/*
* Copyright 1999-2012 Alibaba Group.
*
* 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.
*/
/**
* (created at 2011-5-19)
*/
package com.alibaba.cobar.parser.ast.stmt.dml;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import com.alibaba.cobar.parser.ast.expression.Expression;
import com.alibaba.cobar.parser.ast.expression.primary.Identifier;
import com.alibaba.cobar.parser.ast.fragment.Limit;
import com.alibaba.cobar.parser.ast.fragment.OrderBy;
import com.alibaba.cobar.parser.ast.fragment.tableref.TableReferences;
import com.alibaba.cobar.parser.util.Pair;
import com.alibaba.cobar.parser.visitor.SQLASTVisitor;
/**
* @author <a href="mailto:shuo.qius@alibaba-inc.com">QIU Shuo</a>
*/
public class DMLUpdateStatement extends DMLStatement {
private final boolean lowPriority;
private final boolean ignore;
private final TableReferences tableRefs;
private final List<Pair<Identifier, Expression>> values;
private final Expression where;
private final OrderBy orderBy;
private final Limit limit;
public DMLUpdateStatement(boolean lowPriority, boolean ignore, TableReferences tableRefs,
List<Pair<Identifier, Expression>> values, Expression where, OrderBy orderBy, Limit limit){
this.lowPriority = lowPriority;
this.ignore = ignore;
if (tableRefs == null) throw new IllegalArgumentException("argument tableRefs is null for update stmt");
this.tableRefs = tableRefs;
if (values == null || values.size() <= 0) {
this.values = Collections.emptyList();
} else if (!(values instanceof ArrayList)) {
this.values = new ArrayList<Pair<Identifier, Expression>>(values);
} else {
this.values = values;
}
this.where = where;
this.orderBy = orderBy;
this.limit = limit;
}
public boolean isLowPriority() {
return lowPriority;
}
public boolean isIgnore() {
return ignore;
}
public TableReferences getTableRefs() {
return tableRefs;
}
public List<Pair<Identifier, Expression>> getValues() {
return values;
}
public Expression getWhere() {
return where;
}
public OrderBy getOrderBy() {
return orderBy;
}
public Limit getLimit() {
return limit;
}
@Override
public void accept(SQLASTVisitor visitor) {
visitor.visit(this);
}
}