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An JDBC datasource implementation.
/*
* Copyright 1999-2018 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.dialect.postgresql.ast.expr;
import com.alibaba.druid.sql.ast.SQLExpr;
import com.alibaba.druid.sql.ast.SQLObject;
import com.alibaba.druid.sql.dialect.postgresql.visitor.PGASTVisitor;
import java.util.Collections;
import java.util.List;
public class PGExtractExpr extends PGExprImpl {
private PGDateField field;
private SQLExpr source;
public PGExtractExpr clone() {
PGExtractExpr x = new PGExtractExpr();
x.field = field;
if (source != null) {
x.setSource(source.clone());
}
return x;
}
public PGDateField getField() {
return field;
}
public void setField(PGDateField field) {
this.field = field;
}
public SQLExpr getSource() {
return source;
}
public void setSource(SQLExpr source) {
if (source != null) {
source.setParent(this);
}
this.source = source;
}
@Override
public void accept0(PGASTVisitor visitor) {
if (visitor.visit(this)) {
acceptChild(visitor, source);
}
visitor.endVisit(this);
}
public List getChildren() {
return Collections.singletonList(source);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((field == null) ? 0 : field.hashCode());
result = prime * result + ((source == null) ? 0 : source.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;
}
PGExtractExpr other = (PGExtractExpr) obj;
if (field != other.field) {
return false;
}
if (source == null) {
if (other.source != null) {
return false;
}
} else if (!source.equals(other.source)) {
return false;
}
return true;
}
}