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17 package org.apache.commons.fileupload.util;
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19 import java.io.Serializable;
20 import java.util.ArrayList;
21 import java.util.Collections;
22 import java.util.HashMap;
23 import java.util.Iterator;
24 import java.util.List;
25 import java.util.Map;
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27 import org.apache.commons.fileupload.FileItemHeaders;
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35 public class FileItemHeadersImpl implements FileItemHeaders, Serializable {
36 private static final long serialVersionUID = -4455695752627032559L;
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42 private final Map headerNameToValueListMap = new HashMap();
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49 private final List headerNameList = new ArrayList();
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51 public String getHeader(String name) {
52 String nameLower = name.toLowerCase();
53 List headerValueList = (List) headerNameToValueListMap.get(nameLower);
54 if (null == headerValueList) {
55 return null;
56 }
57 return (String) headerValueList.get(0);
58 }
59
60 public Iterator getHeaderNames() {
61 return headerNameList.iterator();
62 }
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64 public Iterator getHeaders(String name) {
65 String nameLower = name.toLowerCase();
66 List headerValueList = (List) headerNameToValueListMap.get(nameLower);
67 if (null == headerValueList) {
68 return Collections.EMPTY_LIST.iterator();
69 }
70 return headerValueList.iterator();
71 }
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79 public synchronized void addHeader(String name, String value) {
80 String nameLower = name.toLowerCase();
81 List headerValueList = (List) headerNameToValueListMap.get(nameLower);
82 if (null == headerValueList) {
83 headerValueList = new ArrayList();
84 headerNameToValueListMap.put(nameLower, headerValueList);
85 headerNameList.add(nameLower);
86 }
87 headerValueList.add(value);
88 }
89 }