org.attoparser.markup.CdataMarkupParsingUtil Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of attoparser Show documentation
Powerful, fast and easy to use HTML and XML parser for Java
There is a newer version: 2.0.7.RELEASE
/*
 * =============================================================================
 * 
 *   Copyright (c) 2012, The ATTOPARSER team (http://www.attoparser.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.attoparser.markup;

import org.attoparser.AttoParseException;



/**
 * 
 *   Class containing utility methods for parsing CDATA sections.
 * 
 * 
 * @author Daniel Fernández
 * 
 * @since 1.0
 *
 */
public final class CdataMarkupParsingUtil {

    

    
    private CdataMarkupParsingUtil() {
        super();
    }

    
    

    
    
    
    
    public static void parseCdata(
            final char[] buffer, 
            final int offset, final int len, 
            final int line, final int col, 
            final ICDATASectionHandling handler)
            throws AttoParseException {
        
        if (!tryParseCdata(buffer, offset, len, line, col, handler)) {
            throw new AttoParseException(
                    "Could not parse as markup CDATA: \"" + new String(buffer, offset, len) + "\"", line, col);
        }
        
    }

    

    
    
    public static boolean tryParseCdata(
            final char[] buffer, 
            final int offset, final int len, 
            final int line, final int col, 
            final ICDATASectionHandling handler)
            throws AttoParseException {

        if (len >= 12 && 
                isCdataStart(buffer, offset, (offset + len)) &&
                buffer[offset + len - 3] == ']' &&
                buffer[offset + len - 2] == ']' &&
                buffer[offset + len - 1] == '>') {
            handler.handleCDATASection(buffer, offset + 9, len - 12, offset, len, line, col);
            return true;
        }
        
        return false;
        
    }


    
    static boolean isCdataStart(final char[] buffer, final int offset, final int maxi) {
        return ((maxi - offset > 8) && 
                    buffer[offset] == '<' &&
                    buffer[offset + 1] == '!' &&
                    buffer[offset + 2] == '[' && 
                    (buffer[offset + 3] == 'C' || buffer[offset + 3] == 'c') && 
                    (buffer[offset + 4] == 'D' || buffer[offset + 4] == 'd') && 
                    (buffer[offset + 5] == 'A' || buffer[offset + 5] == 'a') && 
                    (buffer[offset + 6] == 'T' || buffer[offset + 6] == 't') && 
                    (buffer[offset + 7] == 'A' || buffer[offset + 7] == 'a') && 
                    buffer[offset + 8] == '[');
    }

    
}