import quincy 17.2.0

[ceph.git] / ceph / src / arrow / csharp / src / Apache.Arrow / Field.Builder.cs

diff --git a/ceph/src/arrow/csharp/src/Apache.Arrow/Field.Builder.cs b/ceph/src/arrow/csharp/src/Apache.Arrow/Field.Builder.cs
new file mode 100644 (file)
index 0000000..1e7aa19
--- /dev/null
+++ b/ceph/src/arrow/csharp/src/Apache.Arrow/Field.Builder.cs
@@ -0,0 +1,93 @@
+// 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.
+
+using Apache.Arrow.Types;
+using System;
+using System.Collections.Generic;
+
+namespace Apache.Arrow
+{
+    public partial class Field
+    {
+        public class Builder
+        {
+            private Dictionary<string, string> _metadata;
+            private string _name;
+            private IArrowType _type;
+            private bool _nullable;
+
+            public Builder()
+            {
+                _name = string.Empty;
+                _type = NullType.Default;
+                _nullable = true;
+            }
+
+            public Builder Name(string value)
+            {
+                if (string.IsNullOrWhiteSpace(value))
+                {
+                    throw new ArgumentNullException(nameof(value));
+                }
+
+                _name = value;
+                return this;
+            }
+
+            public Builder DataType(IArrowType type)
+            {
+                _type = type ?? NullType.Default;
+                return this;
+            }
+
+            public Builder Nullable(bool value)
+            {
+                _nullable = value;
+                return this;
+            }
+
+            public Builder Metadata(string key, string value)
+            {
+                if (string.IsNullOrWhiteSpace(key))
+                {
+                    throw new ArgumentNullException(nameof(key));
+                }
+
+                _metadata ??= new Dictionary<string, string>();
+
+                _metadata[key] = value;
+                return this;
+            }
+
+            public Builder Metadata(IEnumerable<KeyValuePair<string, string>> dictionary)
+            {
+                if (dictionary == null)
+                {
+                    throw new ArgumentNullException(nameof(dictionary));
+                }
+                foreach (KeyValuePair<string, string> entry in dictionary)
+                {
+                    Metadata(entry.Key, entry.Value);
+                }
+                return this;
+            }
+
+            public Field Build()
+            {
+                return new Field(_name, _type, _nullable, _metadata);
+            }
+        }
+    }
+}