From d2a3e566b7814cfe176dd988854f6b3dca6a47d7 Mon Sep 17 00:00:00 2001
From: David Reiss <dreiss@apache.org>
Date: Sun, 2 Mar 2008 06:29:16 +0000
Subject: [PATCH] Add a TDeserializer for Java.

The class is the reverse of TSerializer.
It allows you to deserialize a Thrift struct from a byte array (or String).


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665540 13f79535-47bb-0310-9956-ffa450edef68
---
 lib/java/src/TDeserializer.java | 85 +++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 lib/java/src/TDeserializer.java

diff --git a/lib/java/src/TDeserializer.java b/lib/java/src/TDeserializer.java
new file mode 100644
index 00000000..f2a1ac28
--- /dev/null
+++ b/lib/java/src/TDeserializer.java
@@ -0,0 +1,85 @@
+// Copyright (c) 2006- Facebook
+// Distributed under the Thrift Software License
+//
+// See accompanying file LICENSE or visit the Thrift site at:
+// http://developers.facebook.com/thrift/
+
+package com.facebook.thrift;
+
+import java.io.ByteArrayInputStream;
+import java.io.UnsupportedEncodingException;
+
+import com.facebook.thrift.protocol.TBinaryProtocol;
+import com.facebook.thrift.protocol.TProtocol;
+import com.facebook.thrift.protocol.TProtocolFactory;
+import com.facebook.thrift.transport.TIOStreamTransport;
+import com.facebook.thrift.transport.TTransport;
+
+/**
+ * Generic utility for easily deserializing objects from a byte array or Java
+ * String.
+ *
+ * @author David Reiss <dreiss@facebook.com>
+ */
+public class TDeserializer {
+  private final TProtocolFactory protocolFactory_;
+
+  /**
+   * Create a new TDeserializer that uses the TBinaryProtocol by default.
+   */
+  public TDeserializer() {
+    this(new TBinaryProtocol.Factory());
+  }
+
+  /**
+   * Create a new TDeserializer. It will use the TProtocol specified by the
+   * factory that is passed in.
+   *
+   * @param protocolFactory Factory to create a protocol
+   */
+  public TDeserializer(TProtocolFactory protocolFactory) {
+    protocolFactory_ = protocolFactory;
+  }
+
+  /**
+   * Deserialize the Thrift object from a byte array.
+   *
+   * @param base The object to read into
+   * @param bytes The array to read from
+   */
+  public void deserialize(TBase base, byte[] bytes) throws TException {
+    base.read(
+        protocolFactory_.getProtocol(
+          new TIOStreamTransport(
+            new ByteArrayInputStream(bytes))));
+  }
+
+  /**
+   * Deserialize the Thrift object from a Java string, using a specified
+   * character set for decoding.
+   *
+   * @param base The object to read into
+   * @param data The string to read from
+   * @param charset Valid JVM charset
+   */
+  public void deserialize(TBase base, String data, String charset) throws TException {
+    try {
+      deserialize(base, data.getBytes(charset));
+    } catch (UnsupportedEncodingException uex) {
+      throw new TException("JVM DOES NOT SUPPORT ENCODING: " + charset);
+    }
+  }
+
+  /**
+   * Deerialize the Thrift object from a Java string, using the default JVM
+   * charset encoding.
+   *
+   * @param base The object to read into
+   * @param data The string to read from
+   * @return Serialized object as a String
+   */
+  public void toString(TBase base, String data) throws TException {
+    deserialize(base, data.getBytes());
+  }
+}
+
-- 
2.17.1