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17 package org.apache.logging.log4j.core.jackson;
18
19 import java.io.IOException;
20 import java.util.Map;
21
22 import org.apache.logging.log4j.util.ReadOnlyStringMap;
23 import org.apache.logging.log4j.util.TriConsumer;
24
25 import com.fasterxml.jackson.core.JsonGenerationException;
26 import com.fasterxml.jackson.core.JsonGenerator;
27 import com.fasterxml.jackson.databind.SerializerProvider;
28 import com.fasterxml.jackson.databind.ser.std.StdSerializer;
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35 public class ContextDataSerializer extends StdSerializer<ReadOnlyStringMap> {
36
37 private static final long serialVersionUID = 1L;
38
39 protected ContextDataSerializer() {
40 super(Map.class, false);
41 }
42
43 @Override
44 public void serialize(final ReadOnlyStringMap contextData, final JsonGenerator jgen,
45 final SerializerProvider provider) throws IOException, JsonGenerationException {
46
47 jgen.writeStartObject();
48 contextData.forEach(WRITE_STRING_FIELD_INTO, jgen);
49 jgen.writeEndObject();
50 }
51
52 private static final TriConsumer<String, Object, JsonGenerator> WRITE_STRING_FIELD_INTO =
53 new TriConsumer<String, Object, JsonGenerator>() {
54
55 @Override
56 public void accept(final String key, final Object value, final JsonGenerator jsonGenerator) {
57 try {
58 jsonGenerator.writeStringField(key, String.valueOf(value));
59 } catch (final Exception ex) {
60 throw new IllegalStateException("Problem with key " + key, ex);
61 }
62 }
63 };
64 }