/*

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

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

import java.io.IOException;

import java.lang.reflect.InvocationTargetException;

import javax.xml.bind.JAXBElement;

import javax.xml.bind.JAXBException;

import javax.xml.bind.annotation.DomHandler;

import javax.xml.stream.XMLStreamException;

import com.sun.xml.internal.bind.api.AccessorException;

import com.sun.xml.internal.bind.v2.ClassFactory;

import com.sun.xml.internal.bind.v2.model.core.PropertyKind;

import com.sun.xml.internal.bind.v2.model.core.WildcardMode;

import com.sun.xml.internal.bind.v2.model.runtime.RuntimeElement;

import com.sun.xml.internal.bind.v2.model.runtime.RuntimeReferencePropertyInfo;

import com.sun.xml.internal.bind.v2.runtime.ElementBeanInfoImpl;

import com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl;

import com.sun.xml.internal.bind.v2.runtime.JaxBeanInfo;

import com.sun.xml.internal.bind.v2.runtime.XMLSerializer;

import com.sun.xml.internal.bind.v2.runtime.reflect.Accessor;

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

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

import com.sun.xml.internal.bind.v2.util.QNameMap;

import org.xml.sax.SAXException;

/**

 * @author Kohsuke Kawaguchi

 */

final class SingleReferenceNodeProperty<BeanT,ValueT> extends PropertyImpl<BeanT> {

    private final Accessor<BeanT,ValueT> acc;

    private final QNameMap<JaxBeanInfo> expectedElements = new QNameMap<JaxBeanInfo>();

    private final DomHandler domHandler;

    private final WildcardMode wcMode;

    public SingleReferenceNodeProperty(JAXBContextImpl context, RuntimeReferencePropertyInfo prop) {

        super(context,prop);

        acc = prop.getAccessor().optimize(context);

        for (RuntimeElement e : prop.getElements()) {

            expectedElements.put( e.getElementName(), context.getOrCreate(e) );

        }

        if(prop.getWildcard()!=null) {

            domHandler = (DomHandler) ClassFactory.create(prop.getDOMHandler());

            wcMode = prop.getWildcard();

        } else {

            domHandler = null;

            wcMode = null;

        }

    }

    public void reset(BeanT bean) throws AccessorException {

        acc.set(bean,null);

    }

    public String getIdValue(BeanT beanT) {

        return null;

    }

    public void serializeBody(BeanT o, XMLSerializer w, Object outerPeer) throws SAXException, AccessorException, IOException, XMLStreamException {

        ValueT v = acc.get(o);

        if(v!=null) {

            try {

                JaxBeanInfo bi = w.grammar.getBeanInfo(v,true);

                if(bi.jaxbType==Object.class && domHandler!=null)

                    // even if 'v' is a DOM node, it always derive from Object,

                    // so the getBeanInfo returns BeanInfo for Object

                    w.writeDom(v,domHandler,o,fieldName);

                else

                    bi.serializeRoot(v,w);

            } catch (JAXBException e) {

                w.reportError(fieldName,e);

                // recover by ignoring this property

            }

        }

    }

    public void buildChildElementUnmarshallers(UnmarshallerChain chain, QNameMap<ChildLoader> handlers) {

        for (QNameMap.Entry<JaxBeanInfo> n : expectedElements.entrySet())

            handlers.put(n.nsUri,n.localName, new ChildLoader(n.getValue().getLoader(chain.context,true),acc));

        if(domHandler!=null)

            handlers.put(CATCH_ALL,new ChildLoader(new WildcardLoader(domHandler,wcMode),acc));

    }

    public PropertyKind getKind() {

        return PropertyKind.REFERENCE;

    }

    @Override

    public Accessor getElementPropertyAccessor(String nsUri, String localName) {

        JaxBeanInfo bi = expectedElements.get(nsUri, localName);

        if(bi!=null) {

            if(bi instanceof ElementBeanInfoImpl) {

                final ElementBeanInfoImpl ebi = (ElementBeanInfoImpl) bi;

                // a JAXBElement. We need to handle JAXBElement for JAX-WS

                return new Accessor<BeanT,Object>(ebi.expectedType) {

                    public Object get(BeanT bean) throws AccessorException {

                        ValueT r = acc.get(bean);

                        if(r instanceof JAXBElement) {

                            return ((JAXBElement)r).getValue();

                        } else

                            // this is sloppy programming, but hey...

                            return r;

                    }

                    public void set(BeanT bean, Object value) throws AccessorException {

                        if(value!=null) {

                            try {

                                value = ebi.createInstanceFromValue(value);

                            } catch (IllegalAccessException e) {

                                throw new AccessorException(e);

                            } catch (InvocationTargetException e) {

                                throw new AccessorException(e);

                            } catch (InstantiationException e) {

                                throw new AccessorException(e);

                            }

                        }

                        acc.set(bean,(ValueT)value);

                    }

                };

            } else {

                // a custom element type, like @XmlRootElement class Foo { ... }

                return acc;

            }

        } else

            return null;

    }

}