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A quick developing framewort for internet company
/**
* Copyright (C) 2016 - 2030 youtongluan.
*
* 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 org.yx.db.mapper;
import java.util.Map;
import java.util.Objects;
import org.yx.common.expression.ParamExpression;
import org.yx.db.sql.MapedSql;
public class IFParser implements SqlParser {
private final SqlParser parser;
private final ParamExpression expression;
public static IFParser create(ParamExpression expression, SqlParser parser) {
if (parser == null) {
return null;
}
return new IFParser(Objects.requireNonNull(expression), parser);
}
private IFParser(ParamExpression expression, SqlParser parser) {
this.expression = expression;
this.parser = parser;
}
@Override
public MapedSql toMapedSql(Map map) throws Exception {
return expression.test(map) ? parser.toMapedSql(map) : null;
}
@Override
public String toString() {
return "IF(" + expression + "): " + this.parser;
}
}