/*
 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
 * 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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 * questions.
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package com.sun.xml.internal.ws.message.jaxb;

import com.sun.istack.internal.logging.Logger;
import com.sun.xml.internal.ws.api.message.Attachment;
import com.sun.xml.internal.ws.api.message.AttachmentSet;
import com.sun.xml.internal.ws.message.DataHandlerAttachment;

import javax.activation.DataHandler;
import javax.xml.bind.attachment.AttachmentMarshaller;
import javax.xml.ws.WebServiceException;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URLEncoder;
import java.util.UUID;
import java.util.logging.Level;

/**
 * Implementation of {@link AttachmentMarshaller}, its used from JAXBMessage to marshall swaref type
 *
 * @author Vivek Pandey
 * @see JAXBMessage
 */
final class AttachmentMarshallerImpl extends AttachmentMarshaller {

    private static final Logger LOGGER = Logger.getLogger(AttachmentMarshallerImpl.class);

    private AttachmentSet attachments;

    public AttachmentMarshallerImpl(AttachmentSet attachemnts) {
        this.attachments = attachemnts;
    }

    /**
     * Release a reference to user objects to avoid keeping it in memory.
     */
    void cleanup() {
        attachments = null;
    }

    @Override
    public String addMtomAttachment(DataHandler data, String elementNamespace, String elementLocalName) {
        // We don't use JAXB for handling XOP
        throw new IllegalStateException();
    }

    @Override
    public String addMtomAttachment(byte[] data, int offset, int length, String mimeType, String elementNamespace, String elementLocalName) {
        // We don't use JAXB for handling XOP
        throw new IllegalStateException();
    }

    @Override
    public String addSwaRefAttachment(DataHandler data) {
        String cid = encodeCid(null);
        Attachment att = new DataHandlerAttachment(cid, data);
        attachments.add(att);
        cid = "cid:" + cid;
        return cid;
    }

    private String encodeCid(String ns) {
        String cid = "example.jaxws.sun.com";
        String name = UUID.randomUUID() + "@";
        if (ns != null && (ns.length() > 0)) {
            try {
                URI uri = new URI(ns);
                cid = uri.toURL().getHost();
            } catch (URISyntaxException e) {
                if (LOGGER.isLoggable(Level.INFO)) {
                    LOGGER.log(Level.INFO, null, e);
                }
                return null;
            } catch (MalformedURLException e) {
                try {
                    cid = URLEncoder.encode(ns, "UTF-8");
                } catch (UnsupportedEncodingException e1) {
                    throw new WebServiceException(e);
                }
            }
        }
        return name + cid;
    }
}