Massive name changes to factory.

The changes make it clear what is a default implementation and
what implements base classes defined in pvData.h.

pvDataApp/factory/DefaultPVString.cpp

@@ -0,0 +1,65 @@
+/*PVString.cpp*/
+/**
+ * Copyright - See the COPYRIGHT that is included with this distribution.
+ * EPICS pvDataCPP is distributed subject to a Software License Agreement found
+ * in file LICENSE that is included with this distribution.
+ */
+#include <cstddef>
+#include <cstdlib>
+#include <string>
+#include <cstdio>
+#include "pvData.h"
+#include "convert.h"
+#include "factory.h"
+#include "byteBuffer.h"
+#include "serializeHelper.h"
+
+namespace epics { namespace pvData {
+
+    class BasePVString : public PVString {
+    public:
+        BasePVString(PVStructure *parent,ScalarConstPtr scalar);
+        virtual ~BasePVString();
+        virtual String get();
+        virtual void put(String val);
+        virtual void serialize(ByteBuffer *pbuffer,
+            SerializableControl *pflusher) ;
+        virtual void deserialize(ByteBuffer *pbuffer,
+            DeserializableControl *pflusher);
+        virtual bool operator==(PVField& pv) ;
+        virtual bool operator!=(PVField& pv) ;
+    private:
+        String value;
+    };
+
+    BasePVString::BasePVString(PVStructure *parent,ScalarConstPtr scalar)
+    : PVString(parent,scalar),value("")
+    {}
+
+    BasePVString::~BasePVString() {}
+
+    String BasePVString::get() { return value;}
+
+    void BasePVString::put(String val){value = val;}
+
+    void BasePVString::serialize(ByteBuffer *pbuffer,
+        SerializableControl *pflusher) {
+        SerializeHelper::serializeString(value, pbuffer, pflusher);
+    }
+
+    void BasePVString::deserialize(ByteBuffer *pbuffer,
+        DeserializableControl *pflusher) {
+        value = SerializeHelper::deserializeString(pbuffer, pflusher);
+    }
+
+    bool BasePVString::operator==(PVField& pvField)
+    {
+        return getConvert()->equals(this, &pvField);
+    }
+
+    bool BasePVString::operator!=(PVField& pvField)
+    {
+        return !(getConvert()->equals(this, &pvField));
+    }
+
+}}