InsertStatementNode.cs

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// 
//  Copyright 2010-2015 Deveel
// 
//    Licensed 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 System;
using System.Collections.Generic;
using System.Linq;

using Deveel.Data.Sql.Expressions;
using Deveel.Data.Sql.Statements;

namespace Deveel.Data.Sql.Parser {
    class InsertStatementNode : SqlStatementNode {
        public string TableName { get; private set; }

        public IEnumerable<string> ColumnNames { get; private set; }

        public ValuesInsertNode ValuesInsert { get; private set; }

        public SetInsertNode SetInsert { get; private set; }

        public QueryInsertNode QueryInsert { get; private set; }

        protected override ISqlNode OnChildNode(ISqlNode node) {
            if (node is ObjectNameNode) {
                TableName = ((ObjectNameNode) node).Name;
            } else if (node.NodeName.Equals("insert_source")) {
                var colNode = node.FindByName("column_list_opt");
                if (colNode != null)
                    ColumnNames = colNode.FindNodes<IdentifierNode>().Select(x => x.Text);

                ValuesInsert = node.FindNode<ValuesInsertNode>();
                SetInsert = node.FindNode<SetInsertNode>();
                QueryInsert = node.FindNode<QueryInsertNode>();
            }

            return base.OnChildNode(node);
        }

        protected override void BuildStatement(StatementBuilder builder) {
            if (ValuesInsert != null) {
                var valueInsert = ValuesInsert;
                var values =
                    valueInsert.Values.Select(setNode => setNode.Values.Select(ExpressionBuilder.Build).ToArray()).ToList();
                builder.Statements.Add(new InsertStatement(TableName, ColumnNames, values));
            } else if (SetInsert != null) {
                var assignments = SetInsert.Assignments;

                var columnNames = new List<string>();
                var values = new List<SqlExpression>();
                foreach (var assignment in assignments) {
                    var columnName = assignment.ColumnName;
                    var value = ExpressionBuilder.Build(assignment.Value);

                    columnNames.Add(columnName);
                    values.Add(value);
                }

                builder.Statements.Add(new InsertStatement(TableName, columnNames.ToArray(), new[] {values.ToArray()}));
            } else if (QueryInsert != null) {
                var queryInsert = QueryInsert;
                var queryExpression = ExpressionBuilder.Build(queryInsert.QueryExpression) as SqlQueryExpression;
                if (queryExpression == null)
                    throw new SqlParseException();

                builder.Statements.Add(new InsertSelectStatement(TableName, ColumnNames, queryExpression));
            }
        }
    }
}