* Patch from BBaz to add an overload to find returning a boolean (bug ID

git-svn-id: trunk@35343 -

packages/fcl-json/src/fpjson.pp

@@ -537,6 +537,12 @@ Type
     Function IndexOfName(const AName: TJSONStringType; CaseInsensitive : Boolean = False): Integer;
     Function Find(Const AName : String) : TJSONData; overload;
     Function Find(Const AName : String; AType : TJSONType) : TJSONData; overload;
+    function Find(const key: TJSONStringType; out AValue: TJSONData): boolean;
+    function Find(const key: TJSONStringType; out AValue: TJSONObject): boolean;
+    function Find(const key: TJSONStringType; out AValue: TJSONArray): boolean;
+    function Find(const key: TJSONStringType; out AValue: TJSONString): boolean;
+    function Find(const key: TJSONStringType; out AValue: TJSONBoolean): boolean;
+    function Find(const key: TJSONStringType; out AValue: TJSONNumber): boolean;
     Function Get(Const AName : String) : Variant;
     Function Get(Const AName : String; ADefault : TJSONFloat) : TJSONFloat;
     Function Get(Const AName : String; ADefault : Integer) : Integer;
@@ -3155,6 +3161,87 @@ begin
     Result:=Nil;
 end;
 
+function TJSONObject.Find(const key: TJSONStringType; out AValue: TJSONData): boolean;
+begin
+  AValue := Find(key);
+  result := assigned(AValue);
+end;
+
+function TJSONObject.Find(const key: TJSONStringType; out AValue: TJSONObject): boolean;
+var
+  v: TJSONData;
+begin
+  v := Find(key);
+  if assigned(v) then
+  begin
+    result := v.JSONType = jtObject;
+    if result then
+      AValue := TJSONObject(v);
+  end
+  else
+    result := false;
+end;
+
+function TJSONObject.Find(const key: TJSONStringType; out AValue: TJSONArray): boolean;
+var
+  v: TJSONData;
+begin
+  v := Find(key);
+  if assigned(v) then
+  begin
+    result := v.JSONType = jtArray;
+    if result then
+      AValue := TJSONArray(v);
+  end
+  else
+    result := false;
+end;
+
+function TJSONObject.Find(const key: TJSONStringType; out AValue: TJSONString): boolean;
+var
+  v: TJSONData;
+begin
+  v := Find(key);
+  if assigned(v) then
+  begin
+    result := v.JSONType = jtString;
+    if result then
+      AValue := TJSONString(v);
+  end
+  else
+    result := false;
+end;
+
+function TJSONObject.Find(const key: TJSONStringType; out AValue: TJSONBoolean): boolean;
+var
+  v: TJSONData;
+begin
+  v := Find(key);
+  if assigned(v) then
+  begin
+    result := v.JSONType = jtBoolean;
+    if result then
+      AValue := TJSONBoolean(v);
+  end
+  else
+    result := false;
+end;
+
+function TJSONObject.Find(const key: TJSONStringType; out AValue: TJSONNumber): boolean;
+var
+  v: TJSONData;
+begin
+  v := Find(key);
+  if assigned(v) then
+  begin
+    result := v.JSONType = jtNumber;
+    if result then
+      AValue := TJSONNumber(v);
+  end
+  else
+    result := false;
+end;
+
 initialization
   // Need to force initialization;
   TJSONData.DetermineElementSeparators;

packages/fcl-json/tests/testjsondata.pp

@@ -256,6 +256,7 @@ type
     Procedure TestFormat;
     Procedure TestFormatNil;
     Procedure TestFind;
+    Procedure TestIfFind;
   end;
 
   { TTestJSONPath }
@@ -3553,6 +3554,28 @@ begin
   end;
 end;
 
+Procedure TTestObject.TestIfFind;
+Var
+  J: TJSONObject;
+  B: TJSONBoolean;
+  S: TJSONString;
+  N: TJSONNumber;
+  D: TJSONData;
+begin
+  J:=TJSONObject.Create(['s', 'astring', 'b', true, 'n', 1]);
+  try
+    TestJSONType(J,jtObject);
+    TestIsNull(J,False);
+    TestItemCount(J,3);
+    AssertEquals('boolean found', true, j.Find('b', B));
+    AssertEquals('string found', true, j.Find('s', S));
+    AssertEquals('number found', true, j.Find('n', N));
+    AssertEquals('data found', true, j.Find('s', D));
+  finally
+    FreeAndNil(J);
+  end;
+end;
+
 
 procedure TTestObject.TestCreateString;