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/*
 * 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.jclouds.ec2.options.internal;

import static shaded.com.google.common.base.Preconditions.checkNotNull;

import java.util.Set;

import org.jclouds.http.options.BaseHttpRequestOptions;
import org.jclouds.util.Predicates2;

import shaded.com.google.common.collect.ImmutableSet;
import shaded.com.google.common.collect.ImmutableSet.Builder;
import shaded.com.google.common.collect.Iterables;

public class BaseEC2RequestOptions extends BaseHttpRequestOptions {

   @Override
   public String toString() {
      return "[formParameters=" + formParameters + "]";
   }

   protected void indexFormValuesWithPrefix(String prefix, String... values) {
      for (int i = 0; i < values.length; i++) {
         formParameters.put(prefix + "." + (i + 1), checkNotNull(values[i], prefix.toLowerCase() + "s[" + i + "]"));
      }
   }

   protected void indexFormValuesWithPrefix(String prefix, Iterable values) {
      indexFormValuesWithPrefix(prefix, Iterables.toArray(values, String.class));
   }

   protected Set getFormValuesWithKeysPrefixedBy(final String prefix) {
      Builder values = ImmutableSet.builder();
      for (String key : Iterables.filter(formParameters.keySet(), Predicates2.startsWith(prefix))) {
         values.add(Iterables.get(formParameters.get(key), 0));
      }
      return values.build();
   }

}