Custom DFG errors

src/DataBlobs/services/BlobEntry.jl

@@ -67,18 +67,14 @@ Also see: [`addBlobentry!`](@ref), [`getBlob`](@ref), [`listBlobentries`](@ref)
 """
 function getBlobentry(var::AbstractDFGVariable, key::Symbol)
     if !hasBlobentry(var, key)
-        throw(
-            KeyError(
-                "No dataEntry label $(key) found in variable $(getLabel(var)). Available keys: $(keys(var.dataDict))",
-            ),
-        )
+        throw(DFGLabelError(key, keys(var.dataDict)))
     end
     return var.dataDict[key]
 end
 
 function getBlobentry(var::VariableDFG, key::Symbol)
     if !hasBlobentry(var, key)
-        throw(KeyError(key))
+        throw(DFGLabelError(key))
     end
     return var.blobEntries[findfirst(x -> x.label == key, var.blobEntries)]
 end

src/DistributedFactorGraphs.jl

@@ -354,6 +354,7 @@ export plotDFG
 ##==============================================================================
 
 # Entities
+include("errors.jl")
 
 include("entities/AbstractDFG.jl")
 

src/errors.jl

@@ -0,0 +1,60 @@
+"""
+    DFGLabelNotFoundError(label, available)
+
+Error thrown when a requested label is not found in the factor graph.
+
+# Arguments
+- `label`: The label that was not found.
+- `available`: The list of available labels.
+"""
+struct DFGLabelNotFoundError <: Exception
+    label::Any
+    available::Any
+end
+
+DFGLabelNotFoundError(label::T) where {T} = DFGLabelNotFoundError(label, T[])
+
+function Base.showerror(io::IO, ex::DFGLabelNotFoundError)
+    print(io, "DFGLabelNotFoundError: label ", ex.label, " not found.")
+    if !isempty(ex.available)
+        println(io, " Available labels:")
+        show(io, ex.available)
+    end
+end
+
+"""
+    DFGLabelExistsError(label)
+
+Error thrown when attempting to add a label that already exists in the factor graph.
+
+# Arguments
+- `label`: The label that already exists.
+"""
+struct DFGLabelExistsError <: Exception
+    label::Any
+end
+
+function Base.showerror(io::IO, ex::DFGLabelExistsError)
+    return print(
+        io,
+        "DFGLabelExistsError: label ",
+        ex.label,
+        " already exists in the factor graph.",
+    )
+end
+
+"""
+    DFGSerializationError(msg)
+
+Error thrown when serialization or deserialization fails.
+
+# Arguments
+- `msg`: Description of the serialization error.
+"""
+struct DFGSerializationError <: Exception
+    msg::String
+end
+
+function Base.showerror(io::IO, ex::DFGSerializationError)
+    return print(io, "DFGSerializationError: ", ex.msg)
+end