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kormushinkormushin
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Merge branch 'master' of https://github.com/dkomanov/fizteh-java-2014 into moskupols-04-JUnit-mergeable
2 parents 5d464e3 + 4d7add4 commit 61df373

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‎src/ru/fizteh/fivt/students/EgorLunichkin/MultiFileHashMap/Command.java‎

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package ru.fizteh.fivt.students.EgorLunichkin.MultiFileHashMap;
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public interface Command {
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void run() throws Exception;
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}

‎src/ru/fizteh/fivt/students/EgorLunichkin/MultiFileHashMap/CreateCommand.java‎

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package ru.fizteh.fivt.students.EgorLunichkin.MultiFileHashMap;
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import java.io.File;
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public class CreateCommand implements Command {
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public CreateCommand(MultiDataBase mdb, String name) {
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this.tableName = name;
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this.multiDataBase = mdb;
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}
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private String tableName;
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private MultiDataBase multiDataBase;
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public void run() throws Exception {
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if (multiDataBase.tables.containsKey(tableName)) {
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System.out.println(tableName + " exists");
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} else {
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File tableDirectory = new File(multiDataBase.dbDirectory, tableName);
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if (!tableDirectory.mkdir()) {
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throw new MultiFileHashMapException("Unable to create directory for new table");
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}
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multiDataBase.tables.put(tableName, new Table(tableDirectory));
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System.out.println("created");
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}
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}
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}

‎src/ru/fizteh/fivt/students/EgorLunichkin/MultiFileHashMap/DropCommand.java‎

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package ru.fizteh.fivt.students.EgorLunichkin.MultiFileHashMap;
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public class DropCommand implements Command {
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public DropCommand(MultiDataBase mdb, String name) {
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this.tableName = name;
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this.multiDataBase = mdb;
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}
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private String tableName;
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private MultiDataBase multiDataBase;
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public void run() throws MultiFileHashMapException {
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if (!multiDataBase.tables.containsKey(tableName)) {
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System.out.println(tableName + " not exists");
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} else {
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if (tableName.equals(multiDataBase.using)) {
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multiDataBase.using = null;
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}
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multiDataBase.tables.get(tableName).drop();
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multiDataBase.tables.remove(tableName);
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System.out.println("dropped");
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}
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}
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}

‎src/ru/fizteh/fivt/students/EgorLunichkin/MultiFileHashMap/Executor.java‎

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package ru.fizteh.fivt.students.EgorLunichkin.MultiFileHashMap;
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import java.util.Scanner;
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public class Executor {
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public Executor(String[] args) throws Exception {
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String dbPath = System.getProperty("fizteh.db.dir");
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multiDataBase = new MultiDataBase(dbPath);
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if (args.length == 0) {
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interactiveMode();
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} else {
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packageMode(args);
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}
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}
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private MultiDataBase multiDataBase;
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private void interactiveMode() throws Exception {
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Scanner in = new Scanner(System.in);
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System.out.print("$ ");
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while (in.hasNextLine()) {
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String[] commands = in.nextLine().trim().split(";");
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for (String command : commands) {
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executeCommand(command);
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}
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System.out.print("$ ");
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}
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in.close();
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System.out.close();
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}
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private void packageMode(String[] args) throws Exception {
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StringBuilder line = new StringBuilder();
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for (String arg : args) {
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line.append(arg + ' ');
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}
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String[] commands = line.toString().trim().split(";");
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for (String command : commands) {
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executeCommand(command);
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}
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}
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private void executeCommand(String cmd) throws Exception {
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String[] command = cmd.trim().split("\\s+");
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Command exec;
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switch (command[0]) {
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case "put":
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if (command.length > 3) {
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throw new MultiFileHashMapException("put: Too many arguments");
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}
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if (command.length < 3) {
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throw new MultiFileHashMapException("put: Too few arguments");
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}
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exec = new MultiPutCommand(multiDataBase, command[1], command[2]);
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break;
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case "get":
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if (command.length > 2) {
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throw new MultiFileHashMapException("get: Too many arguments");
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}
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if (command.length < 2) {
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throw new MultiFileHashMapException("get: Too few arguments");
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}
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exec = new MultiGetCommand(multiDataBase, command[1]);
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break;
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case "remove":
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if (command.length > 2) {
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throw new MultiFileHashMapException("remove: Too many arguments");
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}
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if (command.length < 2) {
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throw new MultiFileHashMapException("remove: Too few arguments");
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}
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exec = new MultiRemoveCommand(multiDataBase, command[1]);
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break;
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case "list":
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if (command.length > 1) {
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throw new MultiFileHashMapException("list: Too many arguments");
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}
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exec = new MultiListCommand(multiDataBase);
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break;
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case "create":
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if (command.length > 2) {
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throw new MultiFileHashMapException("create: Too many arguments");
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}
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if (command.length < 2) {
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throw new MultiFileHashMapException("create: Too few arguments");
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}
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exec = new CreateCommand(multiDataBase, command[1]);
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break;
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case "drop":
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if (command.length > 2) {
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throw new MultiFileHashMapException("drop: Too many arguments");
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}
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if (command.length < 2) {
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throw new MultiFileHashMapException("drop: Too few arguments");
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}
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exec = new DropCommand(multiDataBase, command[1]);
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break;
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case "use":
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if (command.length > 2) {
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throw new MultiFileHashMapException("use: Too many arguments");
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}
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if (command.length < 2) {
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throw new MultiFileHashMapException("use: Too few agruments");
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}
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exec = new UseCommand(multiDataBase, command[1]);
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break;
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case "show":
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if (command.length < 2 || !command[1].equals("tables")) {
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throw new MultiFileHashMapException("Unknown command");
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}
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if (command.length > 2) {
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throw new MultiFileHashMapException("show tables: Too many arguments");
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}
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exec = new ShowTablesCommand(multiDataBase);
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break;
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case "exit":
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if (command.length > 1) {
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throw new MultiFileHashMapException("exit: Too many arguments");
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}
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exec = new ExitCommand();
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break;
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default:
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throw new MultiFileHashMapException("Unknown command");
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}
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exec.run();
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}
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}

