Something like this:
MyFixedLengthStringBuilder sb = new MyFixedLengthStringBuilder(2);
sb.append("123"); // <=== throws ArrayIndexOfOutBoundsException!
The rest would be exactly the same. Basically I need a StringBuilder that can never grow.
I see that StringBuilder is final so it can not be extended. Delegation sounds like my only path here. Do you see any other hack/idea/solution for my need?
If I could create my own class, it would go something like this and based on requirements more things could be added
public class MyFixedLengthStringBuilder {
StringBuilder sb;
int size;
public MyFixedLengthStringBuilder(int size) {
if(size < 0)
throw new IllegalArgumentException();
this.size = size;
sb = new StringBuilder(size);
}
public void append(String str) {
sb.append(str);
if(sb.length() > size) {
sb.setLength(size);
throw new ArrayIndexOutOfBoundsException();
}
}
}