/*
* 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.plan.logical;
import com.google.common.base.Objects;
import org.apache.tajo.plan.PlanString;
public class DropTableNode extends LogicalNode implements Cloneable {
private String tableName;
private boolean ifExists;
private boolean purge;
public DropTableNode(int pid) {
super(pid, NodeType.DROP_TABLE);
}
@Override
public int childNum() {
return 0;
}
@Override
public LogicalNode getChild(int idx) {
return null;
}
public void init(String tableName, boolean ifExists, boolean purge) {
this.tableName = tableName;
this.ifExists = ifExists;
this.purge = purge;
}
public String getTableName() {
return this.tableName;
}
public boolean isIfExists() {
return this.ifExists;
}
public boolean isPurge() {
return this.purge;
}
@Override
public PlanString getPlanString() {
return new PlanString(this).appendTitle(ifExists ? " IF EXISTS" : "").appendTitle(purge ? " PURGE" : "");
}
public int hashCode() {
return Objects.hashCode(tableName, ifExists, purge);
}
public boolean equals(Object obj) {
if (obj instanceof DropTableNode) {
DropTableNode other = (DropTableNode) obj;
return super.equals(other) &&
this.tableName.equals(other.tableName) &&
this.ifExists == other.ifExists &&
this.purge == other.purge;
} else {
return false;
}
}
@Override
public Object clone() throws CloneNotSupportedException {
DropTableNode dropTableNode = (DropTableNode) super.clone();
dropTableNode.tableName = tableName;
dropTableNode.ifExists = ifExists;
dropTableNode.purge = purge;
return dropTableNode;
}
@Override
public String toString() {
return "DROP TABLE " + (ifExists ? "IF EXISTS " : "") + tableName + (purge ? " PURGE" : "");
}
@Override
public void preOrder(LogicalNodeVisitor visitor) {
visitor.visit(this);
}
@Override
public void postOrder(LogicalNodeVisitor visitor) {
visitor.visit(this);
}
}