org.mybatis.dynamic.sql.select.function.AbstractFunction Maven / Gradle / Ivy
/**
* Copyright 2016-2018 the original author or authors.
*
* 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.mybatis.dynamic.sql.select.function;
import java.sql.JDBCType;
import java.util.Objects;
import java.util.Optional;
import org.mybatis.dynamic.sql.BindableColumn;
public abstract class AbstractFunction> implements BindableColumn {
protected BindableColumn column;
protected String alias;
protected AbstractFunction(BindableColumn column) {
this.column = Objects.requireNonNull(column);
}
@Override
public Optional alias() {
return Optional.ofNullable(alias);
}
@Override
public U as(String alias) {
U newThing = copy();
newThing.alias = alias;
return newThing;
}
@Override
public Optional jdbcType() {
return column.jdbcType();
}
@Override
public Optional typeHandler() {
return column.typeHandler();
}
protected abstract U copy();
}