Merged converters and factory classes from POC_CONVERTERS_FACTORY to trunk
This commit is contained in:
paul.cohen
81
library/gobo/converters/json_ds_hash_table_converter.e
Normal file
81
library/gobo/converters/json_ds_hash_table_converter.e
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@@ -0,0 +1,81 @@
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indexing
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description: "A JSON converter for DS_HASH_TABLE [ANY, HASHABLE]"
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author: "Paul Cohen"
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date: "$Date: $"
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revision: "$Revision: $"
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file: "$HeadURL: $"
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class JSON_DS_HASH_TABLE_CONVERTER
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inherit
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JSON_CONVERTER
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create
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make
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feature {NONE} -- Initialization
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make is
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do
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create object.make (0)
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end
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feature -- Access
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value: JSON_OBJECT
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object: DS_HASH_TABLE [ANY, HASHABLE]
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feature -- Conversion
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from_json (j: like value): like object is
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local
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keys: ARRAY [JSON_STRING]
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i: INTEGER
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h: HASHABLE
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a: ANY
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do
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keys := j.current_keys
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create Result.make (keys.count)
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from
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i := 1
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until
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i > keys.count
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loop
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h ?= json.object (keys [i], void)
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check h /= Void end
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a := json.object (j.item (keys [i]), Void)
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Result.put (a, h)
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i := i + 1
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end
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end
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to_json (o: like object): like value is
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local
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c: DS_HASH_TABLE_CURSOR [ANY, HASHABLE]
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js: JSON_STRING
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jv: JSON_VALUE
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failed: BOOLEAN
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do
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create Result.make
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from
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c := o.new_cursor
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c.start
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until
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c.after
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loop
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create js.make_json (c.key.out)
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jv := json.value (c.item)
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if jv /= Void then
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Result.put (jv, js)
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else
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failed := True
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end
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c.forth
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end
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if failed then
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Result := Void
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end
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end
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end -- class JSON_DS_HASH_TABLE_CONVERTER
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62
library/gobo/converters/json_ds_linked_list_converter.e
Normal file
62
library/gobo/converters/json_ds_linked_list_converter.e
Normal file
@@ -0,0 +1,62 @@
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indexing
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description: "A JSON converter for DS_LINKED_LIST [ANY]"
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author: "Paul Cohen"
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date: "$Date: $"
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revision: "$Revision: $"
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file: "$HeadURL: $"
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class JSON_DS_LINKED_LIST_CONVERTER
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inherit
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JSON_CONVERTER
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create
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make
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feature {NONE} -- Initialization
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make is
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do
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create object.make
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end
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feature -- Access
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value: JSON_ARRAY
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object: DS_LINKED_LIST [ANY]
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feature -- Conversion
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from_json (j: like value): like object is
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local
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i: INTEGER
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do
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create Result.make
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from
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i := 1
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until
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i > j.count
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loop
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Result.put_last (json.object (j [i], Void))
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i := i + 1
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end
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end
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to_json (o: like object): like value is
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local
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c: DS_LIST_CURSOR [ANY]
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do
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create Result.make_array
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from
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c := o.new_cursor
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c.start
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until
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c.after
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loop
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Result.add (json.value (c.item))
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c.forth
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end
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end
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end -- class JSON_DS_LINKED_LIST_CONVERTER
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32
library/gobo/shared_gobo_ejson.e
Normal file
32
library/gobo/shared_gobo_ejson.e
Normal file
@@ -0,0 +1,32 @@
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indexing
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description: "[
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Shared factory class for creating JSON objects. Maps JSON
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objects to Gobo DS_HASH_TABLEs and JSON arrays to Gobo
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DS_LINKED_LISTs. Use non-conforming inheritance from this
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class to ensure that your classes share the same
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JSON_FACTORY instance.
