1 files changed, 64 insertions, 0 deletions
diff --git a/caliper/src/main/java/com/google/caliper/ResultsReader.java b/caliper/src/main/java/com/google/caliper/ResultsReader.java
new file mode 100644
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--- /dev/null
+++ b/caliper/src/main/java/com/google/caliper/ResultsReader.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * 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.google.caliper;
+
+import com.google.gson.JsonParseException;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+
+/**
+ * Helps with deserialization of results, given uncertainty about the format (xml or json) they
+ * are in.
+ */
+public final class ResultsReader {
+  public Result getResult(InputStream in) throws IOException {
+    // save input into a byte array since we may need to read it twice
+    byte[] postedData = readAllBytes(in);
+    Result result;
+    InputStreamReader baisJsonReader = new InputStreamReader(new ByteArrayInputStream(postedData));
+    try {
+      result = Json.getGsonInstance().fromJson(baisJsonReader, Result.class);
+    } catch (JsonParseException e) {
+      // probably an old client is trying to send data, so try to parse it as XML instead.
+      ByteArrayInputStream baisXml = new ByteArrayInputStream(postedData);
+      try {
+        result = Xml.resultFromXml(baisXml);
+      } catch (Exception e2) {
+        throw new RuntimeException(e);
+      } finally {
+        baisXml.close();
+      }
+    } finally {
+      baisJsonReader.close();
+    }
+    return result;
+  }
+
+  private byte[] readAllBytes(InputStream in) throws IOException {
+    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+    byte[] buf = new byte[4096];
+    int read;
+    while ((read = in.read(buf)) != -1) {
+      baos.write(buf, 0, read);
+    }
+    return baos.toByteArray();
+  }
+}