public HashSet<Table> getTables() {
HashSet<Table> set = New.hashSet();
for (TableFilter filter : filters) {
set.add(filter.getTable());
}
return set;
}
private void checkDefaultReferencesTable(Expression defaultExpression) {
if (defaultExpression == null) {
return;
}
HashSet<DbObject> dependencies = New.hashSet();
ExpressionVisitor visitor = ExpressionVisitor.getDependenciesVisitor(dependencies);
defaultExpression.isEverything(visitor);
if (dependencies.contains(table)) {
throw DbException.get(ErrorCode.COLUMN_IS_REFERENCED_1, defaultExpression.getSQL());
}
}
/**
* Remember the result set and close it as soon as the transaction is committed (if it needs to be
* closed). This is done to delete temporary files as soon as possible, and free object ids of
* temporary tables.
*
* @param result the temporary result set
*/
public void addTemporaryResult(LocalResult result) {
if (!result.needToClose()) {
return;
}
if (temporaryResults == null) {
temporaryResults = New.hashSet();
}
if (temporaryResults.size() < 100) {
// reference at most 100 result sets to avoid memory problems
temporaryResults.add(result);
}
}
/** Encapsulates the connection settings, including user name and password. */
public class ConnectionInfo implements Cloneable {
private static final HashSet<String> KNOWN_SETTINGS = New.hashSet();
private Properties prop = new Properties(); // 里面的key都会自动转成大写
private String originalURL;
private String url;
private String user;
private byte[] filePasswordHash;
private byte[] fileEncryptionKey;
private byte[] userPasswordHash;
/** The database name */
private String name;
private String nameNormalized;
private boolean remote;
private boolean ssl;
private boolean persistent;
private boolean unnamed;
/**
* Create a connection info object.
*
* @param name the database name (including tags), but without the "jdbc:h2:" prefix
*/
public ConnectionInfo(String name) {
this.name = name;
this.url = Constants.START_URL + name; // 如jdbc:h2:mydb，没有tcp了，此时persistent也是true
parseName();
}
/**
* Create a connection info object.
*
* @param u the database URL (must start with jdbc:h2:)
* @param info the connection properties
*/
public ConnectionInfo(String u, Properties info) {
u = remapURL(u);
this.originalURL = u; // originalURL不会再变
if (!u.startsWith(Constants.START_URL)) { // "jdbc:h2:"
throw DbException.getInvalidValueException("url", u);
}
this.url = u; // url在接下来的代码中会再变，去掉参数
readProperties(info);
readSettingsFromURL();
setUserName(removeProperty("USER", ""));
convertPasswords();
// 去掉"jdbc:h2:"，比如jdbc:h2:tcp://localhost:9092/test9
// name = tcp://localhost:9092/test9
name = url.substring(Constants.START_URL.length());
parseName();
String recoverTest = removeProperty("RECOVER_TEST", null);
if (recoverTest != null) {
FilePathRec.register();
try {
Utils.callStaticMethod("org.h2.store.RecoverTester.init", recoverTest);
} catch (Exception e) {
throw DbException.convert(e);
}
name = "rec:" + name;
}
}
static {
ArrayList<String> list = SetTypes.getTypes();
HashSet<String> set = KNOWN_SETTINGS;
set.addAll(list);
String[] connectionTime = {
"ACCESS_MODE_DATA",
"AUTOCOMMIT",
"CIPHER",
"CREATE",
"CACHE_TYPE",
"FILE_LOCK",
"IGNORE_UNKNOWN_SETTINGS",
"IFEXISTS",
"INIT",
"PASSWORD",
"RECOVER",
"RECOVER_TEST",
"USER",
"AUTO_SERVER",
"AUTO_SERVER_PORT",
