io.shardingjdbc.core.util.SQLUtil Maven / Gradle / Ivy
/*
* Copyright 1999-2015 dangdang.com.
*
* 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 io.shardingjdbc.core.util;
import com.google.common.base.CharMatcher;
import io.shardingjdbc.core.constant.DatabaseType;
import io.shardingjdbc.core.parsing.lexer.dialect.mysql.MySQLKeyword;
import io.shardingjdbc.core.parsing.lexer.token.DefaultKeyword;
import lombok.AccessLevel;
import lombok.AllArgsConstructor;
/**
* SQL utility class.
*
* @author gaohongtao
*/
@AllArgsConstructor(access = AccessLevel.PRIVATE)
public class SQLUtil {
/**
* Get exactly value for SQL expression.
*
* remove special char for SQL expression
*
* @param value SQL expression
* @return exactly SQL expression
*/
public static String getExactlyValue(final String value) {
return null == value ? null : CharMatcher.anyOf("[]`'\"").removeFrom(value);
}
/**
* Get original value for SQL expression.
*
* @param value SQL expression
* @param databaseType database type
* @return original SQL expression
*/
public static String getOriginalValue(final String value, final DatabaseType databaseType) {
if (DatabaseType.MySQL == databaseType) {
try {
DefaultKeyword.valueOf(value.toUpperCase());
MySQLKeyword.valueOf(value.toUpperCase());
return String.format("`%s`", value);
} catch (final IllegalArgumentException ex) {
return value;
}
}
return value;
}
}