/*
 * 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.tomcat.util.http.fileupload.util;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;

import org.apache.tomcat.util.http.fileupload.FileItemHeaders;

Default implementation of the FileItemHeaders interface.
Since:1.2.1
/** * Default implementation of the {@link FileItemHeaders} interface. * * @since 1.2.1 */
public class FileItemHeadersImpl implements FileItemHeaders, Serializable {
Serial version UID, being used, if serialized.
/** * Serial version UID, being used, if serialized. */
private static final long serialVersionUID = -4455695752627032559L;
Map of String keys to a List of String instances.
/** * Map of {@code String} keys to a {@code List} of * {@code String} instances. */
private final Map<String, List<String>> headerNameToValueListMap = new LinkedHashMap<>();
{@inheritDoc}
/** * {@inheritDoc} */
@Override public String getHeader(String name) { String nameLower = name.toLowerCase(Locale.ENGLISH); List<String> headerValueList = headerNameToValueListMap.get(nameLower); if (null == headerValueList) { return null; } return headerValueList.get(0); }
{@inheritDoc}
/** * {@inheritDoc} */
@Override public Iterator<String> getHeaderNames() { return headerNameToValueListMap.keySet().iterator(); }
{@inheritDoc}
/** * {@inheritDoc} */
@Override public Iterator<String> getHeaders(String name) { String nameLower = name.toLowerCase(Locale.ENGLISH); List<String> headerValueList = headerNameToValueListMap.get(nameLower); if (null == headerValueList) { headerValueList = Collections.emptyList(); } return headerValueList.iterator(); }
Method to add header values to this instance.
Params:
  • name – name of this header
  • value – value of this header
/** * 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(Locale.ENGLISH); List<String> headerValueList = headerNameToValueListMap.get(nameLower); if (null == headerValueList) { headerValueList = new ArrayList<>(); headerNameToValueListMap.put(nameLower, headerValueList); } headerValueList.add(value); } }