/*
* 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 2011-1-26)
*/
package com.alibaba.cobar.parser.ast.expression.misc;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import com.alibaba.cobar.parser.ast.expression.AbstractExpression;
import com.alibaba.cobar.parser.ast.expression.Expression;
import com.alibaba.cobar.parser.visitor.SQLASTVisitor;
/**
* @author <a href="mailto:shuo.qius@alibaba-inc.com">QIU Shuo</a>
*/
public class InExpressionList extends AbstractExpression {
private List<Expression> list;
public InExpressionList(List<Expression> list){
if (list == null || list.size() == 0) {
this.list = Collections.emptyList();
} else if (list instanceof ArrayList) {
this.list = list;
} else {
this.list = new ArrayList<Expression>(list);
}
}
/**
* @return never null
*/
public List<Expression> getList() {
return list;
}
@Override
public int getPrecedence() {
return PRECEDENCE_PRIMARY;
}
@Override
public Object evaluationInternal(Map<? extends Object, ? extends Object> parameters) {
return UNEVALUATABLE;
}
private List<Expression> replaceList;
public void setReplaceExpr(List<Expression> replaceList) {
this.replaceList = replaceList;
}
public void clearReplaceExpr() {
this.replaceList = null;
}
@Override
public void accept(SQLASTVisitor visitor) {
if (replaceList == null) {
visitor.visit(this);
} else {
List<Expression> temp = list;
list = replaceList;
visitor.visit(this);
list = temp;
}
}
}