com.hazelcast.org.apache.calcite.rel.mutable.MutableSort 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 com.hazelcast.com.liance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.com.hazelcast.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.rel.mutable;
import com.hazelcast.org.apache.calcite.rel.RelCollation;
import com.hazelcast.org.apache.calcite.rex.RexNode;
import java.util.Objects;
/** Mutable equivalent of {@link com.hazelcast.org.apache.calcite.rel.core.Sort}. */
public class MutableSort extends MutableSingleRel {
public final RelCollation collation;
public final RexNode offset;
public final RexNode fetch;
private MutableSort(MutableRel input, RelCollation collation,
RexNode offset, RexNode fetch) {
super(MutableRelType.SORT, input.rowType, input);
this.collation = collation;
this.offset = offset;
this.fetch = fetch;
}
/**
* Creates a MutableSort.
*
* @param input Input relational expression
* @param collation Array of sort specifications
* @param offset Expression for number of rows to discard before returning
* first row
* @param fetch Expression for number of rows to fetch
*/
public static MutableSort of(MutableRel input, RelCollation collation,
RexNode offset, RexNode fetch) {
return new MutableSort(input, collation, offset, fetch);
}
@Override public boolean equals(Object obj) {
return obj == this
|| obj instanceof MutableSort
&& collation.equals(((MutableSort) obj).collation)
&& Objects.equals(offset, ((MutableSort) obj).offset)
&& Objects.equals(fetch, ((MutableSort) obj).fetch)
&& input.equals(((MutableSort) obj).input);
}
@Override public int hashCode() {
return Objects.hash(input, collation, offset, fetch);
}
@Override public StringBuilder digest(StringBuilder buf) {
buf.append("Sort(collation: ").append(collation);
if (offset != null) {
buf.append(", offset: ").append(offset);
}
if (fetch != null) {
buf.append(", fetch: ").append(fetch);
}
return buf.append(")");
}
@Override public MutableRel clone() {
return MutableSort.of(input.clone(), collation, offset, fetch);
}
}