/// <summary>
/// Register a graph rewrite sequence definition.
/// An interpreted sequence can be overwritten by a new one of the same name and signature.
/// A compiled sequence is fixed, an exception is thrown if you try to set a sequence of the same name.
/// </summary>
/// <param name="sequenceDef">The sequence definition</param>
/// <returns>Returns true if an existing definition was overwritten.</returns>
public bool RegisterGraphRewriteSequenceDefinition(SequenceDefinition sequenceDef)
{
if(namesToSequenceDefinitions.ContainsKey(sequenceDef.SequenceName))
{
if(namesToSequenceDefinitions[sequenceDef.SequenceName] is SequenceDefinitionCompiled)
{
throw new Exception("A compiled sequence can't be overwritten!");
}
SequenceDefinitionInterpreted existingSequenceDef = (SequenceDefinitionInterpreted)namesToSequenceDefinitions[sequenceDef.SequenceName];
SequenceDefinitionInterpreted interpretedSequenceDef = (SequenceDefinitionInterpreted)sequenceDef;
if(interpretedSequenceDef.InputVariables.Length != existingSequenceDef.InputVariables.Length)
throw new Exception("Old and new sequence definition for " + sequenceDef.SequenceName + " have a different number of parameters");
for(int i = 0; i < interpretedSequenceDef.InputVariables.Length; ++i)
if(interpretedSequenceDef.InputVariables[i].Type != existingSequenceDef.InputVariables[i].Type)
throw new Exception("Old and new sequence definition for " + sequenceDef.SequenceName + " differ in parameter #" + i);
if(interpretedSequenceDef.OutputVariables.Length != existingSequenceDef.OutputVariables.Length)
throw new Exception("Old and new sequence definition for " + sequenceDef.SequenceName + " have a different number of output parameters");
for(int i = 0; i < interpretedSequenceDef.OutputVariables.Length; ++i)
if(interpretedSequenceDef.OutputVariables[i].Type != existingSequenceDef.OutputVariables[i].Type)
throw new Exception("Old and new sequence definition for " + sequenceDef.SequenceName + " differ in output parameter #" + i);
namesToSequenceDefinitions[sequenceDef.SequenceName] = sequenceDef; // replace definition in map by name used for new sequences
foreach(SequenceDefinition seqDef in namesToSequenceDefinitions.Values) // replace all references in old sequences to new one
{
if(!(seqDef is SequenceDefinitionCompiled))
seqDef.ReplaceSequenceDefinition(existingSequenceDef, sequenceDef);
}
existingSequenceDef.WasReplacedBy(sequenceDef); // flush sequence copy cache for this name
return true;
}
namesToSequenceDefinitions.Add(sequenceDef.SequenceName, sequenceDef);
return false;
}
internal override void ReplaceSequenceDefinition(SequenceDefinition oldDef, SequenceDefinition newDef)
{
throw new Exception("ReplaceSequenceDefinition not supported on compiled sequences");
}
internal override void ReplaceSequenceDefinition(SequenceDefinition oldDef, SequenceDefinition newDef)
{
if(ParamBindings.SequenceDef==oldDef)
ParamBindings.SequenceDef = newDef;
}
public void WasReplacedBy(SequenceDefinition newSeq)
{
if(newSeq.SequenceName != SequenceName)
throw new Exception("Internal Failure: name mismatch on sequence replacement");
nameToCopies.Remove(SequenceName);
}
internal override void ReplaceSequenceDefinition(SequenceDefinition oldDef, SequenceDefinition newDef)
{
Seq.ReplaceSequenceDefinition(oldDef, newDef);
}
internal override void ReplaceSequenceDefinition(SequenceDefinition oldDef, SequenceDefinition newDef)
{
foreach(Sequence seq in Sequences)
seq.ReplaceSequenceDefinition(oldDef, newDef);
}
internal override void ReplaceSequenceDefinition(SequenceDefinition oldDef, SequenceDefinition newDef)
{
Condition.ReplaceSequenceDefinition(oldDef, newDef);
TrueCase.ReplaceSequenceDefinition(oldDef, newDef);
FalseCase.ReplaceSequenceDefinition(oldDef, newDef);
}
/// <summary>
/// After a sequence definition was replaced by a new one, all references from then on will use the new one,
/// but the old references are still there and must get replaced.
/// </summary>
/// <param name="oldDef">The old definition which is to be replaced</param>
/// <param name="newDef">The new definition which replaces the old one</param>
internal virtual void ReplaceSequenceDefinition(SequenceDefinition oldDef, SequenceDefinition newDef)
{
// most sequences are basic ones not referencing seqences
// this null implementation saves us the effort of implementing this method everywhere, needed or not
}