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Modern server-side Java template engine for both web and standalone environments

There is a newer version: 3.1.3.RELEASE

/*
 * =============================================================================
 * 
 *   Copyright (c) 2011, The THYMELEAF team (http://www.thymeleaf.org)
 * 
 *   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.thymeleaf;

import java.io.IOException;
import java.io.InputStream;
import java.io.StringReader;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.thymeleaf.exceptions.ConfigurationException;
import org.thymeleaf.exceptions.ParserInitializationException;
import org.thymeleaf.exceptions.ParsingException;
import org.thymeleaf.exceptions.TemplateInputException;
import org.thymeleaf.resourceresolver.IResourceResolver;
import org.thymeleaf.templateresolver.ITemplateResolver;
import org.thymeleaf.templateresolver.TemplateResolution;
import org.w3c.dom.Document;
import org.xml.sax.InputSource;
import org.xml.sax.SAXParseException;


/**
 * 
 * @author Daniel Fernández
 * 
 * @since 1.0
 *
 */
public final class TemplateParser {

    private static final Logger logger = LoggerFactory.getLogger(TemplateParser.class);

    
    private static final String SAXPARSEEXCEPTION_BAD_ELEMENT_CONTENT = "The content of elements must consist of well-formed character data or markup.";
    private static final String SAXPARSEEXCEPTION_BAD_ELEMENT_CONTENT_EXPLANATION = 
        "The content of elements must consist of well-formed character data or markup. A usual reason for this is that one of your elements contains " +
        "unescaped special XML symbols like '<' inside its body, which is forbidden by XML rules. For example, if you have '<' inside a