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Olof Larsson
2011-07-18 22:06:02 +02:00
parent 60603892c6
commit 8aefae5679
151 changed files with 988 additions and 949 deletions
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src/com/massivecraft/factions/gson/GsonBuilder.java Normal file
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/*
* Copyright (C) 2008 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.massivecraft.factions.gson;
import com.massivecraft.factions.gson.DefaultTypeAdapters.DefaultDateTypeAdapter;
import com.massivecraft.factions.gson.internal.$Gson$Preconditions;
import java.lang.reflect.Type;
import java.sql.Timestamp;
import java.text.DateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* <p>Use this builder to construct a {@link Gson} instance when you need to set configuration
* options other than the default. For {@link Gson} with default configuration, it is simpler to
* use {@code new Gson()}. {@code GsonBuilder} is best used by creating it, and then invoking its
* various configuration methods, and finally calling create.</p>
*
* <p>The following is an example shows how to use the {@code GsonBuilder} to construct a Gson
* instance:
*
* <pre>
* Gson gson = new GsonBuilder()
* .registerTypeAdapter(Id.class, new IdTypeAdapter())
* .enableComplexMapKeySerialization()
* .serializeNulls()
* .setDateFormat(DateFormat.LONG)
* .setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE)
* .setPrettyPrinting()
* .setVersion(1.0)
* .create();
* </pre></p>
*
* <p>NOTES:
* <ul>
* <li> the order of invocation of configuration methods does not matter.</li>
* <li> The default serialization of {@link Date} and its subclasses in Gson does
* not contain time-zone information. So, if you are using date/time instances,
* use {@code GsonBuilder} and its {@code setDateFormat} methods.</li>
* </ul>
* </p>
*
* @author Inderjeet Singh
* @author Joel Leitch
*/
public final class GsonBuilder {
private static final MapAsArrayTypeAdapter COMPLEX_KEY_MAP_TYPE_ADAPTER =
new MapAsArrayTypeAdapter();
private static final InnerClassExclusionStrategy innerClassExclusionStrategy =
new InnerClassExclusionStrategy();
private static final ExposeAnnotationDeserializationExclusionStrategy
exposeAnnotationDeserializationExclusionStrategy =
new ExposeAnnotationDeserializationExclusionStrategy();
private static final ExposeAnnotationSerializationExclusionStrategy
exposeAnnotationSerializationExclusionStrategy =
new ExposeAnnotationSerializationExclusionStrategy();
private final Set<ExclusionStrategy> serializeExclusionStrategies =
new HashSet<ExclusionStrategy>();
private final Set<ExclusionStrategy> deserializeExclusionStrategies =
new HashSet<ExclusionStrategy>();
private double ignoreVersionsAfter;
private ModifierBasedExclusionStrategy modifierBasedExclusionStrategy;
private boolean serializeInnerClasses;
private boolean excludeFieldsWithoutExposeAnnotation;
private LongSerializationPolicy longSerializationPolicy;
private FieldNamingStrategy2 fieldNamingPolicy;
private final ParameterizedTypeHandlerMap<InstanceCreator<?>> instanceCreators;
private final ParameterizedTypeHandlerMap<JsonSerializer<?>> serializers;
private final ParameterizedTypeHandlerMap<JsonDeserializer<?>> deserializers;
private boolean serializeNulls;
private String datePattern;
private int dateStyle;
private int timeStyle;
private boolean serializeSpecialFloatingPointValues;
private boolean escapeHtmlChars;
private boolean prettyPrinting;
private boolean generateNonExecutableJson;
/**
* Creates a GsonBuilder instance that can be used to build Gson with various configuration
* settings. GsonBuilder follows the builder pattern, and it is typically used by first
* invoking various configuration methods to set desired options, and finally calling
* {@link #create()}.
