public String createFileName(Exchange exchange) {
String answer;
// overrule takes precedence
Object value;
Object overrule = exchange.getIn().getHeader(Exchange.OVERRULE_FILE_NAME);
if (overrule != null) {
if (overrule instanceof Expression) {
value = overrule;
} else {
value =
exchange.getContext().getTypeConverter().convertTo(String.class, exchange, overrule);
}
} else {
value = exchange.getIn().getHeader(Exchange.FILE_NAME);
}
// if we have an overrule then override the existing header to use the overrule computed name
// from this point forward
if (overrule != null) {
exchange.getIn().setHeader(Exchange.FILE_NAME, value);
}
if (value != null
&& value instanceof String
&& StringHelper.hasStartToken((String) value, "simple")) {
log.warn(
"Simple expression: {} detected in header: {} of type String. This feature has been removed (see CAMEL-6748).",
value,
Exchange.FILE_NAME);
}
// expression support
Expression expression = endpoint.getFileName();
if (value != null && value instanceof Expression) {
expression = (Expression) value;
}
// evaluate the name as a String from the value
String name;
if (expression != null) {
log.trace("Filename evaluated as expression: {}", expression);
name = expression.evaluate(exchange, String.class);
} else {
name = exchange.getContext().getTypeConverter().convertTo(String.class, exchange, value);
}
// flatten name
if (name != null && endpoint.isFlatten()) {
// check for both windows and unix separators
int pos = Math.max(name.lastIndexOf("/"), name.lastIndexOf("\\"));
if (pos != -1) {
name = name.substring(pos + 1);
}
}
// compute path by adding endpoint starting directory
String endpointPath = endpoint.getConfiguration().getDirectory();
String baseDir = "";
if (endpointPath.length() > 0) {
// Its a directory so we should use it as a base path for the filename
// If the path isn't empty, we need to add a trailing / if it isn't already there
baseDir = endpointPath;
boolean trailingSlash = endpointPath.endsWith("/") || endpointPath.endsWith("\\");
if (!trailingSlash) {
baseDir += getFileSeparator();
}
}
if (name != null) {
answer = baseDir + name;
} else {
// use a generated filename if no name provided
answer = baseDir + endpoint.getGeneratedFileName(exchange.getIn());
}
if (endpoint.getConfiguration().needToNormalize()) {
// must normalize path to cater for Windows and other OS
answer = normalizePath(answer);
}
return answer;
}
