Revert "BAEL-4134"

data-structures/src/main/java/com/baeldung/circularbuffer/CircularBuffer.java

@@ -0,0 +1,75 @@
+package com.baeldung.circularbuffer;
+
+public class CircularBuffer<E> {
+
+    private static final int DEFAULT_CAPACITY = 8;
+
+    private final int capacity;
+    private final E[] data;
+    private volatile int writeSequence, readSequence;
+
+    @SuppressWarnings("unchecked")
+    public CircularBuffer(int capacity) {
+
+        this.capacity = (capacity < 1) ? DEFAULT_CAPACITY : capacity;
+        this.data = (E[]) new Object[capacity];
+
+        this.readSequence = 0;
+        this.writeSequence = -1;
+    }
+
+    public boolean offer(E element) {
+
+        if (isNotFull()) {
+
+            int nextWriteSeq = writeSequence + 1;
+            data[nextWriteSeq % capacity] = element;
+
+            writeSequence++;
+            return true;
+        }
+
+        return false;
+    }
+
+    public E poll() {
+
+        if (isNotEmpty()) {
+
+            E nextValue = data[readSequence % capacity];
+            readSequence++;
+            return nextValue;
+        }
+
+        return null;
+    }
+
+    public int capacity() {
+        return capacity;
+    }
+
+    public int size() {
+
+        return (writeSequence - readSequence) + 1;
+    }
+
+    public boolean isEmpty() {
+
+        return writeSequence < readSequence;
+    }
+
+    public boolean isFull() {
+
+        return size() >= capacity;
+    }
+    
+    private boolean isNotEmpty() {
+
+        return !isEmpty();
+    }
+
+    private boolean isNotFull() {
+
+        return !isFull();
+    }
+}