Add support for Timestamp(String and Double) for smithy codegen (#3195)

* add timestamp support for smithy codegen

Author: sbera87

tools/code-generation/smithy/codegen/cpp-smoke-tests-codegen/src/main/java/com/amazonaws/util/awsclientsmithygenerator/generators/GenericCodegenAdapter.java

@@ -27,6 +27,8 @@ public interface GenericCodegenAdapter<SHAPE, DATA> {
 
     public boolean isList(DATA d);
 
+    public boolean isDouble(DATA d);
+
     public boolean isFloatShape( SHAPE s);
 
     public boolean isBooleanShape(SHAPE s);
@@ -41,6 +43,10 @@ public interface GenericCodegenAdapter<SHAPE, DATA> {
 
     public boolean isEnumShape( SHAPE s);
 
+    public boolean isTimestampShape(SHAPE s);
+
+    public boolean isDoubleShape( SHAPE s);
+
     public List<DATA> getList(DATA d);
 
     public Map<String, DATA> getMap(DATA d);
@@ -55,6 +61,8 @@ public interface GenericCodegenAdapter<SHAPE, DATA> {
 
     public Integer getInteger(DATA d);
 
+    public Double getDouble(DATA d);
+
     public String getShapeName(SHAPE s);
 
     public void recordContainerForImport(SHAPE s);
@@ -191,6 +199,21 @@ else if (isString(value) && isEnumShape(shape))
             String shapeName = getShapeName(shape);
             functionName = String.format("{%s::%s}",shapeName,value);
         }
+        else if(isTimestampShape(shape))
+        {
+            if(isString(value))
+            {
+                functionName = String.format("\"%s\"",value);
+            }
+            else if(isDouble(value))
+            {
+                functionName = String.format("{(double)%s}",value);
+            }
+            else
+            {
+                throw new RuntimeException("unsupported timestamp shape format");
+            }
+        }
         else
         {
             throw new RuntimeException(String.format("shape not supported:%s",shape));

tools/code-generation/smithy/codegen/cpp-smoke-tests-codegen/src/main/java/com/amazonaws/util/awsclientsmithygenerator/generators/SmithyCodegenAdapter.java

@@ -126,12 +126,29 @@ public boolean isList(Node d)
         return d.isArrayNode();
     }
 
+    @Override
+    public boolean isDouble(Node d)
+    {
+        if(d.isNumberNode())
+        {
+            double v = d.asNumberNode().get().asBigDecimal().get().doubleValue();
+            return  Double.isFinite(v) && !Double.isNaN(v) ;
+        }
+        return false;
+    }
+
     @Override
     public boolean isFloatShape( Shape s)
     {
         return s.getType() == ShapeType.FLOAT;
     }
 
+    @Override
+    public boolean isDoubleShape( Shape s)
+    {
+        return s.getType() == ShapeType.DOUBLE;
+    }
+
     @Override
     public boolean isBooleanShape(Shape s)
     {
@@ -168,6 +185,12 @@ public boolean isEnumShape( Shape s)
         return s.getType() == ShapeType.ENUM;
     }
 
+    @Override
+    public boolean isTimestampShape(Shape s)
+    {
+        return s.getType() == ShapeType.TIMESTAMP;
+    }
+
     @Override
     public List<Node> getList(Node d)
     {
@@ -198,6 +221,12 @@ public Float getFloat(Node d)
         return d.asNumberNode().get().asBigDecimal().get().floatValue();
     }
 
+    @Override
+    public Double getDouble(Node d)
+    {
+        return d.asNumberNode().get().asBigDecimal().get().doubleValue();
+    }
+
     @Override
     public Integer getInteger(Node d)
     {