Added conformance test support for Java.
Change-Id: I4c81808e6ace77d2b5737a43417045321b0b10f0
diff --git a/conformance/ConformanceJava.java b/conformance/ConformanceJava.java
new file mode 100644
index 0000000..c1a5314
--- /dev/null
+++ b/conformance/ConformanceJava.java
@@ -0,0 +1,120 @@
+
+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().setRuntimeError("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.getRequestedOutput()) {
+ case UNSPECIFIED:
+ throw new RuntimeException("Unspecified output format.");
+
+ case PROTOBUF:
+ return Conformance.ConformanceResponse.newBuilder().setProtobufPayload(testMessage.toByteString()).build();
+
+ case JSON:
+ return Conformance.ConformanceResponse.newBuilder().setRuntimeError("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();
+ }
+}
