From 54d9fd61e13f7369c831ab76503f7619d60c0cfd Mon Sep 17 00:00:00 2001
From: Liang Qi <liang.qi@nokia.com>
Date: Tue, 20 Mar 2012 07:07:03 +0100
Subject: Add default value for getters in QJsonValue

Done-with: Debao Zhang <dbzhang800@gmail.com>
Change-Id: I3ddd8dd89dc75d91ac9977bf9b6eb3174d7669e4
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
---
 src/corelib/json/qjsonvalue.cpp | 54 +++++++++++++++++++++++++++++------------
 src/corelib/json/qjsonvalue.h   |  8 +++---
 2 files changed, 44 insertions(+), 18 deletions(-)

(limited to 'src')

diff --git a/src/corelib/json/qjsonvalue.cpp b/src/corelib/json/qjsonvalue.cpp
index e25aac50f2..3be7089049 100644
--- a/src/corelib/json/qjsonvalue.cpp
+++ b/src/corelib/json/qjsonvalue.cpp
@@ -369,36 +369,36 @@ QJsonValue::Type QJsonValue::type() const
 /*!
     Converts the value to a bool and returns it.
 
-    If type() is not bool, false will be returned.
+    If type() is not bool, the defaultValue will be returned.
  */
-bool QJsonValue::toBool() const
+bool QJsonValue::toBool(bool defaultValue) const
 {
     if (t != Bool)
-        return false;
+        return defaultValue;
     return b;
 }
 
 /*!
     Converts the value to a double and returns it.
 
-    If type() is not Double, 0. will be returned.
+    If type() is not Double, the defaultValue will be returned.
  */
-double QJsonValue::toDouble() const
+double QJsonValue::toDouble(double defaultValue) const
 {
     if (t != Double)
-        return 0;
+        return defaultValue;
     return dbl;
 }
 
 /*!
     Converts the value to a QString and returns it.
 
-    If type() is not String, a QString() will be returned.
+    If type() is not String, the defaultValue will be returned.
  */
-QString QJsonValue::toString() const
+QString QJsonValue::toString(const QString &defaultValue) const
 {
     if (t != String)
-        return QString();
+        return defaultValue;
     stringData->ref.ref(); // the constructor below doesn't add a ref.
     QStringDataPtr holder = { stringData };
     return QString(holder);
@@ -407,29 +407,53 @@ QString QJsonValue::toString() const
 /*!
     Converts the value to an array and returns it.
 
-    If type() is not Array, a QJsonArray() will be returned.
+    If type() is not Array, the defaultValue will be returned.
  */
-QJsonArray QJsonValue::toArray() const
+QJsonArray QJsonValue::toArray(const QJsonArray &defaultValue) const
 {
     if (!d || t != Array)
-        return QJsonArray();
+        return defaultValue;
 
     return QJsonArray(d, static_cast<QJsonPrivate::Array *>(base));
 }
 
+/*!
+    \overload
+
+    Converts the value to an array and returns it.
+
+    If type() is not Array, a QJsonArray() will be returned.
+ */
+QJsonArray QJsonValue::toArray() const
+{
+    return toArray(QJsonArray());
+}
+
 /*!
     Converts the value to an object and returns it.
 
-    If type() is not Object, a QJsonObject() will be returned.
+    If type() is not Object, the defaultValue will be returned.
  */
-QJsonObject QJsonValue::toObject() const
+QJsonObject QJsonValue::toObject(const QJsonObject &defaultValue) const
 {
     if (!d || t != Object)
-        return QJsonObject();
+        return defaultValue;
 
     return QJsonObject(d, static_cast<QJsonPrivate::Object *>(base));
 }
 
+/*!
+    \overload
+
+    Converts the value to an object and returns it.
+
+    If type() is not Object, the QJsonObject() will be returned.
+ */
+QJsonObject QJsonValue::toObject() const
+{
+    return toObject(QJsonObject());
+}
+
 /*!
     Returns true if the value is equal to \a other.
  */
diff --git a/src/corelib/json/qjsonvalue.h b/src/corelib/json/qjsonvalue.h
index 69dcc0640a..386bee25a4 100644
--- a/src/corelib/json/qjsonvalue.h
+++ b/src/corelib/json/qjsonvalue.h
@@ -103,11 +103,13 @@ public:
     inline bool isObject() const { return type() == Object; }
     inline bool isUndefined() const { return type() == Undefined; }
 
-    bool toBool() const;
-    double toDouble() const;
-    QString toString() const;
+    bool toBool(bool defaultValue = false) const;
+    double toDouble(double defaultValue = 0) const;
+    QString toString(const QString &defaultValue = QString()) const;
     QJsonArray toArray() const;
+    QJsonArray toArray(const QJsonArray &defaultValue) const;
     QJsonObject toObject() const;
+    QJsonObject toObject(const QJsonObject &defaultValue) const;
 
     bool operator==(const QJsonValue &other) const;
     bool operator!=(const QJsonValue &other) const;
-- 
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