/providers/gogrid/src/main/java/org/jclouds/gogrid/compute/suppliers/GoGridImageSupplier.java

/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds 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.jclouds.gogrid.compute.suppliers;

import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.annotation.Resource;
import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import org.jclouds.compute.domain.Image;
import org.jclouds.compute.domain.ImageBuilder;
import org.jclouds.compute.domain.OperatingSystem;
import org.jclouds.compute.domain.OsFamily;
import org.jclouds.compute.reference.ComputeServiceConstants;
import org.jclouds.compute.strategy.PopulateDefaultLoginCredentialsForImageStrategy;
import org.jclouds.compute.util.ComputeServiceUtils;
import org.jclouds.gogrid.GoGridClient;
import org.jclouds.gogrid.domain.ServerImage;
import org.jclouds.logging.Logger;

import com.google.common.base.Supplier;
import com.google.common.collect.Sets;

/**
 * 
 * @author Adrian Cole
 */
@Singleton
public class GoGridImageSupplier implements Supplier<Set<? extends Image>> {
   public static final Pattern GOGRID_OS_PATTERN = Pattern.compile("([a-zA-Z]*).*");
   public static final Pattern GOGRID_VERSION_PATTERN = Pattern.compile(".* ([0-9.]+) .*");

   @Resource
   @Named(ComputeServiceConstants.COMPUTE_LOGGER)
   protected Logger logger = Logger.NULL;

   private final GoGridClient sync;
   private final PopulateDefaultLoginCredentialsForImageStrategy authenticator;
   private final Map<OsFamily, Map<String, String>> osVersionMap;

   @Inject
   GoGridImageSupplier(GoGridClient sync, PopulateDefaultLoginCredentialsForImageStrategy authenticator,
         Map<OsFamily, Map<String, String>> osVersionMap) {
      this.osVersionMap = osVersionMap;
      this.sync = sync;
      this.authenticator = authenticator;
   }

   @Override
   public Set<? extends Image> get() {
      final Set<Image> images = Sets.newHashSet();
      logger.debug(">> providing images");
      Set<ServerImage> allImages = sync.getImageServices().getImageList();
      for (ServerImage from : allImages) {
         ImageBuilder builder = new ImageBuilder();
         builder.ids(from.getId() + "");
         builder.name(from.getFriendlyName());
         builder.description(from.getDescription());
         builder.defaultCredentials(authenticator.execute(from));
         builder.operatingSystem(parseOs(from));
         images.add(builder.build());
      }
      logger.debug("<< images(%d)", images.size());
      return images;
   }

   protected OperatingSystem parseOs(ServerImage from) {
      OsFamily osFamily = null;
      String osName = from.getOs().getName();
      String osArch = from.getArchitecture().getDescription();
      String osVersion = null;
      String osDescription = from.getOs().getDescription();
      boolean is64Bit = (from.getOs().getName().indexOf("64") != -1 || from.getDescription().indexOf("64") != -1);

      if (osName.startsWith("Windows")) {
         osFamily = OsFamily.WINDOWS;
      } else {
         Matcher matcher = GOGRID_OS_PATTERN.matcher(from.getName());
         if (matcher.find()) {
            try {
               osFamily = OsFamily.fromValue(matcher.group(1).toLowerCase());
            } catch (IllegalArgumentException e) {
               logger.debug("<< didn't match os(%s)", from.getName());
            }
         }
      }
      Matcher matcher = GOGRID_VERSION_PATTERN.matcher(osName);
      if (matcher.find()) {
         osVersion = ComputeServiceUtils.parseVersionOrReturnEmptyString(osFamily, matcher.group(1), osVersionMap);
      }
      // TODO determine DC images are in
      return new OperatingSystem(osFamily, osName, osVersion, osArch, osDescription, is64Bit);
   }

}