It has been a very lean and easy option of .Net to able serialize/deserialize any serializable object instance.
The Serialize method is used to serialize an object to XML. This class has been built to serialize any public and published property or Field. This was done to mimic the behavior found in the.NET Xml Serialization with the goal of having a set of objects that can serialize in.NET using Delphi Prism and Win32 using Delphi 2010. Delphi Serialize Class To Xml In computer science, in the context of data storage, serialization (or serialisation) is the process. JSON is a lighter plain-text alternative to XML which is also commonly used for client-server communication in. Implementing the interface marks the class as 'okay to serialize', and Java then handles serialization internally. What would be best way in Delphi (not.Net) to serialize objects? What I'd like to do is to be able to store my objects to a file and reload them back. No database is involved. Is there any helpful libraries to make things easier? Which ever file format is suitable, human readable format would be nice tough, possible XML or YAML. Delphi Serialize Object To Xml. XML Serialization with XML Web Services. XML serialization is the underlying transport mechanism used in the XML Web services architecture, performed by the Xml. Serializer class. Create a serialized representation of an array, a plain object, or a jQuery object suitable for use in a URL query string or Ajax. #Delphi-Serialization Delphi-Serialization provides functionality for serializing and deserializing Objects to (currently only) XML. Roadmap (rough).
Only closest option in Delphi is to stream the component using WriteComponent/WriteComponentRes of TStream/TWriter (used for Form storage as DFM, for example). It can be then read back using appropriate counterpart ReadComponent/ReadComponentRes.
Depend on your situation, simply calling .Assign method would work if you are coping data from one instance to another. But it only works between inherited classed which know about each other.
Can we find there something which will allow to pass objects states in more readable format?
There is a very powerful infrastructure available to do full serialization without knowing underlying class structure – RTTI (Run-time Type Information).
All functions we would be looking at are defined in TypInfo.pas unit.
First thing first. To be able to work within RTTI, you need to operate on the object which has publishedand public properties.
C# Xml Serialize To File
A function will return number and reference to the list (array) of properties published (public and published) by the class (VMT information). List will also include published methods. Simply walking through it will give you an access to property/method information.
In our example we are not interested in the published methods, so lets filter it out:
What other Kind of information is present in the list? Bellow is full definition of the type
Now you are ready to get or set the value of the property:
And now you are ready to serialize your object, store it, load definition and deserialize an object back. And it could be not necessarily the same object.
You would have to loop through the properties, read the values, and store it as an XML for later use.
I am not going to go through all specific details in this post, instead, you can find a full code for XML Class serializer here.
It has been a very lean and easy option of .Net to able serialize/deserialize any serializable object instance.
Only closest option in Delphi is to stream the component using WriteComponent/WriteComponentRes of TStream/TWriter (used for Form storage as DFM, for example). It can be then read back using appropriate counterpart ReadComponent/ReadComponentRes.
Depend on your situation, simply calling .Assign method would work if you are coping data from one instance to another. But it only works between inherited classed which know about each other.
Can we find there something which will allow to pass objects states in more readable format?
There is a very powerful infrastructure available to do full serialization without knowing underlying class structure – RTTI (Run-time Type Information).
Serialize Object To Xml
All functions we would be looking at are defined in TypInfo.pas unit.
First thing first. To be able to work within RTTI, you need to operate on the object which has publishedand public properties.
Delphi Serialize Object To Xml
A function will return number and reference to the list (array) of properties published (public and published) by the class (VMT information). List will also include published methods. Simply walking through it will give you an access to property/method information.
In our example we are not interested in the published methods, so lets filter it out:
What other Kind of information is present in the list? Bellow is full definition of the type
Now you are ready to get or set the value of the property:
And now you are ready to serialize your object, store it, load definition and deserialize an object back. And it could be not necessarily the same object.
You would have to loop through the properties, read the values, and store it as an XML for later use.
C# Serialize To Xml
I am not going to go through all specific details in this post, instead, you can find a full code for XML Class serializer here.