/**
* Compare the content of two Resources. A nonexistent Resource's content is "less than" that of
* an existing Resource; a directory-type Resource's content is "less than" that of a file-type
* Resource.
*
* @param r1 the Resource whose content is to be compared.
* @param r2 the other Resource whose content is to be compared.
* @param text true if the content is to be treated as text and differences in kind of line break
* are to be ignored.
* @return a negative integer, zero, or a positive integer as the first argument is less than,
* equal to, or greater than the second.
* @throws IOException if the Resources cannot be read.
* @since Ant 1.7
*/
public static int compareContent(Resource r1, Resource r2, boolean text) throws IOException {
if (r1.equals(r2)) {
return 0;
}
boolean e1 = r1.isExists();
boolean e2 = r2.isExists();
if (!(e1 || e2)) {
return 0;
}
if (e1 != e2) {
return e1 ? 1 : -1;
}
boolean d1 = r1.isDirectory();
boolean d2 = r2.isDirectory();
if (d1 && d2) {
return 0;
}
if (d1 || d2) {
return d1 ? -1 : 1;
}
return text ? textCompare(r1, r2) : binaryCompare(r1, r2);
}
/**
* Compares the contents of two Resources.
*
* @param r1 the Resource whose content is to be compared.
* @param r2 the other Resource whose content is to be compared.
* @param text true if the content is to be treated as text and differences in kind of line break
* are to be ignored.
* @return true if the content of the Resources is the same.
* @throws IOException if the Resources cannot be read.
* @since Ant 1.7
*/
public static boolean contentEquals(Resource r1, Resource r2, boolean text) throws IOException {
if (r1.isExists() != r2.isExists()) {
return false;
}
if (!r1.isExists()) {
// two not existing files are equal
return true;
}
// should the following two be switched? If r1 and r2 refer to the same file,
// isn't their content equal regardless of whether that file is a directory?
if (r1.isDirectory() || r2.isDirectory()) {
// don't want to compare directory contents for now
return false;
}
if (r1.equals(r2)) {
return true;
}
if (!text && r1.getSize() != r2.getSize()) {
return false;
}
return compareContent(r1, r2, text) == 0;
}