/*
* 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 com.google.gson.annotations.Expose;
import org.apache.tajo.plan.PlanString;
public class DropDatabaseNode extends LogicalNode implements Cloneable {
@Expose private String databaseName;
@Expose private boolean ifExists = false;
public DropDatabaseNode(int pid) {
super(pid, NodeType.DROP_DATABASE);
}
@Override
public int childNum() {
return 0;
}
@Override
public LogicalNode getChild(int idx) {
return null;
}
public void init(String databaseName, boolean ifExists) {
this.databaseName = databaseName;
this.ifExists = ifExists;
}
public String getDatabaseName() {
return this.databaseName;
}
public boolean isIfExists() {
return ifExists;
}
@Override
public PlanString getPlanString() {
return new PlanString(this).appendTitle(ifExists ? " IF EXISTS " : " ").appendTitle(databaseName);
}
public int hashCode() {
return Objects.hashCode(databaseName, ifExists);
}
public boolean equals(Object obj) {
if (obj instanceof DropDatabaseNode) {
DropDatabaseNode other = (DropDatabaseNode) obj;
boolean eq = super.equals(other);
eq &= this.databaseName.equals(other.databaseName);
eq &= ifExists == other.ifExists;
return eq;
} else {
return false;
}
}
@Override
public Object clone() throws CloneNotSupportedException {
DropDatabaseNode dropTableNode = (DropDatabaseNode) super.clone();
dropTableNode.databaseName = databaseName;
return dropTableNode;
}
@Override
public String toString() {
return "DROP DATABASE " + (ifExists ? "IF EXISTS ":"") + databaseName;
}
@Override
public void preOrder(LogicalNodeVisitor visitor) {
visitor.visit(this);
}
@Override
public void postOrder(LogicalNodeVisitor visitor) {
visitor.visit(this);
}
}