rpdl.reader source code

1 /**
2  * Interface for reading files and convert it to the `rpdl.tree.RpdlTree`
3  *
4  * Copyright: © 2017 Andrey Kabylin
5  * License: Subject to the terms of the MIT license, as written in the included LICENSE.txt file.
6  */
7 
8 module rpdl.reader;
9 
10 import std.file;
11 import std.stdio;
12 import std.conv;
13 
14 import rpdl.node;
15 import rpdl.value;
16 import rpdl.exception;
17 
18 /// Declare interface for readers and tell them - how to read each type of node to file.
19 interface IReader {
20     ///
21     void readObjects();
22 
23     /// Read `rpdl.node.ObjectNode` and insert it to `parent`
24     void readObject(Node parent);
25 
26     /// Read `rpdl.node.Parameter` and insert it to `parent`
27     void readParameter(Node parent);
28 
29     /// Read `rpdl.value.Value` and insert it to `parent`
30     void readValue(Node parent);
31 
32     /// Read `rpdl.value.NumberValue` and insert it to `parent`
33     void readNumberValue(Node parent);
34 
35     /// Read `rpdl.value.BooleanValue` and insert it to `parent`
36     void readBooleanValue(Node parent);
37 
38     /// Read `rpdl.value.StringValue` and insert it to `parent`
39     void readStringValue(Node parent);
40 
41     /// Read `rpdl.value.IdentifierValue` and insert it to `parent`
42     void readIdentifierValue(Node parent);
43 
44     /// Read `rpdl.value.ArrayValue` and insert it to `parent`
45     void readArrayValue(Node parent);
46 }
47 
48 abstract class Reader : IReader {
49     this(Node root) {
50         this.root = root;
51     }
52 
53     void read(in string fileName) {
54         this.file = File(fileName, "r");
55         readObjects();
56     }
57 
58 protected:
59     Node root;
60     File file;
61 
62     override void readObjects() {}
63     override void readObject(Node parent) {}
64     override void readParameter(Node parent) {}
65     override void readValue(Node parent) {}
66     override void readNumberValue(Node parent) {}
67     override void readBooleanValue(Node parent) {}
68     override void readStringValue(Node parent) {}
69     override void readIdentifierValue(Node parent) {}
70     override void readArrayValue(Node parent) {}
71 }