| package org.codehaus.jackson.map; |
| |
| import java.io.*; |
| import java.net.URL; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.codehaus.jackson.*; |
| import org.codehaus.jackson.io.SegmentedStringWriter; |
| import org.codehaus.jackson.map.annotate.JsonTypeInfo; |
| import org.codehaus.jackson.map.deser.StdDeserializationContext; |
| import org.codehaus.jackson.map.deser.StdDeserializerProvider; |
| import org.codehaus.jackson.map.introspect.BasicClassIntrospector; |
| import org.codehaus.jackson.map.introspect.JacksonAnnotationIntrospector; |
| import org.codehaus.jackson.map.ser.StdSerializerProvider; |
| import org.codehaus.jackson.map.ser.BeanSerializerFactory; |
| import org.codehaus.jackson.map.jsontype.JsonTypeResolverBuilder; |
| import org.codehaus.jackson.map.jsontype.impl.StdTypeResolverBuilder; |
| import org.codehaus.jackson.map.type.TypeFactory; |
| import org.codehaus.jackson.node.ArrayNode; |
| import org.codehaus.jackson.node.JsonNodeFactory; |
| import org.codehaus.jackson.node.TreeTraversingParser; |
| import org.codehaus.jackson.node.NullNode; |
| import org.codehaus.jackson.node.ObjectNode; |
| import org.codehaus.jackson.schema.JsonSchema; |
| import org.codehaus.jackson.type.JavaType; |
| import org.codehaus.jackson.type.TypeReference; |
| import org.codehaus.jackson.util.TokenBuffer; |
| |
| /** |
| * This mapper (or, data binder, or codec) provides functionality for |
| * conversting between Java objects (instances of JDK provided core classes, |
| * beans), and matching JSON constructs. |
| * It will use instances of {@link JsonParser} and {@link JsonGenerator} |
| * for implementing actual reading/writing of JSON. |
| *<p> |
| * The main conversion API is defined in {@link ObjectCodec}, so that |
| * implementation details of this class need not be exposed to |
| * streaming parser and generator classes. |
| *<p> |
| * Note on caching: root-level deserializers are always cached, and accessed |
| * using full (generics-aware) type information. This is different from |
| * caching of referenced types, which is more limited and is done only |
| * for a subset of all deserializer types. The main reason for difference |
| * is that at root-level there is no incoming reference (and hence no |
| * referencing property, no referral information or annotations to |
| * produce differing deserializers), and that the performance impact |
| * greatest at root level (since it'll essentially cache the full |
| * graph of deserializers involved). |
| */ |
| public class ObjectMapper |
| extends ObjectCodec |
| { |
| /* |
| /************************************************* |
| /* Helper classes, enums |
| /************************************************* |
| */ |
| |
| /** |
| * Enumeration used with {@link ObjectMapper#enableDefaultTyping()} |
| * to specify what kinda of types (classes) default typing should |
| * be used for. It will only be used if no explicit type information |
| * is found, but this enumeration further limits subset of those |
| * types. |
| * |
| * @since 1.5 |
| */ |
| public enum DefaultTyping { |
| /** |
| * This value means that only properties that have |
| * {@link java.lang.Object} as declared type (including |
| * generic types without explicit type) will use default |
| * typing. |
| */ |
| JAVA_LANG_OBJECT, |
| |
| /** |
| * Value that means that default typing will be used for |
| * properties with declared type of {@link java.lang.Object} |
| * or an abstract type (abstract class or interface). |
| */ |
| OBJECT_AND_NON_CONCRETE |
| } |
| |
| /** |
| * Customized {@link JsonTypeResolverBuilder} that provides |
| * resolver builders based on its configuration. It is used |
| * when default typing is enabled (see |
| * {@link ObjectMapper#enableDefaultTyping()} for details). |
| */ |
| public static class DefaultTypeResolverBuilder |
| extends StdTypeResolverBuilder |
| { |
| /** |
| * Definition of what types is this default typer valid for. |
| */ |
| protected final DefaultTyping _appliesFor; |
| |
| public DefaultTypeResolverBuilder(DefaultTyping t) { |
| _appliesFor = t; |
| } |
| |
| public TypeDeserializer buildTypeDeserializer(JavaType baseType) { |
| return useForType(baseType) ? super.buildTypeDeserializer(baseType) : null; |
| } |
| |
| public TypeSerializer buildTypeSerializer(JavaType baseType) { |
| return useForType(baseType) ? super.buildTypeSerializer(baseType) : null; |
| } |
| |
| /** |
| * Method called to check if the default type handler should be |
| * used for given type. |
| */ |
| public boolean useForType(JavaType t) |
| { |
| // Always applicable for Object.class |
| if (t.getRawClass() == Object.class) { |
| return true; |
| } |
| // Also, can be applicable for non-concrete types (abstract class, interface) |
| if (!t.isConcrete() && _appliesFor == DefaultTyping.OBJECT_AND_NON_CONCRETE) { |
| return true; |
| } |
| // otherwise, not used |
| return false; |
| } |
| } |
| |
| /* |
| /************************************************* |
| /* Internal constants, singletons |
| /************************************************* |
| */ |
| |
| private final static JavaType JSON_NODE_TYPE = TypeFactory.type(JsonNode.class); |
| |
| /* !!! 03-Apr-2009, tatu: Should try to avoid direct reference... but not |
| * sure what'd be simple and elegant way. So until then: |
| */ |
| protected final static ClassIntrospector<? extends BeanDescription> DEFAULT_INTROSPECTOR = BasicClassIntrospector.instance; |
| |
| // 16-May-2009, tatu: Ditto ^^^ |
| protected final static AnnotationIntrospector DEFAULT_ANNOTATION_INTROSPECTOR = new JacksonAnnotationIntrospector(); |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Configuration settings, shared |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Factory used to create {@link JsonParser} and {@link JsonGenerator} |
| * instances as necessary. |
| */ |
| protected final JsonFactory _jsonFactory; |
| |
| /** |
| * Object that defines how to add type information for types that do not |
| * have explicit type information settings (which are usually |
| * indicated by {@link org.codehaus.jackson.map.annotate.JsonTypeInfo}) |
| * If set to null, no type information will be added unless annotations |
| * are used; if set to non-null, resolver builder is used to check |
