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note description: "[ Event filter that concatenates successive on_content events Note: the original code is from Gobo's XM library (http://www.gobosoft.com/) ]" date: "$Date: 2013-05-20 15:15:17 -0800 (Mon, 20 May 2013) $" revision: "$Revision: 92557 $" class interface XML_CONTENT_CONCATENATOR create make_null -- Don't forward anything -- (from XML_FORWARD_CALLBACKS) set_next (a_callbacks: like next) -- Set callbacks to a_callbacks. -- (from XML_FORWARD_CALLBACKS) require -- from XML_CALLBACKS_SOURCE a_callback_not_void: a_callbacks /= Void ensure then -- from XML_FORWARD_CALLBACKS callbacks_set: next = a_callbacks feature -- Access associated_parser: detachable XML_PARSER -- Associated parser -- mainly used to report error back to the parser -- to handle position -- (from XML_CALLBACKS) next: XML_CALLBACKS -- Callbacks event interface to which events are forwarded; -- (from XML_FORWARD_CALLBACKS) generating_type: TYPE [detachable XML_CONTENT_CONCATENATOR] -- Type of current object -- (type of which it is a direct instance) -- (from ANY) ensure -- from ANY generating_type_not_void: Result /= Void generator: STRING_8 -- Name of current object's generating class -- (base class of the type of which it is a direct instance) -- (from ANY) ensure -- from ANY generator_not_void: Result /= Void generator_not_empty: not Result.is_empty feature -- Comparison frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void -- or attached to isomorphic object structures? -- (from ANY) ensure -- from ANY instance_free: class shallow_implies_deep: standard_equal (a, b) implies Result both_or_none_void: (a = Void) implies (Result = (b = Void)) same_type: (Result and (a /= Void)) implies (b /= Void and then a.same_type (b)) symmetric: Result implies deep_equal (b, a) frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached -- to objects considered equal? -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b)) frozen is_deep_equal alias "≡≡≡" (other: XML_CONTENT_CONCATENATOR): BOOLEAN -- Are Current and other attached to isomorphic object structures? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY shallow_implies_deep: standard_is_equal (other) implies Result same_type: Result implies same_type (other) symmetric: Result implies other.is_deep_equal (Current) is_equal (other: XML_CONTENT_CONCATENATOR): BOOLEAN -- Is other attached to an object considered -- equal to current object? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY symmetric: Result implies other ~ Current consistent: standard_is_equal (other) implies Result frozen standard_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached to -- field-by-field identical objects of the same type? -- Always uses default object comparison criterion. -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b)) frozen standard_is_equal alias "" (other: XML_CONTENT_CONCATENATOR): BOOLEAN -- Is other attached to an object of the same type -- as current object, and field-by-field identical to it? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY same_type: Result implies same_type (other) symmetric: Result implies other.standard_is_equal (Current) feature -- Status report conforms_to (other: ANY): BOOLEAN -- Does type of current object conform to type -- of other (as per Eiffel: The Language, chapter 13)? -- (from ANY) require -- from ANY other_not_void: other /= Void same_type (other: ANY): BOOLEAN -- Is type of current object identical to type of other? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY definition: Result = (conforms_to (other) and other.conforms_to (Current)) feature -- Element change set_associated_parser (p: like associated_parser) -- Set p to associated_parser -- (from XML_CALLBACKS) feature -- Duplication copy (other: XML_CONTENT_CONCATENATOR) -- Update current object using fields of object attached -- to other, so as to yield equal objects. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_equal: Current ~ other frozen deep_copy (other: XML_CONTENT_CONCATENATOR) -- Effect equivalent to that of: -- copy (other . deep_twin) -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY deep_equal: deep_equal (Current, other) frozen deep_twin: XML_CONTENT_CONCATENATOR -- New object structure recursively duplicated from Current. -- (from ANY) ensure -- from ANY deep_twin_not_void: Result /= Void deep_equal: deep_equal (Current, Result) frozen standard_copy (other: XML_CONTENT_CONCATENATOR) -- Copy every field of other onto corresponding field -- of current object. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_standard_equal: standard_is_equal (other) frozen standard_twin: XML_CONTENT_CONCATENATOR -- New object field-by-field identical to other. -- Always uses default copying semantics. -- (from ANY) ensure -- from ANY standard_twin_not_void: Result /= Void equal: standard_equal (Result, Current) frozen twin: XML_CONTENT_CONCATENATOR -- New object equal to Current -- twin calls copy; to change copying/twinning semantics, redefine copy. -- (from ANY) ensure -- from ANY twin_not_void: Result /= Void is_equal: Result ~ Current feature -- Basic operations frozen default: detachable XML_CONTENT_CONCATENATOR -- Default value of object's type -- (from ANY) frozen default_pointer: POINTER -- Default value of type POINTER -- (Avoid the need to write p.default for -- some p of type POINTER.) -- (from ANY) ensure -- from ANY instance_free: class default_rescue -- Process exception for routines with no Rescue clause. -- (Default: do nothing.) -- (from ANY) frozen do_nothing -- Execute a null action. -- (from ANY) ensure -- from ANY instance_free: class feature -- Assertion has_resolved_namespaces: BOOLEAN -- Does this callback event consumer expect resolved -- namespaces? -- If True, it must be located downstream of a filter -- or source producing resolved namespaces such -- as XML_NAMESPACE_RESOLVER. -- (from XML_CALLBACKS) feature -- Content on_comment (a_comment: READABLE_STRING_32) -- Eat comment when in content, otherwise the event would be -- out of order. require -- from XML_CALLBACKS a_content_not_void: a_comment /= Void on_content (a_content: READABLE_STRING_32) -- Aggregate content events so that two content events -- never follow each other. require -- from XML_CALLBACKS not_void: a_content /= Void not_empty: a_content.count >= 0 feature -- Document on_start -- Forward start. -- (from XML_FORWARD_CALLBACKS) require -- from XML_CALLBACKS True on_xml_declaration (a_version: READABLE_STRING_32; an_encoding: detachable READABLE_STRING_32; a_standalone: BOOLEAN) -- XML declaration. -- (from XML_FORWARD_CALLBACKS) require -- from XML_CALLBACKS a_version_not_void: a_version /= Void a_version_not_empty: a_version.count > 0 a_version_is_valid: a_version.is_valid_as_string_8 an_encoding_is_valid: an_encoding /= Void implies an_encoding.is_valid_as_string_8 feature -- Errors on_error (a_message: READABLE_STRING_32) -- Event producer detected an error. -- (from XML_FORWARD_CALLBACKS) require -- from XML_CALLBACKS not_void: a_message /= Void feature -- Events on_attribute (a_namespace: detachable READABLE_STRING_32; a_prefix: detachable READABLE_STRING_32; a_local_part: READABLE_STRING_32; a_value: READABLE_STRING_32) -- Flush content and forward. require -- from XML_CALLBACKS unresolved_namespace_is_void: has_resolved_namespaces implies a_namespace /= Void local_part: is_local_part (a_local_part) a_value_not_void: a_value /= Void on_end_tag (a_namespace: detachable READABLE_STRING_32; a_prefix: detachable READABLE_STRING_32; a_local_part: READABLE_STRING_32) -- Flush content and forward. require -- from XML_CALLBACKS unresolved_namespace_is_void: has_resolved_namespaces implies a_namespace /= Void local_part: is_local_part (a_local_part) on_finish -- Flush content and forward. require -- from XML_CALLBACKS True on_processing_instruction (a_name: READABLE_STRING_32; a_content: READABLE_STRING_32) -- Flush content and forward. require -- from XML_CALLBACKS name_not_void: a_name /= Void content_not_void: a_content /= Void on_start_tag (a_namespace: detachable READABLE_STRING_32; a_prefix: detachable READABLE_STRING_32; a_local_part: READABLE_STRING_32) -- Flush content and forward. require -- from XML_CALLBACKS unresolved_namespace_is_void: has_resolved_namespaces implies a_namespace /= Void local_part: is_local_part (a_local_part) feature -- Output Io: STD_FILES -- Handle to standard file setup -- (from ANY) ensure -- from ANY instance_free: class io_not_void: Result /= Void out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY out_not_void: Result /= Void print (o: detachable ANY) -- Write terse external representation of o -- on standard output. -- (from ANY) ensure -- from ANY instance_free: class frozen tagged_out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY tagged_out_not_void: Result /= Void feature -- Platform Operating_environment: OPERATING_ENVIRONMENT -- Objects available from the operating system -- (from ANY) ensure -- from ANY instance_free: class operating_environment_not_void: Result /= Void feature -- Setting set_next (a_callbacks: like next) -- Set callbacks to a_callbacks. -- (from XML_FORWARD_CALLBACKS) require -- from XML_CALLBACKS_SOURCE a_callback_not_void: a_callbacks /= Void ensure then -- from XML_FORWARD_CALLBACKS callbacks_set: next = a_callbacks feature -- Support has_namespace (a: detachable READABLE_STRING_32): BOOLEAN -- Is namespace resolved? -- (from XML_CALLBACKS) has_prefix (a: detachable READABLE_STRING_32): BOOLEAN -- Is prefix in use? -- (from XML_CALLBACKS) is_local_part (a: detachable READABLE_STRING_32): BOOLEAN -- Is this a valid local part string? -- (from XML_CALLBACKS) ensure -- from XML_CALLBACKS definition: Result = (a /= Void and then a.count > 0) feature -- Tag on_start_tag_finish -- End of start tag. -- (from XML_FORWARD_CALLBACKS) require -- from XML_CALLBACKS True invariant -- from XML_CALLBACKS_FILTER next_not_void: next /= Void -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) note copyright: "Copyright (c) 1984-2012, Eiffel Software and others" license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)" source: "[ Eiffel Software 5949 Hollister Ave., Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Website http://www.eiffel.com Customer support http://support.eiffel.com ]" end -- class XML_CONTENT_CONCATENATOR
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