Learn more. Asked 7 years, 9 months ago. Active 7 years, 9 months ago. Viewed times. Improve this question. Add a comment. Active Oldest Votes. Improve this answer. Rizwan Ahmed Rizwan Ahmed 1 1 silver badge 9 9 bronze badges. Thanks I ended up using Jackson because could not figure out how to use XStream for this. I was wondering if you know how to ignore a node while parsing using Jackson — greengrassbluesky.
Current Java 9 implementation reports itself as version 9 now. Added method c. IsIgnoredElement String Added c. Deprecated method c. Processing of external entities has been disabled. See FAQ for more information. Path by Aaron Jonson. Minor changes 35 : AnnotationMapper dropped silently constructor arguments for converters if they were equal. Fix: Possible concurrency problem with XomDriver.
XSTR , 3 : Minimize memory footprint by not keeping internal references to instances of immutable types. Drop automatic reference support at deserialization time for immutable types before version 1.
Class, java. String, java. BigDecimal, java. BigInteger, java. File, java. URL, and java. Fix: Implicit collection declaration is erroneously inherited or propagated to hidden field of same name. XStreamConverter annotation supports null values as arguments for converter instantiation. ActivationDataFlavor, because ExternalizableConverter cannot handle a type that violates the Java specification.
XSTR : Synthetic fields with references to outer class use compiler dependent names. Fix example code in description of security framework. Clean-up usage of exceptions. Added constructor c. Added abstract c. ErrorWritingException as common base for c. ConversionException and c.
XomDriver Builder , c. XomDriver Builder, NameCoder and c. Methods never called, left-over from old refactoring. Major changes Support for serializable lambda expressions and handling of non-serializable ones. Minor changes Detect Java 9 runtime. XSTR : Deserialization of referenced lambda expressions fail. Fix: DateConverter ignores provided locale.
Fix: WeakCache. XSTR : Set scope of org. LambdaConverter and c. Declare c. StackTraceElementFactory, it is an internal helper class. SerializationMethodInvoker, it is an internal helper class. AttributeNameIterator, it is an internal helper class. XStream11XmlFriendlyMapper has been deprecated long ago.
Major changes Add security framework to limit handled types while unmarshalling. EventHandler no longer handled automatically because of severe security vulnerability. Add constructor to ReflectionConverter taking an additional type to create an instance that is dedicated to a specific type only. The ConverterLookup used by default cannot be casted to a ConverterRegistry anymore. API changes Added package c. SecurityMapper handling the new type permissions.
XStream to setup security at unmarshalling time. Sun14ReflectionProvider in favor of new c. XStream converters try now to ensure already in the canConvert methods that they can handle the requested type in practice and not only theoretically.
Additionally the implementations even better take care, that the initialization of a converter will not break the setup of XStream itself. Following modifications have been done for these topics: ReflectionConverter, SerializationConverter and LookAndFieldConverter will check if they can access the fields by reflection for a requested type.
SerializationConverter and ExternalizableConverter will check if they can create an instance of a derived OutputObjectStream first. BeanProvider does no longer use reflection to locate default constructor.
AbstractAttributedCharacterIteratorAttributeConverter and therefore TextAttributeConverter will check first if it can access the possible constants of the type by reflection. New NamedArrayConverter to define names of inner elements. NamedArrayConverter for free element names in arrays. Added constructors to c. Deprecated constructors of c. Added method canAccess to c. Deprecated unused member c. Deprecated unused method c. Major changes XSTR : Use a referencing implementation for the ClassLoader to support environments where no new ClassLoader can be instantiated due to security restrictions.
Optimized XML structure for java. Minor changes Fix missing manifest information. XSTR : XStream will now detect a working enhanced mode dynamically instead using lists of known vendors. It will currently fail on a runtime based on GNU Classpath at least up to version 0. XSTR : Support replacement of default converter in any case. XSTR : processAnnotation performance improvement in concurrent situation. New constructors for CollectionConverter and MapConverter to allow registration for an individual type.
XSTR : Cache class name lookup failures. LongConverter supports now positive hex and octal numbers over Long. XSTR : Do not write 'defined-in' attribute if not needed. JettisonMappedXmlDriver provides better support to overwrite its create methods. XSTR : Implicit elements that match multiple defined implicit collections will be assigned to the map with the nearest matching element type.
