private static String expand()

in src/java/org/apache/fulcrum/yaafi/framework/util/ConfigurationUtil.java [122:199]
65 lines of code
10 McCabe index (conditional complexity)

    private static String expand(String argStr, Map<?, ?> vars)
    {
    	// ignore failures
    	boolean isLenient = true;
    	
    	StringBuilder argBuf = new StringBuilder();
        int argStrLength = argStr.length();

        for (int cIdx = 0 ; cIdx < argStrLength;)
        {
            char ch = argStr.charAt(cIdx);
            char del = ' ';

            switch (ch)
            {
                case '$':
                    StringBuilder nameBuf = new StringBuilder();
                    del = argStr.charAt(cIdx+1);
                    if( del == '{')
                    {
                        cIdx++;

                        for (++cIdx ; cIdx < argStr.length(); ++cIdx)
                        {
                            ch = argStr.charAt(cIdx);
                            if (ch != '}')
                                nameBuf.append(ch);
                            else
                                break;
                        }

                        if (nameBuf.length() > 0)
                        {
                            Object value = vars.get(nameBuf.toString());

                            if (value != null)
                            {
                                argBuf.append(value.toString());
                            }
                            else
                            {
                                if (!isLenient)
                                {
                                    throw new RuntimeException("No value found for : " + nameBuf );
                                }
                                else
                                {
                                    argBuf.append("${").append(nameBuf).append("}");
                                }
                            }

                            del = argStr.charAt(cIdx);

                            if( del != '}')
                            {
                                throw new RuntimeException("Delimineter not found for : " + nameBuf );
                            }
                        }

                        cIdx++;
                    }
                    else
                    {
                        argBuf.append(ch);
                        ++cIdx;
                    }

                    break;

                default:
                    argBuf.append(ch);
                    ++cIdx;
                    break;
            }
        }

        return argBuf.toString();    	
    }