"NO_UPGRADE",
"AUTO_RECONNECT",
"OPEN_NEW",
"PAGE_SIZE",
"PASSWORD_HASH",
"JMX"
};
for (String key : connectionTime) {
if (SysProperties.CHECK && set.contains(key)) {
DbException.throwInternalError(key);
}
set.add(key);
}
}
private static boolean isKnownSetting(String s) {
return KNOWN_SETTINGS.contains(s);
}
@Override
public ConnectionInfo clone() throws CloneNotSupportedException {
ConnectionInfo clone = (ConnectionInfo) super.clone();
clone.prop = (Properties) prop.clone();
clone.filePasswordHash = Utils.cloneByteArray(filePasswordHash);
clone.fileEncryptionKey = Utils.cloneByteArray(fileEncryptionKey);
clone.userPasswordHash = Utils.cloneByteArray(userPasswordHash);
return clone;
}
private void parseName() {
if (".".equals(name)) {
name = "mem:";
}
if (name.startsWith("tcp:")) {
remote = true;
name = name.substring("tcp:".length());
} else if (name.startsWith("ssl:")) {
remote = true;
ssl = true;
name = name.substring("ssl:".length());
} else if (name.startsWith("mem:")) {
persistent = false;
if ("mem:".equals(name)) {
unnamed = true;
}
} else if (name.startsWith("file:")) {
name = name.substring("file:".length());
persistent = true;
} else {
persistent = true; // 等同于"file:name"，在ConnectionInfo(String name)传过来时就是数据库名，没有前缀，在client端是tcp
}
if (persistent && !remote) {
if ("/".equals(SysProperties.FILE_SEPARATOR)) {
name = name.replace('\\', '/');
} else {
name = name.replace('/', '\\');
}
}
}
/**
* Set the base directory of persistent databases, unless the database is in the user home folder
* (~).
*
* @param dir the new base directory
*/
public void setBaseDir(String dir) {
if (persistent) {
String absDir = FileUtils.unwrap(FileUtils.toRealPath(dir));
boolean absolute = FileUtils.isAbsolute(name);
String n;
String prefix = null;
if (dir.endsWith(SysProperties.FILE_SEPARATOR)) {
dir = dir.substring(0, dir.length() - 1);
}
if (absolute) {
n = name;
} else {
n = FileUtils.unwrap(name);
prefix = name.substring(0, name.length() - n.length()); // 比如nio:./test，此时prefix就是"nio:"
n = dir + SysProperties.FILE_SEPARATOR + n;
}
String normalizedName = FileUtils.unwrap(FileUtils.toRealPath(n));
if (normalizedName.equals(absDir) || !normalizedName.startsWith(absDir)) {
// database name matches the baseDir or
// database name is clearly outside of the baseDir
throw DbException.get(ErrorCode.IO_EXCEPTION_1, normalizedName + " outside " + absDir);
}
if (absDir.endsWith("/") || absDir.endsWith("\\")) {
// no further checks are needed for C:/ and similar
} else if (normalizedName.charAt(absDir.length()) != '/') {
// database must be within the directory
// (with baseDir=/test, the database name must not be
// /test2/x and not /test2)
throw DbException.get(ErrorCode.IO_EXCEPTION_1, normalizedName + " outside " + absDir);
}
if (!absolute) {
// 可能是个bug，应该用absDir替换dir，
// 否则当设置了baseDir时，还是不能用没有jdbc:h2:mydb这样的url，
// 但是在getName()中还是抛错，并且错误信息提示设置baseDir
name = prefix + dir + SysProperties.FILE_SEPARATOR + FileUtils.unwrap(name);
}
}
}
/**
* Check if this is a remote connection.
*
* @return true if it is
*/
public boolean isRemote() {
return remote;
}
/**
* Check if the referenced database is persistent.
*
* @return true if it is
*/
public boolean isPersistent() {
return persistent;
}
/**
* Check if the referenced database is an unnamed in-memory database.
