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path: root/src/main/java/org/bukkit/command/defaults/GiveCommand.java
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package org.bukkit.command.defaults;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.apache.commons.lang.Validate;
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.util.StringUtil;

import com.google.common.collect.ImmutableList;

public class GiveCommand extends VanillaCommand {
    private static List<String> materials;
    static {
        ArrayList<String> materialList = new ArrayList<String>();
        for (Material material : Material.values()) {
            materialList.add(material.name());
        }
        Collections.sort(materialList);
        materials = ImmutableList.copyOf(materialList);
    }

    public GiveCommand() {
        super("give");
        this.description = "Gives the specified player a certain amount of items";
        this.usageMessage = "/give <player> <item> [amount [data]]";
        this.setPermission("bukkit.command.give");
    }

    @Override
    public boolean execute(CommandSender sender, String currentAlias, String[] args) {
        if (!testPermission(sender)) return true;
        if ((args.length < 2)) {
            sender.sendMessage(ChatColor.RED + "Usage: " + usageMessage);
            return false;
        }

        Player player = Bukkit.getPlayerExact(args[0]);

        if (player != null) {
            Material material = Material.matchMaterial(args[1]);

            if (material != null) {
                int amount = 1;
                short data = 0;

                if (args.length >= 3) {
                    amount = this.getInteger(sender, args[2], 1, 64);

                    if (args.length >= 4) {
                        try {
                            data = Short.parseShort(args[3]);
                        } catch (NumberFormatException ex) {}
                    }
                }

                player.getInventory().addItem(new ItemStack(material, amount, data));

                Command.broadcastCommandMessage(sender, "Gave " + player.getName() + " some " + material.getId() + " (" + material + ")");
            } else {
                sender.sendMessage("There's no item called " + args[1]);
            }
        } else {
            sender.sendMessage("Can't find user " + args[0]);
        }

        return true;
    }

    @Override
    public boolean matches(String input) {
        return input.equalsIgnoreCase("give");
    }

    @Override
    public List<String> tabComplete(CommandSender sender, String alias, String[] args) throws IllegalArgumentException {
        Validate.notNull(sender, "Sender cannot be null");
        Validate.notNull(args, "Arguments cannot be null");
        Validate.notNull(alias, "Alias cannot be null");

        if (args.length == 1) {
            return super.tabComplete(sender, alias, args);
        }
        if (args.length == 2) {
            final String arg = args[1];
            final List<String> materials = GiveCommand.materials;
            List<String> completion = null;

            final int size = materials.size();
            int i = Collections.binarySearch(materials, arg, String.CASE_INSENSITIVE_ORDER);

            if (i < 0) {
                // Insertion (start) index
                i = -1 - i;
            }

            for ( ; i < size; i++) {
                String material = materials.get(i);
                if (StringUtil.startsWithIgnoreCase(material, arg)) {
                    if (completion == null) {
                        completion = new ArrayList<String>();
                    }
                    completion.add(material);
                } else {
                    break;
                }
            }

            if (completion != null) {
                return completion;
            }
        }
        return ImmutableList.of();
    }
}