| /* |
| * 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.commons.fileupload.util; |
| |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.commons.fileupload.FileItemHeaders; |
| |
| /** |
| * Default implementation of the {@link FileItemHeaders} interface. |
| * |
| * @author Michael C. Macaluso |
| * @since 1.3 |
| */ |
| public class FileItemHeadersImpl implements FileItemHeaders, Serializable { |
| private static final long serialVersionUID = -4455695752627032559L; |
| |
| /** |
| * Map of <code>String</code> keys to a <code>List</code> of |
| * <code>String</code> instances. |
| */ |
| private final Map headerNameToValueListMap = new HashMap(); |
| |
| /** |
| * List to preserve order of headers as added. This would not be |
| * needed if a <code>LinkedHashMap</code> could be used, but don't |
| * want to depend on 1.4. |
| */ |
| private final List headerNameList = new ArrayList(); |
| |
| public String getHeader(String name) { |
| String nameLower = name.toLowerCase(); |
| List headerValueList = (List) headerNameToValueListMap.get(nameLower); |
| if (null == headerValueList) { |
| return null; |
| } |
| return (String) headerValueList.get(0); |
| } |
| |
| public Iterator getHeaderNames() { |
| return headerNameList.iterator(); |
| } |
| |
| public Iterator getHeaders(String name) { |
| String nameLower = name.toLowerCase(); |
| List headerValueList = (List) headerNameToValueListMap.get(nameLower); |
| if (null == headerValueList) { |
| return Collections.EMPTY_LIST.iterator(); |
| } |
| return headerValueList.iterator(); |
| } |
| |
| /** |
| * Method to add header values to this instance. |
| * |
| * @param name name of this header |
| * @param value value of this header |
| */ |
| public synchronized void addHeader(String name, String value) { |
| String nameLower = name.toLowerCase(); |
| List headerValueList = (List) headerNameToValueListMap.get(nameLower); |
| if (null == headerValueList) { |
| headerValueList = new ArrayList(); |
| headerNameToValueListMap.put(nameLower, headerValueList); |
| headerNameList.add(nameLower); |
| } |
| headerValueList.add(value); |
| } |
| } |