/**
* Creates a new array with from copying oldA and removing 'length' entries at position pos. The
* old array is returned to the pool.
*
* @param oldA old array
* @param dstPos destination
* @param length length
* @return new array
*/
public static long[] arrayRemove(long[] oldA, int dstPos, int length) {
long[] ret = arrayCreate(oldA.length - length);
arraycopy(oldA, 0, ret, 0, dstPos);
arraycopy(oldA, dstPos + length, ret, dstPos, ret.length - dstPos);
POOL.offer(oldA);
return ret;
}
/**
* Reads a long array from a stream.
*
* @param in input stream
* @return the long array.
* @throws IOException if reading fails
*/
public static long[] read(ObjectInput in) throws IOException {
int size = in.readInt();
long[] ret = POOL.getArray(size);
for (int i = 0; i < size; i++) {
ret[i] = in.readLong();
}
return ret;
}
/**
* Creates a new array with from copying oldA and inserting insertA at position pos. The old array
* is returned to the pool.
*
* @param oldA old array
* @param insertA array to insert
* @param dstPos destination position
* @return new array
*/
public static long[] insertArray(long[] oldA, long[] insertA, int dstPos) {
long[] ret = arrayCreate(oldA.length + insertA.length);
arraycopy(oldA, 0, ret, 0, dstPos);
arraycopy(insertA, 0, ret, dstPos, insertA.length);
arraycopy(oldA, dstPos, ret, dstPos + insertA.length, oldA.length - dstPos);
POOL.offer(oldA);
return ret;
}
/**
* Replaces an array with another array. The replaced array is returned to the pool.
*
* @param oldA old array
* @param newA new array
* @return new array
*/
public static long[] arrayReplace(long[] oldA, long[] newA) {
if (oldA != null) {
POOL.offer(oldA);
}
return newA;
}
/**
* Create an array.
*
* @param size size
* @return a new array
*/
public static long[] arrayCreate(int size) {
return POOL.getArray(calcArraySize(size));
}