While it is not possible to enable this in general, new constructors have been added to these converters and an example in the acceptance tests AliasTest. Implicit type argument can be omitted when registering converters with XStreamConverter annotation. NamedCollectionConverter for free element names in collections.
NamedMapConverter for free element names in maps. JVM as returning the implementations of javax. XMLInputFactory resp. Added constructors taking an additional Class argument for c.
CollectionConverter and c. XStream c. DynamicProxyConverter c. JavaClassConverter c. JavaFieldConverter c. JavaMethodConverter c. ExternalizableConverter c. SerializableConverter c. AnnotationMapper c. JVM as replacement for the deprecated non-static methods. JVM and all non-static methods. Added method useImplicitType to c. XSTR : Added c.
Deprecated constructor c. RegexPatternConverter Converter in favor of c. Deprecated default constructor of c. FontConverter in favor of c. FontConverter Mapper. ThrowableConverter Converter in favor of c. ThrowableConverter ConverterLookup. Deprecated class c. SelfStreamingInstanceChecker and moved original implementation into c.
Deprecated interface c. DateConverter supports now localized formats. XSTR : Unnecessary synchronization accessing the field cache decreases performance. API changes Deprecated method c. Major changes Support java. ConcurrentHashMap with the MapConverter. Minor changes JVM. Subject fails. XSTR : Inheritance of implicit collections, arrays or maps is dependent on declaration sequence.
Inherited implicit collections, arrays or maps can be overwritten with own definition in subtype. JavaBeanConverter supports now instantiation for a specific type and can therefore be used in XStreamConverter annotation.
SerializableConverter is broken if the serialized type is the default implementation. Method marshalUnserializableParent of SerializableConverter is protected now to skip the default mechanism in a derived converter that uses the default constructor to create the original type as an alternative for XSTR FieldDictionary may call sort of FieldKeySorter implementation with wrong type as key. Sometimes DependencyInjectionFactory tries to instantiate objects with mismatching constructor arguments.
Major changes XStream libraries can be used now directly in Android, therefore support of Java 1. Anyone who needs a version for Java 1. All XStream readers implement the new interface by Nikita Levyankov.
XSTR : Collections. CircularReference is not a ConversionException. XSTR : Recreate binary compatibility with 1. Add length limit for cached strings in StringConverter, 38 characters by default. Add BinaryStreamDriver. Dom4JXmlWriter fails to flush the underlying writer. Known control characters are not encoded with JsonWriter as proposed at json. Detect duplicate property processing in JavaBeanConverter and throw DuplicatePropertyException instead of clobbering silently.
DependencyInjectionFactory failed to create instance when a matching constructor was found, but a default constructor was also present. API changes Added interface c. ExtendedHierarchicalStreamReader extending c. Let us explore a few customization options and more complicated scenarios that can be fulfilled with the framework. Let us discuss a few options. This may not be desirable when producing XML for outside systems. To do that, we will use the XStreamAlias annotation.
This alias will be used in the XML tag when processing the class instances. For example, to configure the BankAccount class, we will add the annotation as follows:. The second step is to tell XStream that our class has special configurations that should be loaded. This is done by calling the XStream. Again, this is a costly operation and should be done only once on application startup. Otherwise your application performance will not be optimal.
Serializing and deserializing lists is an important operation when communicating with outside systems. For example, when obtaining or sending a list of results.
Therefore, let us move to our next example. The good news is that the solution is easy. The bad news is that it is a little tedious. In the previous chapter, we've seen the following configurations in code. The following code snippet illustrates the use of annotations to do the same work in a much easier way. In order to instruct the XStream framework to process annotation, you need to add the following command before serializing xml. XStream converters are the key components of the XStream library, which are responsible to convert an object to XML and vice versa.
XStream provides numerous converters for common types such as primitives, String, File, Collections, arrays, and Dates. Let us use a SingleValueConvertor whose purpose is to convert an object into a single string.
We will use SingleValueConvertor to write an object as attribute string. XStream provides alternative implementations of java. ObjectInputStream and java. This is particularly useful when large sets of objects are to be processed, keeping one object in memory at a time.
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