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Polish GSON customization support 

Closes gh-11498
This commit is contained in:
Phillip Webb 2018-01-08 22:39:45 -08:00
parent ba552f1d24
commit 286a3bb10a
5 changed files with 109 additions and 170 deletions
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159
spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/gson/GsonAutoConfiguration.java
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@ -1,5 +1,5 @@
/*
* Copyright 2012-2014 the original author or authors.
* Copyright 2012-2018 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -18,18 +18,16 @@ package org.springframework.boot.autoconfigure.gson;
import java.util.List;
import com.google.gson.FieldNamingPolicy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.LongSerializationPolicy;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.boot.context.properties.PropertyMapper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.Ordered;
/**
@ -41,120 +39,65 @@ import org.springframework.core.Ordered;
*/
@Configuration
@ConditionalOnClass(Gson.class)
@EnableConfigurationProperties(GsonProperties.class)
public class GsonAutoConfiguration {
@Configuration
static class GsonConfiguration {
@Bean
@Primary
@ConditionalOnMissingBean(Gson.class)
public Gson gson(GsonBuilder gsonBuilder) {
return gsonBuilder.create();
}
@Bean
public GsonBuilder gsonBuilder(List<GsonBuilderCustomizer> customizers) {
GsonBuilder builder = new GsonBuilder();
customizers.forEach(c -> c.customize(builder));
return builder;
}
@Configuration
static class GsonBuilderConfiguration {
@Bean
public GsonBuilder gsonBuilder(List<GsonBuilderCustomizer> customizers) {
final GsonBuilder gsonBuilder = new GsonBuilder();
customizers.forEach(c -> c.customize(gsonBuilder));
return gsonBuilder;
}
@Bean
@ConditionalOnMissingBean(Gson.class)
public Gson gson(GsonBuilder gsonBuilder) {
return gsonBuilder.create();
}
@Configuration
@EnableConfigurationProperties(GsonProperties.class)
static class GsonBuilderCustomizerConfiguration {
@Bean
public StandardGsonBuilderCustomizer standardGsonBuilderCustomizer(
GsonProperties gsonProperties) {
return new StandardGsonBuilderCustomizer(gsonProperties);
}
@Bean
public StandardGsonBuilderCustomizer standardGsonBuilderCustomizer(
GsonProperties gsonProperties) {
return new StandardGsonBuilderCustomizer(gsonProperties);
private static final class StandardGsonBuilderCustomizer
implements GsonBuilderCustomizer, Ordered {
private final GsonProperties properties;
StandardGsonBuilderCustomizer(GsonProperties properties) {
this.properties = properties;
}
private static final class StandardGsonBuilderCustomizer
implements GsonBuilderCustomizer, Ordered {
private final GsonProperties properties;
StandardGsonBuilderCustomizer(GsonProperties properties) {
this.properties = properties;
}
@Override
public int getOrder() {
return 0;
}
@Override
public void customize(GsonBuilder gsonBuilder) {
boolean generateNonExecutableJson = this.properties
.isGenerateNonExecutableJson();
if (generateNonExecutableJson) {
gsonBuilder.generateNonExecutableJson();
}
boolean excludeFieldsWithoutExposeAnnotation = this.properties
.isExcludeFieldsWithoutExposeAnnotation();
if (excludeFieldsWithoutExposeAnnotation) {
gsonBuilder.excludeFieldsWithoutExposeAnnotation();
}
boolean serializeNulls = this.properties.isSerializeNulls();
if (serializeNulls) {
gsonBuilder.serializeNulls();
}
boolean enableComplexMapKeySerialization = this.properties
.isEnableComplexMapKeySerialization();
if (enableComplexMapKeySerialization) {
gsonBuilder.enableComplexMapKeySerialization();
}
boolean disableInnerClassSerialization = this.properties
.isDisableInnerClassSerialization();
if (disableInnerClassSerialization) {
gsonBuilder.disableInnerClassSerialization();
}
LongSerializationPolicy longSerializationPolicy = this.properties
.getLongSerializationPolicy();
if (longSerializationPolicy != null) {
gsonBuilder.setLongSerializationPolicy(longSerializationPolicy);
}
FieldNamingPolicy fieldNamingPolicy = this.properties
.getFieldNamingPolicy();
if (fieldNamingPolicy != null) {
gsonBuilder.setFieldNamingPolicy(fieldNamingPolicy);
}