‎src/ru/fizteh/fivt/students/EgorLunichkin/MultiFileHashMap/ExitCommand.java‎

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package ru.fizteh.fivt.students.EgorLunichkin.MultiFileHashMap;
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public class ExitCommand implements Command {
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public ExitCommand() {}
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public void run() throws MultiFileHashMapException {
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System.exit(0);
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}
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}

‎src/ru/fizteh/fivt/students/EgorLunichkin/MultiFileHashMap/MultiDataBase.java‎

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package ru.fizteh.fivt.students.EgorLunichkin.MultiFileHashMap;
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import java.io.File;
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import java.nio.file.Files;
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import java.util.HashMap;
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public class MultiDataBase {
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public MultiDataBase(String dbDir) throws Exception {
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if (dbDir == null) {
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throw new MultiFileHashMapException("No database directory name specified");
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}
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dbDirectory = new File(dbDir);
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using = null;
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tables = new HashMap<String, Table>();
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if (!Files.exists(dbDirectory.toPath()) && !dbDirectory.mkdir()) {
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throw new MultiFileHashMapException("Cannot create working directory");
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}
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if (!dbDirectory.isDirectory()) {
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throw new MultiFileHashMapException("Specified path is not a directory");
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}
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for (String tableName : dbDirectory.list()) {
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File tableDirectory = new File(dbDirectory, tableName);
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if (tableDirectory.isDirectory()) {
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tables.put(tableName, new Table(tableDirectory));
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} else {
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throw new MultiFileHashMapException(tableName + " from database is not a directory");
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}
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}
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}
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public HashMap<String, Table> tables;
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public File dbDirectory;
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public String using;
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public Table getUsing() {
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return tables.get(using);
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}
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}

‎src/ru/fizteh/fivt/students/EgorLunichkin/MultiFileHashMap/MultiFileHashMapException.java‎

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package ru.fizteh.fivt.students.EgorLunichkin.MultiFileHashMap;
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public class MultiFileHashMapException extends Exception {
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public MultiFileHashMapException(String msg) {
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System.err.println(msg);
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System.exit(1);
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}
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}

‎src/ru/fizteh/fivt/students/EgorLunichkin/MultiFileHashMap/MultiFileHashMapMain.java‎

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package ru.fizteh.fivt.students.EgorLunichkin.MultiFileHashMap;
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public class MultiFileHashMapMain {
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public static void main(String[] args) throws Exception {
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new Executor(args);
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}
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}

‎src/ru/fizteh/fivt/students/EgorLunichkin/MultiFileHashMap/MultiGetCommand.java‎

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package ru.fizteh.fivt.students.EgorLunichkin.MultiFileHashMap;
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import ru.fizteh.fivt.students.EgorLunichkin.filemap.DataBase;
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import ru.fizteh.fivt.students.EgorLunichkin.filemap.GetCommand;
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public class MultiGetCommand implements Command {
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public MultiGetCommand(MultiDataBase mdb, String key) {
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this.key = key;
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this.multiDataBase = mdb;
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}
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private MultiDataBase multiDataBase;
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private String key;
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public void run() {
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if (multiDataBase.using == null) {
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System.out.println("no table");
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} else {
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int hashCode = Math.abs(key.hashCode());
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int dir = hashCode % 16;
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int file = hashCode / 16 % 16;
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DataBase dataBase = multiDataBase.getUsing().dataBases[dir][file];
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if (dataBase == null) {
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System.out.println("not found");
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} else {
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new GetCommand(dataBase, key).run();
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}
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}
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}
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}

‎src/ru/fizteh/fivt/students/EgorLunichkin/MultiFileHashMap/MultiListCommand.java‎

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package ru.fizteh.fivt.students.EgorLunichkin.MultiFileHashMap;
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import ru.fizteh.fivt.students.EgorLunichkin.filemap.DataBase;
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import ru.fizteh.fivt.students.EgorLunichkin.filemap.ListCommand;
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public class MultiListCommand implements Command {
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public MultiListCommand(MultiDataBase mdb) {
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this.multiDataBase = mdb;
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}
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private MultiDataBase multiDataBase;
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public void run() {
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if (multiDataBase.using == null) {
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System.out.println("no table");
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} else {
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StringBuilder listKeys = new StringBuilder();
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for (int dir = 0; dir < 16; ++dir) {
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for (int file = 0; file < 16; ++file) {
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DataBase dataBase = multiDataBase.getUsing().dataBases[dir][file];
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if (dataBase != null) {
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String curList = new ListCommand(dataBase).list();
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if (curList.length() > 0) {
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if (listKeys.length() > 0) {
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listKeys.append(", ");
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}
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listKeys.append(curList);
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}
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}
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}
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}
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System.out.println(listKeys.toString());
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}
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}
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}

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