/*
* Licensed 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.facebook.presto.sql.analyzer;
import com.facebook.presto.sql.tree.Query;
import com.google.common.base.Preconditions;
import java.util.HashMap;
import java.util.Map;
public class AnalysisContext
{
private final AnalysisContext parent;
private final Map<String, Query> namedQueries = new HashMap<>();
private boolean approximate;
public AnalysisContext(AnalysisContext parent)
{
this.parent = parent;
this.approximate = parent.approximate;
}
public AnalysisContext()
{
parent = null;
}
public boolean isApproximate()
{
return approximate;
}
public void setApproximate(boolean approximate)
{
this.approximate = approximate;
}
public void addNamedQuery(String name, Query query)
{
Preconditions.checkState(!namedQueries.containsKey(name), "Named query already registered: %s", name);
namedQueries.put(name, query);
}
public Query getNamedQuery(String name)
{
Query result = namedQueries.get(name);
if (result == null && parent != null) {
return parent.getNamedQuery(name);
}
return result;
}
public boolean isNamedQueryDeclared(String name)
{
return namedQueries.containsKey(name);
}
}