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]"
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author: "Paul Cohen"
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date: "$Date$"
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revision: "$Revision$"
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file: "$HeadURL: $"
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class SHARED_GOBO_EJSON
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feature
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json: EJSON is
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-- A shared EJSON instance with default converters for
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-- DS_LINKED_LIST [ANY] and DS_HASH_TABLE [ANY, HASHABLE]
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local
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jllc: JSON_DS_LINKED_LIST_CONVERTER
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jhtc: JSON_DS_HASH_TABLE_CONVERTER
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once
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create Result
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create jllc.make
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Result.add_converter (jllc)
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create jhtc.make
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Result.add_converter (jhtc)
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end
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end -- class SHARED_GOBO_EJSON
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41
library/kernel/converters/json_converter.e
Normal file
41
library/kernel/converters/json_converter.e
Normal file
@@ -0,0 +1,41 @@
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indexing
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description: "A JSON converter"
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author: "Paul Cohen"
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date: "$Date: $"
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revision: "$Revision: $"
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file: "$HeadURL: $"
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deferred class JSON_CONVERTER
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inherit
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SHARED_EJSON
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feature -- Access
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value: JSON_VALUE is
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-- JSON value
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deferred
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end
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object: ANY is
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-- Eiffel object
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deferred
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end
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feature -- Conversion
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from_json (j: like value): like object is
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-- Convert from JSON value. Returns Void if unable to convert
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deferred
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end
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to_json (o: like object): like value is
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-- Convert to JSON value
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deferred
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end
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invariant
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has_eiffel_object: object /= Void -- An empty object must be created at creation time!
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end -- class JSON_CONVERTER
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79
library/kernel/converters/json_hash_table_converter.e
Normal file
79
library/kernel/converters/json_hash_table_converter.e
Normal file
@@ -0,0 +1,79 @@
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indexing
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description: "A JSON converter for HASH_TABLE [ANY, HASHABLE]"
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author: "Paul Cohen"
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date: "$Date$"
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revision: "$Revision$"
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file: "$HeadURL: $"
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class JSON_HASH_TABLE_CONVERTER
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inherit
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JSON_CONVERTER
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create
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make
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feature {NONE} -- Initialization
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make is
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do
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create object.make (0)
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end
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feature -- Access
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value: JSON_OBJECT
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object: HASH_TABLE [ANY, HASHABLE]
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feature -- Conversion
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from_json (j: like value): like object is
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local
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keys: ARRAY [JSON_STRING]
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i: INTEGER
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h: HASHABLE
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a: ANY
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do
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keys := j.current_keys
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create Result.make (keys.count)
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from
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i := 1
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until
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i > keys.count
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loop
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h ?= json.object (keys [i], void)
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check h /= Void end
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a := json.object (j.item (keys [i]), Void)
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Result.put (a, h)
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i := i + 1
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end
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end
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to_json (o: like object): like value is
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local
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js: JSON_STRING
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jv: JSON_VALUE
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failed: BOOLEAN
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do
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create Result.make
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from
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o.start
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until
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o.after
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loop
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create js.make_json (o.key_for_iteration.out)
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jv := json.value (o.item_for_iteration)
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if jv /= Void then
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Result.put (jv, js)
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else
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failed := True
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end
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o.forth
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end
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if failed then
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Result := Void
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end
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end
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end -- class JSON_HASH_TABLE_CONVERTER
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61
library/kernel/converters/json_linked_list_converter.e
Normal file
61
library/kernel/converters/json_linked_list_converter.e
Normal file
@@ -0,0 +1,61 @@
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indexing
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description: "A JSON converter for LINKED_LIST [ANY]"
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author: "Paul Cohen"
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date: "$Date$"
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revision: "$Revision$"
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file: "$HeadURL: $"
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class JSON_LINKED_LIST_CONVERTER
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inherit
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JSON_CONVERTER
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create
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make
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feature {NONE} -- Initialization
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||||
|
||||
make is
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||||
do
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create object.make
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||||
end
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feature -- Access
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value: JSON_ARRAY
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object: LINKED_LIST [ANY]
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feature -- Conversion
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from_json (j: like value): like object is
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local
|
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i: INTEGER
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do
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create Result.make
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from
|
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i := 1
|
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until
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i > j.count
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loop
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Result.extend (json.object (j [i], Void))
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i := i + 1
|
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end
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end
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to_json (o: like object): like value is
|
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local
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c: LINKED_LIST_CURSOR [ANY]
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do
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create Result.make_array
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from
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o.start
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until
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||||
o.after
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||||
loop
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||||
Result.add (json.value (o.item))
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o.forth
|
||||
end
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||||
end
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||||
|
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end -- class JSON_LINKED_LIST_CONVERTER
|
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345
library/kernel/ejson.e
Normal file
345
library/kernel/ejson.e
Normal file
@@ -0,0 +1,345 @@
|
||||
indexing
|
||||
description: "Core factory class for creating JSON objects and corresponding Eiffel objects."
