/**
* 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 org.apache.tajo.engine.planner.logical;
import com.google.common.base.Preconditions;
import com.google.gson.annotations.Expose;
import org.apache.tajo.catalog.Schema;
import org.apache.tajo.catalog.SortSpec;
import org.apache.tajo.engine.planner.PlanString;
import org.apache.tajo.util.TUtil;
public final class SortNode extends UnaryNode implements Cloneable {
@Expose private SortSpec [] sortKeys;
public SortNode(int pid, SortSpec[] sortKeys) {
super(pid, NodeType.SORT);
Preconditions.checkArgument(sortKeys.length > 0,
"At least one sort key must be specified");
this.sortKeys = sortKeys;
}
public SortNode(int pid, SortSpec[] sortKeys, Schema inSchema, Schema outSchema) {
this(pid, sortKeys);
this.setInSchema(inSchema);
this.setOutSchema(outSchema);
}
public SortSpec[] getSortKeys() {
return this.sortKeys;
}
@Override
public boolean equals(Object obj) {
if (obj instanceof SortNode) {
SortNode other = (SortNode) obj;
boolean eq = super.equals(other);
eq = eq && TUtil.checkEquals(sortKeys, other.sortKeys);
eq = eq && child.equals(other.child);
return eq;
} else {
return false;
}
}
@Override
public Object clone() throws CloneNotSupportedException {
SortNode sort = (SortNode) super.clone();
sort.sortKeys = sortKeys.clone();
return sort;
}
@Override
public PlanString getPlanString() {
PlanString planStr = new PlanString("Sort");
StringBuilder sb = new StringBuilder("Sort Keys: ");
for (int i = 0; i < sortKeys.length; i++) {
sb.append(sortKeys[i].getSortKey().getColumnName()).append(" ")
.append(sortKeys[i].isAscending() ? "asc" : "desc");
if( i < sortKeys.length - 1) {
sb.append(",");
}
}
planStr.addExplan(sb.toString());
return planStr;
}
public String toString() {
StringBuilder sb = new StringBuilder("Sort [key= ");
for (int i = 0; i < sortKeys.length; i++) {
sb.append(sortKeys[i].getSortKey().getQualifiedName()).append(" ")
.append(sortKeys[i].isAscending() ? "asc" : "desc");
if(i < sortKeys.length - 1) {
sb.append(",");
}
}
sb.append("]");
sb.append("\n\"out schema: " + getOutSchema()
+ "\n\"in schema: " + getInSchema());
return sb.toString()+"\n"
+ getChild().toString();
}
}