/**
* 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.gson.annotations.Expose;
import org.apache.tajo.engine.planner.PlanString;
public final class LimitNode extends UnaryNode implements Cloneable {
@Expose private long fetchFirstNum;
public LimitNode(int pid, long fetchFirstNum) {
super(pid, NodeType.LIMIT);
this.fetchFirstNum = fetchFirstNum;
}
public long getFetchFirstNum() {
return fetchFirstNum;
}
@Override
public PlanString getPlanString() {
return new PlanString("Limit");
}
@Override
public boolean equals(Object obj) {
if (obj instanceof LimitNode) {
LimitNode other = (LimitNode) obj;
return super.equals(other)
&& fetchFirstNum == other.fetchFirstNum
&& child.equals(other.child);
} else {
return false;
}
}
@Override
public Object clone() throws CloneNotSupportedException {
LimitNode newLimitNode = (LimitNode) super.clone();
newLimitNode.fetchFirstNum = fetchFirstNum;
return newLimitNode;
}
public String toString() {
StringBuilder sb = new StringBuilder("Limit (").append(fetchFirstNum).append(")");
sb.append("\n \"out schema: ").append(getOutSchema())
.append("\n \"in schema: " + getInSchema());
sb.append("\n").append(getChild().toString());
return sb.toString();
}
}