token.java

用Java写的彩信的程序。包括wsp／mime／mms几部分。

/* 
 * JVending - J2ME MMS Client
 *
 * Distributed under Apache style software license included with the source code.
 */

package org.jvending.messaging.wsp.tokens;

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

public class Token {

    public static final TokenType MULTI_OCTET_INTEGER = new TokenType("MULTI_OCTET_INTEGER");

    public static final TokenType UINTVAR_INTEGER = new TokenType("UINTVAR_INTEGER");

    public static final TokenType QUOTED_STRING = new TokenType("QUOTED_STRING");

    public static final TokenType TEXT_STRING = new TokenType("TEXT_STRING");

    public static final TokenType EXTENSION_MEDIA = new TokenType("EXTENSION_MEDIA");

    public static final TokenType SHORT_INTEGER = new TokenType("SHORT_INTEGER");

    public static final TokenType SHORT_LENGTH = new TokenType("SHORT_LENGTH");

    public static final TokenType DATA_OCTETS = new TokenType("DATA_OCTETS");

    public static final TokenType EOF = new TokenType("EOF");

    protected TokenType tokenType;

    protected Object tokenObject;

    //can tell everything about token type based upon the first octet

    public Token(TokenType tokenType, Object tokenObject) {
        this.tokenType = tokenType;
        this.tokenObject = tokenObject;
    }

    public String getStringValue() {
        if(tokenObject instanceof String)
            return (String) tokenObject;
        else
            return null;
    }

    public int getIntValue() {
        if(tokenObject instanceof Integer)
            return ((Integer) tokenObject).intValue();
        else
            return -1;        
    }

    public long getLongValue() {
        if(tokenObject instanceof Long)
            return ((Long) tokenObject).longValue();
        else
            return -11;        
    }

    public int[] getOctets() {
        if(tokenObject instanceof int[])
            return ( (int[]) tokenObject);
        else
            return null;    
    }

    public boolean isQuotedString() {
        return tokenType == QUOTED_STRING;
    }

    public boolean isMultiOctetInteger() {
        return tokenType == MULTI_OCTET_INTEGER;
    }

    public boolean isTextString() {
        return tokenType == TEXT_STRING;
    }

    public boolean isExtensionMedia() {
        return tokenType == EXTENSION_MEDIA;
    }

    public boolean isShortInteger() {
        return tokenType == SHORT_INTEGER;
    }

    public boolean isUintvarInteger() {
        return tokenType == UINTVAR_INTEGER;
    } 

    public boolean isShortLength() {
        return tokenType == SHORT_LENGTH;
    } 

    public boolean isEndOfFile() {
        return tokenType == EOF;
    }

    public String toString() {
        return (tokenType + " : " + tokenObject);
    }

}