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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 = containers.Map('KeyType', 'int32', 'ValueType', 'any');
obj.unmarshaledMap = containers.Map('KeyType', 'int32', 'ValueType', 'any');
obj.typeIdMap = containers.Map('KeyType', 'int32', 'ValueType', 'char');
obj.typeIdIndex = 0;
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 = readTypeId(obj, isIndex)
if isIndex
index = obj.is.readSize();
%
% The map raises an exception if the key isn't present.
%
try
r = obj.typeIdMap(index);
catch ex
throw(Ice.UnmarshalOutOfBoundsException());
end
else
r = obj.is.readString();
obj.typeIdIndex = obj.typeIdIndex + 1;
obj.typeIdMap(obj.typeIdIndex) = r;
end
end
function r = newInstance(obj, typeId)
%
% Try to find a factory registered for the specific type.
%
userFactory = obj.valueFactoryManager.find(typeId);
v = [];
if ~isempty(userFactory)
v = userFactory(typeId);
end
%
% If that fails, invoke the default factory if one has been registered.
%
if isempty(v)
userFactory = obj.valueFactoryManager.find('');
if ~isempty(userFactory)
v = userFactory(typeId);
end
end
%
% Last chance: ask the class resolver to find it.
%
if isempty(v)
constructor = obj.classResolver.resolve(typeId);
if ~isempty(constructor)
try
v = 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
end
end
r = v;
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 obj.unmarshaledMap.isKey(index)
v = obj.unmarshaledMap(index);
cb(v);
return;
end
%
% Add patch entry if the instance isn't unmarshaled yet,
% the callback will be called when the instance is
% unmarshaled.
%
if obj.patchMap.isKey(index)
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 = IceInternal.PatchList();
obj.patchMap(index) = pl;
end
%
% Append a patch entry for this instance.
%
e = IceInternal.PatchEntry();
e.cb = cb;
e.classGraphDepth = obj.classGraphDepth;
pl.list{end + 1} = e;
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 ~isempty(obj.patchMap) && obj.patchMap.isKey(index)
%
% Patch all instances now that the instance is unmarshaled.
%
l = obj.patchMap(index);
assert(~isempty(l.list));
%
% Patch all pointers that refer to the instance.
%
for i = 1:length(l.list)
e = l.list{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.remove(index);
end
if (isempty(obj.patchMap) || obj.patchMap.Count == 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 isempty(obj.patchMap) || obj.patchMap.Count == 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
end
properties(Access=private)
unmarshaledMap
typeIdMap
typeIdIndex
valueList
delayedPostUnmarshal
end
end
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