components/camel-twitter/src/main/java/org/apache/camel/component/twitter/timeline/TwitterTimelineEndpoint.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.twitter.timeline;

import org.apache.camel.Consumer;
import org.apache.camel.Processor;
import org.apache.camel.Producer;
import org.apache.camel.component.twitter.AbstractTwitterEndpoint;
import org.apache.camel.component.twitter.TwitterConfiguration;
import org.apache.camel.component.twitter.TwitterHelper;
import org.apache.camel.component.twitter.consumer.AbstractTwitterConsumerHandler;
import org.apache.camel.component.twitter.data.TimelineType;
import org.apache.camel.spi.Metadata;
import org.apache.camel.spi.UriEndpoint;
import org.apache.camel.spi.UriParam;
import org.apache.camel.spi.UriPath;

/**
 * The Twitter Timeline component consumes twitter timeline or update the status of specific user.
 */
@UriEndpoint(firstVersion = "2.10.0", scheme = "twitter-timeline", title = "Twitter Timeline", syntax = "twitter-timeline:timelineType",
    label = "api,social")
public class TwitterTimelineEndpoint extends AbstractTwitterEndpoint {

    @UriPath(description = "The timeline type to produce/consume.")
    @Metadata(required = true)
    private TimelineType timelineType;
    @UriParam(description = "The username when using timelineType=user")
    private String user;

    public TwitterTimelineEndpoint(String uri, String remaining, String user, TwitterTimelineComponent component, TwitterConfiguration properties) {
        super(uri, component, properties);
        if (remaining == null) {
            throw new IllegalArgumentException(String.format("The timeline type must be specified for '%s'", uri));
        }
        this.timelineType = component.getCamelContext().getTypeConverter().convertTo(TimelineType.class, remaining);
        this.user = user;
    }

    @Override
    public Producer createProducer() throws Exception {
        switch (timelineType) {
        case USER:
            return new UserProducer(this);
        default:
            throw new IllegalArgumentException("Cannot create any producer with uri " + getEndpointUri()
                                               + ". A producer type was not provided (or an incorrect pairing was used).");
        }
    }

    @Override
    public Consumer createConsumer(Processor processor) throws Exception {
        AbstractTwitterConsumerHandler handler = null;
        switch (timelineType) {
        case HOME:
            handler = new HomeConsumerHandler(this);
            break;
        case MENTIONS:
            handler = new MentionsConsumerHandler(this);
            break;
        case RETWEETSOFME:
            handler = new RetweetsConsumerHandler(this);
            break;
        case USER:
            if (user == null || user.trim().isEmpty()) {
                throw new IllegalArgumentException("Fetch type set to USER TIMELINE but no user was set.");
            } else {
                handler = new UserConsumerHandler(this, user);
                break;
            }
        default:
            break;
        }
        if (handler != null) {
            return TwitterHelper.createConsumer(processor, this, handler);
        }
        throw new IllegalArgumentException("Cannot create any consumer with uri " + getEndpointUri()
                                           + ". A consumer type was not provided (or an incorrect pairing was used).");
        
    }

    public TimelineType getTimelineType() {
        return timelineType;
    }

}