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%
% Copyright (c) ZeroC, Inc. All rights reserved.
%
classdef (Abstract) EncapsDecoder < handle
methods
function obj = EncapsDecoder(is, encaps, sliceValues, valueFactoryManager, classResolver, classGraphDepthMax)
obj.is = is;
obj.encaps = encaps;
obj.sliceValues = sliceValues;
obj.valueFactoryManager = valueFactoryManager;
obj.classResolver = classResolver;
obj.classGraphDepthMax = classGraphDepthMax;
obj.classGraphDepth = 0;
obj.patchMap = {};
obj.patchMapLength = 0;
obj.unmarshaledMap = {};
obj.typeIdMap = {};
obj.typeIdConstructorMap = {};
obj.valueList = {};
obj.delayedPostUnmarshal = {};
end
function r = readOptional(~, ~, ~)
r = false;
end
function readPendingValues(~)
end
function finish(obj)
%
% This is our opportunity for unmarshaled values to do some post processing after the initial round
% of unmarshaling is complete.
%
if ~isempty(obj.delayedPostUnmarshal)
%
% First call icePostUnmarshal on every instance. This allows the generated code to finish its tasks.
%
for i = 1:length(obj.delayedPostUnmarshal)
v = obj.delayedPostUnmarshal{i};
v.icePostUnmarshal();
end
%
% Then call ice_postUnmarshal on every instance. This is the application's interception point.
%
for i = 1:length(obj.delayedPostUnmarshal)
v = obj.delayedPostUnmarshal{i};
try
v.ice_postUnmarshal();
catch ex
msg = sprintf('exception raised by ice_postUnmarshal:\n%s', getReport(ex, 'extended'));
obj.is.getCommunicator().getLogger().warning(msg);
end
end
obj.delayedPostUnmarshal = {};
end
end
end
methods(Abstract)
readValue(obj, cb)
throwException(obj)
startInstance(obj, sliceType)
r = endInstance(obj, preserve)
r = startSlice(obj)
endSlice(obj)
skipSlice(obj)
end
methods(Access=protected)
function r = getTypeId(obj, typeIdIndex)
if typeIdIndex <= length(obj.typeIdMap)
r = obj.typeIdMap{typeIdIndex};
else
throw(Ice.UnmarshalOutOfBoundsException());
end
end
function [typeIdIndex, typeId] = readTypeId(obj)
typeId = obj.is.readString();
obj.typeIdMap{end + 1} = typeId;
typeIdIndex = length(obj.typeIdMap);
end
function r = newInstance(obj, typeIdIndex, typeId)
if typeIdIndex >= 0 && typeIdIndex <= length(obj.typeIdConstructorMap)
constructor = obj.typeIdConstructorMap{typeIdIndex};
else
constructor = obj.getConstructor(typeId);
if ~isempty(constructor)
obj.typeIdConstructorMap{typeIdIndex} = constructor;
end
end
if ~isempty(constructor)
try
r = constructor(); % Invoke the constructor.
catch e
reason = sprintf('constructor failed for %s', typeId);
ex = Ice.NoValueFactoryException('', reason, reason, typeId);
ex.addCause(e);
throw(ex);
end
else
r = [];
end
end
function r = getConstructor(obj, typeId)
%
% Try to find a factory registered for the specific type.
%
r = [];
userFactory = obj.valueFactoryManager.find(typeId);
if ~isempty(userFactory)
r = @() userFactory(typeId);
else
%
% Last chance: ask the class resolver to find it.
%
constructor = obj.classResolver.resolve(typeId);
if ~isempty(constructor)
r = @() constructor(IceInternal.NoInit.Instance);
end
end
end
function addPatchEntry(obj, index, cb)
%assert(index > 0);
%
% Check if we have already unmarshalled the instance. If that's the case,
% just invoke the callback and we're done.
%
if index <= length(obj.unmarshaledMap)
v = obj.unmarshaledMap{index};
if ~isempty(v)
cb(v);
return;
end
end
%
% Add patch entry if the instance isn't unmarshaled yet,
% the callback will be called when the instance is
% unmarshaled.
%
if index <= length(obj.patchMap)
pl = obj.patchMap{index};
else
%
% We have no outstanding instances to be patched for this
% index, so make a new entry in the patch map.
%
pl = {};
obj.patchMapLength = obj.patchMapLength + 1;
end
%
% Append a patch entry for this instance.
%
e = IceInternal.PatchEntry();
e.cb = cb;
e.classGraphDepth = obj.classGraphDepth;
pl{end + 1} = e;
obj.patchMap{index} = pl;
end
function unmarshal(obj, index, v)
%
% Add the instance to the map of unmarshaled instances, this must
% be done before reading the instances (for circular references).
%
obj.unmarshaledMap{index} = v;
%
% Read the instance.
%
v.iceRead(obj.is);
if index <= length(obj.patchMap)
%
% Patch all instances now that the instance is unmarshaled.
%
l = obj.patchMap{index};
%
% Patch all pointers that refer to the instance.
%
for i = 1:length(l)
e = l{i};
e.cb(v);
end
%
% Clear out the patch map for that index -- there is nothing left
% to patch for that index for the time being.
%
obj.patchMap{index} = [];
obj.patchMapLength = obj.patchMapLength - 1;
end
if obj.patchMapLength == 0 && isempty(obj.valueList)
if v.iceDelayPostUnmarshal()
obj.delayedPostUnmarshal{end + 1} = v; % See finish()
else
try
v.ice_postUnmarshal();
catch ex
msg = sprintf('exception raised by ice_postUnmarshal:\n%s', getReport(ex, 'extended'));
obj.is.getCommunicator().getLogger().warning(msg);
end
end
else
obj.valueList{end + 1} = v;
if obj.patchMapLength == 0
%
% Iterate over the instance list and invoke ice_postUnmarshal on
% each instance. We must do this after all instances have been
% unmarshaled in order to ensure that any instance data members
% have been properly patched.
%
for i = 1:length(obj.valueList)
p = obj.valueList{i};
if p.iceDelayPostUnmarshal()
obj.delayedPostUnmarshal{end + 1} = p; % See finish()
else
try
p.ice_postUnmarshal();
catch ex
msg = sprintf('exception raised by ice_postUnmarshal:\n%s', getReport(ex, 'extended'));
obj.is.getCommunicator().getLogger().warning(msg);
end
end
end
obj.valueList = {};
end
end
end
end
properties(Access=protected)
is
encaps
sliceValues
valueFactoryManager
classResolver
classGraphDepth
classGraphDepthMax
patchMap
patchMapLength
end
properties(Access=private)
unmarshaledMap
typeIdConstructorMap
typeIdMap
valueList
delayedPostUnmarshal
end
end
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