| * which type serializers and deserializers are to be used (if any) |
| * |
| * @since 1.5 |
| */ |
| protected JsonTypeResolverBuilder<?> _defaultTyper; |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Configuration settings, serialization |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Configuration object that defines basic global |
| * settings for the serialization process |
| */ |
| protected SerializationConfig _serializationConfig; |
| |
| /** |
| * Object that manages access to serializers used for serialization, |
| * including caching. |
| * It is configured with {@link #_serializerFactory} to allow |
| * for constructing custom serializers. |
| */ |
| protected SerializerProvider _serializerProvider; |
| |
| /** |
| * Serializer factory used for constructing serializers. |
| */ |
| protected SerializerFactory _serializerFactory; |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Configuration settings, deserialization |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Configuration object that defines basic global |
| * settings for the serialization process |
| */ |
| protected DeserializationConfig _deserializationConfig; |
| |
| /** |
| * Object that manages access to deserializers used for deserializing |
| * JSON content into Java objects, including possible caching |
| * of the deserializers. It contains a reference to |
| * {@link DeserializerFactory} to use for constructing acutal deserializers. |
| */ |
| protected DeserializerProvider _deserializerProvider; |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Configuration settings, other |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Node factory to use for creating |
| * |
| * @since 1.2 |
| */ |
| protected JsonNodeFactory _nodeFactory; |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Caching |
| //////////////////////////////////////////////////// |
| */ |
| |
| /* Note: handling of serializers and deserializers is not symmetric; |
| * and as a result, only root-level deserializers can be cached here. |
| * This is mostly because typing and resolution for deserializers is |
| * fully static; whereas it is quite dynamic for serialization. |
| */ |
| |
| /** |
| * We will use a separate main-level Map for keeping track |
| * of root-level deserializers. This is where most succesful |
| * cache lookups get resolved. |
| * Map will contain resolvers for all kinds of types, including |
| * container types: this is different from the component cache |
| * which will only cache bean deserializers. |
| *<p> |
| * Given that we don't expect much concurrency for additions |
| * (should very quickly converge to zero after startup), let's |
| * explicitly define a low concurrency setting. |
| *<p> |
| * Since version 1.5, these may are either "raw" deserializers (when |
| * no type information is needed for base type), or type-wrapped |
| * deserializers (if it is needed) |
| */ |
| final protected ConcurrentHashMap<JavaType, JsonDeserializer<Object>> _rootDeserializers |
| = new ConcurrentHashMap<JavaType, JsonDeserializer<Object>>(64, 0.6f, 2); |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Life-cycle (construction, configuration) |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Default constructor, which will construct the default |
| * {@link JsonFactory} as necessary, use |
| * {@link StdSerializerProvider} as its |
| * {@link SerializerProvider}, and |
| * {@link BeanSerializerFactory} as its |
| * {@link SerializerFactory}. |
| * This means that it |
| * can serialize all standard JDK types, as well as regular |
| * Java Beans (based on method names and Jackson-specific annotations), |
| * but does not support JAXB annotations. |
| */ |
| public ObjectMapper() |
| { |
| this(null, null, null); |
| } |
| |
| /** |
| * Construct mapper that uses specified {@link JsonFactory} |
| * for constructing necessary {@link JsonParser}s and/or |
| * {@link JsonGenerator}s. |
| */ |
| public ObjectMapper(JsonFactory jf) |
| { |
| this(jf, null, null); |
| } |
| |
| /** |
| * Construct mapper that uses specified {@link SerializerFactory} |
| * for constructing necessary serializers. |
| * |
| * @deprecated Use other constructors instead; note that |
| * you can just set serializer factory with {@link #setSerializerFactory} |
| */ |
| public ObjectMapper(SerializerFactory sf) |
| { |
| this(null, null, null); |
| setSerializerFactory(sf); |
| } |
| |
| public ObjectMapper(JsonFactory jf, |
| SerializerProvider sp, DeserializerProvider dp) |
| { |
| this(jf, sp, dp, null, null); |
| } |
| |
| /** |
| * |
| * @param jf JsonFactory to use: if null, a new {@link MappingJsonFactory} will be constructed |
| * @param sp SerializerProvider to use: if null, a {@link StdSerializerProvider} will be constructed |
| * @param dp DeserializerProvider to use: if null, a {@link StdDeserializerProvider} will be constructed |
| * @param sconfig Serialization configuration to use; if null, basic {@link SerializationConfig} |
| * will be constructed |
| * @param dconfig Deserialization configuration to use; if null, basic {@link DeserializationConfig} |
| * will be constructed |
| */ |
| public ObjectMapper(JsonFactory jf, |
| SerializerProvider sp, DeserializerProvider dp, |
| SerializationConfig sconfig, DeserializationConfig dconfig) |
| { |
| /* 02-Mar-2009, tatu: Important: we MUST default to using |
| * the mapping factory, otherwise tree serialization will |
| * have problems with POJONodes. |
| * 03-Jan-2010, tatu: and obviously we also must pass 'this', |
| * to create actual linking. |
| */ |
| _jsonFactory = (jf == null) ? new MappingJsonFactory(this) : jf; |
| _serializationConfig = (sconfig == null) ? new SerializationConfig(DEFAULT_INTROSPECTOR, DEFAULT_ANNOTATION_INTROSPECTOR) : sconfig; |
| _deserializationConfig = (dconfig == null) ? new DeserializationConfig(DEFAULT_INTROSPECTOR, DEFAULT_ANNOTATION_INTROSPECTOR) : dconfig; |
| _serializerProvider = (sp == null) ? new StdSerializerProvider() : sp; |
| _deserializerProvider = (dp == null) ? new StdDeserializerProvider() : dp; |
| |
| // Default serializer factory is stateless, can just assign |
| _serializerFactory = BeanSerializerFactory.instance; |
| |
| // and use standard JsonNodeFactory initially |
| _nodeFactory = JsonNodeFactory.instance; |
| } |
| |
| /** |
| * Method for setting specific {@link SerializerFactory} to use |
