/*
 * 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 io.prestosql.plugin.jdbc;

import io.airlift.configuration.Config;
import io.airlift.configuration.ConfigSecuritySensitive;

import javax.annotation.Nullable;
import javax.validation.constraints.NotNull;

public class BaseJdbcConfig
{
    private String connectionUrl;
    private String connectionUser;
    private String connectionPassword;
    private String userCredentialName;
    private String passwordCredentialName;

    @NotNull
    public String getConnectionUrl()
    {
        return connectionUrl;
    }

    @Config("connection-url")
    public BaseJdbcConfig setConnectionUrl(String connectionUrl)
    {
        this.connectionUrl = connectionUrl;
        return this;
    }

    public String getConnectionUser()
    {
        return connectionUser;
    }

    @Config("connection-user")
    public BaseJdbcConfig setConnectionUser(String connectionUser)
    {
        this.connectionUser = connectionUser;
        return this;
    }

    public String getConnectionPassword()
    {
        return connectionPassword;
    }

    @Config("connection-password")
    @ConfigSecuritySensitive
    public BaseJdbcConfig setConnectionPassword(String connectionPassword)
    {
        this.connectionPassword = connectionPassword;
        return this;
    }
    
    @Nullable
    public String getUserCredentialName()
    {
        return userCredentialName;
    }

    @Config("user-credential-name")
    public BaseJdbcConfig setUserCredentialName(String userCredentialName)
    {
        this.userCredentialName = userCredentialName;
        return this;
    }

    @Nullable
    public String getPasswordCredentialName()
    {
        return passwordCredentialName;
    }

    @Config("password-credential-name")
    public BaseJdbcConfig setPasswordCredentialName(String passwordCredentialName)
    {
        this.passwordCredentialName = passwordCredentialName;
        return this;
    }
}

/*
 * 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 io.prestosql.plugin.jdbc;

import io.airlift.configuration.Config;
import io.airlift.configuration.ConfigSecuritySensitive;

import javax.annotation.Nullable;
import javax.validation.constraints.NotNull;

public class BaseJdbcConfig
{
    private String connectionUrl;
    private String connectionUser;
    private String connectionPassword;
    private String userCredentialName;
    private String passwordCredentialName;

    @NotNull
    public String getConnectionUrl()
    {
        return connectionUrl;
    }

    @Config("connection-url")
    public BaseJdbcConfig setConnectionUrl(String connectionUrl)
    {
        this.connectionUrl = connectionUrl;
        return this;
    }

    @Nullable
    public String getConnectionUser()
    {
        return connectionUser;
    }

    @Config("connection-user")
    public BaseJdbcConfig setConnectionUser(String connectionUser)
    {
        this.connectionUser = connectionUser;
        return this;
    }

    @Nullable
    public String getConnectionPassword()
    {
        return connectionPassword;
    }

    @Config("connection-password")
    @ConfigSecuritySensitive
    public BaseJdbcConfig setConnectionPassword(String connectionPassword)
    {
        this.connectionPassword = connectionPassword;
        return this;
    }

    @Nullable
    public String getUserCredentialName()
    {
        return userCredentialName;
    }

    @Config("user-credential-name")
    public BaseJdbcConfig setUserCredentialName(String userCredentialName)
    {
        this.userCredentialName = userCredentialName;
        return this;
    }

    @Nullable
    public String getPasswordCredentialName()
    {
        return passwordCredentialName;
    }

    @Config("password-credential-name")
    public BaseJdbcConfig setPasswordCredentialName(String passwordCredentialName)
    {
        this.passwordCredentialName = passwordCredentialName;
        return this;
    }
}

Add Nullable annotation in BaseJdbcConfig