*
* @return true if it is
*/
boolean isUnnamedInMemory() {
return unnamed;
}
private void readProperties(Properties info) {
Object[] list = new Object[info.size()];
info.keySet().toArray(list);
DbSettings s = null;
// 可在info中配三种参数，相关文档见:E:\H2\my-h2\my-h2-docs\999 可配置的参数汇总.java中的1、2、3项
for (Object k : list) {
String key = StringUtils.toUpperEnglish(k.toString());
if (prop.containsKey(key)) {
throw DbException.get(ErrorCode.DUPLICATE_PROPERTY_1, key);
}
Object value = info.get(k);
// 支持org.h2.command.dml.SetTypes中的参数和ConnectionInfo与connectionTime相关的参数
if (isKnownSetting(key)) {
prop.put(key, value);
} else {
if (s == null) {
s = getDbSettings();
}
// org.h2.constant.DbSettings中的参数
if (s.containsKey(key)) {
prop.put(key, value);
}
}
}
}
private void readSettingsFromURL() {
// 如url=jdbc:h2:tcp://localhost:9092/test9;optimize_distinct=true;early_filter=true;nested_joins=false
DbSettings defaultSettings = DbSettings.getDefaultSettings();
int idx = url.indexOf(';'); // 用";"号来分隔参数，第一个";"号表明url和参数的分界，之后的";"号用来分隔多个参数
if (idx >= 0) {
// optimize_distinct=true;early_filter=true;nested_joins=false
String settings = url.substring(idx + 1);
// jdbc:h2:tcp://localhost:9092/test9
url = url.substring(0, idx);
// [optimize_distinct=true, early_filter=true, nested_joins=false]
String[] list = StringUtils.arraySplit(settings, ';', false);
for (String setting : list) {
if (setting.length() == 0) {
continue;
}
int equal = setting.indexOf('=');
if (equal < 0) {
throw getFormatException();
}
String value = setting.substring(equal + 1);
String key = setting.substring(0, equal);
key = StringUtils.toUpperEnglish(key);
// info中除了可以配三种参数外(相关文档见:E:\H2\my-h2\my-h2-docs\999 可配置的参数汇总.java中的1、2、3项)
// 还可以配其他参数，但是被忽略
// 但是url中只能配三种参数
if (!isKnownSetting(key) && !defaultSettings.containsKey(key)) {
throw DbException.get(ErrorCode.UNSUPPORTED_SETTING_1, key);
}
// 不能与info中的参数重复(如果值相同就不会报错)
// 例子见my.test.ConnectionInfoTest
String old = prop.getProperty(key);
if (old != null && !old.equals(value)) {
throw DbException.get(ErrorCode.DUPLICATE_PROPERTY_1, key);
}
prop.setProperty(key, value);
}
}
}
private char[] removePassword() {
Object p = prop.remove("PASSWORD");
if (p == null) {
return new char[0];
} else if (p instanceof char[]) {
// 例如:
// Properties prop = new Properties();
// prop.put("password", new char[]{});
// 因为Properties继承了java.util.Hashtable<K, V>
// 可以调用java.util.Hashtable.put(Object, Object)
return (char[]) p;
} else {
return p.toString().toCharArray();
}
}
/**
* Split the password property into file password and user password if necessary, and convert them
* to the internal hash format.
*/
private void convertPasswords() {
char[] password = removePassword();
boolean passwordHash =
removeProperty("PASSWORD_HASH", false); // 如果PASSWORD_HASH参数是true那么不再进行SHA256
// 如果配置了CIPHER，则password包含两部份，用一个空格分开这两部份，第一部份是filePassword，第二部份是userPassword。
// 如果PASSWORD_HASH参数是true那么不再进行SHA256，此时必须使用16进制字符，字符个数是偶数。
// 如果PASSWORD_HASH参数是false，不必是16进制字符，会按SHA256算法进行hash
if (getProperty("CIPHER", null) != null) {
// split password into (filePassword+' '+userPassword)
int space = -1;
for (int i = 0, len = password.length; i < len; i++) {
if (password[i] == ' ') {
space = i;
break;
}
}
if (space < 0) {
throw DbException.get(ErrorCode.WRONG_PASSWORD_FORMAT);
}
char[] np = new char[password.length - space - 1];
char[] filePassword = new char[space];
System.arraycopy(password, space + 1, np, 0, np.length);
System.arraycopy(password, 0, filePassword, 0, space);
Arrays.fill(password, (char) 0);
password = np;
// filePasswordHash用"file"进行hash
fileEncryptionKey = FilePathEncrypt.getPasswordBytes(filePassword);
filePasswordHash = hashPassword(passwordHash, "file", filePassword);
}
// userPasswordHash用用户名进行hash
userPasswordHash = hashPassword(passwordHash, user, password);
}
private static byte[] hashPassword(boolean passwordHash, String userName, char[] password) {
// 如果PASSWORD_HASH参数是true那么不再进行SHA256vn
if (passwordHash) {
return StringUtils.convertHexToBytes(new String(password));
}
if (userName.length() == 0 && password.length == 0) {
return new byte[0];
}
// 会生成32个字节，32*8刚好是256 bit，刚好对应SHA256的名字
return SHA256.getKeyPasswordHash(userName, password);
}
/**
* Get a boolean property if it is set and return the value.
