Devices: Make get methods of Device const

adds const qualifiers to the devices class getter methods.

Resolves the TODO: Make Get methods of device const in
documentation/Todo.txt

Changes:
- Added const qualifiers to getter methods in Device.h and Device.cpp
- replaced operator[] with find() in Device.h and Device.cpp to prevent
map modification in const
- Removed the corresponding Todo entry in documentation/Todo.txt

Change-Id: I78d5ea31b2d7539bcefda7b3e57a484d16103c25
Reviewed-on: https://review.haiku-os.org/c/haiku/+/10666
Tested-by: Commit checker robot <[email protected]>
Reviewed-by: Adrien Destugues <[email protected]>

src/apps/devices/Device.cpp

@@ -74,30 +74,42 @@ Device::~Device()
 
 
 BString
-Device::GetName()
+Device::GetName() const
 {
-	return fAttributeMap[B_TRANSLATE("Device name")];
+	AttributeMapIterator it = fAttributeMap.find(B_TRANSLATE("Device name"));
+	if (it != fAttributeMap.end())
+		return it->second;
+	return BString("unkown");
 }
 
 
 BString
-Device::GetManufacturer()
+Device::GetManufacturer() const
 {
-	return fAttributeMap[B_TRANSLATE("Manufacturer")];
+	AttributeMapIterator it = fAttributeMap.find(B_TRANSLATE("Manufacturer"));
+	if (it != fAttributeMap.end())
+		return it->second;
+	return BString("Unknown");
 }
 
 
 BString
-Device::GetDriverUsed()
+Device::GetDriverUsed() const
 {
-	return fAttributeMap[B_TRANSLATE("Driver used")];
+	AttributeMapIterator it = fAttributeMap.find(B_TRANSLATE("Driver used"));
+	if (it != fAttributeMap.end())
+		return it->second;
+	return BString("Unknown");
 }
 
 
 BString
-Device::GetDevPathsPublished()
+Device::GetDevPathsPublished() const
 {
-	return fAttributeMap[B_TRANSLATE("Device paths")];
+	AttributeMapIterator it = fAttributeMap.find(B_TRANSLATE("Device paths"));
+	if (it != fAttributeMap.end())
+		return it->second;
+	return BString("Unknown");
 }
 
 
@@ -112,7 +124,7 @@ Device::SetAttribute(const BString& name, const BString& value)
 
 
 Attributes
-Device::GetAllAttributes()
+Device::GetAllAttributes() const
 {
 	Attributes attributes;
 	AttributeMapIterator iter;
@@ -124,7 +136,7 @@ Device::GetAllAttributes()
 
 
 BString
-Device::GetAllStrings()
+Device::GetAllStrings() const
 {
 	BString str;
 	AttributeMapIterator iter;

src/apps/devices/Device.h

@@ -83,10 +83,10 @@ public:
 								const BString& devPathsPublished = "unknown");
 	virtual					~Device();
 
-	virtual BString			GetName();
-	virtual BString			GetManufacturer();
-	virtual BString			GetDriverUsed();
-	virtual BString			GetDevPathsPublished();
+	virtual BString			GetName() const;
+	virtual BString			GetManufacturer() const;
+	virtual BString			GetDriverUsed() const;
+	virtual BString			GetDevPathsPublished() const;
 	virtual Category		GetCategory() const
 								{ return fCategory; }
 	virtual Device*			GetPhysicalParent() const
@@ -94,12 +94,16 @@ public:
 	virtual BusType			GetBusType() const
 								{ return fBusType; }
 
-	virtual Attributes		GetAllAttributes();
-	virtual BString			GetAllStrings();
+	virtual Attributes		GetAllAttributes() const;
+	virtual BString			GetAllStrings() const;
 
-	virtual Attribute		GetAttribute(const BString& name)
-								{ return Attribute(name.String(),
-									 fAttributeMap[name]); }
+	virtual Attribute		GetAttribute(const BString& name) const
+								{
+									AttributeMapIterator it = fAttributeMap.find(name);
+									if (it != fAttributeMap.end())
+										return Attribute(name.String(), it->second);
+									return Attribute(name.String(), "");
+								}
 
 	virtual void 			SetAttribute(const BString& name,
 								const BString& value);

src/apps/devices/Documentation/Todo.txt

@@ -1,6 +1,5 @@
 TODO:
  * There still is a memory leak somewhere, hunt it down
- * Make Get methods of Device const
  * Fix view color?
  * Fix forwarding of messages to view
  * Bottom scrollbar strangeness