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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 @Override
52 public String getHeader(String name) {
53 String nameLower = name.toLowerCase(Locale.ENGLISH);
54 List<String> headerValueList = headerNameToValueListMap.get(nameLower);
55 if (null == headerValueList) {
56 return null;
57 }
58 return headerValueList.get(0);
59 }
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64 @Override
65 public Iterator<String> getHeaderNames() {
66 return headerNameToValueListMap.keySet().iterator();
67 }
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72 @Override
73 public Iterator<String> getHeaders(String name) {
74 String nameLower = name.toLowerCase(Locale.ENGLISH);
75 List<String> headerValueList = headerNameToValueListMap.get(nameLower);
76 if (null == headerValueList) {
77 headerValueList = Collections.emptyList();
78 }
79 return headerValueList.iterator();
80 }
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88 public synchronized void addHeader(String name, String value) {
89 String nameLower = name.toLowerCase(Locale.ENGLISH);
90 List<String> headerValueList = headerNameToValueListMap.get(nameLower);
91 if (null == headerValueList) {
92 headerValueList = new ArrayList<String>();
93 headerNameToValueListMap.put(nameLower, headerValueList);
94 }
95 headerValueList.add(value);
96 }
97
98 }