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EncryptSetAssignmentsFiller.java
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EncryptSetAssignmentsFiller.java
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/*
* 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.
*/
package org.apache.shardingsphere.core.parse.antlr.filler.encrypt.dml;
import com.google.common.base.Optional;
import org.apache.shardingsphere.core.metadata.table.ShardingTableMetaData;
import org.apache.shardingsphere.core.parse.antlr.constant.QuoteCharacter;
import org.apache.shardingsphere.core.parse.antlr.filler.SQLSegmentFiller;
import org.apache.shardingsphere.core.parse.antlr.sql.segment.dml.assignment.AssignmentSegment;
import org.apache.shardingsphere.core.parse.antlr.sql.segment.dml.assignment.SetAssignmentsSegment;
import org.apache.shardingsphere.core.parse.antlr.sql.segment.dml.column.ColumnSegment;
import org.apache.shardingsphere.core.parse.antlr.sql.statement.SQLStatement;
import org.apache.shardingsphere.core.parse.antlr.sql.statement.dml.InsertStatement;
import org.apache.shardingsphere.core.parse.lexer.token.DefaultKeyword;
import org.apache.shardingsphere.core.parse.parser.context.condition.Column;
import org.apache.shardingsphere.core.parse.parser.context.insertvalue.InsertValue;
import org.apache.shardingsphere.core.parse.parser.expression.SQLExpression;
import org.apache.shardingsphere.core.parse.parser.expression.SQLPlaceholderExpression;
import org.apache.shardingsphere.core.parse.parser.token.InsertValuesToken;
import org.apache.shardingsphere.core.parse.parser.token.TableToken;
import org.apache.shardingsphere.core.rule.EncryptRule;
import java.util.LinkedList;
import java.util.List;
/**
* Set assignments filler for encrypt.
*
* @author zhangliang
*/
public final class EncryptSetAssignmentsFiller implements SQLSegmentFiller<SetAssignmentsSegment, EncryptRule> {
@Override
public void fill(final SetAssignmentsSegment sqlSegment, final SQLStatement sqlStatement, final EncryptRule encryptRule, final ShardingTableMetaData shardingTableMetaData) {
InsertStatement insertStatement = (InsertStatement) sqlStatement;
String tableName = insertStatement.getTables().getSingleTableName();
for (AssignmentSegment each : sqlSegment.getAssignments()) {
fillColumn(each.getColumn(), insertStatement, tableName);
}
InsertValue insertValue = getInsertValue(sqlSegment, sqlStatement.getLogicSQL());
insertStatement.getInsertValues().getValues().add(insertValue);
insertStatement.setParametersIndex(insertValue.getParametersCount());
insertStatement.getSQLTokens().add(new InsertValuesToken(sqlSegment.getStartIndex(), DefaultKeyword.SET));
}
private void fillColumn(final ColumnSegment sqlSegment, final InsertStatement insertStatement, final String tableName) {
insertStatement.getColumns().add(new Column(sqlSegment.getName(), tableName));
if (sqlSegment.getOwner().isPresent() && tableName.equals(sqlSegment.getOwner().get())) {
insertStatement.getSQLTokens().add(new TableToken(sqlSegment.getStartIndex(), tableName, QuoteCharacter.getQuoteCharacter(tableName), 0));
}
}
private InsertValue getInsertValue(final SetAssignmentsSegment sqlSegment, final String sql) {
int parametersCount = 0;
List<SQLExpression> columnValues = new LinkedList<>();
for (AssignmentSegment each : sqlSegment.getAssignments()) {
Optional<SQLExpression> sqlExpression = each.getValue().convertToSQLExpression(sql);
if (sqlExpression.isPresent()) {
columnValues.add(sqlExpression.get());
if (sqlExpression.get() instanceof SQLPlaceholderExpression) {
parametersCount++;
}
}
}
return new InsertValue(parametersCount, columnValues);
}
}