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/*
* 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.tree;
import java.util.Objects;
import java.util.Optional;
import static com.facebook.presto.sql.tree.RoutineCharacteristics.Determinism.DETERMINISTIC;
import static com.facebook.presto.sql.tree.RoutineCharacteristics.Determinism.NOT_DETERMINISTIC;
import static com.facebook.presto.sql.tree.RoutineCharacteristics.Language.SQL;
import static com.facebook.presto.sql.tree.RoutineCharacteristics.NullCallClause.CALLED_ON_NULL_INPUT;
import static com.google.common.base.MoreObjects.toStringHelper;
import static java.util.Objects.requireNonNull;
public class RoutineCharacteristics
{
public static class Language
{
public static final Language SQL = new Language("SQL");
private final String language;
public Language(String language)
{
this.language = requireNonNull(language.toUpperCase());
}
public String getLanguage()
{
return language;
}
@Override
public int hashCode()
{
return Objects.hash(language);
}
@Override
public boolean equals(Object o)
{
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Language that = (Language) o;
return Objects.equals(language, that.language);
}
@Override
public String toString()
{
return language;
}
}
public enum Determinism
{
DETERMINISTIC,
NOT_DETERMINISTIC;
}
public enum NullCallClause
{
RETURNS_NULL_ON_NULL_INPUT,
CALLED_ON_NULL_INPUT;
}
private final Language language;
private final Determinism determinism;
private final NullCallClause nullCallClause;
public RoutineCharacteristics(
Optional language,
Optional determinism,
Optional nullCallClause)
{
this(language.orElse(SQL),
determinism.orElse(NOT_DETERMINISTIC),
nullCallClause.orElse(CALLED_ON_NULL_INPUT));
}
public RoutineCharacteristics(
Language language,
Determinism determinism,
NullCallClause nullCallClause)
{
this.language = requireNonNull(language, "language is null");
this.determinism = requireNonNull(determinism, "determinism is null");
this.nullCallClause = requireNonNull(nullCallClause, "nullCallClause is null");
}
public Language getLanguage()
{
return language;
}
public Determinism getDeterminism()
{
return determinism;
}
public NullCallClause getNullCallClause()
{
return nullCallClause;
}
public boolean isDeterministic()
{
return determinism == DETERMINISTIC;
}
public boolean isCalledOnNullInput()
{
return nullCallClause == CALLED_ON_NULL_INPUT;
}
@Override
public boolean equals(Object o)
{
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
RoutineCharacteristics that = (RoutineCharacteristics) o;
return language == that.language
&& determinism == that.determinism
&& nullCallClause == that.nullCallClause;
}
@Override
public int hashCode()
{
return Objects.hash(language, determinism, nullCallClause);
}
@Override
public String toString()
{
return toStringHelper(this)
.add("language", language)
.add("determinism", determinism)
.add("nullCallClause", nullCallClause)
.toString();
}
}
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