| * for constructing (bean) serializers. |
| */ |
| public ObjectMapper setSerializerFactory(SerializerFactory f) { |
| _serializerFactory = f; |
| return this; |
| } |
| |
| /** |
| * Method for setting specific {@link SerializerProvider} to use |
| * for handling caching of {@link JsonSerializer} instances. |
| */ |
| public ObjectMapper setSerializerProvider(SerializerProvider p) { |
| _serializerProvider = p; |
| return this; |
| } |
| |
| /** |
| * @since 1.4 |
| */ |
| public SerializerProvider getSerializerProvider() { |
| return _serializerProvider; |
| } |
| |
| /** |
| * Method for setting specific {@link DeserializerProvider} to use |
| * for handling caching of {@link JsonDeserializer} instances. |
| */ |
| public ObjectMapper setDeserializerProvider(DeserializerProvider p) { |
| _deserializerProvider = p; |
| return this; |
| } |
| |
| /** |
| * @since 1.4 |
| */ |
| public DeserializerProvider getDeserializerProvider() { |
| return _deserializerProvider; |
| } |
| |
| /** |
| * Method for specifying {@link JsonNodeFactory} to use for |
| * constructing root level tree nodes (via method |
| * {@link #createObjectNode} |
| * |
| * @since 1.2 |
| */ |
| public ObjectMapper setNodeFactory(JsonNodeFactory f) { |
| _nodeFactory = f; |
| return this; |
| } |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Access to configuration settings |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Method that returns |
| * the shared default {@link SerializationConfig} object |
| * that defines configuration settings for serialization. |
| * Returned object is "live" meaning that changes will be used |
| * for future serialization operations for this mapper when using |
| * mapper's default configuration |
| */ |
| public SerializationConfig getSerializationConfig() { |
| return _serializationConfig; |
| } |
| |
| /** |
| * Method that creates a copy of |
| * the shared default {@link SerializationConfig} object |
| * that defines configuration settings for serialization. |
| * Since it is a copy, any changes made to the configuration |
| * object will NOT directly affect serialization done using |
| * basic serialization methods that use the shared object (that is, |
| * ones that do not take separate {@link SerializationConfig} |
| * argument. |
| *<p> |
| * The use case is that of changing object settings of the configuration |
| * (like date format being used, see {@link SerializationConfig#setDateFormat}). |
| */ |
| public SerializationConfig copySerializationConfig() { |
| return _serializationConfig.createUnshared(_defaultTyper); |
| } |
| |
| /** |
| * Method for replacing the shared default serialization configuration |
| * object. |
| */ |
| public ObjectMapper setSerializationConfig(SerializationConfig cfg) { |
| _serializationConfig = cfg; |
| return this; |
| } |
| |
| /** |
| * Method for changing state of an on/off serialization feature for |
| * this object mapper. |
| *<p> |
| * This is method is basically a shortcut method for calling |
| * {@link SerializationConfig#set} on the shared {@link SerializationConfig} |
| * object with given arguments. |
| */ |
| public ObjectMapper configure(SerializationConfig.Feature f, boolean state) { |
| _serializationConfig.set(f, state); |
| return this; |
| } |
| |
| /** |
| * Method that returns |
| * the shared default {@link DeserializationConfig} object |
| * that defines configuration settings for deserialization. |
| * Returned object is "live" meaning that changes will be used |
| * for future deserialization operations for this mapper when using |
| * mapper's default configuration |
| */ |
| public DeserializationConfig getDeserializationConfig() { |
| return _deserializationConfig; |
| } |
| |
| /** |
| * Method that creates a copy of |
| * the shared default {@link DeserializationConfig} object |
| * that defines configuration settings for deserialization. |
| * Since it is a copy, any changes made to the configuration |
| * object will NOT directly affect deserialization done using |
| * basic deserialization methods that use the shared object (that is, |
| * ones that do not take separate {@link DeserializationConfig} |
| * argument. |
| *<p> |
| * The use case is that of changing object settings of the configuration |
| * (like deserialization problem handler, |
| * see {@link DeserializationConfig#addHandler}) |
| */ |
| public DeserializationConfig copyDeserializationConfig() { |
| return _deserializationConfig.createUnshared(_defaultTyper); |
| } |
| |
| /** |
| * Method for replacing the shared default deserialization configuration |
| * object. |
| */ |
| public ObjectMapper setDeserializationConfig(DeserializationConfig cfg) { |
| _deserializationConfig = cfg; |
| return this; |
| } |
| |
| /** |
| * Method for changing state of an on/off deserialization feature for |
| * this object mapper. |
| *<p> |
| * This is method is basically a shortcut method for calling |
| * {@link DeserializationConfig#set} on the shared {@link DeserializationConfig} |
| * object with given arguments. |
| */ |
| public ObjectMapper configure(DeserializationConfig.Feature f, boolean state) { |
| _deserializationConfig.set(f, state); |
| return this; |
| } |
| |
| /** |
| * Method that can be used to get hold of {@link JsonFactory} that this |
| * mapper uses if it needs to construct {@link JsonParser}s |
| * and/or {@link JsonGenerator}s. |
| * |
| * @return {@link JsonFactory} that this mapper uses when it needs to |
| * construct Json parser and generators |
| */ |
| public JsonFactory getJsonFactory() { return _jsonFactory; } |
| |
| /** |
| * Method for changing state of an on/off {@link JsonParser} feature for |
| * {@link JsonFactory} instance this object mapper uses. |
| *<p> |
| * This is method is basically a shortcut method for calling |
| * {@link JsonFactory#setParserFeature} on the shared |
| * {@link JsonFactory} this mapper uses (which is accessible |
| * using {@link #getJsonFactory}). |
| * |
| * @since 1.2 |
| */ |
| public ObjectMapper configure(JsonParser.Feature f, boolean state) { |
| _jsonFactory.configure(f, state); |
| return this; |
| } |
| |
| /** |
| * Method for changing state of an on/off {@link JsonGenerator} feature for |
| * {@link JsonFactory} instance this object mapper uses. |
| *<p> |
