com.hazelcast.jet.sql.impl.connector.jdbc.ParamCollectingVisitor Maven / Gradle / Ivy
/*
* Copyright 2021 Hazelcast Inc.
*
* Licensed under the Hazelcast Community License (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://hazelcast.com/hazelcast-community-license
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.jet.sql.impl.connector.jdbc;
import com.hazelcast.com.google.common.primitives.Ints;
import com.hazelcast.org.apache.calcite.sql.SqlDynamicParam;
import com.hazelcast.org.apache.calcite.sql.SqlNode;
import com.hazelcast.org.apache.calcite.sql.util.SqlBasicVisitor;
import java.util.ArrayList;
import java.util.List;
/**
* Visitor for {@link SqlNode} that collects indexes of query input parameters used in the SqlNode
*/
class ParamCollectingVisitor extends SqlBasicVisitor {
private final List parameterPositions = new ArrayList<>();
@Override
public SqlNode visit(SqlDynamicParam param) {
parameterPositions.add(param.getIndex());
return param;
}
/**
* Mapping of parameters in the built query to actual query parameters
*/
public int[] parameterPositions() {
return Ints.toArray(parameterPositions);
}
}