Revert https://codereview.chromium.org/1291903002 (protobuf roll).

third_party/protobuf/conformance/ConformanceJava.java

-
-import com.google.protobuf.conformance.Conformance;
-import com.google.protobuf.InvalidProtocolBufferException;
-
-class ConformanceJava {
-  private int testCount = 0;
-
-  private boolean readFromStdin(byte[] buf, int len) throws Exception {
-    int ofs = 0;
-    while (len > 0) {
-      int read = System.in.read(buf, ofs, len);
-      if (read == -1) {
-        return false;  // EOF
-      }
-      ofs += read;
-      len -= read;
-    }
-
-    return true;
-  }
-
-  private void writeToStdout(byte[] buf) throws Exception {
-    System.out.write(buf);
-  }
-
-  // Returns -1 on EOF (the actual values will always be positive).
-  private int readLittleEndianIntFromStdin() throws Exception {
-    byte[] buf = new byte[4];
-    if (!readFromStdin(buf, 4)) {
-      return -1;
-    }
-    return buf[0] | (buf[1] << 1) | (buf[2] << 2) | (buf[3] << 3);
-  }
-
-  private void writeLittleEndianIntToStdout(int val) throws Exception {
-    byte[] buf = new byte[4];
-    buf[0] = (byte)val;
-    buf[1] = (byte)(val >> 8);
-    buf[2] = (byte)(val >> 16);
-    buf[3] = (byte)(val >> 24);
-    writeToStdout(buf);
-  }
-
-  private Conformance.ConformanceResponse doTest(Conformance.ConformanceRequest request) {
-    Conformance.TestAllTypes testMessage;
-
-    switch (request.getPayloadCase()) {
-      case PROTOBUF_PAYLOAD: {
-        try {
-          testMessage = Conformance.TestAllTypes.parseFrom(request.getProtobufPayload());
-        } catch (InvalidProtocolBufferException e) {
-          return Conformance.ConformanceResponse.newBuilder().setParseError(e.getMessage()).build();
-        }
-        break;
-      }
-      case JSON_PAYLOAD: {
-        return Conformance.ConformanceResponse.newBuilder().setSkipped("JSON not yet supported.").build();
-      }
-      case PAYLOAD_NOT_SET: {
-        throw new RuntimeException("Request didn't have payload.");
-      }
-
-      default: {
-        throw new RuntimeException("Unexpected payload case.");
-      }
-    }
-
-    switch (request.getRequestedOutputFormat()) {
-      case UNSPECIFIED:
-        throw new RuntimeException("Unspecified output format.");
-
-      case PROTOBUF:
-        return Conformance.ConformanceResponse.newBuilder().setProtobufPayload(testMessage.toByteString()).build();
-
-      case JSON:
-        return Conformance.ConformanceResponse.newBuilder().setSkipped("JSON not yet supported.").build();
-
-      default: {
-        throw new RuntimeException("Unexpected request output.");
-      }
-    }
-  }
-
-  private boolean doTestIo() throws Exception {
-    int bytes = readLittleEndianIntFromStdin();
-
-    if (bytes == -1) {
-      return false;  // EOF
-    }
-
-    byte[] serializedInput = new byte[bytes];
-
-    if (!readFromStdin(serializedInput, bytes)) {
-      throw new RuntimeException("Unexpected EOF from test program.");
-    }
-
-    Conformance.ConformanceRequest request =
-        Conformance.ConformanceRequest.parseFrom(serializedInput);
-    Conformance.ConformanceResponse response = doTest(request);
-    byte[] serializedOutput = response.toByteArray();
-
-    writeLittleEndianIntToStdout(serializedOutput.length);
-    writeToStdout(serializedOutput);
-
-    return true;
-  }
-
-  public void run() throws Exception {
-    while (doTestIo()) {
-      // Empty.
-    }
-
-    System.err.println("ConformanceJava: received EOF from test runner after " +
-        this.testCount + " tests");
-  }
-
-  public static void main(String[] args) throws Exception {
-    new ConformanceJava().run();
-  }
-}