| /* |
| * 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.openstack.swift.v1.functions; |
| |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| import com.google.common.base.Function; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.Multimap; |
| |
| /** |
| * Extracts entries whose keys start with {@code .*-Meta-}. |
| * |
| * @param from |
| * a {@link Multimap} containing the prefixed headers. |
| * |
| * @return the extracted metadata without the prefixed keys. |
| */ |
| public enum EntriesWithoutMetaPrefix implements Function<Multimap<String, String>, Map<String, String>> { |
| INSTANCE; |
| |
| @Override |
| public Map<String, String> apply(Multimap<String, String> arg0) { |
| ImmutableMap.Builder<String, String> metadata = ImmutableMap.builder(); |
| for (Entry<String, String> header : arg0.entries()) { |
| int index = header.getKey().indexOf("-Meta-"); |
| if (index != -1) { |
| metadata.put(header.getKey().substring(index + 6), header.getValue()); |
| } |
| } |
| return metadata.build(); |
| } |
| } |