*/
public GsonBuilder() {
// add default exclusion strategies
deserializeExclusionStrategies.add(Gson.DEFAULT_ANON_LOCAL_CLASS_EXCLUSION_STRATEGY);
deserializeExclusionStrategies.add(Gson.DEFAULT_SYNTHETIC_FIELD_EXCLUSION_STRATEGY);
serializeExclusionStrategies.add(Gson.DEFAULT_ANON_LOCAL_CLASS_EXCLUSION_STRATEGY);
serializeExclusionStrategies.add(Gson.DEFAULT_SYNTHETIC_FIELD_EXCLUSION_STRATEGY);
// setup default values
ignoreVersionsAfter = VersionConstants.IGNORE_VERSIONS;
serializeInnerClasses = true;
prettyPrinting = false;
escapeHtmlChars = true;
modifierBasedExclusionStrategy = Gson.DEFAULT_MODIFIER_BASED_EXCLUSION_STRATEGY;
excludeFieldsWithoutExposeAnnotation = false;
longSerializationPolicy = LongSerializationPolicy.DEFAULT;
fieldNamingPolicy = Gson.DEFAULT_NAMING_POLICY;
instanceCreators = new ParameterizedTypeHandlerMap<InstanceCreator<?>>();
serializers = new ParameterizedTypeHandlerMap<JsonSerializer<?>>();
deserializers = new ParameterizedTypeHandlerMap<JsonDeserializer<?>>();
serializeNulls = false;
dateStyle = DateFormat.DEFAULT;
timeStyle = DateFormat.DEFAULT;
serializeSpecialFloatingPointValues = false;
generateNonExecutableJson = false;
}
/**
* Configures Gson to enable versioning support.
*
* @param ignoreVersionsAfter any field or type marked with a version higher than this value
* are ignored during serialization or deserialization.
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
*/
public GsonBuilder setVersion(double ignoreVersionsAfter) {
this.ignoreVersionsAfter = ignoreVersionsAfter;
return this;
}
/**
* Configures Gson to excludes all class fields that have the specified modifiers. By default,
* Gson will exclude all fields marked transient or static. This method will override that
* behavior.
*
* @param modifiers the field modifiers. You must use the modifiers specified in the
* {@link java.lang.reflect.Modifier} class. For example,
* {@link java.lang.reflect.Modifier#TRANSIENT},
* {@link java.lang.reflect.Modifier#STATIC}.
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
*/
public GsonBuilder excludeFieldsWithModifiers(int... modifiers) {
modifierBasedExclusionStrategy = new ModifierBasedExclusionStrategy(modifiers);
return this;
}
/**
* Makes the output JSON non-executable in Javascript by prefixing the generated JSON with some
* special text. This prevents attacks from third-party sites through script sourcing. See
* <a href="http://code.google.com/p/google-gson/issues/detail?id=42">Gson Issue 42</a>
* for details.
*
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.3
*/
public GsonBuilder generateNonExecutableJson() {
this.generateNonExecutableJson = true;
return this;
}
/**
* Configures Gson to exclude all fields from consideration for serialization or deserialization
* that do not have the {@link com.massivecraft.factions.gson.annotations.Expose} annotation.
*
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
*/
public GsonBuilder excludeFieldsWithoutExposeAnnotation() {
excludeFieldsWithoutExposeAnnotation = true;
return this;
}
/**
* Configure Gson to serialize null fields. By default, Gson omits all fields that are null
* during serialization.
*
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.2
*/
public GsonBuilder serializeNulls() {
this.serializeNulls = true;
return this;
}
/**
* Enabling this feature will only change the serialized form if the map key is
* a complex type (i.e. non-primitive) in its <strong>serialized</strong> JSON
* form. The default implementation of map serialization uses {@code toString()}
* on the key; however, when this is called then one of the following cases
* apply:
*
* <h3>Maps as JSON objects</h3>
* For this case, assume that a type adapter is registered to serialize and
* deserialize some {@code Point} class, which contains an x and y coordinate,
* to/from the JSON Primitive string value {@code "(x,y)"}. The Java map would
* then be serialized as a {@link JsonObject}.