| * This is method is basically a shortcut method for calling |
| * {@link JsonFactory#setGeneratorFeature} on the shared |
| * {@link JsonFactory} this mapper uses (which is accessible |
| * using {@link #getJsonFactory}). |
| * |
| * @since 1.2 |
| */ |
| public ObjectMapper configure(JsonGenerator.Feature f, boolean state) { |
| _jsonFactory.configure(f, state); |
| return this; |
| } |
| |
| /** |
| * Method that can be used to get hold of {@link JsonNodeFactory} |
| * that this mapper will use when directly constructing |
| * root {@link JsonNode} instances for Trees. |
| * |
| * @since 1.2 |
| */ |
| public JsonNodeFactory getNodeFactory() { |
| return _nodeFactory; |
| } |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Type information configuration (1.5+) |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Convenience method that is equivalant to calling |
| *<pre> |
| * enableObjectTyping(DefaultTyping.OBJECT_AND_NON_CONCRETE); |
| *</pre> |
| */ |
| public ObjectMapper enableDefaultTyping() { |
| return enableDefaultTyping(DefaultTyping.OBJECT_AND_NON_CONCRETE); |
| } |
| |
| /** |
| * Convenience method that is equivalant to calling |
| *<pre> |
| * enableObjectTyping(dti, JsonTypeInfo.As.WRAPPER_ARRAY); |
| *</pre> |
| */ |
| public ObjectMapper enableDefaultTyping(DefaultTyping dti) { |
| return enableDefaultTyping(dti, JsonTypeInfo.As.WRAPPER_ARRAY); |
| } |
| |
| public ObjectMapper enableDefaultTyping(DefaultTyping dti, JsonTypeInfo.As includeAs) |
| { |
| JsonTypeResolverBuilder<?> typer = new DefaultTypeResolverBuilder(dti); |
| // we'll always use full class name, when using defaulting |
| typer = typer.init(JsonTypeInfo.Id.CLASS); |
| typer = typer.inclusion(includeAs); |
| return setDefaltTyping(typer); |
| } |
| |
| public ObjectMapper disableDefaultTyping() { |
| return setDefaltTyping(null); |
| } |
| |
| public ObjectMapper setDefaltTyping(JsonTypeResolverBuilder<?> typer) { |
| _defaultTyper = typer; |
| return this; |
| } |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Public API (from ObjectCodec): deserialization |
| // (mapping from Json to Java types); |
| // main methods |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Method to deserialize JSON content into a non-container |
| * type (it can be an array type, however): typically a bean, array |
| * or a wrapper type (like {@link java.lang.Boolean}). |
| *<p> |
| * Note: this method should NOT be used if the result type is a |
| * container ({@link java.util.Collection} or {@link java.util.Map}. |
| * The reason is that due to type erasure, key and value types |
| * can not be introspected when using this method. |
| */ |
| @Override |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(JsonParser jp, Class<T> valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readValue(copyDeserializationConfig(), jp, TypeFactory.type(valueType)); |
| } |
| |
| /** |
| * Method to deserialize Json content into a non-container |
| * type (it can be an array type, however): typically a bean, array |
| * or a wrapper type (like {@link java.lang.Boolean}). |
| *<p> |
| * Note: this method should NOT be used if the result type is a |
| * container ({@link java.util.Collection} or {@link java.util.Map}. |
| * The reason is that due to type erasure, key and value types |
| * can not be introspected when using this method. |
| * @since 1.1 |
| * |
| * @param cfg Specific deserialization configuration to use for |
| * this operation. Note that not all config settings can |
| * be changed on per-operation basis: some changeds only take effect |
| * before calling the operation for the first time (for the mapper |
| * instance) |
| */ |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(JsonParser jp, Class<T> valueType, |
| DeserializationConfig cfg) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readValue(cfg, jp, TypeFactory.type(valueType)); |
| } |
| |
| /** |
| * Method to deserialize Json content into a Java type, reference |
| * to which is passed as argument. Type is passed using so-called |
| * "super type token" (see ) |
| * and specifically needs to be used if the root type is a |
| * parameterized (generic) container type. |
| */ |
| @Override |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(JsonParser jp, TypeReference<?> valueTypeRef) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readValue(copyDeserializationConfig(), jp, TypeFactory.type(valueTypeRef)); |
| } |
| |
| /** |
| * Method to deserialize Json content into a Java type, reference |
| * to which is passed as argument. Type is passed using so-called |
| * "super type token" (see ) |
| * and specifically needs to be used if the root type is a |
| * parameterized (generic) container type. |
| * |
| * @param cfg Specific deserialization configuration to use for |
| * this operation. Note that not all config settings can |
| * be changed on per-operation basis: some changeds only take effect |
| * before calling the operation for the first time (for the mapper |
| * instance) |
| * |
| * @since 1.1 |
| */ |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(JsonParser jp, TypeReference<?> valueTypeRef, |
| DeserializationConfig cfg) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readValue(cfg, jp, TypeFactory.type(valueTypeRef)); |
| } |
| |
| /** |
| * Method to deserialize Json content into a Java type, reference |
| * to which is passed as argument. Type is passed using |
| * Jackson specific type; instance of which can be constructed using |
| * {@link TypeFactory}. |
| */ |
| @Override |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(JsonParser jp, JavaType valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readValue(copyDeserializationConfig(), jp, valueType); |
| } |
| |
| /** |
| * Method to deserialize Json content into a Java type, reference |
| * to which is passed as argument. Type is passed using |
| * Jackson specific type; instance of which can be constructed using |
| * {@link TypeFactory}. |
| * |
| * @param cfg Specific deserialization configuration to use for |
| * this operation. Note that not all config settings can |
| * be changed on per-operation basis: some changeds only take effect |
| * before calling the operation for the first time (for the mapper |
| * instance) |
| * |
| * @since 1.1 |
