com.alibaba.druid.sql.ast.expr.SQLFlashbackExpr Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of druid Show documentation
Show all versions of druid Show documentation
A JDBC datasource implementation.
/*
* Copyright 1999-2017 Alibaba Group Holding Ltd.
*
* Licensed 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 com.alibaba.druid.sql.ast.expr;
import com.alibaba.druid.sql.ast.*;
import com.alibaba.druid.sql.visitor.SQLASTVisitor;
import java.util.Collections;
import java.util.List;
/**
* Created by wenshao on 14/06/2017.
*/
public class SQLFlashbackExpr extends SQLExprImpl implements SQLReplaceable {
private Type type;
private SQLExpr expr;
public SQLFlashbackExpr() {
}
public SQLFlashbackExpr(Type type, SQLExpr expr) {
this.type = type;
this.setExpr(expr);
}
public Type getType() {
return type;
}
public void setType(Type type) {
this.type = type;
}
public SQLExpr getExpr() {
return expr;
}
public void setExpr(SQLExpr expr) {
if (expr != null) {
expr.setParent(this);
}
this.expr = expr;
}
@Override
public boolean replace(SQLExpr expr, SQLExpr target) {
if (this.expr == expr) {
setExpr((SQLName) target);
return true;
}
return false;
}
@Override
protected void accept0(SQLASTVisitor visitor) {
if (visitor.visit(this)) {
if (this.expr != null) {
this.expr.accept(visitor);
}
}
visitor.endVisit(this);
}
@Override
public List getChildren() {
return Collections.singletonList(expr);
}
public SQLFlashbackExpr clone() {
SQLFlashbackExpr x = new SQLFlashbackExpr();
x.type = this.type;
if (expr != null) {
x.setExpr(expr.clone());
}
return x;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
SQLFlashbackExpr that = (SQLFlashbackExpr) o;
if (type != that.type) {
return false;
}
return expr != null ? expr.equals(that.expr) : that.expr == null;
}
@Override
public int hashCode() {
int result = type != null ? type.hashCode() : 0;
result = 31 * result + (expr != null ? expr.hashCode() : 0);
return result;
}
public static enum Type {
SCN, TIMESTAMP
}
}