Merge pull request #19 from RIT-SWEN-262/import-export

Import export

4 files changed, 100 insertions, 0 deletions

diff --git a/src/main/java/design/persistence/importexport/DataHandler.java b/src/main/java/design/persistence/importexport/DataHandler.java
new file mode 100644
index 0000000..59df9be
--- /dev/null
+++ b/src/main/java/design/persistence/importexport/DataHandler.java
@@ -0,0 +1,11 @@
+package design.persistence.importexport;
+
+import java.io.File;
+import java.io.IOException;
+
+public interface DataHandler {
+
+    void importData(File file) throws IOException;
+
+    void exportData(File file) throws IOException;
+}
diff --git a/src/main/java/design/persistence/importexport/DataSource.java b/src/main/java/design/persistence/importexport/DataSource.java
new file mode 100644
index 0000000..e735c7e
--- /dev/null
+++ b/src/main/java/design/persistence/importexport/DataSource.java
@@ -0,0 +1,16 @@
+package design.persistence.importexport;
+
+import com.fasterxml.jackson.databind.module.SimpleModule;
+
+import java.io.IOException;
+
+public interface DataSource {
+
+    void importData(Object data) throws IOException;
+
+    Object exportData() throws IOException;
+
+    SimpleModule getJacksonModule();
+
+    Class<?> getTargetClass();
+}
\ No newline at end of file
diff --git a/src/main/java/design/persistence/importexport/JSONHandler.java b/src/main/java/design/persistence/importexport/JSONHandler.java
new file mode 100644
index 0000000..9c04281
--- /dev/null
+++ b/src/main/java/design/persistence/importexport/JSONHandler.java
@@ -0,0 +1,35 @@
+package design.persistence.importexport;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.json.JsonMapper;
+import design.persistence.Serializers;
+
+import java.io.File;
+import java.io.IOException;
+
+public class JSONHandler implements DataHandler {
+
+    private final DataSource dataSource;
+    private final ObjectMapper jsonMapper = new JsonMapper();
+
+    public JSONHandler(DataSource dataSource) {
+        this.dataSource = dataSource;
+
+        Serializers.configureMapper(jsonMapper);
+        jsonMapper.registerModule(dataSource.getJacksonModule());
+    }
+
+    @Override
+    public void importData(File file) throws IOException {
+        Object data = jsonMapper.readValue(file, dataSource.getTargetClass());
+        dataSource.importData(data);
+    }
+
+    @Override
+    public void exportData(File file) throws IOException{
+        Object data = dataSource.exportData();
+        jsonMapper.writer(new Serializers.CustomPrettyPrinter())
+                .writeValue(file, data);
+    }
+}
+
+
diff --git a/src/main/java/design/persistence/importexport/XMLHandler.java b/src/main/java/design/persistence/importexport/XMLHandler.java
new file mode 100644
index 0000000..0a07d6e
--- /dev/null
+++ b/src/main/java/design/persistence/importexport/XMLHandler.java
@@ -0,0 +1,38 @@
+package design.persistence.importexport;
+import java.io.File;
+import java.io.IOException;
+import java.time.LocalDateTime;
+
+import com.fasterxml.jackson.databind.module.SimpleModule;
+import com.fasterxml.jackson.dataformat.xml.XmlMapper;
+import design.persistence.Serializers;
+
+public class XMLHandler implements DataHandler {
+
+    private final DataSource dataSource;
+    private final XmlMapper xmlMapper = new XmlMapper();
+
+    public XMLHandler(DataSource dataSource) {
+        this.dataSource = dataSource;
+
+        Serializers.configureMapper(xmlMapper);
+        SimpleModule module = dataSource.getJacksonModule();
+        module.addSerializer(LocalDateTime.class, new Serializers.DateTimeStringSerializer());
+        xmlMapper.registerModule(module);
+    }
+
+    @Override
+    public void importData(File file) throws IOException {
+        Object data = xmlMapper.readValue(file, dataSource.getTargetClass());
+        dataSource.importData(data);
+    }
+
+    @Override
+    public void exportData(File file) throws IOException {
+        Object data = dataSource.exportData();
+        xmlMapper.writerWithDefaultPrettyPrinter()
+                .writeValue(file, data);
+    }
+}
+
+