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GeneratedKeyAssignmentTokenGenerator.java
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GeneratedKeyAssignmentTokenGenerator.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.sharding.rewrite.token.generator.impl.keygen;
import com.google.common.base.Preconditions;
import lombok.Setter;
import org.apache.shardingsphere.infra.rewrite.sql.token.generator.aware.ParametersAware;
import org.apache.shardingsphere.sharding.rewrite.token.pojo.GeneratedKeyAssignmentToken;
import org.apache.shardingsphere.sharding.rewrite.token.pojo.LiteralGeneratedKeyAssignmentToken;
import org.apache.shardingsphere.sharding.rewrite.token.pojo.ParameterMarkerGeneratedKeyAssignmentToken;
import org.apache.shardingsphere.sql.parser.binder.segment.insert.keygen.GeneratedKeyContext;
import org.apache.shardingsphere.sql.parser.binder.statement.dml.InsertStatementContext;
import org.apache.shardingsphere.sql.parser.sql.common.statement.dml.InsertStatement;
import org.apache.shardingsphere.sql.parser.sql.dialect.handler.dml.InsertStatementHandler;
import java.util.List;
import java.util.Optional;
/**
* Generated key assignment token generator.
*/
@Setter
public final class GeneratedKeyAssignmentTokenGenerator extends BaseGeneratedKeyTokenGenerator implements ParametersAware {
private List<Object> parameters;
@Override
protected boolean isGenerateSQLToken(final InsertStatementContext insertStatementContext) {
return InsertStatementHandler.getSetAssignmentSegment(insertStatementContext.getSqlStatement()).isPresent();
}
@Override
public GeneratedKeyAssignmentToken generateSQLToken(final InsertStatementContext insertStatementContext) {
Optional<GeneratedKeyContext> generatedKey = insertStatementContext.getGeneratedKeyContext();
Preconditions.checkState(generatedKey.isPresent());
InsertStatement insertStatement = insertStatementContext.getSqlStatement();
Preconditions.checkState(InsertStatementHandler.getSetAssignmentSegment(insertStatement).isPresent());
int startIndex = InsertStatementHandler.getSetAssignmentSegment(insertStatement).get().getStopIndex() + 1;
return parameters.isEmpty() ? new LiteralGeneratedKeyAssignmentToken(startIndex, generatedKey.get().getColumnName(), generatedKey.get().getGeneratedValues().iterator().next())
: new ParameterMarkerGeneratedKeyAssignmentToken(startIndex, generatedKey.get().getColumnName());
}
}