Expression.java example

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cobar-master
/*
 * 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 2011-4-12)
 */
package com.alibaba.cobar.parser.ast.expression;

import java.util.Map;

import com.alibaba.cobar.parser.ast.ASTNode;

/**
 * @author <a href="mailto:shuo.qius@alibaba-inc.com">QIU Shuo</a>
 */
public interface Expression extends ASTNode {
    int PRECEDENCE_QUERY = 0;
    int PRECEDENCE_ASSIGNMENT = 1;
    int PRECEDENCE_LOGICAL_OR = 2;
    int PRECEDENCE_LOGICAL_XOR = 3;
    int PRECEDENCE_LOGICAL_AND = 4;
    int PRECEDENCE_LOGICAL_NOT = 5;
    int PRECEDENCE_BETWEEN_AND = 6;
    int PRECEDENCE_COMPARISION = 7;
    int PRECEDENCE_ANY_ALL_SUBQUERY = 8;
    int PRECEDENCE_BIT_OR = 8;
    int PRECEDENCE_BIT_AND = 10;
    int PRECEDENCE_BIT_SHIFT = 11;
    int PRECEDENCE_ARITHMETIC_TERM_OP = 12;
    int PRECEDENCE_ARITHMETIC_FACTOR_OP = 13;
    int PRECEDENCE_BIT_XOR = 14;
    int PRECEDENCE_UNARY_OP = 15;
    int PRECEDENCE_BINARY = 16;
    int PRECEDENCE_COLLATE = 17;
    int PRECEDENCE_PRIMARY = 19;

    /**
     * @return precedences are defined in {@link Expression}
     */
    int getPrecedence();

    /**
     * @return this
     */
    Expression setCacheEvalRst(boolean cacheEvalRst);

    Object UNEVALUATABLE = new Object();

    Object evaluation(Map<? extends Object, ? extends Object> parameters);
}