modulespec.java

jpeg2000算法实现

            case SPEC_TYPE_TILE:
                errMsg += "components as it is a 'tile only' specific option";
                break;
            case SPEC_TYPE_COMP:
                errMsg += "tiles as it is a 'component only' specific option";
                break;
            }
            throw new Error(errMsg);
        }
	if(tileCompVal==null)
	    tileCompVal = new Hashtable();
	specValType[t][c] = SPEC_TILE_COMP; 
	tileCompVal.put("t"+t+"c"+c,value);
    }

    /** 
     * Gets value of specified tile-component. This method calls getSpec but
     * has a public access.
     *
     * @param t Tile index 
     *
     * @param c Component index 
     *
     * @return The value of this tile-component (Must be casted before use)
     *
     * @see #setTileCompVal
     *
     * @see #getSpec 
     * */
    public Object getTileCompVal(int t,int c){
        if ( specType != SPEC_TYPE_TILE_COMP ) {
            throw new Error("Illegal use of ModuleSpec class");
        }
	return getSpec(t,c);	
    }

    /** 
     * Gets value of specified tile-component without knowing if a
     * specific tile-component value has been previously entered. It
     * first check if a tile-component specific value has been
     * entered, then if a tile specific value exist, then if a
     * component specific value exist. If not the default value is
     * returned.
     *
     * @param t Tile index
     *
     * @param c Component index
     *
     * @return Value for this tile component.
     * */
    protected Object getSpec(int t,int c){
	switch(specValType[t][c]){
	case SPEC_DEF:
	    return getDefault();
	case SPEC_COMP_DEF:
	    return getCompDef(c);
	case SPEC_TILE_DEF:
	    return getTileDef(t);
	case SPEC_TILE_COMP:
	    return tileCompVal.get("t"+t+"c"+c);
	default:
	    throw new IllegalArgumentException("Not recognized spec type");
	}
    }

    /** 
     * Return the spec type of the given tile-component.
     *
     * @param t Tile index
     *
     * @param c Component index
     * */
    public byte getSpecValType(int t,int c){
	return specValType[t][c];
    }

    /** 
     * Whether or not specifications have been entered for the given
     * component.
     *
     * @param c Index of the component
     *
     * @return True if component specification has been defined
     * */
    public boolean isCompSpecified(int c){
	if(compDef==null || compDef[c]==null)
	    return false;
	else
	    return true;
    }

    /** 
     * Whether or not specifications have been entered for the given
     * tile.
     *
     * @param t Index of the tile
     *
     * @return True if tile specification has been entered
     * */
    public boolean isTileSpecified(int t){
	if(tileDef==null || tileDef[t]==null)
	    return false;
	else
	    return true;
    }

    /** 
     * Whether or not a tile-component specification has been defined
     *
     * @param t Tile index
     *
     * @param c Component index
     *
     * @return True if a tile-component specification has been defined.
     * */
    public boolean isTileCompSpecified(int t,int c){
	if(tileCompVal==null || tileCompVal.get("t"+t+"c"+c)==null)
	    return false;
	else
	    return true;
    }

    /** 
     * This method is responsible of parsing tile indexes set and
     * component indexes set for an option. Such an argument must
     * follow the following policy:<br>
     * 
     * <tt>t\<indexes set\></tt> or <tt>c\<indexes set\></tt> where
     * tile or component indexes are separated by commas or a
     * dashes.
     *
     * <p><u>Example:</u><br>
     * <li> <tt>t0,3,4</tt> means tiles with indexes 0, 3 and 4.<br>
     * <li> <tt>t2-4</tt> means tiles with indexes 2,3 and 4.<br>
     *
     * It returns a boolean array skteching which tile or component are
     * concerned by the next parameters.
     *
     * @param word The word to parse.
     *
     * @param maxIdx Maximum authorized index
     *
     * @return Indexes concerned by this parameter.
     * */
    public static final boolean[] parseIdx(String word, int maxIdx){
	int nChar = word.length(); // Number of characters
	char c = word.charAt(0);   // current character
	int idx = -1;              // Current (tile or component) index
	int lastIdx = -1;          // Last (tile or component) index
	boolean isDash = false;    // Whether or not last separator was a dash

	boolean[] idxSet = new boolean[maxIdx];
	int i=1; // index of the current character

	while(i<nChar){
	    c = word.charAt(i);
	    if(Character.isDigit(c)){
		if(idx==-1)
		    idx = 0;
		idx = idx*10+ (c-'0');
	    }
	    else{
		if(idx==-1 || (c!=',' && c!='-')){
		   throw new IllegalArgumentException("Bad construction for "+
						      "parameter: "+word); 
		}
		if(idx<0 || idx>=maxIdx){
		    throw new IllegalArgumentException("Out of range index in "+
						       "parameter `"+word+"' : "+
						       +idx); 
		}

		// Found a comma
		if(c==','){
		    if(isDash){ // Previously found a dash, fill idxSet
			for(int j=lastIdx+1; j<idx; j++){
			    idxSet[j] = true;
			}
		    }
		    isDash = false;
		}
		else // Found a dash
		    isDash = true;

		// Udate idxSet
		idxSet[idx] = true;
		lastIdx = idx;
		idx=-1;
	    }
	    i++;
	}

	// Process last found index
	if(idx<0 || idx>=maxIdx){
	    throw new IllegalArgumentException("Out of range index in "+
					       "parameter `"+word+"' : "+idx);
	}
	if(isDash)
	    for(int j=lastIdx+1; j<idx; j++){
		idxSet[j] = true;
	    }
	idxSet[idx] = true;

	return idxSet;
    }

    /** 
     * Returns a tile-component representative using default value.
     *
     * @return Tile component index in an array (first element: tile
     * index, second element: component index).
     * */
    public int[] getDefRep(){
	int[] tcidx = new int[2];
	for(int t=nTiles-1; t>=0; t--){
	    for(int c=nComp-1; c>=0; c--){
		if(specValType[t][c]==SPEC_DEF){
		    tcidx[0] = t;
		    tcidx[1] = c;
		    return tcidx;
		}
	    }
	}
		    
        throw new IllegalArgumentException("No representative for "+
                                           "default value");
    }

    /** 
     * Returns a component representative using tile default value.
     *
     * @param t Tile index
     *
     * @return component index of the representant
     * */
    public int getTileDefRep(int t){
	for(int c=nComp-1; c>=0; c--)
	    if(specValType[t][c]==SPEC_TILE_DEF){
		return c;
	    }
		    
	throw new IllegalArgumentException("No representative for tile "+
					   "default value");
    }

    /** 
     * Returns a tile representative using component default value.
     *
     * @param c Component index
     *
     * @return tile index of the representant
     * */
    public int getCompDefRep(int c){
	for(int t=nTiles-1; t>=0; t--) {
	    if(specValType[t][c]==SPEC_COMP_DEF){
		return t;
	    }
        }
		    
	throw new IllegalArgumentException("No representative for component "+
					   "default value, c="+c);
    }

}