add JSON utility class

[moonshot.git] / mech_eap / util_json.h

diff --git a/mech_eap/util_json.h b/mech_eap/util_json.h
new file mode 100644 (file)
index 0000000..639e7b0
--- /dev/null
+++ b/mech_eap/util_json.h
@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 2011, JANET(UK)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of JANET(UK) nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * JSON object wrapper with toll-free DDF bridging.
+ */
+
+#ifndef _UTIL_JSON_H_
+#define _UTIL_JSON_H_ 1
+
+#ifdef __cplusplus
+#include <string>
+#include <new>
+
+#include <jansson.h>
+#include <shibsp/remoting/ddf.h>
+
+using namespace shibsp;
+
+namespace gss_eap {
+    class JSONObject;
+
+    class JSONIterator {
+    public:
+        JSONIterator(const JSONObject &obj);
+        ~JSONIterator(void);
+        const char *key(void) const;
+        JSONObject value(void) const;
+        bool next(void);
+
+    private:
+        json_t *m_obj;
+        void *m_iter;
+    };
+
+    class JSONObject {
+    public:
+        static JSONObject load(const char *input, size_t flags, json_error_t *error);
+        static JSONObject load(FILE *, size_t flags, json_error_t *error);
+
+        static JSONObject object(void);
+        static JSONObject array(void);
+        static JSONObject null(void);
+
+        char *dump(size_t flags = 0) const;
+        void dump(FILE *fp, size_t flags = 0) const;
+
+        json_type type(void) const { return json_typeof(m_obj); }
+        size_t size(void) const;
+
+        JSONObject(void);
+        JSONObject(DDF &value);
+        JSONObject(const char *value);
+        JSONObject(json_int_t value);
+        JSONObject(double value);
+        JSONObject(bool value);
+
+        void set(const char *key, JSONObject &value);
+        void set(const char *key, const char *value);
+        void set(const char *key, json_int_t value);
+        void del(const char *key);
+        void update(JSONObject &value);
+        JSONIterator iterator(void) const { return JSONIterator(*this); }
+        JSONObject get(const char *key) const;
+        JSONObject operator[](const char *key) const;
+
+        JSONObject get(size_t index) const;
+        JSONObject operator[](size_t index) const;
+        void append(JSONObject &value);
+        void insert(size_t index, JSONObject &value);
+        void remove(size_t index);
+        void clear(void);
+        void extend(JSONObject &value);
+
+        const char *string(void) const;
+        json_int_t integer(void) const;
+        double real(void) const;
+        double number(void) const;
+        bool isnull(void) const;
+        DDF ddf(void) const;
+
+        ~JSONObject(void)
+        {
+            if (m_obj != NULL)
+                json_decref(m_obj);
+        }
+
+        JSONObject(const JSONObject &obj)
+        {
+            m_obj = json_incref(obj.m_obj);
+        }
+
+        JSONObject& operator=(const JSONObject &obj)
+        {
+            if (this != &obj)
+                set(obj.m_obj);
+            return *this;
+        }
+
+    private:
+        friend class JSONIterator;
+
+        json_t *get(void) const {
+            return m_obj ? json_incref(m_obj) : json_null();
+        }
+
+        void set(json_t *obj) {
+            if (m_obj != obj) {
+                json_decref(m_obj);
+                m_obj = json_incref(m_obj);
+            }
+        }
+
+        JSONObject(json_t *obj, bool retain);
+
+        json_t *m_obj;
+    };
+
+}
+
+#endif /* __cplusplus */
+
+#endif /* _UTIL_JSON_H_ */