*
* <p>Below is an example:
* <pre> {@code
* Gson gson = new GsonBuilder()
* .register(Point.class, new MyPointTypeAdapter())
* .enableComplexMapKeySerialization()
* .create();
*
* Map<Point, String> original = new LinkedHashMap<Point, String>();
* original.put(new Point(5, 6), "a");
* original.put(new Point(8, 8), "b");
* System.out.println(gson.toJson(original, type));
* }</pre>
* The above code prints this JSON object:<pre> {@code
* {
* "(5,6)": "a",
* "(8,8)": "b"
* }
* }</pre>
*
* <h3>Maps as JSON arrays</h3>
* For this case, assume that a type adapter was NOT registered for some
* {@code Point} class, but rather the default Gson serialization is applied.
* In this case, some {@code new Point(2,3)} would serialize as {@code
* {"x":2,"y":5}}.
*
* <p>Given the assumption above, a {@code Map<Point, String>} will be
* serialize as an array of arrays (can be viewed as an entry set of pairs).
*
* <p>Below is an example of serializing complex types as JSON arrays:
* <pre> {@code
* Gson gson = new GsonBuilder()
* .enableComplexMapKeySerialization()
* .create();
*
* Map<Point, String> original = new LinkedHashMap<Point, String>();
* original.put(new Point(5, 6), "a");
* original.put(new Point(8, 8), "b");
* System.out.println(gson.toJson(original, type));
* }
*
* The JSON output would look as follows:
* <pre> {@code
* [
* [
* {
* "x": 5,
* "y": 6
* },
* "a"
* ],
* [
* {
* "x": 8,
* "y": 8
* },
* "b"
* ]
* ]
* }</pre>
*
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.7
*/
public GsonBuilder enableComplexMapKeySerialization() {
registerTypeHierarchyAdapter(Map.class, COMPLEX_KEY_MAP_TYPE_ADAPTER);
return this;
}
/**
* Configures Gson to exclude inner classes during serialization.
*
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.3
*/
public GsonBuilder disableInnerClassSerialization() {
serializeInnerClasses = false;
return this;
}
/**
* Configures Gson to apply a specific serialization policy for {@code Long} and {@code long}
* objects.
*
* @param serializationPolicy the particular policy to use for serializing longs.
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.3
*/
public GsonBuilder setLongSerializationPolicy(LongSerializationPolicy serializationPolicy) {
this.longSerializationPolicy = serializationPolicy;
return this;
}
/**
* Configures Gson to apply a specific naming policy to an object's field during serialization
* and deserialization.
*
* @param namingConvention the JSON field naming convention to use for serialization and
* deserialization.
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
*/
public GsonBuilder setFieldNamingPolicy(FieldNamingPolicy namingConvention) {
return setFieldNamingStrategy(namingConvention.getFieldNamingPolicy());
}
/**
* Configures Gson to apply a specific naming policy strategy to an object's field during
* serialization and deserialization.
*
* @param fieldNamingStrategy the actual naming strategy to apply to the fields
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.3
*/
public GsonBuilder setFieldNamingStrategy(FieldNamingStrategy fieldNamingStrategy) {
return setFieldNamingStrategy(new FieldNamingStrategy2Adapter(fieldNamingStrategy));
}
/**
* Configures Gson to apply a specific naming policy strategy to an object's field during
* serialization and deserialization.
*
* @param fieldNamingStrategy the actual naming strategy to apply to the fields
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
*/
GsonBuilder setFieldNamingStrategy(FieldNamingStrategy2 fieldNamingStrategy) {
this.fieldNamingPolicy =
new SerializedNameAnnotationInterceptingNamingPolicy(fieldNamingStrategy);
return this;
}
/**
* Configures Gson to apply a set of exclusion strategies during both serialization and
* deserialization. Each of the {@code strategies} will be applied as a disjunction rule.
