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25 package org.slf4j.impl;
26
27 import java.util.HashMap;
28 import java.util.Iterator;
29 import java.util.Map;
30
31 import org.apache.log4j.MDCFriend;
32 import org.slf4j.spi.MDCAdapter;
33
34 public class Log4jMDCAdapter implements MDCAdapter {
35
36 static {
37 if (VersionUtil.getJavaMajorVersion() >= 9) {
38 MDCFriend.fixForJava9();
39 }
40 }
41
42 public void clear() {
43 @SuppressWarnings("rawtypes")
44 Map map = org.apache.log4j.MDC.getContext();
45 if (map != null) {
46 map.clear();
47 }
48 }
49
50 public String get(String key) {
51 return (String) org.apache.log4j.MDC.get(key);
52 }
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66 public void put(String key, String val) {
67 org.apache.log4j.MDC.put(key, val);
68 }
69
70 public void remove(String key) {
71 org.apache.log4j.MDC.remove(key);
72 }
73
74 @SuppressWarnings({ "rawtypes", "unchecked" })
75 public Map getCopyOfContextMap() {
76 Map old = org.apache.log4j.MDC.getContext();
77 if (old != null) {
78 return new HashMap(old);
79 } else {
80 return null;
81 }
82 }
83
84 @SuppressWarnings({ "rawtypes", "unchecked" })
85 public void setContextMap(Map contextMap) {
86 Map old = org.apache.log4j.MDC.getContext();
87 if (old == null) {
88 Iterator entrySetIterator = contextMap.entrySet().iterator();
89 while (entrySetIterator.hasNext()) {
90 Map.Entry mapEntry = (Map.Entry) entrySetIterator.next();
91 org.apache.log4j.MDC.put((String) mapEntry.getKey(), mapEntry.getValue());
92 }
93 } else {
94 old.clear();
95 old.putAll(contextMap);
96 }
97 }
98 }