/**
* Reads the file that specifies method calls that should be replaced by other method calls. The
* file is of the form:
*
* <p>[regex] [orig-method-def] [new-method-name]
*
* <p>where the orig_method-def is of the form:
*
* <p>fully-qualified-method-name (args)
*
* <p>Blank lines and // comments are ignored. The orig-method-def is replaced by a call to
* new-method-name with the same arguments in any classfile that matches the regular expressions.
* All method names and argument types should be fully qualified.
*/
public void read_map_file(File map_file) throws IOException {
LineNumberReader lr = new LineNumberReader(new FileReader(map_file));
MapFileError mfe = new MapFileError(lr, map_file);
Pattern current_regex = null;
Map<MethodDef, MethodInfo> map = new LinkedHashMap<MethodDef, MethodInfo>();
for (String line = lr.readLine(); line != null; line = lr.readLine()) {
line = line.replaceFirst("//.*$", "");
if (line.trim().length() == 0) continue;
if (line.startsWith(" ")) {
if (current_regex == null)
throw new IOException("No current class regex on line " + lr.getLineNumber());
StrTok st = new StrTok(line, mfe);
st.stok.wordChars('.', '.');
MethodDef md = parse_method(st);
String new_method = st.need_word();
map.put(md, new MethodInfo(new_method));
} else {
if (current_regex != null) {
MethodMapInfo mmi = new MethodMapInfo(current_regex, map);
map_list.add(mmi);
map = new LinkedHashMap<MethodDef, MethodInfo>();
}
current_regex = Pattern.compile(line);
}
}
if (current_regex != null) {
MethodMapInfo mmi = new MethodMapInfo(current_regex, map);
map_list.add(mmi);
}
dump_map_list();
}
/**
* Parse a method declaration. The declaration should be in the following format:
*
* <p>fully-qualified-method-name (args)
*
* <p>where the arguments are comma separated and all arguments other than primitives should have
* fully qualified names. Arrays are indicating by trailing brackets. For example:
*
* <p>int int[] int[][] java.lang.String java.util.Date[]
*
* <p>The arguments are translated into BCEL types and a MethodDef is returned.
*/
private MethodDef parse_method(StrTok st) {
// Get the method name
String method_name = st.need_word();
// Get the opening paren
st.need("(");
// Read the arguments
ArrayList<String> args = new ArrayList<String>();
String tok = st.nextToken();
if (tok != ")") {
st.pushBack();
do {
tok = st.need_word();
args.add(tok);
} while (st.nextToken() == ",");
st.pushBack();
st.need(")");
}
// Convert the arguments to Type
Type[] targs = new Type[args.size()];
for (int ii = 0; ii < args.size(); ii++) {
targs[ii] = BCELUtil.classname_to_type(args.get(ii));
}
return new MethodDef(method_name, targs);
}