| */ |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(JsonParser jp, JavaType valueType, |
| DeserializationConfig cfg) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readValue(cfg, jp, valueType); |
| } |
| |
| /** |
| * Method to deserialize JSON content as tree expressed |
| * using set of {@link JsonNode} instances. Returns |
| * root of the resulting tree (where root can consist |
| * of just a single node if the current event is a |
| * value event, not container). |
| */ |
| @Override |
| public JsonNode readTree(JsonParser jp) |
| throws IOException, JsonProcessingException |
| { |
| return readTree(jp, copyDeserializationConfig()); |
| } |
| |
| /** |
| * Method to deserialize JSON content as tree expressed |
| * using set of {@link JsonNode} instances. Returns |
| * root of the resulting tree (where root can consist |
| * of just a single node if the current event is a |
| * value event, not container). |
| * |
| * @param cfg Specific deserialization configuration to use for |
| * this operation. Note that not all config settings can |
| * be changed on per-operation basis: some changeds only take effect |
| * before calling the operation for the first time (for the mapper |
| * instance) |
| * |
| * @since 1.1 |
| */ |
| public JsonNode readTree(JsonParser jp, DeserializationConfig cfg) |
| throws IOException, JsonProcessingException |
| { |
| /* 02-Mar-2009, tatu: One twist; deserialization provider |
| * will map Json null straight into Java null. But what |
| * we want to return is the "null node" instead. |
| */ |
| JsonNode n = (JsonNode) _readValue(cfg, jp, JSON_NODE_TYPE); |
| return (n == null) ? NullNode.instance : n; |
| } |
| |
| /** |
| * Method to deserialize JSON content as tree expressed |
| * using set of {@link JsonNode} instances. |
| * Returns root of the resulting tree (where root can consist |
| * of just a single node if the current event is a |
| * value event, not container). |
| * |
| * @param in Input stream used to read JSON content |
| * for building the JSON tree. |
| * |
| * @since 1.3 |
| */ |
| public JsonNode readTree(InputStream in) |
| throws IOException, JsonProcessingException |
| { |
| JsonNode n = (JsonNode) readValue(in, JSON_NODE_TYPE); |
| return (n == null) ? NullNode.instance : n; |
| } |
| |
| /** |
| * Method to deserialize JSON content as tree expressed |
| * using set of {@link JsonNode} instances. |
| * Returns root of the resulting tree (where root can consist |
| * of just a single node if the current event is a |
| * value event, not container). |
| * |
| * @param r Reader used to read JSON content |
| * for building the JSON tree. |
| * |
| * @since 1.3 |
| */ |
| public JsonNode readTree(Reader r) |
| throws IOException, JsonProcessingException |
| { |
| JsonNode n = (JsonNode) readValue(r, JSON_NODE_TYPE); |
| return (n == null) ? NullNode.instance : n; |
| } |
| |
| /** |
| * Method to deserialize JSON content as tree expressed |
| * using set of {@link JsonNode} instances. |
| * Returns root of the resulting tree (where root can consist |
| * of just a single node if the current event is a |
| * value event, not container). |
| * |
| * @param content JSON content to parse |
| * for building the JSON tree. |
| * |
| * @since 1.3 |
| */ |
| public JsonNode readTree(String content) |
| throws IOException, JsonProcessingException |
| { |
| JsonNode n = (JsonNode) readValue(content, JSON_NODE_TYPE); |
| return (n == null) ? NullNode.instance : n; |
| } |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Public API (from ObjectCodec): serialization |
| // (mapping from Java types to Json) |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Method that can be used to serialize any Java value as |
| * Json output, using provided {@link JsonGenerator}. |
| */ |
| @Override |
| public void writeValue(JsonGenerator jgen, Object value) |
| throws IOException, JsonGenerationException, JsonMappingException |
| { |
| _serializerProvider.serializeValue(copySerializationConfig(), jgen, value, _serializerFactory); |
| jgen.flush(); |
| } |
| |
| /** |
| * Method that can be used to serialize any Java value as |
| * Json output, using provided {@link JsonGenerator}, |
| * configured as per passed configuration object. |
| * |
| * @since 1.1 |
| */ |
| public void writeValue(JsonGenerator jgen, Object value, SerializationConfig config) |
| throws IOException, JsonGenerationException, JsonMappingException |
| { |
| _serializerProvider.serializeValue(config, jgen, value, _serializerFactory); |
| jgen.flush(); |
| } |
| |
| /** |
| * Method to serialize given Json Tree, using generator |
| * provided. |
| */ |
| public void writeTree(JsonGenerator jgen, JsonNode rootNode) |
| throws IOException, JsonProcessingException |
| { |
| _serializerProvider.serializeValue(copySerializationConfig(), jgen, rootNode, _serializerFactory); |
| jgen.flush(); |
| } |
| |
| /** |
| * Method to serialize given Json Tree, using generator |
| * provided. |
| * |
| * @since 1.1 |
| */ |
| public void writeTree(JsonGenerator jgen, JsonNode rootNode, |
| SerializationConfig cfg) |
| throws IOException, JsonProcessingException |
| { |
| _serializerProvider.serializeValue(cfg, jgen, rootNode, _serializerFactory); |
| jgen.flush(); |
| } |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Public API (from ObjectCodec): Tree Model support |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| *<p> |
| * Note: return type is co-variant, as basic ObjectCodec |
| * abstraction can not refer to concrete node types (as it's |
| * part of core package, whereas impls are part of mapper |
| * package) |
| * |
| * @since 1.2 |
| */ |
| public ObjectNode createObjectNode() { |
| return _nodeFactory.objectNode(); |
| } |
| |
| /** |
| *<p> |
| * Note: return type is co-variant, as basic ObjectCodec |
| * abstraction can not refer to concrete node types (as it's |
| * part of core package, whereas impls are part of mapper |
| * package) |
| * |
| * @since 1.2 |
| */ |
| public ArrayNode createArrayNode() { |
| return _nodeFactory.arrayNode(); |
| } |
| |
| /** |
| * @since 1.3 |
| */ |
| public JsonParser treeAsTokens(JsonNode n) |
| { |
| return new TreeTraversingParser(n, this); |
| } |
| |
| /* |
| * @since 1.3 |
| * |
| public JsonGenerator treeFromTokens(JsonNode n) |
| { |
| if (!n.isContainerNode()) { |
