Update for Dart 2.x constants (#4842)

dart/lib/flat_buffers.dart

@@ -44,30 +44,30 @@ class BufferContext {
       _buffer.buffer.asUint8List(_buffer.offsetInBytes + offset, length);
 
   double _getFloat64(int offset) =>
-      _buffer.getFloat64(offset, Endianness.LITTLE_ENDIAN);
+      _buffer.getFloat64(offset, Endian.little);
 
   double _getFloat32(int offset) =>
-      _buffer.getFloat32(offset, Endianness.LITTLE_ENDIAN);
+      _buffer.getFloat32(offset, Endian.little);
 
   int _getInt64(int offset) =>
-      _buffer.getInt64(offset, Endianness.LITTLE_ENDIAN);
+      _buffer.getInt64(offset, Endian.little);
 
   int _getInt32(int offset) =>
-      _buffer.getInt32(offset, Endianness.LITTLE_ENDIAN);
+      _buffer.getInt32(offset, Endian.little);
 
   int _getInt16(int offset) =>
-      _buffer.getInt16(offset, Endianness.LITTLE_ENDIAN);
+      _buffer.getInt16(offset, Endian.little);
 
   int _getInt8(int offset) => _buffer.getInt8(offset);
 
   int _getUint64(int offset) =>
-      _buffer.getUint64(offset, Endianness.LITTLE_ENDIAN);
+      _buffer.getUint64(offset, Endian.little);
 
   int _getUint32(int offset) =>
-      _buffer.getUint32(offset, Endianness.LITTLE_ENDIAN);
+      _buffer.getUint32(offset, Endian.little);
 
   int _getUint16(int offset) =>
-      _buffer.getUint16(offset, Endianness.LITTLE_ENDIAN);
+      _buffer.getUint16(offset, Endian.little);
 
   int _getUint8(int offset) => _buffer.getUint8(offset);
 
@@ -306,7 +306,7 @@ class Builder {
       for (int i = _vTables.length - 1; i >= 0; i--) {
         final int vt2Offset = _vTables[i];
         final int vt2Start = _buf.lengthInBytes - vt2Offset;
-        final int vt2Size = _buf.getUint16(vt2Start, Endianness.LITTLE_ENDIAN);
+        final int vt2Size = _buf.getUint16(vt2Start, Endian.little);
 
         if (_currentVTable._vTableSize == vt2Size &&
             _currentVTable._offsetsMatch(vt2Start, _buf)) {
@@ -660,7 +660,7 @@ class Builder {
 
   int _writeString(String value) {
     // TODO(scheglov) optimize for ASCII strings
-    List<int> bytes = UTF8.encode(value);
+    List<int> bytes = utf8.encode(value);
     int length = bytes.length;
     _prepare(4, 1, additionalBytes: length);
     final int result = _tail;
@@ -733,35 +733,35 @@ class Builder {
   }
 
   static void _setFloat64AtTail(ByteData _buf, int tail, double x) {
-    _buf.setFloat64(_buf.lengthInBytes - tail, x, Endianness.LITTLE_ENDIAN);
+    _buf.setFloat64(_buf.lengthInBytes - tail, x, Endian.little);
   }
 
   static void _setFloat32AtTail(ByteData _buf, int tail, double x) {
-    _buf.setFloat32(_buf.lengthInBytes - tail, x, Endianness.LITTLE_ENDIAN);
+    _buf.setFloat32(_buf.lengthInBytes - tail, x, Endian.little);
   }
 
   static void _setUint64AtTail(ByteData _buf, int tail, int x) {
-    _buf.setUint64(_buf.lengthInBytes - tail, x, Endianness.LITTLE_ENDIAN);
+    _buf.setUint64(_buf.lengthInBytes - tail, x, Endian.little);
   }
 
   static void _setInt64AtTail(ByteData _buf, int tail, int x) {
-    _buf.setInt64(_buf.lengthInBytes - tail, x, Endianness.LITTLE_ENDIAN);
+    _buf.setInt64(_buf.lengthInBytes - tail, x, Endian.little);
   }
 
   static void _setInt32AtTail(ByteData _buf, int tail, int x) {
-    _buf.setInt32(_buf.lengthInBytes - tail, x, Endianness.LITTLE_ENDIAN);
+    _buf.setInt32(_buf.lengthInBytes - tail, x, Endian.little);
   }
 
   static void _setUint32AtTail(ByteData _buf, int tail, int x) {
-    _buf.setUint32(_buf.lengthInBytes - tail, x, Endianness.LITTLE_ENDIAN);
+    _buf.setUint32(_buf.lengthInBytes - tail, x, Endian.little);
   }
 
   static void _setInt16AtTail(ByteData _buf, int tail, int x) {
-    _buf.setInt16(_buf.lengthInBytes - tail, x, Endianness.LITTLE_ENDIAN);
+    _buf.setInt16(_buf.lengthInBytes - tail, x, Endian.little);
   }
 
   static void _setUint16AtTail(ByteData _buf, int tail, int x) {
-    _buf.setUint16(_buf.lengthInBytes - tail, x, Endianness.LITTLE_ENDIAN);
+    _buf.setUint16(_buf.lengthInBytes - tail, x, Endian.little);
   }
 
   static void _setInt8AtTail(ByteData _buf, int tail, int x) {
@@ -943,7 +943,7 @@ class StringReader extends Reader<String> {
     if (_isLatin(bytes)) {
       return new String.fromCharCodes(bytes);
     }
-    return UTF8.decode(bytes);
+    return utf8.decode(bytes);
   }
 
