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A slightly adapted version of Xerces 2.11.0 to allow the XMLStringBuffer responsible for XML attribute scanning to start larger and thus avoid extended appending times. The initial buffer size is controlled by settting the system property julielab.xerces.attributebuffersize (also available as constant XMLScanner#ATTRIBUTE_BUFFER_SIZE).

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/*
 * 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.xerces.jaxp.validation;

import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

/**
 * {@link ErrorHandler} that throws all errors and fatal errors.
 * 
 * @author Kohsuke Kawaguchi ([email protected])
 * @version $Id: DraconianErrorHandler.java 447235 2006-09-18 05:01:44Z mrglavas $
 */
final class DraconianErrorHandler implements ErrorHandler {

    /**
     * Singleton instance.
     */
    private static final DraconianErrorHandler ERROR_HANDLER_INSTANCE 
        = new DraconianErrorHandler();
    
    private DraconianErrorHandler() {}
    
    /** Returns the one and only instance of this error handler. */
    public static DraconianErrorHandler getInstance() {
        return ERROR_HANDLER_INSTANCE;
    }
    
    /** Warning: Ignore. */
    public void warning(SAXParseException e) throws SAXException {
        // noop
    }
    
    /** Error: Throws back SAXParseException. */
    public void error(SAXParseException e) throws SAXException {
        throw e;
    }
    
    /** Fatal Error: Throws back SAXParseException. */
    public void fatalError(SAXParseException e) throws SAXException {
        throw e;
    }
    
} // DraconianErrorHandler