boolean prettyPrinting = this.properties.isPrettyPrinting();
if (prettyPrinting) {
gsonBuilder.setPrettyPrinting();
}
boolean isLenient = this.properties.isLenient();
if (isLenient) {
gsonBuilder.setLenient();
}
boolean disableHtmlEscaping = this.properties.isDisableHtmlEscaping();
if (disableHtmlEscaping) {
gsonBuilder.disableHtmlEscaping();
}
String dateFormat = this.properties.getDateFormat();
if (dateFormat != null) {
gsonBuilder.setDateFormat(dateFormat);
}
}
@Override
public int getOrder() {
return 0;
}
@Override
public void customize(GsonBuilder builder) {
GsonProperties properties = this.properties;
PropertyMapper map = PropertyMapper.get().alwaysApplyingWhenNonNull();
map.from(properties::getGenerateNonExecutableJson)
.toCall(builder::generateNonExecutableJson);
map.from(properties::getExcludeFieldsWithoutExposeAnnotation)
.toCall(builder::excludeFieldsWithoutExposeAnnotation);
map.from(properties::getSerializeNulls).toCall(builder::serializeNulls);
map.from(properties::getEnableComplexMapKeySerialization)
.toCall(builder::enableComplexMapKeySerialization);
map.from(properties::getDisableInnerClassSerialization)
.toCall(builder::disableInnerClassSerialization);
map.from(properties::getLongSerializationPolicy)
.to(builder::setLongSerializationPolicy);
map.from(properties::getFieldNamingPolicy).to(builder::setFieldNamingPolicy);
map.from(properties::getPrettyPrinting).toCall(builder::setPrettyPrinting);
map.from(properties::getLenient).toCall(builder::setLenient);
map.from(properties::getDisableHtmlEscaping)
.toCall(builder::disableHtmlEscaping);
map.from(properties::getDateFormat).to(builder::setDateFormat);
}
}
}

2
spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/gson/GsonBuilderCustomizer.java
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@ -1,5 +1,5 @@
/*
* Copyright 2012-2017 the original author or authors.
* Copyright 2012-2018 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.

86
spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/gson/GsonProperties.java
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@ -1,5 +1,5 @@
/*
* Copyright 2012-2017 the original author or authors.
* Copyright 2012-2018 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -19,7 +19,6 @@ package org.springframework.boot.autoconfigure.gson;
import com.google.gson.FieldNamingPolicy;
import com.google.gson.Gson;
import com.google.gson.LongSerializationPolicy;
import com.google.gson.annotations.Expose;
import org.springframework.boot.context.properties.ConfigurationProperties;
@ -33,109 +32,103 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
public class GsonProperties {
/**
* Makes the output JSON non-executable in Javascript by prefixing the generated JSON
* with some special text.
* Whether to generate non executable JSON by prefixing the output with some special
* text.
*/
private boolean generateNonExecutableJson;
private Boolean generateNonExecutableJson;
/**
* Configures {@link Gson} to exclude all fields from consideration for serialization
* or deserialization that do not have the {@link Expose} annotation.
* Whether to exclude all fields from consideration for serialization or
* deserialization that do not have the "Expose" annotation.
*/
private boolean excludeFieldsWithoutExposeAnnotation;
private Boolean excludeFieldsWithoutExposeAnnotation;
/**
* Configure {@link Gson} to serialize null fields.
* Whether to to serialize null fields.
*/
private boolean serializeNulls;
private Boolean serializeNulls;
/**
* Enabling this feature will only change the serialized form if the map key is a
* complex type (i.e. non-primitive) in its serialized JSON form
* Whether to enabled serialization of complex map keys (i.e. non-primitives).
*/
private boolean enableComplexMapKeySerialization;
private Boolean enableComplexMapKeySerialization;
/**
* Configures {@link Gson} to exclude inner classes during serialization.
* Whether to exclude inner classes during serialization.
*/
private boolean disableInnerClassSerialization;
private Boolean disableInnerClassSerialization;
/**
* Configures {@link Gson} to apply a specific serialization policy for Long and long
* objects.
* Serialization policy for Long and long types.