| throw new IllegalArgumentException("JsonNode passed in is not a container node (type "+n.getClass().getName()+")"); |
| } |
| return new TreeAppendingGenerator((ContainerNode) n, this); |
| } |
| */ |
| |
| public <T> T treeToValue(JsonNode n, Class<T> valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| JsonParser jp = treeAsTokens(n); |
| return readValue(jp, valueType); |
| } |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Extended Public API, accessors |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Method that can be called to check whether mapper thinks |
| * it could serialize an instance of given Class. |
| * Check is done |
| * by checking whether a serializer can be found for the type. |
| * |
| * @return True if mapper can find a serializer for instances of |
| * given class (potentially serializable), false otherwise (not |
| * serializable) |
| */ |
| public boolean canSerialize(Class<?> type) |
| { |
| return _serializerProvider.hasSerializerFor(_serializationConfig, type, _serializerFactory); |
| } |
| |
| /** |
| * Method that can be called to check whether mapper thinks |
| * it could deserialize an Object of given type. |
| * Check is done |
| * by checking whether a deserializer can be found for the type. |
| * |
| * @return True if mapper can find a serializer for instances of |
| * given class (potentially serializable), false otherwise (not |
| * serializable) |
| */ |
| public boolean canDeserialize(JavaType type) |
| { |
| return _deserializerProvider.hasValueDeserializerFor(_deserializationConfig, type); |
| } |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Extended Public API, deserialization, |
| // convenience methods |
| //////////////////////////////////////////////////// |
| */ |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(File src, Class<T> valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src), TypeFactory.type(valueType)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(File src, TypeReference valueTypeRef) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src), TypeFactory.type(valueTypeRef)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(File src, JavaType valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src), valueType); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(URL src, Class<T> valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src), TypeFactory.type(valueType)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(URL src, TypeReference valueTypeRef) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src), TypeFactory.type(valueTypeRef)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(URL src, JavaType valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src), valueType); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(String content, Class<T> valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(content), TypeFactory.type(valueType)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(String content, TypeReference valueTypeRef) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(content), TypeFactory.type(valueTypeRef)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(String content, JavaType valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(content), valueType); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(Reader src, Class<T> valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src), TypeFactory.type(valueType)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(Reader src, TypeReference valueTypeRef) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src), TypeFactory.type(valueTypeRef)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(Reader src, JavaType valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src), valueType); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(InputStream src, Class<T> valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src), TypeFactory.type(valueType)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(InputStream src, TypeReference valueTypeRef) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src), TypeFactory.type(valueTypeRef)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(InputStream src, JavaType valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src), valueType); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(byte[] src, int offset, int len, |
| Class<T> valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src, offset, len), TypeFactory.type(valueType)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(byte[] src, int offset, int len, |
| TypeReference valueTypeRef) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src, offset, len), TypeFactory.type(valueTypeRef)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T readValue(byte[] src, int offset, int len, |
| JavaType valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| return (T) _readMapAndClose(_jsonFactory.createJsonParser(src, offset, len), valueType); |
| } |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Extended Public API: serialization |
| // (mapping from Java types to Json) |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Method that can be used to serialize any Java value as |
| * Json output, written to File provided. |
| */ |
| public void writeValue(File resultFile, Object value) |
| throws IOException, JsonGenerationException, JsonMappingException |
| { |
| _configAndWriteValue(_jsonFactory.createJsonGenerator(resultFile, JsonEncoding.UTF8), value); |
| } |
| |
| /** |
| * Method that can be used to serialize any Java value as |
| * Json output, using output stream provided (using encoding |
| * {@link JsonEncoding#UTF8}). |
| *<p> |
| * Note: method does not close the underlying stream explicitly |
| * here; however, {@link JsonFactory} this mapper uses may choose |
| * to close the stream depending on its settings (by default, |
| * it will try to close it when {@link JsonGenerator} we construct |
| * is closed). |
| */ |
| public void writeValue(OutputStream out, Object value) |
| throws IOException, JsonGenerationException, JsonMappingException |
| { |
| _configAndWriteValue(_jsonFactory.createJsonGenerator(out, JsonEncoding.UTF8), value); |
| } |
| |
| /** |
| * Method that can be used to serialize any Java value as |
| * Json output, using Writer provided. |
| *<p> |
| * Note: method does not close the underlying stream explicitly |
