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The ServiceMix Validation component provides schema validation of documents using JAXP 1.3 and XMLSchema or RelaxNG.

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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.servicemix.validation.handler;

import javax.jbi.messaging.MessagingException;

import org.xml.sax.ErrorHandler;

public interface MessageAwareErrorHandler extends ErrorHandler {

    /**
     * Does the error handler contain any error messages?
     * 
     * @return
     */
    boolean hasErrors();

    /**
     * Return the number of warnings.
     * 
     * @return
     */
    int getWarningCount();

    /**
     * Return the number of errors.
     * 
     * @return
     */
    int getErrorCount();

    /**
     * Return the number of fatal errors.
     * 
     * @return
     */
    int getFatalErrorCount();

    /**
     * Does this ErrorHandler implementation capture error messages?
     * 
     * @return
     */
    boolean capturesMessages();

    /**
     * Get the messages from this ErrorHandler in a particular format.
     * 
     * @return
     */
    Object getMessagesAs(Class format) throws MessagingException;

    /**
     * Does the message support a given format?
     * 
     * @param clazz The Class of the format for which support is required.
     * @return
     */
    boolean supportsMessageFormat(Class format);
}