*/
private LongSerializationPolicy longSerializationPolicy;
/**
* Configures {@link Gson} to apply a specific naming policy to an object's field
* during serialization and deserialization.
* The naming policy that should be applied to an object's field during serialization
* and deserialization.
*/
private FieldNamingPolicy fieldNamingPolicy;
/**
* Configures {@link Gson} to output Json that fits in a page for pretty printing.
* This option only affects Json serialization.
* Whether to output serialized JSON that fits in a page for pretty printing.
*/
private boolean prettyPrinting;
private Boolean prettyPrinting;
/**
* By default, {@link Gson} is strict and only accepts JSON as specified by RFC 4627.
* This option makes the parser liberal in what it accepts.
* Whether to be lenient about parsing JSON that doesn't conform to RFC 4627.
*/
private boolean lenient;
private Boolean lenient;
/**
* By default, {@link Gson} escapes HTML characters such as < > etc. Use this option
* to configure Gson to pass-through HTML characters as is.
* Whether to disable the escaping of HTML characters such as '<' '>' etc.
*/
private boolean disableHtmlEscaping;
private Boolean disableHtmlEscaping;
/**
* Configures {@link Gson} to serialize Date objects according to the pattern
* provided.
* The format to use when serializing Date objects.
*/
private String dateFormat;
public boolean isGenerateNonExecutableJson() {
public Boolean getGenerateNonExecutableJson() {
return this.generateNonExecutableJson;
}
public void setGenerateNonExecutableJson(boolean generateNonExecutableJson) {
public void setGenerateNonExecutableJson(Boolean generateNonExecutableJson) {
this.generateNonExecutableJson = generateNonExecutableJson;
}
public boolean isExcludeFieldsWithoutExposeAnnotation() {
public Boolean getExcludeFieldsWithoutExposeAnnotation() {
return this.excludeFieldsWithoutExposeAnnotation;
}
public void setExcludeFieldsWithoutExposeAnnotation(
boolean excludeFieldsWithoutExposeAnnotation) {
Boolean excludeFieldsWithoutExposeAnnotation) {
this.excludeFieldsWithoutExposeAnnotation = excludeFieldsWithoutExposeAnnotation;
}
public boolean isSerializeNulls() {
public Boolean getSerializeNulls() {
return this.serializeNulls;
}
public void setSerializeNulls(boolean serializeNulls) {
public void setSerializeNulls(Boolean serializeNulls) {
this.serializeNulls = serializeNulls;
}
public boolean isEnableComplexMapKeySerialization() {
public Boolean getEnableComplexMapKeySerialization() {
return this.enableComplexMapKeySerialization;
}
public void setEnableComplexMapKeySerialization(
boolean enableComplexMapKeySerialization) {
Boolean enableComplexMapKeySerialization) {
this.enableComplexMapKeySerialization = enableComplexMapKeySerialization;
}
public boolean isDisableInnerClassSerialization() {
public Boolean getDisableInnerClassSerialization() {
return this.disableInnerClassSerialization;
}
public void setDisableInnerClassSerialization(
boolean disableInnerClassSerialization) {
Boolean disableInnerClassSerialization) {
this.disableInnerClassSerialization = disableInnerClassSerialization;
}
@ -156,27 +149,27 @@ public class GsonProperties {
this.fieldNamingPolicy = fieldNamingPolicy;
}
public boolean isPrettyPrinting() {
public Boolean getPrettyPrinting() {
return this.prettyPrinting;
}
public void setPrettyPrinting(boolean prettyPrinting) {
public void setPrettyPrinting(Boolean prettyPrinting) {
this.prettyPrinting = prettyPrinting;
}
public boolean isLenient() {
public Boolean getLenient() {
return this.lenient;
}
public void setLenient(boolean lenient) {
public void setLenient(Boolean lenient) {
this.lenient = lenient;
}
public boolean isDisableHtmlEscaping() {
public Boolean getDisableHtmlEscaping() {
return this.disableHtmlEscaping;
}
public void setDisableHtmlEscaping(boolean disableHtmlEscaping) {
public void setDisableHtmlEscaping(Boolean disableHtmlEscaping) {
this.disableHtmlEscaping = disableHtmlEscaping;
}
@ -187,4 +180,5 @@ public class GsonProperties {
public void setDateFormat(String dateFormat) {
this.dateFormat = dateFormat;
}
}

8
spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/gson/GsonAutoConfigurationTests.java
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@ -1,5 +1,5 @@
/*
* Copyright 2012-2016 the original author or authors.