| * here; however, {@link JsonFactory} this mapper uses may choose |
| * to close the stream depending on its settings (by default, |
| * it will try to close it when {@link JsonGenerator} we construct |
| * is closed). |
| */ |
| public void writeValue(Writer w, Object value) |
| throws IOException, JsonGenerationException, JsonMappingException |
| { |
| _configAndWriteValue(_jsonFactory.createJsonGenerator(w), value); |
| } |
| |
| /** |
| * Method that can be used to serialize any Java value as |
| * a String. Functionally equivalent to calling |
| * {@link #writeValue(Writer,Object)} with {@link java.io.StringWriter} |
| * and constructing String, but more efficient. |
| * |
| * @since 1.3 |
| */ |
| public String writeValueAsString(Object value) |
| throws IOException, JsonGenerationException, JsonMappingException |
| { |
| // alas, we have to pull the recycler directly here... |
| SegmentedStringWriter sw = new SegmentedStringWriter(_jsonFactory._getBufferRecycler()); |
| _configAndWriteValue(_jsonFactory.createJsonGenerator(sw), value); |
| return sw.getAndClear(); |
| } |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Extended Public API: serialization using Json Views |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Method for serializing given object using specified view. |
| * Note that this method is essentially just a shortcut: view to use is |
| * by {@link SerializationConfig} and so this method just assigns |
| * given view to a copy of default configuration of this |
| * mapper. So to use other kinds of destinations, just call |
| * {@link #copySerializationConfig}, call |
| * {@link SerializationConfig#setSerializationView} method on it, |
| * and pass that configuration to other methods. |
| * |
| * @param jgen Generator to use for writing JSON content |
| * @param value Value to serialize |
| * @param viewClass (optional) Identifier for View to use. If null, |
| * equivalent to passing <code>Object.class</code>; both of which |
| * mean "default view" (all properties always included) |
| */ |
| public void writeValueUsingView(JsonGenerator jgen, Object value, Class<?> viewClass) |
| throws IOException, JsonGenerationException, JsonMappingException |
| { |
| _configAndWriteValue(jgen, value, viewClass); |
| } |
| |
| /** |
| * Method for serializing given object using specified view. |
| * As with {@link #writeValueUsingView(JsonGenerator,Object,Class)}, |
| * this is a short-cut method. |
| * |
| * @param w Writer used for writing JSON content |
| * @param value Value to serialize |
| * @param viewClass (optional) Identifier for View to use. If null, |
| * equivalent to passing <code>Object.class</code>; both of which |
| * mean "default view" (all properties always included) |
| */ |
| public void writeValueUsingView(Writer w, Object value, Class<?> viewClass) |
| throws IOException, JsonGenerationException, JsonMappingException |
| { |
| _configAndWriteValue(_jsonFactory.createJsonGenerator(w), value, viewClass); |
| } |
| |
| /** |
| * Method for serializing given object using specified view. |
| * As with {@link #writeValueUsingView(JsonGenerator,Object,Class)}, |
| * this is a short-cut method. |
| * |
| * @param out Output stream used for writing JSON content |
| * @param value Value to serialize |
| * @param viewClass (optional) Identifier for View to use. If null, |
| * equivalent to passing <code>Object.class</code>; both of which |
| * mean "default view" (all properties always included) |
| */ |
| public void writeValueUsingView(OutputStream out, Object value, Class<?> viewClass) |
| throws IOException, JsonGenerationException, JsonMappingException |
| { |
| _configAndWriteValue(_jsonFactory.createJsonGenerator(out, JsonEncoding.UTF8), value, viewClass); |
| } |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Extended Public API: convenience type conversion |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Convenience method for doing two-step conversion from given value, into |
| * instance of given value type. This is functionality equivalent to first |
| * serializing given value into JSON, then binding JSON data into value |
| * of given type, but may be executed without fully serializing into |
| * JSON. Same converters (serializers, deserializers) will be used as for |
| * data binding, meaning same object mapper configuration works. |
| * |
| * @throws IllegalArgumentException If conversion fails due to incompatible type; |
| * if so, root cause will contain underlying checked exception data binding |
| * functionality threw |
| */ |
| @SuppressWarnings("unchecked") |
| public <T> T convertValue(Object fromValue, Class<T> toValueType) |
| throws IllegalArgumentException |
| { |
| return (T) _convert(fromValue, TypeFactory.type(toValueType)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T convertValue(Object fromValue, TypeReference toValueTypeRef) |
| throws IllegalArgumentException |
| { |
| return (T) _convert(fromValue, TypeFactory.type(toValueTypeRef)); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T convertValue(Object fromValue, JavaType toValueType) |
| throws IllegalArgumentException |
| { |
| return (T) _convert(fromValue, toValueType); |
| } |
| |
| protected Object _convert(Object fromValue, JavaType toValueType) |
| throws IllegalArgumentException |
| { |
| // sanity check for null first: |
| if (fromValue == null) return null; |
| /* Then use TokenBuffer, which is a JsonGenerator: |
| * (see [JACKSON-175]) |
| */ |
| TokenBuffer buf = new TokenBuffer(this); |
| try { |
| writeValue(buf, fromValue); |
| // and provide as with a JsonParser for contents as well! |
| JsonParser jp = buf.asParser(); |
| Object result = readValue(jp, toValueType); |
| jp.close(); |
| return result; |
| } catch (IOException e) { // should not occur, no real i/o... |
| throw new IllegalArgumentException(e.getMessage(), e); |
| } |
| } |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Extended Public API: JSON Schema generation |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Generate <a href="http://json-schema.org/">Json-schema</a> |
| * instance for specified class. |
| * |
| * @param t The class to generate schema for |
| * @return Constructed JSON schema. |
| */ |
| public JsonSchema generateJsonSchema(Class<?> t) |
