multimediaparser.java

Messaging- MIDP的是一个彩信客户端

/*
 *  JVending - J2ME MMS Client
 *  Copyright (C) 2004  Shane Isbell
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.jvending.messaging.impl.mms;

import java.io.IOException;
import java.util.NoSuchElementException;

import org.jvending.messaging.MultimediaMessage;

import org.jvending.messaging.impl.io.PeekInputStream;

/**
 * @author Shane Isbell
 * @version 1.0.0a
 * @created 04/03/27
 */

public class MultimediaParser {

    public void parse(PeekInputStream pis, Object targetObject) {
        MultimediaMessage mmm = (MultimediaMessage) targetObject;
        HeaderFieldParser hfp = new HeaderFieldParser();
        MimeParser mimeParser = new MimeParser();
        hfp.parse(pis, mmm);
        try {
            if (pis.peekByte(1) != -1) mimeParser.parse(pis, mmm);
        } catch(IOException e) {
            e.printStackTrace();
        }
    }

    private class HeaderFieldParser {

        private WspTokenizer tokenizer;

        private boolean moreFields = true;

        private HeaderFieldAssembler hfa;

        private PeekInputStream pis;

        public void parse(PeekInputStream pis, Object targetObject) {
            this.pis = pis;
            MultimediaMessage mmm = (MultimediaMessage) targetObject;

            tokenizer = new WspTokenizer(pis);
            tokenizer.setDataOctetTokenizer(new MmsDataOctetTokenizer());
            hfa = new HeaderFieldAssembler();
            hfa.setTokenizer(tokenizer);

            try {
                Field field = null;
                while(this.hasMoreFields()) {
                    field = this.getNextField();
                    if(field != null) mmm.setHeader(field.getName(), field.getValue());
                }
            } catch(Exception e) {
                e.printStackTrace();
                System.out.println("FieldType:" + fieldType +":" + "WspTokenType:" + wspTokenType);
            }
        }

        private int fieldType;
        private WspToken wspTokenType;

        //FIX ME!!!!!: Need to include Non-Encoded Headers
        private Field getNextField() throws NoSuchElementException, IOException {
            if(this.tokenizer == null) throw new NoSuchElementException("Tokenizer is null");
            wspTokenType = (WspToken) tokenizer.nextElement();
            fieldType = wspTokenType.getIntValue();
            if(fieldType == -1) {//HACK: Skip unencoded headers
                if(pis.peekByte(1) == -1) {
                  moreFields = false; //end this guy
                } //false alarm: Just String type
                return null;
            }
            Field field = hfa.getField(fieldType);
            if(field == null) moreFields = false;//FIX-ME: A Hack - don't like the way this is handled
            else if(field.getName().equals("CONTENT_TYPE")) moreFields = false;
            return field;
        }

        private boolean hasMoreFields() {
            return moreFields;
        }
    }

}