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/*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project 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 io.netty.handler.codec.xml;

import com.fasterxml.aalto.AsyncByteArrayFeeder;
import com.fasterxml.aalto.AsyncXMLInputFactory;
import com.fasterxml.aalto.AsyncXMLStreamReader;
import com.fasterxml.aalto.stax.InputFactoryImpl;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;

import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import java.util.List;

/**
 * Async XML decoder based on Aalto XML parser.
 *
 * Parses the incoming data into one of XML messages defined in this package.
 */

public class XmlDecoder extends ByteToMessageDecoder {

    private static final AsyncXMLInputFactory XML_INPUT_FACTORY = new InputFactoryImpl();
    private static final XmlDocumentEnd XML_DOCUMENT_END = XmlDocumentEnd.INSTANCE;

    private final AsyncXMLStreamReader streamReader = XML_INPUT_FACTORY.createAsyncForByteArray();
    private final AsyncByteArrayFeeder streamFeeder = streamReader.getInputFeeder();

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List