1 files changed, 66 insertions, 0 deletions
diff --git a/security/AsymmetricFingerprintDialog/Application/src/main/java/com/example/android/asymmetricfingerprintdialog/server/Transaction.java b/security/AsymmetricFingerprintDialog/Application/src/main/java/com/example/android/asymmetricfingerprintdialog/server/Transaction.java
new file mode 100644
index 00000000..33b65ef8
--- /dev/null
+++ b/security/AsymmetricFingerprintDialog/Application/src/main/java/com/example/android/asymmetricfingerprintdialog/server/Transaction.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.example.android.asymmetricfingerprintdialog.server;
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+/**
+ * An entity that represents a single transaction (purchase) of an item.
+ */
+public class Transaction {
+
+    /** The unique ID of the item of the purchase */
+    private final Long mItemId;
+
+    /** The unique user ID who made the transaction */
+    private final String mUserId;
+
+    public Transaction(String userId, long itemId) {
+        mItemId = itemId;
+        mUserId = userId;
+    }
+
+    public String getUserId() {
+        return mUserId;
+    }
+
+    public byte[] toByteArray() {
+        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+        DataOutputStream dataOutputStream = null;
+        try {
+            dataOutputStream = new DataOutputStream(byteArrayOutputStream);
+            dataOutputStream.writeLong(mItemId);
+            dataOutputStream.writeUTF(mUserId);
+            return byteArrayOutputStream.toByteArray();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        } finally {
+            try {
+                if (dataOutputStream != null) {
+                    dataOutputStream.close();
+                }
+            } catch (IOException ignore) {
+            }
+            try {
+                byteArrayOutputStream.close();
+            } catch (IOException ignore) {
+            }
+        }
+    }
+}