/**
* 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);
}
}
}
