Merge pull request #105 from geniejhang/vtype-gson

Gson de/serializer for vtype

Author: georgweiss

epics-vtype/pom.xml

@@ -17,6 +17,7 @@
     <modules>
         <module>vtype</module>
         <module>vtype-json</module>
+        <module>vtype-gson</module>
     </modules>
     <build>
         <!-- Reset to standard source directories -->

epics-vtype/vtype-gson/pom.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion><build><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><configuration><source>8</source><target>8</target></configuration></plugin></plugins></build>
+    <parent>
+        <groupId>org.epics</groupId>
+        <artifactId>epics-vtype-all</artifactId>
+        <version>1.0.4-SNAPSHOT</version>
+    </parent>
+    <artifactId>vtype-gson</artifactId>
+    <name>org.epics.vtype.gson</name>
+    <description>Google GSON de/serializer for value types.</description>
+    <dependencies>
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>vtype</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>2.8.6</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.ws.rs</groupId>
+            <artifactId>javax.ws.rs-api</artifactId>
+            <version>2.1</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+</project>

epics-vtype/vtype-gson/src/main/java/org/epics/vtype/gson/CustomGson.java

@@ -0,0 +1,47 @@
+/**
+ * Copyright (C) 2020 Facility for Rare Isotope Beams
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * Contact Information: Facility for Rare Isotope Beam,
+ *                      Michigan State University,
+ *                      East Lansing, MI 48824-1321
+ *                      http://frib.msu.edu
+ */
+package org.epics.vtype.gson;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import org.epics.vtype.VType;
+
+import java.text.DecimalFormat;
+import java.util.Date;
+
+/**
+ * Custom Gson object creator having some TypeAdapters and options
+ *
+ * @author <a href="mailto:changj@frib.msu.edu">Genie Jhang</a>
+ */
+
+public class CustomGson {
+    public static Gson getGson() {
+        return new GsonBuilder()
+                .registerTypeAdapter(VType.class, new GsonVTypeHandler())
+                .registerTypeAdapter(Date.class, new GsonDateHandler())
+                .registerTypeAdapter(DecimalFormat.class, new GsonDecimalFormatHandler())
+                .serializeNulls()
+                .serializeSpecialFloatingPointValues()
+                .create();
+    }
+}