@NotNull
public static char[] adaptiveLoadText(@NotNull Reader reader) throws IOException {
char[] chars = new char[4096];
List<char[]> buffers = null;
int count = 0;
int total = 0;
while (true) {
int n = reader.read(chars, count, chars.length - count);
if (n <= 0) break;
count += n;
if (total > 1024 * 1024 * 10) throw new FileTooBigException("File too big " + reader);
total += n;
if (count == chars.length) {
if (buffers == null) {
buffers = new ArrayList<char[]>();
}
buffers.add(chars);
int newLength = Math.min(1024 * 1024, chars.length * 2);
chars = new char[newLength];
count = 0;
}
}
char[] result = new char[total];
if (buffers != null) {
for (char[] buffer : buffers) {
System.arraycopy(buffer, 0, result, result.length - total, buffer.length);
total -= buffer.length;
}
}
System.arraycopy(chars, 0, result, result.length - total, total);
return result;
}
@NotNull
public static String loadTextAndClose(@NotNull Reader reader) throws IOException {
try {
return StringFactory.createShared(adaptiveLoadText(reader));
} finally {
reader.close();
}
}