiceClientSchemaResourcePath_11,
Constants.J2eeWebServiceClientSchemaPublicId_11);
}
/**
* Load the resource and add it to the resolver.
*/
protected static void register(String resourceURL, String resourcePublicId){
URL url = DigesterFactory.class.getResource(resourceURL);
if(url == null) {
log.warn("Could not get url for " + resourceURL);
} else {
schemaResolver.register(resourcePublicId , url.toString() );
}
}
/**
* Turn on DTD and/or validation (based on the parser implementation)
*/
protected static void configureSchema(Digester digester){
URL url = DigesterFactory.class
.getResource(Constants.WebSchemaResourcePath_24);
if(url == null) {
log.error("Could not get url for "
+ Constants.WebSchemaResourcePath_24);
} else {
digester.setSchema(url.toString());
}
}
}
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