* This means that if one of the {@code strategies} suggests that a field (or class) should be
* skipped then that field (or object) is skipped during serializaiton/deserialization.
*
* @param strategies the set of strategy object to apply during object (de)serialization.
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.4
*/
public GsonBuilder setExclusionStrategies(ExclusionStrategy... strategies) {
List<ExclusionStrategy> strategyList = Arrays.asList(strategies);
serializeExclusionStrategies.addAll(strategyList);
deserializeExclusionStrategies.addAll(strategyList);
return this;
}
/**
* Configures Gson to apply the passed in exclusion strategy during serialization.
* If this method is invoked numerous times with different exclusion strategy objects
* then the exclusion strategies that were added will be applied as a disjunction rule.
* This means that if one of the added exclusion strategies suggests that a field (or
* class) should be skipped then that field (or object) is skipped during its
* serialization.
*
* @param strategy an exclusion strategy to apply during serialization.
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.7
*/
public GsonBuilder addSerializationExclusionStrategy(ExclusionStrategy strategy) {
serializeExclusionStrategies.add(strategy);
return this;
}
/**
* Configures Gson to apply the passed in exclusion strategy during deserialization.
* If this method is invoked numerous times with different exclusion strategy objects
* then the exclusion strategies that were added will be applied as a disjunction rule.
* This means that if one of the added exclusion strategies suggests that a field (or
* class) should be skipped then that field (or object) is skipped during its
* deserialization.
*
* @param strategy an exclusion strategy to apply during deserialization.
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.7
*/
public GsonBuilder addDeserializationExclusionStrategy(ExclusionStrategy strategy) {
deserializeExclusionStrategies.add(strategy);
return this;
}
/**
* Configures Gson to output Json that fits in a page for pretty printing. This option only
* affects Json serialization.
*
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
*/
public GsonBuilder setPrettyPrinting() {
prettyPrinting = true;
return this;
}
/**
* By default, Gson escapes HTML characters such as &lt; &gt; etc. Use this option to configure
* Gson to pass-through HTML characters as is.
*
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.3
*/
public GsonBuilder disableHtmlEscaping() {
this.escapeHtmlChars = false;
return this;
}
/**
* Configures Gson to serialize {@code Date} objects according to the pattern provided. You can
* call this method or {@link #setDateFormat(int)} multiple times, but only the last invocation
* will be used to decide the serialization format.
*
* <p>The date format will be used to serialize and deserialize {@link java.util.Date}, {@link
* java.sql.Timestamp} and {@link java.sql.Date}.
*
* <p>Note that this pattern must abide by the convention provided by {@code SimpleDateFormat}
* class. See the documentation in {@link java.text.SimpleDateFormat} for more information on
* valid date and time patterns.</p>
*
* @param pattern the pattern that dates will be serialized/deserialized to/from
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.2
*/
public GsonBuilder setDateFormat(String pattern) {
// TODO(Joel): Make this fail fast if it is an invalid date format
this.datePattern = pattern;
return this;
}
/**
* Configures Gson to to serialize {@code Date} objects according to the style value provided.
* You can call this method or {@link #setDateFormat(String)} multiple times, but only the last
* invocation will be used to decide the serialization format.
*
* <p>Note that this style value should be one of the predefined constants in the
* {@code DateFormat} class. See the documentation in {@link java.text.DateFormat} for more
* information on the valid style constants.</p>
*
* @param style the predefined date style that date objects will be serialized/deserialized
* to/from
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.2
*/
public GsonBuilder setDateFormat(int style) {
this.dateStyle = style;
this.datePattern = null;
return this;
}
/**
* Configures Gson to to serialize {@code Date} objects according to the style value provided.
* You can call this method or {@link #setDateFormat(String)} multiple times, but only the last
* invocation will be used to decide the serialization format.
