org.mybatis.dynamic.sql.AbstractListValueCondition Maven / Gradle / Ivy

/**
 *    Copyright 2016-2019 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;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Objects;
import java.util.function.Function;
import java.util.function.UnaryOperator;
import java.util.stream.Stream;

public abstract class AbstractListValueCondition implements VisitableCondition {
    protected Collection values;
    protected UnaryOperator> valueStreamTransformer;

    protected AbstractListValueCondition(Collection values) {
        this(values, UnaryOperator.identity());
    }

    protected AbstractListValueCondition(Collection values, UnaryOperator> valueStreamTransformer) {
        this.values = new ArrayList<>(Objects.requireNonNull(values));
        this.valueStreamTransformer = Objects.requireNonNull(valueStreamTransformer);
    }
    
    public final  Stream mapValues(Function mapper) {
        return valueStreamTransformer.apply(values.stream()).map(mapper);
    }
    
    @Override
    public  R accept(ConditionVisitor visitor) {
        return visitor.visit(this);
    }

    public abstract String renderCondition(String columnName, Stream placeholders);
}