*
* @param key the property name
* @param defaultValue the default value
* @return the value
*/
boolean getProperty(String key, boolean defaultValue) {
String x = getProperty(key, null);
if (x == null) {
return defaultValue;
}
// support 0 / 1 (like the parser)
if (x.length() == 1 && Character.isDigit(x.charAt(0))) {
return Integer.parseInt(x) != 0;
}
return Boolean.parseBoolean(x);
}
/**
* Remove a boolean property if it is set and return the value.
*
* @param key the property name
* @param defaultValue the default value
* @return the value
*/
public boolean removeProperty(String key, boolean defaultValue) {
String x = removeProperty(key, null);
return x == null ? defaultValue : Boolean.parseBoolean(x);
}
/**
* Remove a String property if it is set and return the value.
*
* @param key the property name
* @param defaultValue the default value
* @return the value
*/
String removeProperty(String key, String defaultValue) {
if (SysProperties.CHECK && !isKnownSetting(key)) {
DbException.throwInternalError(key);
}
Object x = prop.remove(key);
return x == null ? defaultValue : x.toString();
}
/**
* Get the unique and normalized database name (excluding settings).
*
* @return the database name
*/
public String getName() {
if (!persistent) {
return name;
}
if (nameNormalized == null) {
if (!SysProperties.IMPLICIT_RELATIVE_PATH) {
if (!FileUtils.isAbsolute(name)) {
if (name.indexOf("./") < 0
&& name.indexOf(".\\") < 0
&& name.indexOf(":/") < 0
&& name.indexOf(":\\") < 0) {
// the name could start with "./", or
// it could start with a prefix such as "nio:./"
// for Windows, the path "\test" is not considered
// absolute as the drive letter is missing,
// but we consider it absolute
throw DbException.get(ErrorCode.URL_RELATIVE_TO_CWD, originalURL);
}
}
}
String suffix = Constants.SUFFIX_PAGE_FILE;
String n;
if (FileUtils.exists(name + suffix)) {
n = FileUtils.toRealPath(name + suffix);
} else {
suffix = Constants.SUFFIX_MV_FILE;
n = FileUtils.toRealPath(name + suffix);
}
String fileName = FileUtils.getName(n);
if (fileName.length() < suffix.length() + 1) { // 例如: 没有设置baseDir且dbName="./"时
throw DbException.get(ErrorCode.INVALID_DATABASE_NAME_1, name);
}
nameNormalized = n.substring(0, n.length() - suffix.length());
}
return nameNormalized;
}
/**
* Get the file password hash if it is set.
*
* @return the password hash or null
*/
public byte[] getFilePasswordHash() {
return filePasswordHash;
}
byte[] getFileEncryptionKey() {
return fileEncryptionKey;
}
/**
* Get the name of the user.
*
* @return the user name
*/
public String getUserName() {
return user;
}
/**
* Get the user password hash.
*
* @return the password hash
*/
byte[] getUserPasswordHash() {
return userPasswordHash;
}
/**
* Get the property keys.
*
* @return the property keys
*/
String[] getKeys() {
String[] keys = new String[prop.size()];
prop.keySet().toArray(keys);
return keys;
}
/**
* Get the value of the given property.
*
* @param key the property key
* @return the value as a String
*/
String getProperty(String key) {
Object value = prop.get(key);
if (value == null || !(value instanceof String)) {
return null;
}
return value.toString();
}
/**
* Get the value of the given property.
*
* @param key the property key
* @param defaultValue the default value
* @return the value as a String
*/
int getProperty(String key, int defaultValue) {
if (SysProperties.CHECK && !isKnownSetting(key)) {
DbException.throwInternalError(key);
}
String s = getProperty(key);
return s == null ? defaultValue : Integer.parseInt(s);
}
/**
* Get the value of the given property.
