private static boolean isIri(String string) { int indexColon = string.indexOf(':'); int indexEquals = string.indexOf(XDIConstants.CS_EQUALS.charValue()); int indexAt = string.indexOf(XDIConstants.CS_AT.charValue()); int indexPlus = string.indexOf(XDIConstants.CS_PLUS.charValue()); int indexDollar = string.indexOf(XDIConstants.CS_DOLLAR.charValue()); int indexStar = string.indexOf(XDIConstants.CS_STAR.charValue()); int indexBang = string.indexOf(XDIConstants.CS_BANG.charValue()); if (indexColon == -1) return false; if (indexEquals != -1 && indexEquals < indexColon) return false; if (indexAt != -1 && indexAt < indexColon) return false; if (indexPlus != -1 && indexPlus < indexColon) return false; if (indexDollar != -1 && indexDollar < indexColon) return false; if (indexStar != -1 && indexStar < indexColon) return false; if (indexBang != -1 && indexBang < indexColon) return false; return true; }