diff options
Diffstat (limited to '')
-rw-r--r-- | src/arrow/ruby/red-gandiva/lib/gandiva/expression-builder/if.rb | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/arrow/ruby/red-gandiva/lib/gandiva/expression-builder/if.rb b/src/arrow/ruby/red-gandiva/lib/gandiva/expression-builder/if.rb new file mode 100644 index 000000000..c0a00c3a8 --- /dev/null +++ b/src/arrow/ruby/red-gandiva/lib/gandiva/expression-builder/if.rb @@ -0,0 +1,75 @@ +# 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. + +module Gandiva + class ExpressionBuilder + class If + def initialize(condition) + @condition = condition + @then = nil + @else = nil + end + + def then(clause) + @then = clause + self + end + + def else(clause) + @else = clause + self + end + + def elsif(condition) + Elsif.new(self, condition) + end + + def build + build_if_node(condition_node, + then_node, + else_node) + end + + protected + def condition_node + @condition.build + end + + def then_node + @then&.build + end + + def else_node + @else&.build + end + + private + def build_if_node(condition_node, then_node, else_node) + if then_node and else_node + # TODO: Validate then_node.return_type == else_node.return_type + return_type = then_node.return_type + else + return_type = (then_node || else_node).return_type + end + IfNode.new(condition_node, + then_node, + else_node, + return_type) + end + end + end +end |