Examples : add example of jsonloader and remove existing conversion examples

- bug fixes in json saver done as well
- test covereage of jsonparser increased

Signed-off-by: Ujjwal Agarwal <ujjwalcoding012@gmail.com>

4 files changed, 63 insertions, 2 deletions

diff --git a/examples/10-jsonloader/example_json_loader.go b/examples/10-jsonloader/example_json_loader.go
new file mode 100644
index 0000000..96f47fd
--- /dev/null
+++ b/examples/10-jsonloader/example_json_loader.go
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+
+// Example for: *jsonparser2v2*
+
+// This example demonstrates loading an SPDX json from disk into memory,
+// and then logging out some attributes to the console .
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/spdx/tools-golang/jsonloader"
+)
+
+func main() {
+
+	// check that we've received the right number of arguments
+	args := os.Args
+	if len(args) != 3 {
+		fmt.Printf("Usage: %v <spdx-file-in> <spdx-file-out>\n", args[0])
+		fmt.Printf("  Load SPDX 2.2 tag-value file <spdx-file-in>, and\n")
+		fmt.Printf("  save it out to <spdx-file-out>.\n")
+		return
+	}
+
+	// open the SPDX file
+	fileIn := args[1]
+	r, err := os.Open(fileIn)
+	if err != nil {
+		fmt.Printf("Error while opening %v for reading: %v", fileIn, err)
+		return
+	}
+	defer r.Close()
+
+	// try to load the SPDX file's contents as a json file, version 2.2
+	doc, err := jsonloader.Load2_2(r)
+	if err != nil {
+		fmt.Printf("Error while parsing %v: %v", args[1], err)
+		return
+	}
+
+	// if we got here, the file is now loaded into memory.
+	fmt.Printf("Successfully loaded %s\n", args[1])
+
+	fmt.Println(strings.Repeat("=", 80))
+	fmt.Println("Some Attributes of the Document:")
+	fmt.Printf("Document Name:         %s\n", doc.CreationInfo.DocumentName)
+	fmt.Printf("DataLicense:           %s\n", doc.CreationInfo.DataLicense)
+	fmt.Printf("Document NameSpace:    %s\n", doc.CreationInfo.DocumentNamespace)
+	fmt.Printf("SPDX Document Version: %s\n", doc.CreationInfo.SPDXVersion)
+	fmt.Println(strings.Repeat("=", 80))
+}
diff --git a/examples/8-jsonloader/examplejsontotv.go b/examples/8-jsontotv/examplejsontotv.go
index ede044e..ede044e 100644
--- a/examples/8-jsonloader/examplejsontotv.go
+++ b/examples/8-jsontotv/examplejsontotv.go
diff --git a/examples/9-jsonsaver/exampletvtojson.go b/examples/9-tvtojson/exampletvtojson.go
index 2c6ec7e..2c6ec7e 100644
--- a/examples/9-jsonsaver/exampletvtojson.go
+++ b/examples/9-tvtojson/exampletvtojson.go
diff --git a/examples/README.md b/examples/README.md
index 5009adc..bd4b3d3 100644
--- a/examples/README.md
+++ b/examples/README.md
@@ -64,17 +64,23 @@ the same identifier in both documents.
 This example demonstrates loading an SPDX rdf file from disk into memory 
 and then printing the corresponding spdx struct for the document.
 
-## 8-jsonloader
+## 8-jsontotv
 
 *jsonloader*, *tvsaver*
 
 This example demonstrates loading an SPDX json from disk into memory
 and then re-saving it to a different file on disk in tag-value format.
 
-## 9-jsonsaver
+## 9-tvtojson
 
 *jsonsaver*, *tvloader*
 
 This example demonstrates loading an SPDX tag-value from disk into memory
 and then re-saving it to a different file on disk in json format.
 
+## 10-jsonloader
+
+*jsonloader*
+
+This example demonstrates loading an SPDX json from disk into memory
+and then logging some of the attributes to the console.