/**
 * Alipay.com Inc.
 * Copyright (c) 2004-2012 All Rights Reserved.
 */
package com.alipay.zdal.parser.sql.dialect.mysql.ast.expr;

import java.util.ArrayList;
import java.util.List;

import com.alipay.zdal.parser.sql.ast.SQLExpr;
import com.alipay.zdal.parser.sql.ast.SQLExprImpl;
import com.alipay.zdal.parser.sql.dialect.mysql.visitor.MySqlASTVisitor;
import com.alipay.zdal.parser.sql.visitor.SQLASTVisitor;

/**
 * 
 * @author ����
 * @version $Id: MySqlMatchAgainstExpr.java, v 0.1 2012-11-17 ����3:30:49 Exp $
 */
public class MySqlMatchAgainstExpr extends SQLExprImpl implements MySqlExpr {

    private static final long serialVersionUID = 1L;

    private List<SQLExpr>     columns          = new ArrayList<SQLExpr>();

    private SQLExpr           against;

    private SearchModifier    searchModifier;

    public List<SQLExpr> getColumns() {
        return columns;
    }

    public void setColumns(List<SQLExpr> columns) {
        this.columns = columns;
    }

    public SQLExpr getAgainst() {
        return against;
    }

    public void setAgainst(SQLExpr against) {
        this.against = against;
    }

    public SearchModifier getSearchModifier() {
        return searchModifier;
    }

    public void setSearchModifier(SearchModifier searchModifier) {
        this.searchModifier = searchModifier;
    }

    public static enum SearchModifier {
        IN_BOOLEAN_MODE("IN BOOLEAN MODE"), IN_NATURAL_LANGUAGE_MODE("IN NATURAL LANGUAGE MODE"), IN_NATURAL_LANGUAGE_MODE_WITH_QUERY_EXPANSION(
                                                                                                                                                "IN NATURAL LANGUAGE MODE WITH QUERY EXPANSION"), WITH_QUERY_EXPANSION(
                                                                                                                                                                                                                       "WITH QUERY EXPANSION"), ;

        public final String name;

        SearchModifier() {
            this(null);
        }

        SearchModifier(String name) {
            this.name = name;
        }
    }

    @Override
    protected void accept0(SQLASTVisitor visitor) {
        MySqlASTVisitor mysqlVisitor = (MySqlASTVisitor) visitor;
        if (mysqlVisitor.visit(this)) {
            acceptChild(visitor, this.columns);
            acceptChild(visitor, this.against);
        }
        mysqlVisitor.endVisit(this);
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((against == null) ? 0 : against.hashCode());
        result = prime * result + ((columns == null) ? 0 : columns.hashCode());
        result = prime * result + ((searchModifier == null) ? 0 : searchModifier.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;
        }
        MySqlMatchAgainstExpr other = (MySqlMatchAgainstExpr) obj;
        if (against == null) {
            if (other.against != null) {
                return false;
            }
        } else if (!against.equals(other.against)) {
            return false;
        }
        if (columns == null) {
            if (other.columns != null) {
                return false;
            }
        } else if (!columns.equals(other.columns)) {
            return false;
        }
        if (searchModifier != other.searchModifier) {
            return false;
        }
        return true;
    }

}