/**
* 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.facebook.data;
import java.lang.reflect.Field;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import facebook4j.Reading;
import org.apache.camel.Exchange;
import org.apache.camel.component.facebook.FacebookConstants;
import org.apache.camel.component.facebook.config.FacebookConfiguration;
import org.apache.camel.component.facebook.config.FacebookEndpointConfiguration;
import org.apache.camel.util.IntrospectionSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Helper class to work with Facebook component properties.
*/
public final class FacebookPropertiesHelper {
// set of field names which are specific to Facebook4J api, to be excluded from method argument considerations
private static final Set<String> COMPONENT_CONFIG_FIELDS = new HashSet<String>();
private static final Logger LOG = LoggerFactory.getLogger(FacebookPropertiesHelper.class);
private static final Set<String> ENDPOINT_CONFIG_FIELDS = new HashSet<String>();
static {
for (Field field : FacebookConfiguration.class.getDeclaredFields()) {
COMPONENT_CONFIG_FIELDS.add(field.getName());
}
for (Field field : FacebookEndpointConfiguration.class.getDeclaredFields()) {
ENDPOINT_CONFIG_FIELDS.add(field.getName());
}
}
private FacebookPropertiesHelper() {
// utility
}
/**
* Apply properties for {@link Reading} type to the supplied {@link FacebookEndpointConfiguration}.
* @param configuration endpoint configuration to update
* @param options properties to apply to the reading field in configuration
*/
public static void configureReadingProperties(FacebookEndpointConfiguration configuration,
Map<String, Object> options) {
final Map<String, Object> readingProperties = IntrospectionSupport.extractProperties(
options, FacebookConstants.READING_PREFIX);
if (!readingProperties.isEmpty()) {
try {
// add to an existing reading reference?
// NOTE Reading class does not support overwriting properties!!!
Reading reading = configuration.getReading();
if (reading == null) {
reading = new Reading();
} else {
reading = ReadingBuilder.copy(reading, false);
}
// set properties
ReadingBuilder.setProperties(reading,
readingProperties);
// update reading in configuration
configuration.setReading(reading);
} catch (Exception e) {
throw new IllegalArgumentException(readingProperties.toString(), e);
}
// add any unknown properties back to options to throw an error later
for (Map.Entry<String, Object> entry : readingProperties.entrySet()) {
options.put(FacebookConstants.READING_PREFIX + entry.getKey(), entry.getValue());
}
}
}
/**
* Gets exchange header properties that start with {@link FacebookConstants}.FACEBOOK_PROPERTY_PREFIX.
*
* @param exchange Camel exchange
* @param properties map to collect properties with required prefix
*/
public static Map<String, Object> getExchangeProperties(Exchange exchange, Map<String, Object> properties) {
int nProperties = 0;
for (Map.Entry<String, Object> entry : exchange.getIn().getHeaders().entrySet()) {
if (entry.getKey().startsWith(FacebookConstants.FACEBOOK_PROPERTY_PREFIX)) {
properties.put(entry.getKey().substring(FacebookConstants.FACEBOOK_PROPERTY_PREFIX.length()),
entry.getValue());
nProperties++;
}
}
LOG.debug("Found {} properties in exchange", nProperties);
return properties;
}
public static void getEndpointProperties(FacebookEndpointConfiguration configuration,
Map<String, Object> properties) {
if (IntrospectionSupport.getProperties(configuration, properties, null, false)) {
final Set<String> names = properties.keySet();
// remove component config properties so we only have endpoint properties
names.removeAll(COMPONENT_CONFIG_FIELDS);
}
if (LOG.isDebugEnabled()) {
final Set<String> names = properties.keySet();
LOG.debug("Found endpoint properties {}", names.retainAll(ENDPOINT_CONFIG_FIELDS));
}
}
public static Set<String> getEndpointPropertyNames(FacebookEndpointConfiguration configuration) {
Map<String, Object> properties = new HashMap<String, Object>();
getEndpointProperties(configuration, properties);
return Collections.unmodifiableSet(properties.keySet());
}
public static Set<String> getValidEndpointProperties() {
return Collections.unmodifiableSet(ENDPOINT_CONFIG_FIELDS);
}
}