net.hasor.web.upload.util.HeadersSet Maven / Gradle / Ivy
/*
* 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 net.hasor.web.upload.util;
import net.hasor.web.FileItemHeaders;
import java.util.*;
/**
* Default implementation of the {@link FileItemHeaders} interface.
* @since 1.2.1
* @version $Id: HeadersSet.java 1458379 2013-03-19 16:16:47Z britter $
*/
public class HeadersSet implements FileItemHeaders {
/**
* Map of String keys to a List of
* String instances.
*/
private final Map> headerNameToValueListMap = new LinkedHashMap>();
/**
* {@inheritDoc}
*/
public String getHeader(String name) {
String nameLower = name.toLowerCase(Locale.ENGLISH);
List headerValueList = headerNameToValueListMap.get(nameLower);
if (null == headerValueList) {
return null;
}
return headerValueList.get(0);
}
/**
* {@inheritDoc}
*/
public Iterator getHeaderNames() {
return headerNameToValueListMap.keySet().iterator();
}
/**
* {@inheritDoc}
*/
public Iterator getHeaders(String name) {
String nameLower = name.toLowerCase(Locale.ENGLISH);
List headerValueList = headerNameToValueListMap.get(nameLower);
if (null == headerValueList) {
headerValueList = Collections.emptyList();
}
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(Locale.ENGLISH);
headerNameToValueListMap.computeIfAbsent(nameLower, k -> new ArrayList<>()).add(value);
}
}