*
* @param key the property key
* @param defaultValue the default value
* @return the value as a String
*/
public String getProperty(String key, String defaultValue) {
if (SysProperties.CHECK && !isKnownSetting(key)) {
DbException.throwInternalError(key);
}
String s = getProperty(key);
return s == null ? defaultValue : s;
}
/**
* Get the value of the given property.
*
* @param setting the setting id
* @param defaultValue the default value
* @return the value as a String
*/
String getProperty(int setting, String defaultValue) {
String key = SetTypes.getTypeName(setting);
String s = getProperty(key);
return s == null ? defaultValue : s;
}
/**
* Get the value of the given property.
*
* @param setting the setting id
* @param defaultValue the default value
* @return the value as an integer
*/
int getIntProperty(int setting, int defaultValue) {
String key = SetTypes.getTypeName(setting);
String s = getProperty(key, null);
try {
return s == null ? defaultValue : Integer.decode(s);
} catch (NumberFormatException e) {
return defaultValue;
}
}
/**
* Check if this is a remote connection with SSL enabled.
*
* @return true if it is
*/
boolean isSSL() {
return ssl;
}
/**
* Overwrite the user name. The user name is case-insensitive and stored in uppercase. English
* conversion is used.
*
* @param name the user name
*/
public void setUserName(String name) {
this.user = StringUtils.toUpperEnglish(name);
}
/**
* Set the user password hash.
*
* @param hash the new hash value
*/
public void setUserPasswordHash(byte[] hash) {
this.userPasswordHash = hash;
}
/**
* Set the file password hash.
*
* @param hash the new hash value
*/
public void setFilePasswordHash(byte[] hash) {
this.filePasswordHash = hash;
}
public void setFileEncryptionKey(byte[] key) {
this.fileEncryptionKey = key;
}
/**
* Overwrite a property.
*
* @param key the property name
* @param value the value
*/
public void setProperty(String key, String value) {
// value is null if the value is an object
if (value != null) {
prop.setProperty(key, value);
}
}
/**
* Get the database URL.
*
* @return the URL
*/
public String getURL() {
return url;
}
/**
* Get the complete original database URL.
*
* @return the database URL
*/
public String getOriginalURL() {
return originalURL;
}
/**
* Set the original database URL.
*
* @param url the database url
*/
public void setOriginalURL(String url) {
originalURL = url;
}
/**
* Generate an URL format exception.
*
* @return the exception
*/
DbException getFormatException() {
String format = Constants.URL_FORMAT;
return DbException.get(ErrorCode.URL_FORMAT_ERROR_2, format, url);
}
/**
* Switch to server mode, and set the server name and database key.
*
* @param serverKey the server name, '/', and the security key
*/
public void setServerKey(String serverKey) {
remote = true;
persistent = false;
this.name = serverKey;
}
public DbSettings getDbSettings() {
DbSettings defaultSettings = DbSettings.getDefaultSettings();
HashMap<String, String> s = New.hashMap();
for (Object k : prop.keySet()) {
String key = k.toString();
if (!isKnownSetting(key) && defaultSettings.containsKey(key)) {
s.put(key, prop.getProperty(key));
}
}
return DbSettings.getInstance(s);
}
private static String remapURL(String url) {
// 比如System.setProperty("h2.urlMap", "E:/H2/my-h2/my-h2-src/my/test/h2.urlMap.properties");
// 假设url="my.url"，那么可以在h2.urlMap.properties中重新映射:
// my.url=my.url=jdbc:h2:tcp://localhost:9092/test9
// 最后返回的url实际是jdbc:h2:tcp://localhost:9092/test9
String urlMap = SysProperties.URL_MAP;
if (urlMap != null && urlMap.length() > 0) {
try {
SortedProperties prop;
prop = SortedProperties.loadProperties(urlMap);
String url2 = prop.getProperty(url);
if (url2 == null) {
prop.put(url, "");
prop.store(urlMap);
} else {
url2 = url2.trim();
if (url2.length() > 0) {
return url2;
}
}
} catch (IOException e) {
throw DbException.convert(e);
}
}
return url;
}
}