JAVA-2296: Support Decimal128 in BasicBSONEncoder for the legacy API.

Note that Decimal128 is NOT supported by BasicBSONDecoder, as that would required the addition of a method to the public intervace BSONCallback.

Author: jyemin

driver/src/main/org/bson/BasicBSONEncoder.java

@@ -23,6 +23,7 @@
 import org.bson.types.Binary;
 import org.bson.types.Code;
 import org.bson.types.CodeWScope;
+import org.bson.types.Decimal128;
 import org.bson.types.MaxKey;
 import org.bson.types.MinKey;
 import org.bson.types.ObjectId;
@@ -155,6 +156,8 @@ protected void _putObjectField(final String name, final Object initialValue) {
             putDate(name, (Date) value);
         } else if (value instanceof Number) {
             putNumber(name, (Number) value);
+        } else if (value instanceof Decimal128) {
+            putDecimal128(name, (Decimal128) value);
         } else if (value instanceof Character) {
             putString(name, value.toString());
         } else if (value instanceof String) {
@@ -307,6 +310,19 @@ protected void putNumber(final String name, final Number number) {
         }
     }
 
+    /**
+     * Encodes a Decimal128 field.
+     *
+     * @param name   the field name
+     * @param value the value
+     * @since 3.4
+     * @mongodb.server.release 3.4
+     */
+    protected void putDecimal128(final String name, final Decimal128 value) {
+        putName(name);
+        bsonWriter.writeDecimal128(value);
+    }
+
     /**
      * Encodes a byte array field
      *

driver/src/test/unit/org/bson/BasicBSONEncoderSpecification.groovy

@@ -24,6 +24,7 @@ import org.bson.types.BasicBSONList
 import org.bson.types.Binary
 import org.bson.types.Code
 import org.bson.types.CodeWScope
+import org.bson.types.Decimal128
 import org.bson.types.MaxKey
 import org.bson.types.MinKey
 import org.bson.types.ObjectId
@@ -88,6 +89,7 @@ class BasicBSONEncoderSpecification extends Specification {
         ['i': Long.MAX_VALUE]                                    | [16, 0, 0, 0, 18, 105, 0, -1, -1, -1, -1, -1, -1, -1, 127, 0]
         ['k': new MinKey()]                                      | [8, 0, 0, 0, -1, 107, 0, 0]
         ['k': new MaxKey()]                                      | [8, 0, 0, 0, 127, 107, 0, 0]
+        ['f': Decimal128.parse('0E-6176')]                       | [24, 0, 0, 0, 19, 102, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
 
         aClass = document.find { true }.value.getClass()
     }