providers/cloudsigma-zrh/src/main/java/org/jclouds/cloudsigma/functions/SplitNewlines.java

/**
 *
 * Copyright (C) 2010 Cloud Conscious, LLC. <info@cloudconscious.com>
 *
 * ====================================================================
 * 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 org.jclouds.cloudsigma.functions;

import static com.google.common.base.Predicates.equalTo;
import static com.google.common.base.Predicates.not;
import static com.google.common.collect.Iterables.filter;
import static com.google.common.collect.Sets.newTreeSet;

import java.util.Set;

import javax.inject.Inject;
import javax.inject.Singleton;

import org.jclouds.http.HttpResponse;
import org.jclouds.http.functions.ReturnStringIf2xx;

import com.google.common.base.Function;
import com.google.common.base.Splitter;

/**
 * 
 * @author Adrian Cole
 */
@Singleton
public class SplitNewlines implements Function<HttpResponse, Set<String>> {
   private final ReturnStringIf2xx returnStringIf200;

   @Inject
   protected SplitNewlines(ReturnStringIf2xx returnStringIf200) {
      this.returnStringIf200 = returnStringIf200;
   }

   @Override
   public Set<String> apply(HttpResponse response) {
      return newTreeSet(filter(Splitter.on('\n').split(returnStringIf200.apply(response)), not(equalTo(""))));
   }
}