|
||||
author: "Paul Cohen"
|
||||
date: "$Date: $"
|
||||
revision: "$Revision: $"
|
||||
file: "$HeadURL: $"
|
||||
|
||||
class EJSON
|
||||
|
||||
inherit
|
||||
{NONE} KL_EXCEPTIONS
|
||||
|
||||
feature -- Access
|
||||
|
||||
value (an_object: ?ANY): JSON_VALUE is
|
||||
-- JSON value from Eiffel object. Raises an "eJSON exception" if
|
||||
-- unable to convert value.
|
||||
local
|
||||
b: BOOLEAN
|
||||
i: INTEGER
|
||||
i8: INTEGER_8
|
||||
i16: INTEGER_16
|
||||
i32: INTEGER_32
|
||||
i64: INTEGER_64
|
||||
n8: NATURAL_8
|
||||
n16: NATURAL_16
|
||||
n32: NATURAL_32
|
||||
n64: NATURAL_64
|
||||
r32: REAL_32
|
||||
r64: REAL_64
|
||||
a: ARRAY [ANY]
|
||||
c: CHARACTER
|
||||
s8: STRING_8
|
||||
ucs: UC_STRING
|
||||
ja: JSON_ARRAY
|
||||
jc: JSON_CONVERTER
|
||||
do
|
||||
-- Try to convert from basic Eiffel types. Note that we check with
|
||||
-- `conforms_to' since the client may have subclassed the base class
|
||||
-- that these basic types are derived from.
|
||||
if an_object = Void then
|
||||
create {JSON_NULL} Result
|
||||
elseif an_object.conforms_to (a_boolean) then
|
||||
b ?= an_object
|
||||
create {JSON_BOOLEAN} Result.make_boolean (b)
|
||||
elseif an_object.conforms_to (an_integer_8) then
|
||||
i8 ?= an_object
|
||||
create {JSON_NUMBER} Result.make_integer (i8)
|
||||
elseif an_object.conforms_to (an_integer_16) then
|
||||
i16 ?= an_object
|
||||
create {JSON_NUMBER} Result.make_integer (i16)
|
||||
elseif an_object.conforms_to (an_integer_32) then
|
||||
i32 ?= an_object
|
||||
create {JSON_NUMBER} Result.make_integer (i32)
|
||||
elseif an_object.conforms_to (an_integer_64) then
|
||||
i64 ?= an_object
|
||||
create {JSON_NUMBER} Result.make_integer (i64)
|
||||
elseif an_object.conforms_to (a_natural_8) then
|
||||
n8 ?= an_object
|
||||
create {JSON_NUMBER} Result.make_natural (n8)
|
||||
elseif an_object.conforms_to (a_natural_16) then
|
||||
n16 ?= an_object
|
||||
create {JSON_NUMBER} Result.make_natural (n16)
|
||||
elseif an_object.conforms_to (a_natural_32) then
|
||||
n32 ?= an_object
|
||||
create {JSON_NUMBER} Result.make_natural (n32)
|
||||
elseif an_object.conforms_to (a_natural_64) then
|
||||
n64 ?= an_object
|
||||
create {JSON_NUMBER} Result.make_natural (n64)
|
||||
elseif an_object.conforms_to (a_real_32) then
|
||||
r32 ?= an_object
|
||||
create {JSON_NUMBER} Result.make_real (r32)
|
||||
elseif an_object.conforms_to (a_real_64) then
|
||||
r64 ?= an_object
|
||||
create {JSON_NUMBER} Result.make_real (r64)
|
||||
elseif an_object.conforms_to (an_array) then
|
||||
a ?= an_object
|
||||
create ja.make_array
|
||||
from
|
||||
i := a.lower
|
||||
until
|
||||
i > a.upper
|
||||
loop
|
||||
ja.add (value (a @ i))
|
||||
i := i + 1
|
||||
end
|
||||
Result := ja
|
||||
elseif an_object.conforms_to (a_character) then
|
||||
c ?= an_object
|
||||
create {JSON_STRING} Result.make_json (c.out)
|
||||
elseif an_object.conforms_to (a_uc_string) then
|