* Copyright 2012-2018 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -34,6 +34,7 @@ import org.springframework.boot.test.context.runner.ApplicationContextRunner;
import org.springframework.context.annotation.Bean;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Tests for {@link GsonAutoConfiguration}.
*
@ -246,7 +247,6 @@ public class GsonAutoConfigurationTests {
public class DataObject {
@SuppressWarnings("unused")
public static final String STATIC_DATA = "bye";
@SuppressWarnings("unused")
@ -255,14 +255,16 @@ public class GsonAutoConfigurationTests {
public void setData(Long data) {
this.data = data;
}
}
public class WrapperObject {
@SuppressWarnings("unused")
class NestedObject {
@SuppressWarnings("unused")
private String data = "nested";
}
}

24
spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc
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@ -340,18 +340,18 @@ content into your application. Rather, pick only the properties that you need.
spring.jackson.serialization.*= # Jackson on/off features that affect the way Java objects are serialized.
spring.jackson.time-zone= # Time zone used when formatting dates. For instance, "America/Los_Angeles" or "GMT+10".
# GSON ({sc-spring-boot-autoconfigure}/gson/GsonProperties.{sc-ext}[GsonProperties])
spring.gson.date-format= # Configures Gson to serialize Date objects according to the pattern provided.
spring.gson.disable-html-escaping=false # By default, Gson escapes HTML characters such as < > etc. Use this option to configure Gson to pass-through HTML characters as is.
spring.gson.disable-inner-class-serialization=false # Configures Gson to exclude inner classes during serialization.
spring.gson.enable-complex-map-key-serialization=false # Enabling this feature will only change the serialized form if the map key is a complex type (i.e. non-primitive) in its serialized JSON form
spring.gson.exclude-fields-without-expose-annotation=false # Configures Gson to exclude all fields from consideration for serialization or deserialization that do not have the Expose annotation.
spring.gson.field-naming-policy= # Configures Gson to apply a specific naming policy to an object's field during serialization and deserialization.
spring.gson.generate-non-executable-json=false # Makes the output JSON non-executable in Javascript by prefixing the generated JSON with some special text.
spring.gson.lenient=false # By default, Gson is strict and only accepts JSON as specified by RFC 4627. This option makes the parser liberal in what it accepts.
spring.gson.long-serialization-policy= # Configures Gson to apply a specific serialization policy for Long and long objects.
spring.gson.pretty-printing=false # Configures Gson to output Json that fits in a page for pretty printing. This option only affects Json serialization.
spring.gson.serialize-nulls=false # Configure Gson to serialize null fields.
# GSON ({sc-spring-boot-autoconfigure}/gson/GsonProperties.{sc-ext}[GsonProperties])
spring.gson.date-format= # The format to use when serializing Date objects.
spring.gson.disable-html-escaping= # Whether to disable the escaping of HTML characters such as '<' '>' etc.
spring.gson.disable-inner-class-serialization= # Whether to exclude inner classes during serialization.
spring.gson.enable-complex-map-key-serialization= # Whether to enabled serialization of complex map keys (i.e. non-primitives).
spring.gson.exclude-fields-without-expose-annotation= # Whether to exclude all fields from consideration for serialization or deserialization that do not have the "Expose" annotation.
spring.gson.field-naming-policy= # The naming policy that should be applied to an object's field during serialization and deserialization.
spring.gson.generate-non-executable-json= # Whether to generate non executable JSON by prefixing the output with some special text.
spring.gson.lenient= # Whether to be lenient about parsing JSON that doesn't conform to RFC 4627.
spring.gson.long-serialization-policy= # Serialization policy for Long and long types.
spring.gson.pretty-printing= # Whether to output serialized JSON that fits in a page for pretty printing.
spring.gson.serialize-nulls= # Whether to to serialize null fields.
# JERSEY ({sc-spring-boot-autoconfigure}/jersey/JerseyProperties.{sc-ext}[JerseyProperties])
spring.jersey.application-path= # Path that serves as the base URI for the application. If specified, overrides the value of "@ApplicationPath".