com.hazelcast.org.apache.calcite.adapter.enumerable.JavaRelImplementor Maven / Gradle / Ivy
/*
* 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 com.hazelcast.org.apache.calcite.adapter.enumerable;
import com.hazelcast.org.apache.calcite.DataContext;
import com.hazelcast.org.apache.calcite.adapter.java.JavaTypeFactory;
import com.hazelcast.org.apache.calcite.linq4j.tree.ParameterExpression;
import com.hazelcast.org.apache.calcite.plan.RelImplementor;
import com.hazelcast.org.apache.calcite.rex.RexBuilder;
/**
* Abstract base class for implementations of {@link RelImplementor}
* that generate java code.
*/
public abstract class JavaRelImplementor implements RelImplementor {
private final RexBuilder rexBuilder;
protected JavaRelImplementor(RexBuilder rexBuilder) {
this.rexBuilder = rexBuilder;
assert rexBuilder.getTypeFactory() instanceof JavaTypeFactory
: "Type factory of rexBuilder should be a JavaTypeFactory";
}
public RexBuilder getRexBuilder() {
return rexBuilder;
}
public JavaTypeFactory getTypeFactory() {
return (JavaTypeFactory) rexBuilder.getTypeFactory();
}
/**
* Returns the expression used to access
* {@link com.hazelcast.org.apache.calcite.DataContext}.
*
* @return expression used to access {@link com.hazelcast.org.apache.calcite.DataContext}.
*/
public ParameterExpression getRootExpression() {
return DataContext.ROOT;
}
}