||||
ucs ?= an_object
|
||||
create {JSON_STRING} Result.make_json (ucs.to_utf8)
|
||||
elseif an_object.conforms_to (a_string_8) then
|
||||
s8 ?= an_object
|
||||
create {JSON_STRING} Result.make_json (s8)
|
||||
end
|
||||
|
||||
if Result = Void then
|
||||
-- Now check the converters
|
||||
jc := converter_for (an_object)
|
||||
if jc /= Void then
|
||||
Result := jc.to_json (an_object)
|
||||
else
|
||||
raise (exception_failed_to_convert_to_json (an_object))
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
object (a_value: JSON_VALUE; base_class: ?STRING): ANY is
|
||||
-- Eiffel object from JSON value. If `base_class' /= Void an eiffel
|
||||
-- object based on `base_class' will be returned. Raises an "eJSON
|
||||
-- exception" if unable to convert value.
|
||||
require
|
||||
a_value_not_void: a_value /= Void
|
||||
local
|
||||
jc: JSON_CONVERTER
|
||||
jb: JSON_BOOLEAN
|
||||
jn: JSON_NUMBER
|
||||
js: JSON_STRING
|
||||
ja: JSON_ARRAY
|
||||
jo: JSON_OBJECT
|
||||
i: INTEGER
|
||||
ll: LINKED_LIST [ANY]
|
||||
t: HASH_TABLE [ANY, UC_STRING]
|
||||
keys: ARRAY [JSON_STRING]
|
||||
ucs: UC_STRING
|
||||
do
|
||||
if base_class = Void then
|
||||
if a_value.generator.is_equal ("JSON_NULL") then
|
||||
Result := Void
|
||||
elseif a_value.generator.is_equal ("JSON_BOOLEAN") then
|
||||
jb ?= a_value
|
||||
check jb /= Void end
|
||||
Result := jb.item
|
||||
elseif a_value.generator.is_equal ("JSON_NUMBER") then
|
||||
jn ?= a_value
|
||||
check jn /= Void end
|
||||
if jn.item.is_integer_8 then
|
||||
Result := jn.item.to_integer_8
|
||||
elseif jn.item.is_integer_16 then
|
||||
Result := jn.item.to_integer_16
|
||||
elseif jn.item.is_integer_32 then
|
||||
Result := jn.item.to_integer_32
|
||||
elseif jn.item.is_integer_64 then
|
||||
Result := jn.item.to_integer_64
|
||||
elseif jn.item.is_natural_64 then
|
||||
Result := jn.item.to_natural_64
|
||||
elseif jn.item.is_double then
|
||||
Result := jn.item.to_double
|
||||
end
|
||||
elseif a_value.generator.is_equal ("JSON_STRING") then
|
||||
js ?= a_value
|
||||
check js /= Void end
|
||||
create ucs.make_from_string (js.item)
|
||||
Result := ucs
|
||||
elseif a_value.generator.is_equal ("JSON_ARRAY") then
|
||||
ja ?= a_value
|
||||
check ja /= Void end
|
||||
from
|
||||
create ll.make ()
|
||||
i := 1
|
||||
until
|
||||
i > ja.count
|
||||
loop
|
||||
ll.extend (object (ja [i], Void))
|
||||
i := i + 1
|
||||
end
|
||||
Result := ll
|
||||
elseif a_value.generator.is_equal ("JSON_OBJECT") then
|
||||
jo ?= a_value
|
||||
check jo /= Void end
|
||||
keys := jo.current_keys
|
||||
create t.make (keys.count)
|
||||
from
|
||||
i := keys.lower
|
||||
until
|
||||
i > keys.upper
|
||||
loop
|
||||
ucs ?= object (keys [i], Void)
|
||||
check ucs /= Void end
|
||||
t.put (object (jo.item (keys [i]), Void), ucs)
|
||||
i := i + 1
|
||||
end
|
||||
Result := t
|
||||
end
|
||||
else
|
||||
if converters.has (base_class) then
|
||||
