Role.java

/*
 * Copyright 2014-2015 the original author or authors
 *
 * Licensed 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 com.wplatform.ddal.dbobject;

import com.wplatform.ddal.engine.Database;
import com.wplatform.ddal.engine.Session;
import com.wplatform.ddal.message.Trace;

/**
 * Represents a role. Roles can be granted to users, and to other roles.
 */
public class Role extends RightOwner {

    private final boolean system;

    public Role(Database database, int id, String roleName, boolean system) {
        super(database, id, roleName, Trace.USER);
        this.system = system;
    }

    /**
     * Get the CREATE SQL statement for this object.
     *
     * @param ifNotExists true if IF NOT EXISTS should be used
     * @return the SQL statement
     */
    public String getCreateSQL(boolean ifNotExists) {
        if (system) {
            return null;
        }
        StringBuilder buff = new StringBuilder("CREATE ROLE ");
        if (ifNotExists) {
            buff.append("IF NOT EXISTS ");
        }
        buff.append(getSQL());
        return buff.toString();
    }

    @Override
    public int getType() {
        return DbObject.ROLE;
    }

    @Override
    public void removeChildrenAndResources(Session session) {
        for (User user : database.getAllUsers()) {
            Right right = user.getRightForRole(this);
            if (right != null) {
                database.removeDatabaseObject(session, right);
            }
        }
        for (Role r2 : database.getAllRoles()) {
            Right right = r2.getRightForRole(this);
            if (right != null) {
                database.removeDatabaseObject(session, right);
            }
        }
        for (Right right : database.getAllRights()) {
            if (right.getGrantee() == this) {
                database.removeDatabaseObject(session, right);
            }
        }
        invalidate();
    }

    @Override
    public void checkRename() {
        // ok
    }

}