/**
* Alipay.com Inc.
* Copyright (c) 2004-2012 All Rights Reserved.
*/
package com.alipay.zdal.parser.sql.dialect.oracle.ast.expr;
import com.alipay.zdal.parser.sql.ast.SQLExpr;
import com.alipay.zdal.parser.sql.ast.SQLExprImpl;
import com.alipay.zdal.parser.sql.dialect.oracle.visitor.OracleASTVisitor;
import com.alipay.zdal.parser.sql.visitor.SQLASTVisitor;
/**
*
* @author ����
* @version $Id: OracleExtractExpr.java, v 0.1 2012-11-17 ����3:43:57 Exp $
*/
public class OracleExtractExpr extends SQLExprImpl implements OracleExpr {
private static final long serialVersionUID = 1L;
private OracleDateTimeUnit unit;
private SQLExpr from;
public OracleExtractExpr() {
}
public OracleDateTimeUnit getUnit() {
return this.unit;
}
public void setUnit(OracleDateTimeUnit unit) {
this.unit = unit;
}
public SQLExpr getFrom() {
return this.from;
}
public void setFrom(SQLExpr from) {
this.from = from;
}
public void output(StringBuffer buf) {
buf.append("EXTRACT(");
buf.append(this.unit.name());
buf.append(" FROM ");
this.from.output(buf);
buf.append(")");
}
@Override
protected void accept0(SQLASTVisitor visitor) {
this.accept0((OracleASTVisitor) visitor);
}
public void accept0(OracleASTVisitor visitor) {
if (visitor.visit(this)) {
acceptChild(visitor, this.from);
}
visitor.endVisit(this);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((from == null) ? 0 : from.hashCode());
result = prime * result + ((unit == null) ? 0 : unit.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
OracleExtractExpr other = (OracleExtractExpr) obj;
if (from == null) {
if (other.from != null) {
return false;
}
} else if (!from.equals(other.from)) {
return false;
}
if (unit != other.unit) {
return false;
}
return true;
}
}