| package li.cil.oc.api; |
| |
| import li.cil.oc.api.detail.Builder; |
| import li.cil.oc.api.network.Environment; |
| import li.cil.oc.api.network.Node; |
| import li.cil.oc.api.network.Packet; |
| import li.cil.oc.api.network.Visibility; |
| import li.cil.oc.api.network.WirelessEndpoint; |
| import net.minecraft.nbt.NBTTagCompound; |
| import net.minecraft.tileentity.TileEntity; |
| |
| /** |
| * This class provides factories for networks and nodes. |
| * <p/> |
| * The first two functions provided provided by this API are to allow existing |
| * environments - implemented in a tile entity for example - to join an existing |
| * network or create new ones. The third one is used to create nodes that may |
| * then be connected to an existing network. It is not possible to create |
| * networks that do not belong to at least one tile entity or node. |
| * <p/> |
| * It is important to understand that component networks only exist on the |
| * server side. It is impossible to create nodes, and therefore networks, on |
| * the client side. This is to enforce a clear distinction of where the actual |
| * logic lies - since user code only runs on the server. |
| * <p/> |
| * Note that these methods should <em>not</em> be called in the pre-init phase, |
| * since the {@link li.cil.oc.api.API#network} may not have been initialized |
| * at that time. Only start calling these methods in the init phase or later. |
| */ |
| public final class Network { |
| /** |
| * Tries to add a tile entity's network node(s) at the specified coordinates |
| * to adjacent networks. |
| * <p/> |
| * If the tile entity implements {@link Environment} its one node will be |
| * connected to any existing adjacent tile entity nodes. If none exist a |
| * new network with the specified tile entity's node as its sole entry. |
| * <p/> |
| * If the tile entity is a {@link li.cil.oc.api.network.SidedEnvironment} |
| * the same rules as for simple environments apply, except that the |
| * respective for each side is used when connecting, and each side's node |
| * is added to its own new network, if necessary. |
| * |
| * @param tileEntity the tile entity to initialize. |
| */ |
| public static void joinOrCreateNetwork(final TileEntity tileEntity) { |
| if (API.network != null) |
| API.network.joinOrCreateNetwork(tileEntity); |
| } |
| |
| /** |
| * Creates a new network with the specified node as its initial node. |
| * <p/> |
| * This can be used to create networks that are not bound to any tile |
| * entity. For example, this is used to create the internal networks of |
| * robots. |
| * |
| * @param node the node to create the network for. |
| * @throws IllegalArgumentException if the node already is in a network. |
| */ |
| public static void joinNewNetwork(final Node node) { |
| if (API.network != null) |
| API.network.joinNewNetwork(node); |
| } |
| |
| // ----------------------------------------------------------------------- // |
| |
| /** |
| * Makes a wireless endpoint join the wireless network defined by the mod. |
| * <p/> |
| * OpenComputers tracks endpoints to which to send wireless packets sent |
| * via the {@link #sendWirelessPacket(WirelessEndpoint, double, Packet)} |
| * method. The packets will <em>only</em> be sent to endpoints registered |
| * with the network. |
| * <p/> |
| * <em>Important</em>: when your endpoint is removed from the world, |
| * <em>you must ensure it is also removed from the network</em>! |
| * |
| * @param endpoint the endpoint to register with the network. |
| */ |
| public static void joinWirelessNetwork(final WirelessEndpoint endpoint) { |
| if (API.network != null) |
| API.network.joinWirelessNetwork(endpoint); |
| } |
| |
| /** |
| * Updates a wireless endpoint in the wireless network. |
| * <p/> |
| * This is more efficient than removing and then adding the node again, as |
| * it only performs the update if the position significantly changed since |
| * the last time the position was updated (more than 0.5 along any axis). |
| * <p/> |
| * Calling this for an endpoint that was not added before does nothing. |
| * |
| * @param endpoint the endpoint for which to update the position. |
| */ |
| public static void updateWirelessNetwork(final WirelessEndpoint endpoint) { |
| if (API.network != null) |
| API.network.updateWirelessNetwork(endpoint); |
| } |
| |
| /** |
| * Removes a wireless endpoint from the wireless network. |
