125 lines
3.8 KiB
Java
125 lines
3.8 KiB
Java
/*
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* This file is part of BlueMap, licensed under the MIT License (MIT).
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*
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* Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
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* Copyright (c) contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package de.bluecolored.bluemap.core.storage;
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import de.bluecolored.bluemap.core.storage.compression.CompressedInputStream;
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import lombok.Getter;
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import lombok.RequiredArgsConstructor;
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import org.jetbrains.annotations.Nullable;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.util.stream.Stream;
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/**
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* A storage storing items on an infinite grid (x,z), each position on the grid can hold one item.
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*/
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public interface GridStorage {
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/**
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* Returns an {@link OutputStream} that can be used to write an item into this storage at the given position
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* (overwriting any existing item).
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* The OutputStream is expected to be closed by the caller of this method.
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*/
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OutputStream write(int x, int z) throws IOException;
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/**
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* Returns a {@link CompressedInputStream} that can be used to read the item from this storage at the given position
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* or null if there is no item stored.
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* The CompressedInputStream is expected to be closed by the caller of this method.
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*/
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@Nullable CompressedInputStream read(int x, int z) throws IOException;
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/**
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* Deletes the item from this storage at the given position
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*/
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void delete(int x, int z) throws IOException;
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/**
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* Tests if there is an item stored on the given position in this storage
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*/
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boolean exists(int x, int z) throws IOException;
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/**
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* Returns a stream over all <b>existing</b> items in this storage
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*/
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Stream<Cell> stream() throws IOException;
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/**
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* Checks if this storage is closed
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*/
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boolean isClosed();
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interface Cell extends SingleItemStorage {
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/**
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* Returns the x position of this item in the grid
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*/
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int getX();
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/**
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* Returns the z position of this item in the grid
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*/
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int getZ();
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}
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@SuppressWarnings("ClassCanBeRecord")
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@Getter
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@RequiredArgsConstructor
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class GridStorageCell implements Cell {
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private final GridStorage storage;
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private final int x, z;
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@Override
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public OutputStream write() throws IOException {
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return storage.write(x, z);
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}
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@Override
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public CompressedInputStream read() throws IOException {
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return storage.read(x, z);
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}
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@Override
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public void delete() throws IOException {
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storage.delete(x, z);
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}
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@Override
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public boolean exists() throws IOException {
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return storage.exists(x, z);
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}
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@Override
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public boolean isClosed() {
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return storage.isClosed();
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}
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}
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}
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