jc := converters @ base_class
|
||||
Result := jc.from_json (a_value)
|
||||
else
|
||||
raise (exception_failed_to_convert_to_eiffel (a_value, base_class))
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
object_from_json (json: STRING; base_class: ?STRING): ANY is
|
||||
-- Eiffel object from JSON representation. If `base_class' /= Void an
|
||||
-- Eiffel object based on `base_class' will be returned. Raises an
|
||||
-- "eJSON exception" if unable to convert value.
|
||||
require
|
||||
json_not_void: json /= Void
|
||||
local
|
||||
jv: JSON_VALUE
|
||||
do
|
||||
json_parser.set_representation (json)
|
||||
jv := json_parser.parse
|
||||
Result := object (jv, base_class)
|
||||
end
|
||||
|
||||
converter_for (an_object: ANY): JSON_CONVERTER is
|
||||
-- Converter for objects. Returns Void if none found.
|
||||
require
|
||||
an_object_not_void: an_object /= Void
|
||||
do
|
||||
if converters.has (an_object.generator) then
|
||||
Result := converters @ an_object.generator
|
||||
end
|
||||
end
|
||||
|
||||
json_reference (s: STRING): JSON_OBJECT is
|
||||
-- A JSON (Dojo style) reference object using `s' as the
|
||||
-- reference value. The caller is responsable for ensuring
|
||||
-- the validity of `s' as a json reference.
|
||||
require
|
||||
s_not_void: s /= Void
|
||||
local
|
||||
js_key, js_value: JSON_STRING
|
||||
do
|
||||
create Result.make
|
||||
create js_key.make_json ("$ref")
|
||||
create js_value.make_json (s)
|
||||
Result.put (js_value, js_key)
|
||||
end
|
||||
|
||||
json_references (l: DS_LIST [STRING]): JSON_ARRAY is
|
||||
-- A JSON array of JSON (Dojo style) reference objects using the
|
||||
-- strings in `l' as reference values. The caller is responsable
|
||||
-- for ensuring the validity of all strings in `l' as json
|
||||
-- references.
|
||||
require
|
||||
l_not_void: l /= Void
|
||||
local
|
||||
c: DS_LIST_CURSOR [STRING]
|
||||
do
|
||||
create Result.make_array
|
||||
from
|
||||
c := l.new_cursor
|
||||
c.start
|
||||
until
|
||||
c.after
|
||||
loop
|
||||
Result.add (json_reference (c.item))
|
||||
c.forth
|
||||
end
|
||||
end
|
||||
|
||||
feature -- Change
|
||||
|
||||
add_converter (jc: JSON_CONVERTER) is
|
||||
-- Add the converter `jc'.
|
||||
require
|
||||
jc_not_void: jc /= Void
|
||||
do
|
||||
converters.force (jc, jc.object.generator)
|
||||
ensure
|
||||
has_converter: converter_for (jc.object) /= Void
|
||||
end
|
||||
|
||||
feature {NONE} -- Implementation
|
||||
|
||||
converters: DS_HASH_TABLE [JSON_CONVERTER, STRING] is
|
||||
-- Converters hashed by generator (base class)
|
||||
once
|
||||
create Result.make (10)
|
||||
end
|
||||
|
||||
feature {NONE} -- Implementation (Exceptions)
|
||||
|
||||
exception_prefix: STRING is "eJSON exception: "
|
||||
|
||||
exception_failed_to_convert_to_eiffel (a_value: JSON_VALUE; base_class: ?STRING): STRING is
|
||||
-- Exception message for failing to convert a JSON_VALUE to an instance of `a'.