| throws JsonMappingException |
| { |
| return generateJsonSchema(t, copySerializationConfig()); |
| } |
| |
| /** |
| * Generate <a href="http://json-schema.org/">Json-schema</a> |
| * instance for specified class, using specific |
| * serialization configuration |
| * |
| * @param t The class to generate schema for |
| * @return Constructed JSON schema. |
| */ |
| public JsonSchema generateJsonSchema(Class<?> t, SerializationConfig cfg) |
| throws JsonMappingException |
| { |
| return _serializerProvider.generateJsonSchema(t, cfg, _serializerFactory); |
| } |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Internal methods, overridable |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Method called to configure the generator as necessary and then |
| * call write functionality |
| */ |
| protected final void _configAndWriteValue(JsonGenerator jgen, Object value) |
| throws IOException, JsonGenerationException, JsonMappingException |
| { |
| SerializationConfig cfg = copySerializationConfig(); |
| // [JACKSON-96]: allow enabling pretty printing for ObjectMapper directly |
| if (cfg.isEnabled(SerializationConfig.Feature.INDENT_OUTPUT)) { |
| jgen.useDefaultPrettyPrinter(); |
| } |
| boolean closed = false; |
| try { |
| _serializerProvider.serializeValue(cfg, jgen, value, _serializerFactory); |
| closed = true; |
| jgen.close(); |
| } finally { |
| /* won't try to close twice; also, must catch exception (so it |
| * will not mask exception that is pending) |
| */ |
| if (!closed) { |
| try { |
| jgen.close(); |
| } catch (IOException ioe) { } |
| } |
| } |
| } |
| |
| protected final void _configAndWriteValue(JsonGenerator jgen, Object value, Class<?> viewClass) |
| throws IOException, JsonGenerationException, JsonMappingException |
| { |
| SerializationConfig cfg = copySerializationConfig(); |
| if (cfg.isEnabled(SerializationConfig.Feature.INDENT_OUTPUT)) { |
| jgen.useDefaultPrettyPrinter(); |
| } |
| cfg.setSerializationView(viewClass); |
| boolean closed = false; |
| try { |
| _serializerProvider.serializeValue(cfg, jgen, value, _serializerFactory); |
| closed = true; |
| jgen.close(); |
| } finally { |
| if (!closed) { |
| try { |
| jgen.close(); |
| } catch (IOException ioe) { } |
| } |
| } |
| } |
| |
| /** |
| * Actual implementation of value reading+binding operation. |
| */ |
| protected Object _readValue(DeserializationConfig cfg, JsonParser jp, JavaType valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| /* First: may need to read the next token, to initialize |
| * state (either before first read from parser, or after |
| * previous token has been cleared) |
| */ |
| Object result; |
| JsonToken t = _initForReading(jp); |
| if (t == JsonToken.VALUE_NULL |
| || t == JsonToken.END_ARRAY |
| || t == JsonToken.END_OBJECT) { |
| result = null; |
| } else { // pointing to event other than null |
| DeserializationContext ctxt = _createDeserializationContext(jp, cfg); |
| // ok, let's get the value |
| result = _findRootDeserializer(cfg, valueType).deserialize(jp, ctxt); |
| } |
| // Need to consume the token too |
| jp.clearCurrentToken(); |
| return result; |
| } |
| |
| protected Object _readMapAndClose(JsonParser jp, JavaType valueType) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| try { |
| Object result; |
| JsonToken t = _initForReading(jp); |
| if (t == JsonToken.VALUE_NULL |
| || t == JsonToken.END_ARRAY |
| || t == JsonToken.END_OBJECT) { |
| result = null; |
| } else { |
| DeserializationConfig cfg = copyDeserializationConfig(); |
| DeserializationContext ctxt = _createDeserializationContext(jp, cfg); |
| result = _findRootDeserializer(cfg, valueType).deserialize(jp, ctxt); |
| } |
| // Need to consume the token too |
| jp.clearCurrentToken(); |
| return result; |
| } finally { |
| try { |
| jp.close(); |
| } catch (IOException ioe) { } |
| } |
| } |
| |
| /** |
| * Method called to ensure that given parser is ready for reading |
| * content for data binding. |
| * |
| * @return First token to be used for data binding after this call: |
| * can never be null as exception will be thrown if parser can not |
| * provide more tokens. |
| * |
| * @throws IOException if the underlying input source has problems during |
| * parsing |
| * @throws JsonParseException if parser has problems parsing content |
| * @throws JsonMappingException if the parser does not have any more |
| * content to map (note: Json "null" value is considered content; |
| * enf-of-stream not) |
| */ |
| protected JsonToken _initForReading(JsonParser jp) |
| throws IOException, JsonParseException, JsonMappingException |
| { |
| /* First: must point to a token; if not pointing to one, advance. |
| * This occurs before first read from JsonParser, as well as |
| * after clearing of current token. |
| */ |
| JsonToken t = jp.getCurrentToken(); |
| if (t == null) { |
| // and then we must get something... |
| t = jp.nextToken(); |
| if (t == null) { |
| /* [JACKSON-99] Should throw EOFException, closed thing |
| * semantically |
| */ |
| throw new EOFException("No content to map to Object due to end of input"); |
| } |
| } |
| return t; |
| } |
| |
| /* |
| //////////////////////////////////////////////////// |
| // Internal methods, other |
| //////////////////////////////////////////////////// |
| */ |
| |
| /** |
| * Method called to locate deserializer for the passed root-level value. |
| */ |
| protected JsonDeserializer<Object> _findRootDeserializer(DeserializationConfig cfg, JavaType valueType) |
| throws JsonMappingException |
| { |
| // First: have we already seen it? |
| JsonDeserializer<Object> deser = _rootDeserializers.get(valueType); |
| if (deser != null) { |
| return deser; |
| } |
| |
| // Nope: need to ask provider to resolve it |
| deser = _deserializerProvider.findTypedValueDeserializer(cfg, valueType); |
| if (deser == null) { // can this happen? |
| throw new JsonMappingException("Can not find a deserializer for type "+valueType); |
| } |
| _rootDeserializers.put(valueType, deser); |
| return deser; |
| } |
| |
| protected DeserializationContext _createDeserializationContext(JsonParser jp, DeserializationConfig cfg) |
| { |
| // 04-Jan-2010, tatu: we do actually need the provider too... (for polymorphic deser) |
| return new StdDeserializationContext(cfg, jp, _deserializerProvider); |
| } |
| } |
