| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| package org.apache.impala.analysis; |
| |
| import org.apache.impala.authorization.User; |
| import org.apache.impala.common.AnalysisException; |
| import org.apache.impala.common.InternalException; |
| import org.apache.impala.thrift.TShowRolesParams; |
| import com.google.common.base.Preconditions; |
| |
| /** |
| * Represents "SHOW [CURRENT] ROLES" and "SHOW ROLE GRANT GROUP <groupName>" |
| * statements. |
| */ |
| public class ShowRolesStmt extends AuthorizationStmt { |
| // If null, all roles will be shown. Otherwise only roles granted to this |
| // group will be shown. |
| private final String groupName_; |
| private final boolean isShowCurrentRoles_; |
| |
| // Set during analysis. |
| private User requestingUser_; |
| |
| public ShowRolesStmt(boolean isShowCurrentRoles, String groupName) { |
| // An empty group name should never be possible since group name is an identifier |
| // and Impala does not allow empty identifiers. |
| Preconditions.checkState(!isShowCurrentRoles || |
| (groupName == null || !groupName.isEmpty())); |
| groupName_ = groupName; |
| isShowCurrentRoles_ = isShowCurrentRoles; |
| } |
| |
| @Override |
| public String toSql(ToSqlOptions options) { |
| if (groupName_ == null) { |
| return isShowCurrentRoles_ ? "SHOW CURRENT ROLES" : "SHOW ROLES"; |
| } else { |
| return "SHOW ROLE GRANT GROUP " + groupName_; |
| } |
| } |
| |
| public TShowRolesParams toThrift() throws InternalException { |
| TShowRolesParams params = new TShowRolesParams(); |
| params.setRequesting_user(requestingUser_.getShortName()); |
| params.setIs_show_current_roles(isShowCurrentRoles_); |
| if (groupName_ != null) params.setGrant_group(groupName_); |
| // Users should always be able to execute SHOW CURRENT ROLES. |
| return params; |
| } |
| |
| @Override |
| public void analyze(Analyzer analyzer) throws AnalysisException { |
| super.analyze(analyzer); |
| requestingUser_ = analyzer.getUser(); |
| } |
| } |