|
||||
do
|
||||
Result := exception_prefix + "Failed to convert JSON_VALUE to an Eiffel object: " + a_value.generator
|
||||
if base_class /= Void then
|
||||
Result.append (" -> " + base_class)
|
||||
end
|
||||
end
|
||||
|
||||
exception_failed_to_convert_to_json (an_object: ?ANY): STRING is
|
||||
-- Exception message for failing to convert `a' to a JSON_VALUE.
|
||||
do
|
||||
Result := exception_prefix + "Failed to convert Eiffel object to a JSON_VALUE: " + an_object.generator
|
||||
end
|
||||
|
||||
feature {NONE} -- Implementation (JSON parser)
|
||||
|
||||
json_parser: JSON_PARSER is
|
||||
once
|
||||
create Result.make_parser ("")
|
||||
end
|
||||
|
||||
feature {NONE} -- Implementation (Basic Eiffel objects)
|
||||
|
||||
a_boolean: BOOLEAN
|
||||
|
||||
an_integer_8: INTEGER_8
|
||||
|
||||
an_integer_16: INTEGER_16
|
||||
|
||||
an_integer_32: INTEGER_32
|
||||
|
||||
an_integer_64: INTEGER_64
|
||||
|
||||
a_natural_8: NATURAL_8
|
||||
|
||||
a_natural_16: NATURAL_16
|
||||
|
||||
a_natural_32: NATURAL_32
|
||||
|
||||
a_natural_64: NATURAL_64
|
||||
|
||||
a_real_32: REAL_32
|
||||
|
||||
a_real_64: REAL_64
|
||||
|
||||
an_array: ARRAY [ANY] is
|
||||
once
|
||||
Result := <<>>
|
||||
end
|
||||
|
||||
a_character: CHARACTER
|
||||
|
||||
a_string_8: STRING_8 is
|
||||
once
|
||||
Result := ""
|
||||
end
|
||||
|
||||
a_uc_string: UC_STRING is
|
||||
once
|
||||
create Result.make_from_string ("")
|
||||
end
|
||||
|
||||
end -- class EJSON
|
||||
32
library/kernel/shared_ejson.e
Normal file
32
library/kernel/shared_ejson.e
Normal file
@@ -0,0 +1,32 @@
|
||||
indexing
|
||||
description: "[
|
||||
Shared factory class for creating JSON objects. Maps JSON
|
||||
objects to ELKS HASH_TABLEs and JSON arrays to ELKS
|
||||
LINKED_LISTs. Use non-conforming inheritance from this
|
||||
class to ensure that your classes share the same
|
||||
JSON_FACTORY instance.
|
||||
]"
|
||||
author: "Paul Cohen"
|
||||
date: "$Date: $"
|
||||
revision: "$Revision: $"
|
||||
file: "$HeadURL: $"
|
||||
|
||||
class SHARED_EJSON
|
||||
|
||||
feature
|
||||
|
||||
json: EJSON is
|
||||
-- A shared EJSON instance with default converters for
|
||||
-- DS_LINKED_LIST [ANY] and DS_HASH_TABLE [ANY, HASHABLE]
|
||||
local
|
||||
jllc: JSON_LINKED_LIST_CONVERTER
|
||||
jhtc: JSON_HASH_TABLE_CONVERTER
|
||||
once
|
||||
create Result
|
||||
create jllc.make
|
||||
Result.add_converter (jllc)
|
||||
create jhtc.make
|
||||
Result.add_converter (jhtc)
|
||||
end
|
||||
|
||||
end -- class SHARED_EJSON
|
||||
Reference in New Issue
Block a user