*
* <p>Note that this style value should be one of the predefined constants in the
* {@code DateFormat} class. See the documentation in {@link java.text.DateFormat} for more
* information on the valid style constants.</p>
*
* @param dateStyle the predefined date style that date objects will be serialized/deserialized
* to/from
* @param timeStyle the predefined style for the time portion of the date objects
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.2
*/
public GsonBuilder setDateFormat(int dateStyle, int timeStyle) {
this.dateStyle = dateStyle;
this.timeStyle = timeStyle;
this.datePattern = null;
return this;
}
/**
* Configures Gson for custom serialization or deserialization. This method combines the
* registration of an {@link InstanceCreator}, {@link JsonSerializer}, and a
* {@link JsonDeserializer}. It is best used when a single object {@code typeAdapter} implements
* all the required interfaces for custom serialization with Gson. If an instance creator,
* serializer or deserializer was previously registered for the specified {@code type}, it is
* overwritten.
*
* @param type the type definition for the type adapter being registered
* @param typeAdapter This object must implement at least one of the {@link InstanceCreator},
* {@link JsonSerializer}, and a {@link JsonDeserializer} interfaces.
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
*/
public GsonBuilder registerTypeAdapter(Type type, Object typeAdapter) {
$Gson$Preconditions.checkArgument(typeAdapter instanceof JsonSerializer<?>
|| typeAdapter instanceof JsonDeserializer<?> || typeAdapter instanceof InstanceCreator<?>);
if (typeAdapter instanceof InstanceCreator<?>) {
registerInstanceCreator(type, (InstanceCreator<?>) typeAdapter);
}
if (typeAdapter instanceof JsonSerializer<?>) {
registerSerializer(type, (JsonSerializer<?>) typeAdapter);
}
if (typeAdapter instanceof JsonDeserializer<?>) {
registerDeserializer(type, (JsonDeserializer<?>) typeAdapter);
}
return this;
}
/**
* Configures Gson to use a custom {@link InstanceCreator} for the specified type. If an instance
* creator was previously registered for the specified class, it is overwritten. Since this method
* takes a type instead of a Class object, it can be used to register a specific handler for a
* generic type corresponding to a raw type.
*
* @param <T> the type for which instance creator is being registered
* @param typeOfT The Type definition for T
* @param instanceCreator the instance creator for T
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
*/
private <T> GsonBuilder registerInstanceCreator(Type typeOfT,
InstanceCreator<? extends T> instanceCreator) {
instanceCreators.register(typeOfT, instanceCreator);
return this;
}
/**
* Configures Gson to use a custom JSON serializer for the specified type. You should use this
* method if you want to register different serializers for different generic types corresponding
* to a raw type.
*
* @param <T> the type for which the serializer is being registered
* @param typeOfT The type definition for T
* @param serializer the custom serializer
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
*/
private <T> GsonBuilder registerSerializer(Type typeOfT, final JsonSerializer<T> serializer) {
serializers.register(typeOfT, serializer);
return this;
}
/**
* Configures Gson to use a custom JSON deserializer for the specified type. You should use this
* method if you want to register different deserializers for different generic types
* corresponding to a raw type.
*
* @param <T> the type for which the deserializer is being registered
* @param typeOfT The type definition for T
* @param deserializer the custom deserializer
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
*/
private <T> GsonBuilder registerDeserializer(Type typeOfT, JsonDeserializer<T> deserializer) {
deserializers.register(typeOfT, new JsonDeserializerExceptionWrapper<T>(deserializer));
return this;
}
/**
* Configures Gson for custom serialization or deserialization for an inheritance type hierarchy.
* This method combines the registration of an {@link InstanceCreator}, {@link JsonSerializer},
* and a {@link JsonDeserializer}. It is best used when a single object {@code typeAdapter}
* implements all the required interfaces for custom serialization with Gson.
