/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package mime_large.server;

import javax.jws.WebService;
import javax.xml.ws.Holder;
import javax.xml.ws.WebServiceException;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import java.io.*;

import com.sun.xml.ws.developer.StreamingDataHandler;

/**
 * @author Jitendra Kotamraju
 */

@WebService (endpointInterface = "mime_large.server.Hello")
public class HelloImpl {

    public ClaimFormTypeResponse claimForm(ClaimFormTypeRequest data) {
        try {
    	    validateDataHandler(data.getTotal(), data.getRequest());
        } catch(IOException ioe) {
            throw new WebServiceException(ioe);
        }

        ClaimFormTypeResponse resp = new ClaimFormTypeResponse();
        resp.setTotal(data.getTotal()+1);
        resp.setResponse(getDataHandler(data.getTotal()+1));
        return resp;
    }

    private DataHandler getDataHandler(final int total)  {
        return new DataHandler(new DataSource() {
            public InputStream getInputStream() throws IOException {
                return new InputStream() {
                    int i;

                    @Override
                    public int read() throws IOException {
                        return i<total ? 'A'+(i++%26) : -1;
                    }
                };
            }

            public OutputStream getOutputStream() throws IOException {
                return null;
            }

            public String getContentType() {
                return "application/octet-stream";
            }

            public String getName() {
                return "";
            }
        });
    }

    private void validateDataHandler(int expTotal, DataHandler dh) throws IOException {
        // readOnce() doesn't store attachment on the disk in some cases
        // for e.g when only one attachment is in the message
        StreamingDataHandler sdh = (StreamingDataHandler)dh;
        InputStream in = sdh.readOnce();
        byte[] buf = new byte[8192];
        int total = 0;
        int len;
        while((len=in.read(buf, 0, buf.length)) != -1) {
            for(int i=0; i < len; i++) {
                if ((byte)('A'+(total+i)%26) != buf[i]) {
                    throw new WebServiceException("DataHandler data is different");
                }
            }
            total += len;
            if (total%(8192*250) == 0) {
            	System.out.println("Total so far="+total);
            }
        }
        in.close();
        sdh.close();
        if (total != expTotal) {
           throw new WebServiceException("DataHandler data size is different");
        }
    }
}