   static bool _isLatin(Uint8List bytes) {
@@ -1207,7 +1207,7 @@ class _VTable {
     for (int i = 0; i < fieldOffsets.length; i++) {
       if (fieldOffsets[i] !=
           buf.getUint16(
-              vt2Start + _metadataLength + (2 * i), Endianness.LITTLE_ENDIAN)) {
+              vt2Start + _metadataLength + (2 * i), Endian.little)) {
         return false;
       }
     }
@@ -1227,14 +1227,14 @@ class _VTable {
   /// and have at least [numOfUint16] 16-bit words available.
   void output(ByteData buf, int bufOffset) {
     // VTable size.
-    buf.setUint16(bufOffset, numOfUint16 * 2, Endianness.LITTLE_ENDIAN);
+    buf.setUint16(bufOffset, numOfUint16 * 2, Endian.little);
     bufOffset += 2;
     // Table size.
-    buf.setUint16(bufOffset, tableSize, Endianness.LITTLE_ENDIAN);
+    buf.setUint16(bufOffset, tableSize, Endian.little);
     bufOffset += 2;
     // Field offsets.
     for (int fieldOffset in fieldOffsets) {
-      buf.setUint16(bufOffset, fieldOffset, Endianness.LITTLE_ENDIAN);
+      buf.setUint16(bufOffset, fieldOffset, Endian.little);
       bufOffset += 2;
     }
   }

dart/pubspec.yaml

 name: flat_buffers
-version: 1.9.0
+version: 1.9.1
 description: >
   FlatBuffers reading and writing library for Dart.  Use the flatc compiler to
   generate Dart classes for a FlatBuffers schema, and this library to assist with
@@ -16,3 +16,5 @@ dev_dependencies:
   test: ^0.12.33
   test_reflective_loader: ^0.1.4
   path: ^1.5.1
+environment:
+  sdk: '>=2.0.0-dev.28.0 <3.0.0'
\ No newline at end of file

dart/test/flat_buffers_test.dart

@@ -160,7 +160,7 @@ class BuilderTest {
     // Convert byteList to a ByteData so that we can read data from it.
     ByteData byteData = byteList.buffer.asByteData(byteList.offsetInBytes);
     // First 4 bytes are an offset to the table data.
-    int tableDataLoc = byteData.getUint32(0, Endianness.LITTLE_ENDIAN);
+    int tableDataLoc = byteData.getUint32(0, Endian.little);
     // Next 4 bytes are the file identifier.
     expect(byteData.getUint8(4), 65); // 'a'
     expect(byteData.getUint8(5), 122); // 'z'
@@ -168,13 +168,13 @@ class BuilderTest {
     expect(byteData.getUint8(7), 255); // 'ÿ'
     // First 4 bytes of the table data are a backwards offset to the vtable.
     int vTableLoc = tableDataLoc -
-        byteData.getInt32(tableDataLoc, Endianness.LITTLE_ENDIAN);
+        byteData.getInt32(tableDataLoc, Endian.little);
     // First 2 bytes of the vtable are the size of the vtable in bytes, which
     // should be 4.
-    expect(byteData.getUint16(vTableLoc, Endianness.LITTLE_ENDIAN), 4);
+    expect(byteData.getUint16(vTableLoc, Endian.little), 4);
     // Next 2 bytes are the size of the object in bytes (including the vtable
     // pointer), which should be 4.
-    expect(byteData.getUint16(vTableLoc + 2, Endianness.LITTLE_ENDIAN), 4);
+    expect(byteData.getUint16(vTableLoc + 2, Endian.little), 4);
   }
 
   void test_low() {
@@ -229,22 +229,22 @@ class BuilderTest {
     // Convert byteList to a ByteData so that we can read data from it.
     ByteData byteData = byteList.buffer.asByteData(byteList.offsetInBytes);
     // First 4 bytes are an offset to the table data.
-    int tableDataLoc = byteData.getUint32(0, Endianness.LITTLE_ENDIAN);
+    int tableDataLoc = byteData.getUint32(0, Endian.little);
     // First 4 bytes of the table data are a backwards offset to the vtable.
     int vTableLoc = tableDataLoc -
-        byteData.getInt32(tableDataLoc, Endianness.LITTLE_ENDIAN);
+        byteData.getInt32(tableDataLoc, Endian.little);
     // First 2 bytes of the vtable are the size of the vtable in bytes, which
     // should be 10.
-    expect(byteData.getUint16(vTableLoc, Endianness.LITTLE_ENDIAN), 10);
+    expect(byteData.getUint16(vTableLoc, Endian.little), 10);
     // Next 2 bytes are the size of the object in bytes (including the vtable
     // pointer), which should be 16.
-    expect(byteData.getUint16(vTableLoc + 2, Endianness.LITTLE_ENDIAN), 16);
+    expect(byteData.getUint16(vTableLoc + 2, Endian.little), 16);
     // Remaining 6 bytes are the offsets within the object where the ints are
     // located.
     for (int i = 0; i < 3; i++) {
       int offset =
-          byteData.getUint16(vTableLoc + 4 + 2 * i, Endianness.LITTLE_ENDIAN);
-      expect(byteData.getInt32(tableDataLoc + offset, Endianness.LITTLE_ENDIAN),
+          byteData.getUint16(vTableLoc + 4 + 2 * i, Endian.little);
+      expect(byteData.getInt32(tableDataLoc + offset, Endian.little),
           10 + 10 * i);
     }
   }