* If an instance creator, serializer or deserializer was previously registered for the specified
* type hierarchy, it is overwritten. If an instance creator, serializer or deserializer is
* registered for a specific type in the type hierarchy, it will be invoked instead of the one
* registered for the type hierarchy.
*
* @param baseType the class definition for the type adapter being registered for the base class
* or interface
* @param typeAdapter This object must implement at least one of the {@link InstanceCreator},
* {@link JsonSerializer}, and a {@link JsonDeserializer} interfaces.
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.7
*/
public GsonBuilder registerTypeHierarchyAdapter(Class<?> baseType, Object typeAdapter) {
$Gson$Preconditions.checkArgument(typeAdapter instanceof JsonSerializer<?>
|| typeAdapter instanceof JsonDeserializer<?> || typeAdapter instanceof InstanceCreator<?>);
if (typeAdapter instanceof InstanceCreator<?>) {
registerInstanceCreatorForTypeHierarchy(baseType, (InstanceCreator<?>) typeAdapter);
}
if (typeAdapter instanceof JsonSerializer<?>) {
registerSerializerForTypeHierarchy(baseType, (JsonSerializer<?>) typeAdapter);
}
if (typeAdapter instanceof JsonDeserializer<?>) {
registerDeserializerForTypeHierarchy(baseType, (JsonDeserializer<?>) typeAdapter);
}
return this;
}
private <T> GsonBuilder registerInstanceCreatorForTypeHierarchy(Class<?> classOfT,
InstanceCreator<? extends T> instanceCreator) {
instanceCreators.registerForTypeHierarchy(classOfT, instanceCreator);
return this;
}
private <T> GsonBuilder registerSerializerForTypeHierarchy(Class<?> classOfT,
final JsonSerializer<T> serializer) {
serializers.registerForTypeHierarchy(classOfT, serializer);
return this;
}
private <T> GsonBuilder registerDeserializerForTypeHierarchy(Class<?> classOfT,
JsonDeserializer<T> deserializer) {
deserializers.registerForTypeHierarchy(classOfT,
new JsonDeserializerExceptionWrapper<T>(deserializer));
return this;
}
/**
* Section 2.4 of <a href="http://www.ietf.org/rfc/rfc4627.txt">JSON specification</a> disallows
* special double values (NaN, Infinity, -Infinity). However,
* <a href="http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf">Javascript
* specification</a> (see section 4.3.20, 4.3.22, 4.3.23) allows these values as valid Javascript
* values. Moreover, most JavaScript engines will accept these special values in JSON without
* problem. So, at a practical level, it makes sense to accept these values as valid JSON even
* though JSON specification disallows them.
*
* <p>Gson always accepts these special values during deserialization. However, it outputs
* strictly compliant JSON. Hence, if it encounters a float value {@link Float#NaN},
* {@link Float#POSITIVE_INFINITY}, {@link Float#NEGATIVE_INFINITY}, or a double value
* {@link Double#NaN}, {@link Double#POSITIVE_INFINITY}, {@link Double#NEGATIVE_INFINITY}, it
* will throw an {@link IllegalArgumentException}. This method provides a way to override the
* default behavior when you know that the JSON receiver will be able to handle these special
* values.
*
* @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
* @since 1.3
*/
public GsonBuilder serializeSpecialFloatingPointValues() {
this.serializeSpecialFloatingPointValues = true;
return this;
}
/**
* Creates a {@link Gson} instance based on the current configuration. This method is free of
* side-effects to this {@code GsonBuilder} instance and hence can be called multiple times.
