com.hazelcast.shaded.org.apache.calcite.plan.ViewExpanders Maven / Gradle / Ivy
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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 com.hazelcast.shaded.org.apache.calcite.plan;
import com.hazelcast.shaded.org.apache.calcite.rel.RelRoot;
import com.hazelcast.shaded.org.apache.calcite.rel.hint.RelHint;
import com.hazelcast.shaded.org.apache.calcite.rel.type.RelDataType;
import com.hazelcast.shaded.com.google.common.collect.ImmutableList;
import com.hazelcast.shaded.org.checkerframework.checker.nullness.qual.Nullable;
import java.util.List;
/**
* Utilities for {@link RelOptTable.ViewExpander} and
* {@link RelOptTable.ToRelContext}.
*/
public abstract class ViewExpanders {
private ViewExpanders() {}
/** Converts a {@code ViewExpander} to a {@code ToRelContext}. */
public static RelOptTable.ToRelContext toRelContext(
RelOptTable.ViewExpander viewExpander,
RelOptCluster cluster,
List hints) {
return new RelOptTable.ToRelContext() {
@Override public RelOptCluster getCluster() {
return cluster;
}
@Override public List getTableHints() {
return hints;
}
@Override public RelRoot expandView(RelDataType rowType, String queryString,
List schemaPath, @Nullable List viewPath) {
return viewExpander.expandView(rowType, queryString, schemaPath,
viewPath);
}
};
}
/** Converts a {@code ViewExpander} to a {@code ToRelContext}. */
public static RelOptTable.ToRelContext toRelContext(
RelOptTable.ViewExpander viewExpander,
RelOptCluster cluster) {
return toRelContext(viewExpander, cluster, ImmutableList.of());
}
/** Creates a simple {@code ToRelContext} that cannot expand views. */
public static RelOptTable.ToRelContext simpleContext(RelOptCluster cluster) {
return simpleContext(cluster, ImmutableList.of());
}
/** Creates a simple {@code ToRelContext} that cannot expand views. */
public static RelOptTable.ToRelContext simpleContext(
RelOptCluster cluster,
List hints) {
return new RelOptTable.ToRelContext() {
@Override public RelOptCluster getCluster() {
return cluster;
}
@Override public RelRoot expandView(RelDataType rowType, String queryString,
List schemaPath, @Nullable List viewPath) {
throw new UnsupportedOperationException();
}
@Override public List getTableHints() {
return hints;
}
};
}
}
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