1 files changed, 98 insertions, 0 deletions
diff --git a/src/jaegertracing/thrift/lib/java/src/org/apache/thrift/protocol/TTupleProtocol.java b/src/jaegertracing/thrift/lib/java/src/org/apache/thrift/protocol/TTupleProtocol.java
new file mode 100644
index 000000000..74f5226c8
--- /dev/null
+++ b/src/jaegertracing/thrift/lib/java/src/org/apache/thrift/protocol/TTupleProtocol.java
@@ -0,0 +1,98 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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 org.apache.thrift.protocol;
+
+import java.util.BitSet;
+
+import org.apache.thrift.TException;
+import org.apache.thrift.scheme.IScheme;
+import org.apache.thrift.scheme.TupleScheme;
+import org.apache.thrift.transport.TTransport;
+
+public final class TTupleProtocol extends TCompactProtocol {
+  public static class Factory implements TProtocolFactory {
+    public Factory() {}
+
+    public TProtocol getProtocol(TTransport trans) {
+      return new TTupleProtocol(trans);
+    }
+  }
+
+  public TTupleProtocol(TTransport transport) {
+    super(transport);
+  }
+
+  @Override
+  public Class<? extends IScheme> getScheme() {
+    return TupleScheme.class;
+  }
+
+  public void writeBitSet(BitSet bs, int vectorWidth) throws TException {
+    byte[] bytes = toByteArray(bs, vectorWidth);
+    for (byte b : bytes) {
+      writeByte(b);
+    }
+  }
+
+  public BitSet readBitSet(int i) throws TException {
+    int length = (int) Math.ceil(i/8.0);
+    byte[] bytes = new byte[length];
+    for (int j = 0; j < length; j++) {
+      bytes[j] = readByte();
+    }
+    BitSet bs = fromByteArray(bytes);
+    return bs;
+  }
+
+  /**
+   * Returns a bitset containing the values in bytes. The byte-ordering must be
+   * big-endian.
+   */
+  public static BitSet fromByteArray(byte[] bytes) {
+    BitSet bits = new BitSet();
+    for (int i = 0; i < bytes.length * 8; i++) {
+      if ((bytes[bytes.length - i / 8 - 1] & (1 << (i % 8))) > 0) {
+        bits.set(i);
+      }
+    }
+    return bits;
+  }
+
+  /**
+   * Returns a byte array of at least length 1. The most significant bit in the
+   * result is guaranteed not to be a 1 (since BitSet does not support sign
+   * extension). The byte-ordering of the result is big-endian which means the
+   * most significant bit is in element 0. The bit at index 0 of the bit set is
+   * assumed to be the least significant bit.
+   * 
+   * @param bits
+   * @param vectorWidth 
+   * @return a byte array of at least length 1
+   */
+  public static byte[] toByteArray(BitSet bits, int vectorWidth) {
+    byte[] bytes = new byte[(int) Math.ceil(vectorWidth/8.0)];
+    for (int i = 0; i < bits.length(); i++) {
+      if (bits.get(i)) {
+        bytes[bytes.length - i / 8 - 1] |= 1 << (i % 8);
+      }
+    }
+    return bytes;
+  }
+
+}