| * <p/> |
| * This must be called when an endpoint becomes invalid, otherwise it will |
| * remain in the network! |
| * <p/> |
| * Calling this for an endpoint that was not added before does nothing. |
| * |
| * @param endpoint the endpoint to remove from the wireless network. |
| */ |
| public static void leaveWirelessNetwork(final WirelessEndpoint endpoint) { |
| if (API.network != null) |
| API.network.leaveWirelessNetwork(endpoint); |
| } |
| |
| /** |
| * Sends a packet via the wireless network. |
| * <p/> |
| * This will look for all other registered wireless endpoints in range of |
| * the sender and submit the packets to them. Whether another end point is |
| * reached depends on the distance and potential obstacles between the |
| * sender and the receiver (harder blocks require a stronger signal to be |
| * penetrated). |
| * |
| * @param source the endpoint that is sending the message. |
| * @param strength the signal strength with which to send the packet. |
| * @param packet the packet to send. |
| */ |
| public static void sendWirelessPacket(final WirelessEndpoint source, final double strength, final Packet packet) { |
| if (API.network != null) |
| API.network.sendWirelessPacket(source, strength, packet); |
| } |
| |
| // ----------------------------------------------------------------------- // |
| |
| /** |
| * Factory function for creating new nodes. |
| * <p/> |
| * Use this to create a node for your environment (e.g. tile entity). This |
| * will return a builder that can be used to further specialize the node, |
| * making it either a component node (for callbacks), a connector node |
| * (for power interaction) or both. |
| * <p/> |
| * Example use: |
| * <pre> |
| * class YourThing extends TileEntity implements Environment { |
| * private ComponentConnector node_ = |
| * api.Network.newNode(this, Visibility.Network). |
| * withComponent("your_thing"). |
| * withConnector(32). |
| * create(); |
| * |
| * public Node node() { return node_; } |
| * |
| * // ... |
| * } |
| * </pre> |
| * <p/> |
| * Note that the <em>reachability</em> specified here is the general |
| * availability of the created node to other nodes in the network. Special |
| * rules apply to components, which have a <em>visibility</em> that is used |
| * to control how they can be reached from computers. For example, network |
| * cards have a <em>reachability</em> of <tt>Visibility.Network</tt>, to |
| * allow them to communicate with each other, but a <em>visibility</em> of |
| * <tt>Visibility.Neighbors</tt> to avoid other computers in the network |
| * to see the card (i.e. only the user programs running on the computer the |
| * card installed in can see interact with it). |
| * |
| * @param host the environment the node is created for. |
| * @param reachability the reachability of the node. |
| * @return a new node builder. |
| */ |
| public static Builder.NodeBuilder newNode(final Environment host, final Visibility reachability) { |
| if (API.network != null) |
| return API.network.newNode(host, reachability); |
| return null; |
| } |
| |
| /** |
| * Creates a new network packet as it would be sent or received by a |
| * network card. |
| * <p/> |
| * These packets can be forwarded by switches and access points. For wired |
| * transmission they must be sent over a node's send method, with the |
| * message name being <tt>network.message</tt>. |
| * |
| * @param source the address of the sending node. |
| * @param destination the address of the destination, or <tt>null</tt> |
| * for a broadcast. |
| * @param port the port to send the packet to. |
| * @param data the payload of the packet. |
| * @return the new packet. |
| */ |
| public static Packet newPacket(final String source, final String destination, final int port, final Object[] data) { |
| if (API.network != null) |
| return API.network.newPacket(source, destination, port, data); |
| return null; |
| } |
| |
| /** |
| * Re-creates a network packet from a previously stored state. |
| * |
| * @param nbt the tag to load the packet from. |
| * @return the loaded packet. |
| */ |
| public static Packet newPacket(final NBTTagCompound nbt) { |
| if (API.network != null) |
| return API.network.newPacket(nbt); |
| return null; |
| } |
| |
| // ----------------------------------------------------------------------- // |
| |
| private Network() { |
| } |
| } |