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Object serialization: Difference between revisions
Added zkl
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close $f
$obj printGreetings</lang>
=={{header|zkl}}==
zkl can serialize a "root class" (usually a file but any static (ie parentless) class) to bit bucket (such as File). This is done via reflection. The state of the class(es) are not stored so no image write/read. In the "normal" course of events, this isn't used, programs are compiled on the fly and run. However, there is extensive support to pre-compile and package files into applications or just pre-compile for faster load times (or to create an image that can be compiled into C code (which is done to package the compiler with the VM). When the compiler writes a class or app to a file, the preferred extension is ".zsc", which is what the Import method looks for. But no matter, we have ways ...
<lang zkl>class [static] ARootClass{ // A top level class, no instances
class A{ self.println(" constructor"); } // a regular class
class B(A){ // ditto
var x;
fcn init(x=123){ self.x=x }
fcn toString{ "x is "+x }
}
}
ARootClass.B(456).println(); // create an instance
// prints:
Class(A) constructor
x is 456
f:=File("object.dat","wb");
Compiler.Asm.writeRootClass(ARootClass,f); // serialize to file
f.close();
f:=File("object.dat","rb");
rc:=Compiler.Asm.readRootClass(f); // read and re-create
// prints (readRootClass calls all constructors by default):
Class(A) constructor
f.close();
rc.B().println(); // create a new instance of B
// prints:
x is 123</lang>
{{omit from|AWK}}
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