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JacksonAdapter.java
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JacksonAdapter.java
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/**
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for
* license information.
*/
package com.microsoft.rest.serializer;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.type.TypeBindings;
import com.fasterxml.jackson.datatype.joda.JodaModule;
import com.google.common.base.CharMatcher;
import com.google.common.base.Joiner;
import com.microsoft.rest.CollectionFormat;
import com.microsoft.rest.protocol.SerializerAdapter;
import java.io.IOException;
import java.io.StringWriter;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
/**
* A serialization helper class wrapped around {@link JacksonConverterFactory} and {@link ObjectMapper}.
*/
public class JacksonAdapter implements SerializerAdapter<ObjectMapper> {
/**
* An instance of {@link ObjectMapper} to serialize/deserialize objects.
*/
private final ObjectMapper mapper;
/**
* An instance of {@link ObjectMapper} that does not do flattening.
*/
private final ObjectMapper simpleMapper;
/**
* An instance of {@link JacksonConverterFactory} for Retrofit to use.
*/
private JacksonConverterFactory converterFactory;
/**
* Creates a new JacksonAdapter instance with default mapper settings.
*/
public JacksonAdapter() {
simpleMapper = initializeObjectMapper(new ObjectMapper());
ObjectMapper flatteningMapper = initializeObjectMapper(new ObjectMapper())
.registerModule(FlatteningSerializer.getModule(simpleMapper()))
.registerModule(FlatteningDeserializer.getModule(simpleMapper()));
mapper = initializeObjectMapper(new ObjectMapper())
// Order matters: must register in reverse order of hierarchy
.registerModule(AdditionalPropertiesSerializer.getModule(flatteningMapper))
.registerModule(AdditionalPropertiesDeserializer.getModule(flatteningMapper))
.registerModule(FlatteningSerializer.getModule(simpleMapper()))
.registerModule(FlatteningDeserializer.getModule(simpleMapper()));
}
/**
* Gets a static instance of {@link ObjectMapper} that doesn't handle flattening.
*
* @return an instance of {@link ObjectMapper}.
*/
protected ObjectMapper simpleMapper() {
return simpleMapper;
}
@Override
public ObjectMapper serializer() {
return mapper;
}
@Override
public JacksonConverterFactory converterFactory() {
return JacksonConverterFactory.create(serializer());
}
@Override
public String serialize(Object object) throws IOException {
if (object == null) {
return null;
}
StringWriter writer = new StringWriter();
serializer().writeValue(writer, object);
return writer.toString();
}
@Override
public String serializeRaw(Object object) {
if (object == null) {
return null;
}
try {
return CharMatcher.is('"').trimFrom(serialize(object));
} catch (IOException ex) {
return null;
}
}
@Override
public String serializeList(List<?> list, CollectionFormat format) {
if (list == null) {
return null;
}
List<String> serialized = new ArrayList<>();
for (Object element : list) {
String raw = serializeRaw(element);
serialized.add(raw != null ? raw : "");
}
return Joiner.on(format.getDelimiter()).join(serialized);
}
private JavaType constructJavaType(final Type type) {
if (type instanceof ParameterizedType) {
JavaType[] javaTypeArgs = new JavaType[((ParameterizedType) type).getActualTypeArguments().length];
for (int i = 0; i != ((ParameterizedType) type).getActualTypeArguments().length; ++i) {
javaTypeArgs[i] = constructJavaType(((ParameterizedType) type).getActualTypeArguments()[i]);
}
return mapper.getTypeFactory().constructType(type,
TypeBindings.create((Class<?>) ((ParameterizedType) type).getRawType(), javaTypeArgs));
} else {
return mapper.getTypeFactory().constructType(type);
}
}
@Override
@SuppressWarnings("unchecked")
public <T> T deserialize(String value, final Type type) throws IOException {
if (value == null || value.isEmpty()) {
return null;
}
return (T) serializer().readValue(value, constructJavaType(type));
}
/**
* Initializes an instance of JacksonMapperAdapter with default configurations
* applied to the object mapper.
*
* @param mapper the object mapper to use.
*/
private static ObjectMapper initializeObjectMapper(ObjectMapper mapper) {
mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false)
.configure(SerializationFeature.WRITE_EMPTY_JSON_ARRAYS, true)
.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false)
.configure(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT, true)
.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
.configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true)
.setSerializationInclusion(JsonInclude.Include.NON_NULL)
.registerModule(new JodaModule())
.registerModule(ByteArraySerializer.getModule())
.registerModule(Base64UrlSerializer.getModule())
.registerModule(DateTimeSerializer.getModule())
.registerModule(DateTimeRfc1123Serializer.getModule())
.registerModule(HeadersSerializer.getModule());
mapper.setVisibility(mapper.getSerializationConfig().getDefaultVisibilityChecker()
.withFieldVisibility(JsonAutoDetect.Visibility.ANY)
.withSetterVisibility(JsonAutoDetect.Visibility.NONE)
.withGetterVisibility(JsonAutoDetect.Visibility.NONE)
.withIsGetterVisibility(JsonAutoDetect.Visibility.NONE));
return mapper;
}
}