| package edu.uci.ics.hyracks.dataflow.std.sort; |
| |
| /** |
| * @author pouria |
| * Defines a slot in the memory, which can be a free or used (allocated) |
| * slot. Memory is a set of frames, ordered as a list. Each tuple is |
| * stored in a slot, where the location of the slot is denoted by a pair |
| * of integers: |
| * - The index of the frame, in the list of frames in memory. (referred |
| * to as frameIx) |
| * - The starting offset of the slot, within that specific frame. |
| * (referred to as offset) |
| */ |
| public class Slot { |
| |
| private int frameIx; |
| private int offset; |
| |
| public Slot() { |
| this.frameIx = BSTNodeUtil.INVALID_INDEX; |
| this.offset = BSTNodeUtil.INVALID_INDEX; |
| } |
| |
| public Slot(int frameIx, int offset) { |
| this.frameIx = frameIx; |
| this.offset = offset; |
| } |
| |
| public void set(int frameIx, int offset) { |
| this.frameIx = frameIx; |
| this.offset = offset; |
| } |
| |
| public int getFrameIx() { |
| return frameIx; |
| } |
| |
| public void setFrameIx(int frameIx) { |
| this.frameIx = frameIx; |
| } |
| |
| public int getOffset() { |
| return offset; |
| } |
| |
| public void setOffset(int offset) { |
| this.offset = offset; |
| } |
| |
| public boolean isNull() { |
| return (frameIx == BSTNodeUtil.INVALID_INDEX) || (offset == BSTNodeUtil.INVALID_INDEX); |
| } |
| |
| public void clear() { |
| this.frameIx = BSTNodeUtil.INVALID_INDEX; |
| this.offset = BSTNodeUtil.INVALID_INDEX; |
| } |
| |
| public void copy(Slot s) { |
| this.frameIx = s.getFrameIx(); |
| this.offset = s.getOffset(); |
| } |
| |
| public String toString() { |
| return "(" + frameIx + ", " + offset + ")"; |
| } |
| } |