/*
* Copyright 2004-2010 H2 Group. Multiple-Licensed under the H2 License,
* Version 1.0, and under the Eclipse Public License, Version 1.0
* (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.command.ddl;
import java.util.ArrayList;
import org.h2.constant.ErrorCode;
import org.h2.engine.Database;
import org.h2.engine.Right;
import org.h2.engine.RightOwner;
import org.h2.engine.Role;
import org.h2.engine.Session;
import org.h2.message.DbException;
import org.h2.table.Table;
import org.h2.util.New;
/**
* This class represents the statements
* GRANT RIGHT,
* GRANT ROLE,
* REVOKE RIGHT,
* REVOKE ROLE
*/
public class GrantRevoke extends DefineCommand {
/**
* The operation type to grant a right.
*/
public static final int GRANT = 0;
/**
* The operation type to revoke a right.
*/
public static final int REVOKE = 1;
private ArrayList<String> roleNames;
private int operationType;
private int rightMask;
private ArrayList<Table> tables = New.arrayList();
private RightOwner grantee;
public GrantRevoke(Session session) {
super(session);
}
public void setOperationType(int operationType) {
this.operationType = operationType;
}
/**
* Add the specified right bit to the rights bitmap.
*
* @param right the right bit
*/
public void addRight(int right) {
this.rightMask |= right;
}
/**
* Add the specified role to the list of roles.
*
* @param roleName the role
*/
public void addRoleName(String roleName) {
if (roleNames == null) {
roleNames = New.arrayList();
}
roleNames.add(roleName);
}
public void setGranteeName(String granteeName) {
Database db = session.getDatabase();
grantee = db.findUser(granteeName);
if (grantee == null) {
grantee = db.findRole(granteeName);
if (grantee == null) {
throw DbException.get(ErrorCode.USER_OR_ROLE_NOT_FOUND_1, granteeName);
}
}
}
public int update() {
session.getUser().checkAdmin();
session.commit(true);
Database db = session.getDatabase();
if (roleNames != null) {
for (String name : roleNames) {
Role grantedRole = db.findRole(name);
if (grantedRole == null) {
throw DbException.get(ErrorCode.ROLE_NOT_FOUND_1, name);
}
if (operationType == GRANT) {
grantRole(grantedRole);
} else if (operationType == REVOKE) {
revokeRole(grantedRole);
} else {
DbException.throwInternalError("type=" + operationType);
}
}
} else {
if (operationType == GRANT) {
grantRight();
} else if (operationType == REVOKE) {
revokeRight();
} else {
DbException.throwInternalError("type=" + operationType);
}
}
return 0;
}
private void grantRight() {
Database db = session.getDatabase();
for (Table table : tables) {
Right right = grantee.getRightForTable(table);
if (right == null) {
int id = getObjectId();
right = new Right(db, id, grantee, rightMask, table);
grantee.grantRight(table, right);
db.addDatabaseObject(session, right);
} else {
right.setRightMask(right.getRightMask() | rightMask);
}
}
}
private void grantRole(Role grantedRole) {
if (grantedRole != grantee && grantee.isRoleGranted(grantedRole)) {
return;
}
if (grantee instanceof Role) {
Role granteeRole = (Role) grantee;
if (grantedRole.isRoleGranted(granteeRole)) {
// cyclic role grants are not allowed
throw DbException.get(ErrorCode.ROLE_ALREADY_GRANTED_1, grantedRole.getSQL());
}
}
Database db = session.getDatabase();
int id = getObjectId();
Right right = new Right(db, id, grantee, grantedRole);
db.addDatabaseObject(session, right);
grantee.grantRole(grantedRole, right);
}
private void revokeRight() {
for (Table table : tables) {
Right right = grantee.getRightForTable(table);
if (right == null) {
continue;
}
int mask = right.getRightMask();
int newRight = mask & ~rightMask;
Database db = session.getDatabase();
if (newRight == 0) {
db.removeDatabaseObject(session, right);
} else {
right.setRightMask(newRight);
db.update(session, right);
}
}
}
private void revokeRole(Role grantedRole) {
Right right = grantee.getRightForRole(grantedRole);
if (right == null) {
return;
}
Database db = session.getDatabase();
db.removeDatabaseObject(session, right);
}
public boolean isTransactional() {
return false;
}
/**
* Add the specified table to the list of tables.
*
* @param table the table
*/
public void addTable(Table table) {
tables.add(table);
}
}