Paul Duffin | 7fc0b45 | 2015-11-10 17:45:15 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2010 Google Inc. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.google.caliper; |
| 18 | |
| 19 | import com.google.gson.JsonParseException; |
| 20 | |
| 21 | import java.io.ByteArrayInputStream; |
| 22 | import java.io.ByteArrayOutputStream; |
| 23 | import java.io.IOException; |
| 24 | import java.io.InputStream; |
| 25 | import java.io.InputStreamReader; |
| 26 | |
| 27 | /** |
| 28 | * Helps with deserialization of results, given uncertainty about the format (xml or json) they |
| 29 | * are in. |
| 30 | */ |
| 31 | public final class ResultsReader { |
| 32 | public Result getResult(InputStream in) throws IOException { |
| 33 | // save input into a byte array since we may need to read it twice |
| 34 | byte[] postedData = readAllBytes(in); |
| 35 | Result result; |
| 36 | InputStreamReader baisJsonReader = new InputStreamReader(new ByteArrayInputStream(postedData)); |
| 37 | try { |
| 38 | result = Json.getGsonInstance().fromJson(baisJsonReader, Result.class); |
| 39 | } catch (JsonParseException e) { |
| 40 | // probably an old client is trying to send data, so try to parse it as XML instead. |
| 41 | ByteArrayInputStream baisXml = new ByteArrayInputStream(postedData); |
| 42 | try { |
| 43 | result = Xml.resultFromXml(baisXml); |
| 44 | } catch (Exception e2) { |
| 45 | throw new RuntimeException(e); |
| 46 | } finally { |
| 47 | baisXml.close(); |
| 48 | } |
| 49 | } finally { |
| 50 | baisJsonReader.close(); |
| 51 | } |
| 52 | return result; |
| 53 | } |
| 54 | |
| 55 | private byte[] readAllBytes(InputStream in) throws IOException { |
| 56 | ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| 57 | byte[] buf = new byte[4096]; |
| 58 | int read; |
| 59 | while ((read = in.read(buf)) != -1) { |
| 60 | baos.write(buf, 0, read); |
| 61 | } |
| 62 | return baos.toByteArray(); |
| 63 | } |
| 64 | } |