*
* @return an instance of Gson configured with the options currently set in this builder
*/
public Gson create() {
List<ExclusionStrategy> deserializationStrategies =
new LinkedList<ExclusionStrategy>(deserializeExclusionStrategies);
List<ExclusionStrategy> serializationStrategies =
new LinkedList<ExclusionStrategy>(serializeExclusionStrategies);
deserializationStrategies.add(modifierBasedExclusionStrategy);
serializationStrategies.add(modifierBasedExclusionStrategy);
if (!serializeInnerClasses) {
deserializationStrategies.add(innerClassExclusionStrategy);
serializationStrategies.add(innerClassExclusionStrategy);
}
if (ignoreVersionsAfter != VersionConstants.IGNORE_VERSIONS) {
VersionExclusionStrategy versionExclusionStrategy =
new VersionExclusionStrategy(ignoreVersionsAfter);
deserializationStrategies.add(versionExclusionStrategy);
serializationStrategies.add(versionExclusionStrategy);
}
if (excludeFieldsWithoutExposeAnnotation) {
deserializationStrategies.add(exposeAnnotationDeserializationExclusionStrategy);
serializationStrategies.add(exposeAnnotationSerializationExclusionStrategy);
}
ParameterizedTypeHandlerMap<JsonSerializer<?>> customSerializers =
DefaultTypeAdapters.DEFAULT_HIERARCHY_SERIALIZERS.copyOf();
customSerializers.register(serializers.copyOf());
ParameterizedTypeHandlerMap<JsonDeserializer<?>> customDeserializers =
DefaultTypeAdapters.DEFAULT_HIERARCHY_DESERIALIZERS.copyOf();
customDeserializers.register(deserializers.copyOf());
addTypeAdaptersForDate(datePattern, dateStyle, timeStyle, customSerializers,
customDeserializers);
customSerializers.registerIfAbsent(DefaultTypeAdapters.getDefaultSerializers(
serializeSpecialFloatingPointValues, longSerializationPolicy));
customDeserializers.registerIfAbsent(DefaultTypeAdapters.getDefaultDeserializers());
ParameterizedTypeHandlerMap<InstanceCreator<?>> customInstanceCreators =
instanceCreators.copyOf();
customInstanceCreators.registerIfAbsent(DefaultTypeAdapters.getDefaultInstanceCreators());
customSerializers.makeUnmodifiable();
customDeserializers.makeUnmodifiable();
instanceCreators.makeUnmodifiable();
MappedObjectConstructor objConstructor = new MappedObjectConstructor(customInstanceCreators);
Gson gson = new Gson(new DisjunctionExclusionStrategy(deserializationStrategies),
new DisjunctionExclusionStrategy(serializationStrategies),
fieldNamingPolicy, objConstructor, serializeNulls,
customSerializers, customDeserializers, generateNonExecutableJson, escapeHtmlChars,
prettyPrinting);
return gson;
}
private static void addTypeAdaptersForDate(String datePattern, int dateStyle, int timeStyle,
ParameterizedTypeHandlerMap<JsonSerializer<?>> serializers,
ParameterizedTypeHandlerMap<JsonDeserializer<?>> deserializers) {
DefaultDateTypeAdapter dateTypeAdapter = null;
if (datePattern != null && !"".equals(datePattern.trim())) {
dateTypeAdapter = new DefaultDateTypeAdapter(datePattern);
} else if (dateStyle != DateFormat.DEFAULT && timeStyle != DateFormat.DEFAULT) {
dateTypeAdapter = new DefaultDateTypeAdapter(dateStyle, timeStyle);
}
if (dateTypeAdapter != null) {
registerIfAbsent(Date.class, serializers, dateTypeAdapter);
registerIfAbsent(Date.class, deserializers, dateTypeAdapter);
registerIfAbsent(Timestamp.class, serializers, dateTypeAdapter);
registerIfAbsent(Timestamp.class, deserializers, dateTypeAdapter);
registerIfAbsent(java.sql.Date.class, serializers, dateTypeAdapter);
registerIfAbsent(java.sql.Date.class, deserializers, dateTypeAdapter);
}
}
private static <T> void registerIfAbsent(Class<?> type,
ParameterizedTypeHandlerMap<T> adapters, T adapter) {
if (!adapters.hasSpecificHandlerFor(type)) {
adapters.register(type, adapter);
}
}
}