#218: Made Email serializable (except for attached/embedded DataSources, which is out of our control)

Author: Benny Bottema

src/main/java/org/simplejavamail/email/AttachmentResource.java

@@ -6,6 +6,7 @@
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import java.io.IOException;
+import java.io.Serializable;
 import java.nio.charset.Charset;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
@@ -17,7 +18,7 @@
  *
  * @see DataSource
  */
-public class AttachmentResource {
+public class AttachmentResource implements Serializable {
 
 	/**
 	 * @see #AttachmentResource(String, DataSource)

src/main/java/org/simplejavamail/email/Email.java

@@ -5,6 +5,7 @@
 import javax.mail.internet.MimeMessage;
 import java.io.File;
 import java.io.InputStream;
+import java.io.Serializable;
 import java.util.List;
 import java.util.Map;
 
@@ -17,7 +18,7 @@
  * Email message with all necessary data for an effective mailing action, including attachments etc. Exclusively created using {@link EmailBuilder}.
  */
 @SuppressWarnings("SameParameterValue")
-public class Email {
+public class Email implements Serializable {
 
 	/**
 	 * @see EmailPopulatingBuilder#fixingMessageId(String)

src/main/java/org/simplejavamail/email/Recipient.java

@@ -3,14 +3,15 @@
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import javax.mail.Message.RecipientType;
+import java.io.Serializable;
 import java.util.Objects;
 
 import static org.simplejavamail.internal.util.Preconditions.checkNonEmptyArgument;
 
 /**
  * An immutable recipient object, with a name, emailaddress and recipient type (eg {@link RecipientType#BCC}).
  */
-public final class Recipient {
+public final class Recipient implements Serializable {
 
 	@Nullable
 	private final String name;

src/test/java/org/simplejavamail/email/EmailTest.java

@@ -0,0 +1,33 @@
+package org.simplejavamail.email;
+
+import org.junit.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectOutputStream;
+import java.io.OutputStream;
+
+public class EmailTest {
+
+	@Test
+	public void testSerialization() throws IOException {
+		Email e = EmailBuilder.startingBlank()
+				.from("lollypop", "[email protected]")
+				.withReplyTo("lollypop-reply", "[email protected]")
+				.withBounceTo("lollypop-bounce", "[email protected]")
+				.to("C.Cane", "[email protected]")
+				.withPlainText("We should meet up!")
+				.withHTMLText("<b>We should meet up!</b><img src='cid:thumbsup'>")
+				.withSubject("hey")
+				.withDispositionNotificationTo("[email protected]")
+				.withReturnReceiptTo("Complex Email", "[email protected]")
+				.withHeader("dummyHeader", "dummyHeaderValue")
+				.buildEmail();
+
+		OutputStream fileOut = new ByteArrayOutputStream();
+		ObjectOutputStream out = new ObjectOutputStream(fileOut);
+		out.writeObject(e);
+		out.close();
+		fileOut.close();
+	}
+}