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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.shardingsphere.infra.binder.segment.expression.impl;
19  
20  import lombok.AccessLevel;
21  import lombok.NoArgsConstructor;
22  import org.apache.shardingsphere.infra.binder.enums.SegmentType;
23  import org.apache.shardingsphere.infra.binder.segment.expression.ExpressionSegmentBinder;
24  import org.apache.shardingsphere.infra.binder.segment.from.TableSegmentBinderContext;
25  import org.apache.shardingsphere.infra.binder.statement.SQLStatementBinderContext;
26  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.BinaryOperationExpression;
27  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExpressionSegment;
28  
29  import java.util.Map;
30  
31  /**
32   * Binary operation expression binder.
33   */
34  @NoArgsConstructor(access = AccessLevel.PRIVATE)
35  public final class BinaryOperationExpressionBinder {
36      
37      /**
38       * Bind binary operation expression with metadata.
39       *
40       * @param segment binary operation expression segment
41       * @param parentSegmentType parent segment type
42       * @param statementBinderContext statement binder context
43       * @param tableBinderContexts table binder contexts
44       * @param outerTableBinderContexts outer table binder contexts
45       * @return bounded binary operation expression segment
46       */
47      public static BinaryOperationExpression bind(final BinaryOperationExpression segment, final SegmentType parentSegmentType, final SQLStatementBinderContext statementBinderContext,
48                                                   final Map<String, TableSegmentBinderContext> tableBinderContexts, final Map<String, TableSegmentBinderContext> outerTableBinderContexts) {
49          ExpressionSegment boundedLeft = ExpressionSegmentBinder.bind(segment.getLeft(), parentSegmentType, statementBinderContext, tableBinderContexts, outerTableBinderContexts);
50          ExpressionSegment boundedRight = ExpressionSegmentBinder.bind(segment.getRight(), parentSegmentType, statementBinderContext, tableBinderContexts, outerTableBinderContexts);
51          return new BinaryOperationExpression(segment.getStartIndex(), segment.getStopIndex(), boundedLeft, boundedRight, segment.getOperator(), segment.getText());
52      }
53  }