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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package com.sun.xml.internal.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.internal.bind.v2.model.runtime.RuntimeArrayInfo;

import com.sun.xml.internal.bind.v2.runtime.unmarshaller.Loader;

import com.sun.xml.internal.bind.v2.runtime.unmarshaller.Receiver;

import com.sun.xml.internal.bind.v2.runtime.unmarshaller.TagName;

import com.sun.xml.internal.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.target = new ArrayList();

        }

        @Override

        public void leaveElement(UnmarshallingContext.State state, TagName ea) {

            state.target = toArray((List)state.target);

        }

        @Override

        public void childElement(UnmarshallingContext.State state, TagName ea) throws SAXException {

            if(ea.matches("","item")) {

                state.loader = itemLoader;

                state.receiver = this;

            } else {

                super.childElement(state,ea);

            }

        }

        @Override

        public Collection<QName> getExpectedChildElements() {

            return Collections.singleton(new QName("","item"));

        }

        public void receive(UnmarshallingContext.State state, Object o) {

            ((List)state.target).add(o);

        }

    };

    protected Object toArray( List list ) {

        int len = list.size();

        Object array = Array.newInstance(itemType,len);

        for( int i=0; i<len; i++ )

            Array.set(array,i,list.get(i));

        return array;

    }

    public void serializeBody(Object array, XMLSerializer target) throws SAXException, IOException, XMLStreamException {

        int len = Array.getLength(array);

        for( int i=0; i<len; i++ )  {

            Object item = Array.get(array,i);

            // TODO: check the namespace URI.

            target.startElement("","item",null,null);

            if(item==null) {

                target.writeXsiNilTrue();

            } else {

                target.childAsXsiType(item,"arrayItem",itemBeanInfo, false);

            }

            target.endElement();

        }

    }

    public final String getElementNamespaceURI(Object array) {

        throw new UnsupportedOperationException();

    }

    public final String getElementLocalName(Object array) {

        throw new UnsupportedOperationException();

    }

    public final Object createInstance(UnmarshallingContext context) {

        // we first create a List and then later convert it to an array

        return new ArrayList();

    }

    public final boolean reset(Object array, UnmarshallingContext context) {

        return false;

    }

    public final String getId(Object array, XMLSerializer target) {

        return null;

    }

    public final void serializeAttributes(Object array, XMLSerializer target) {

        // noop

    }

    public final void serializeRoot(Object array, XMLSerializer target) throws SAXException, IOException, XMLStreamException {

        target.reportError(

                new ValidationEventImpl(

                        ValidationEvent.ERROR,

                        Messages.UNABLE_TO_MARSHAL_NON_ELEMENT.format(array.getClass().getName()),

                        null,

                        null));

    }

    public final void serializeURIs(Object array, XMLSerializer target) {

        // noop

    }

    public final Transducer getTransducer() {

        return null;

    }

    public final Loader getLoader(JAXBContextImpl context, boolean typeSubstitutionCapable) {

        if(loader==null)

            loader = new ArrayLoader(context);

        // type substitution not possible

        return loader;

    }

}