PFW: Type safe dynamic parameter access

BZ: 15065

Replaced high level string based parameter access interface with typed ones.
Now hosting platforms that want to control parameters must instantiate a
CParameterHandle object out of the desired parameter path.
CParameterHandle object may be used to access any kind of parameters, whatever
its internal type, whether it's an array or not.
Note that non rogue parameters offer a read access only. Any attempt to write
them will fail.
CParameterHandle objects offer the following kind of parameter accessing
interfaces:
- Boolean
- Integer (signed or unsigned)
- Double
- String
Note that those interfaces are available for scalar as well as for array
parameters.
Not all parameter types support all access kinds. Naturally, array parameters
are only accessed via array interfaces while scalar parameters are managed
through scalar interfaces.
Here's a list of parameter types that may be controlled through each kind of
access interface:
- Boolean access: boolean, bit (bit size must be one);
- Integer access: integer (sign must match), boolean (unsigned access only,
value <= 1), enumerations;
- Double access: for now only fixed points (soon integers will support them
also through platform adaptation objects)
- String access: all parameter types

In addition, cleaned up parameter access related code so as to make it more
generic and reusable.

Changed version to 2.0.0

Change-Id: Ib80868cdb773e90962e48f1f38d2ff0029189815
Signed-off-by: Patrick Benavoli <patrickx.benavoli@intel.com>
Reviewed-on: http://android.intel.com:8080/25406
Reviewed-by: Barthes, FabienX <fabienx.barthes@intel.com>
Tested-by: Barthes, FabienX <fabienx.barthes@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>

1 files changed, 27 insertions, 5 deletions

diff --git a/parameter/BaseParameter.h b/parameter/BaseParameter.h
index 2e3598d..c0db74f 100644
--- a/parameter/BaseParameter.h
+++ b/parameter/BaseParameter.h
@@ -31,6 +31,7 @@
 #pragma once
 
 #include <stdint.h>
+#include <vector>
 
 #include "InstanceConfigurableElement.h"
 
@@ -44,16 +45,37 @@ public:
 
     // XML configuration settings parsing/composing
     virtual bool serializeXmlSettings(CXmlElement& xmlConfigurationSettingsElementContent, CConfigurationAccessContext& configurationAccessContext) const;
+
+    // Check element is a parameter
+    virtual bool isParameter() const;
+
+    /// Value access
+    // Boolean access
+    virtual bool accessAsBoolean(bool& bValue, bool bSet, CParameterAccessContext& parameterAccessContext) const;
+    virtual bool accessAsBooleanArray(vector<bool>& abValues, bool bSet, CParameterAccessContext& parameterAccessContext) const;
+
+    // Integer Access
+    virtual bool accessAsInteger(uint32_t& uiValue, bool bSet, CParameterAccessContext& parameterAccessContext) const;
+    virtual bool accessAsIntegerArray(vector<uint32_t>& auiValues, bool bSet, CParameterAccessContext& parameterAccessContext) const;
+
+    // Signed Integer Access
+    virtual bool accessAsSignedInteger(int32_t& iValue, bool bSet, CParameterAccessContext& parameterAccessContext) const;
+    virtual bool accessAsSignedIntegerArray(vector<int32_t>& aiValues, bool bSet, CParameterAccessContext& parameterAccessContext) const;
+
+    // Double Access
+    virtual bool accessAsDouble(double& dValue, bool bSet, CParameterAccessContext& parameterAccessContext) const;
+    virtual bool accessAsDoubleArray(vector<double>& adValues, bool bSet, CParameterAccessContext& parameterAccessContext) const;
+
+    // String Access
+    bool accessAsString(string& strValue, bool bSet, CParameterAccessContext& parameterAccessContext) const;
+    virtual bool accessAsStringArray(vector<string>& astrValues, bool bSet, CParameterAccessContext& parameterAccessContext) const;
+
 protected:
     // Parameter Access
-    virtual bool setValue(CPathNavigator& pathNavigator, const string& strValue, CParameterAccessContext& parameterContext) const;
-    virtual bool getValue(CPathNavigator& pathNavigator, string& strValue, CParameterAccessContext& parameterContext) const;
+    virtual bool accessValue(CPathNavigator& pathNavigator, string& strValue, bool bSet, CParameterAccessContext& parameterAccessContext) const;
     virtual void logValue(string& strValue, CErrorContext& errorContext) const;
 
     // Actual value access (to be implemented by derived)
     virtual bool doSetValue(const string& strValue, uint32_t uiOffset, CParameterAccessContext& parameterAccessContext) const = 0;
     virtual void doGetValue(string& strValue, uint32_t uiOffset, CParameterAccessContext& parameterAccessContext) const = 0;
-
-    // Dynamic access checking
-    bool checkForDynamicAccess(CParameterAccessContext& parameterAccessContext) const;
 };