components/camel-google-mail/src/main/java/org/apache/camel/component/google/mail/GoogleMailComponent.java

/*
 * 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.camel.component.google.mail;

import com.google.api.services.gmail.Gmail;
import org.apache.camel.CamelContext;
import org.apache.camel.Endpoint;
import org.apache.camel.component.google.mail.internal.GoogleMailApiCollection;
import org.apache.camel.component.google.mail.internal.GoogleMailApiName;
import org.apache.camel.spi.Metadata;
import org.apache.camel.spi.annotations.Component;
import org.apache.camel.support.component.AbstractApiComponent;

/**
 * Represents the component that manages {@link GoogleMailEndpoint}.
 */
@Component("google-mail")
public class GoogleMailComponent extends AbstractApiComponent<GoogleMailApiName, GoogleMailConfiguration, GoogleMailApiCollection> {

    @Metadata(label = "advanced")
    private Gmail client;
    @Metadata(label = "advanced")
    private GoogleMailClientFactory clientFactory;

    public GoogleMailComponent() {
        super(GoogleMailEndpoint.class, GoogleMailApiName.class, GoogleMailApiCollection.getCollection());
        registerExtension(new GoogleMailComponentVerifierExtension());
    }

    public GoogleMailComponent(CamelContext context) {
        super(context, GoogleMailEndpoint.class, GoogleMailApiName.class, GoogleMailApiCollection.getCollection());
        registerExtension(new GoogleMailComponentVerifierExtension());
    }

    @Override
    protected GoogleMailApiName getApiName(String apiNameStr) throws IllegalArgumentException {
        return GoogleMailApiName.fromValue(apiNameStr);
    }

    public Gmail getClient(GoogleMailConfiguration googleMailConfiguration) {
        if (client == null) {
            client = getClientFactory().makeClient(googleMailConfiguration.getClientId(), googleMailConfiguration.getClientSecret(), 
                    googleMailConfiguration.getApplicationName(),
                    googleMailConfiguration.getRefreshToken(), googleMailConfiguration.getAccessToken());
        }
        return client;
    }

    public GoogleMailClientFactory getClientFactory() {
        if (clientFactory == null) {
            clientFactory = new BatchGoogleMailClientFactory();
        }
        return clientFactory;
    }

    /**
     * To use the shared configuration
     */
    @Override
    public void setConfiguration(GoogleMailConfiguration configuration) {
        super.setConfiguration(configuration);
    }

    @Override
    public GoogleMailConfiguration getConfiguration() {
        if (configuration == null) {
            configuration = new GoogleMailConfiguration();
        }
        return super.getConfiguration();
    }

    /**
     * To use the GoogleCalendarClientFactory as factory for creating the client.
     * Will by default use {@link BatchGoogleMailClientFactory}
     */
    public void setClientFactory(GoogleMailClientFactory clientFactory) {
        this.clientFactory = clientFactory;
    }

    @Override
    protected Endpoint createEndpoint(String uri, String methodName, GoogleMailApiName apiName, GoogleMailConfiguration endpointConfiguration) {
        endpointConfiguration.setApiName(apiName);
        endpointConfiguration.setMethodName(methodName);
        return new GoogleMailEndpoint(uri, this, apiName, methodName, endpointConfiguration);
    }
}