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/*
 * Copyright (c) 1997, 2021 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package com.sun.xml.bind.v2.runtime;

import java.io.IOException;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

import javax.xml.bind.ValidationEvent;
import javax.xml.bind.helpers.ValidationEventImpl;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;

import com.sun.xml.bind.v2.model.runtime.RuntimeArrayInfo;
import com.sun.xml.bind.v2.runtime.unmarshaller.Loader;
import com.sun.xml.bind.v2.runtime.unmarshaller.Receiver;
import com.sun.xml.bind.v2.runtime.unmarshaller.TagName;
import com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext;

import org.xml.sax.SAXException;

/**
 * {@link JaxBeanInfo} implementation that binds T[] to a complex type
 * with an element for each item.
 *
 * @author Kohsuke Kawaguchi
 */
final class ArrayBeanInfoImpl  extends JaxBeanInfo {

    private final Class itemType;
    private final JaxBeanInfo itemBeanInfo;
    private Loader loader;

    public ArrayBeanInfoImpl(JAXBContextImpl owner, RuntimeArrayInfo rai) {
        super(owner,rai,rai.getType(), rai.getTypeName(), false, true, false);
        this.itemType = jaxbType.getComponentType();
        this.itemBeanInfo = owner.getOrCreate(rai.getItemType());
    }

    @Override
    protected void link(JAXBContextImpl grammar) {
        getLoader(grammar,false);
        super.link(grammar);
    }

    private final class ArrayLoader extends Loader implements Receiver {
        public ArrayLoader(JAXBContextImpl owner) {
            super(false);
            itemLoader = itemBeanInfo.getLoader(owner,true);
        }

        private final Loader itemLoader;

        @Override
        public void startElement(UnmarshallingContext.State state, TagName ea) {
            state.setTarget(new ArrayList());
        }

        @Override
        public void leaveElement(UnmarshallingContext.State state, TagName ea) {
            state.setTarget(toArray((List)state.getTarget()));
        }

        @Override
        public void childElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
            if(ea.matches("","item")) {
                state.setLoader(itemLoader);
                state.setReceiver(this);
            } else {
                super.childElement(state,ea);
            }
        }

        @Override
        public Collection getExpectedChildElements() {
            return Collections.singleton(new QName("","item"));
        }

        public void receive(UnmarshallingContext.State state, Object o) {
            ((List)state.getTarget()).add(o);
        }
    }

    protected Object toArray( List list ) {
        int len = list.size();
        Object array = Array.newInstance(itemType,len);
        for( int i=0; i




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