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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.Iterator;
23 import java.util.LinkedHashMap;
24 import java.util.List;
25 import java.util.Locale;
26 import java.util.Map;
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28 import org.apache.commons.fileupload.FileItemHeaders;
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35 public class FileItemHeadersImpl implements FileItemHeaders, Serializable {
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40 private static final long serialVersionUID = -4455695752627032559L;
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46 private final Map<String, List<String>> headerNameToValueListMap = new LinkedHashMap<String, List<String>>();
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51 public String getHeader(String name) {
52 String nameLower = name.toLowerCase(Locale.ENGLISH);
53 List<String> headerValueList = headerNameToValueListMap.get(nameLower);
54 if (null == headerValueList) {
55 return null;
56 }
57 return headerValueList.get(0);
58 }
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63 public Iterator<String> getHeaderNames() {
64 return headerNameToValueListMap.keySet().iterator();
65 }
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70 public Iterator<String> getHeaders(String name) {
71 String nameLower = name.toLowerCase(Locale.ENGLISH);
72 List<String> headerValueList = headerNameToValueListMap.get(nameLower);
73 if (null == headerValueList) {
74 headerValueList = Collections.emptyList();
75 }
76 return headerValueList.iterator();
77 }
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85 public synchronized void addHeader(String name, String value) {
86 String nameLower = name.toLowerCase(Locale.ENGLISH);
87 List<String> headerValueList = headerNameToValueListMap.get(nameLower);
88 if (null == headerValueList) {
89 headerValueList = new ArrayList<String>();
90 headerNameToValueListMap.put(nameLower, headerValueList);
91 }
92 headerValueList.add(value);
93 }
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95 }