org.mybatis.dynamic.sql.where.render.CriterionRenderer 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.where.render;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;
import org.mybatis.dynamic.sql.SqlCriterion;
import org.mybatis.dynamic.sql.render.RenderingStrategy;
import org.mybatis.dynamic.sql.render.TableAliasCalculator;
import org.mybatis.dynamic.sql.util.FragmentAndParameters;
public class CriterionRenderer {
private SqlCriterion sqlCriterion;
private AtomicInteger sequence;
private RenderingStrategy renderingStrategy;
private TableAliasCalculator tableAliasCalculator;
private String parameterName;
private CriterionRenderer(Builder builder) {
sqlCriterion = Objects.requireNonNull(builder.sqlCriterion);
sequence = Objects.requireNonNull(builder.sequence);
renderingStrategy = Objects.requireNonNull(builder.renderingStrategy);
tableAliasCalculator = Objects.requireNonNull(builder.tableAliasCalculator);
parameterName = builder.parameterName;
}
public Optional render() {
Optional initialCondition = renderCondition();
List subCriteria = sqlCriterion.mapSubCriteria(this::renderSubCriterion)
.filter(Optional::isPresent)
.map(Optional::get)
.collect(Collectors.toList());
return new RenderedCriterion.Builder()
.withConnector(sqlCriterion.connector())
.withInitialCondition(initialCondition)
.withSubCriteria(subCriteria)
.build();
}
private Optional renderSubCriterion(SqlCriterion subCriterion) {
return CriterionRenderer.withCriterion(subCriterion)
.withSequence(sequence)
.withRenderingStrategy(renderingStrategy)
.withTableAliasCalculator(tableAliasCalculator)
.withParameterName(parameterName)
.build()
.render();
}
private Optional renderCondition() {
if (!sqlCriterion.condition().shouldRender()) {
return Optional.empty();
}
WhereConditionVisitor visitor = WhereConditionVisitor.withColumn(sqlCriterion.column())
.withRenderingStrategy(renderingStrategy)
.withSequence(sequence)
.withTableAliasCalculator(tableAliasCalculator)
.withParameterName(parameterName)
.build();
return sqlCriterion.condition().accept(visitor);
}
public static Builder withCriterion(SqlCriterion sqlCriterion) {
return new Builder().withCriterion(sqlCriterion);
}
public static class Builder {
private SqlCriterion sqlCriterion;
private AtomicInteger sequence;
private RenderingStrategy renderingStrategy;
private TableAliasCalculator tableAliasCalculator;
private String parameterName;
public Builder withCriterion(SqlCriterion sqlCriterion) {
this.sqlCriterion = sqlCriterion;
return this;
}
public Builder withSequence(AtomicInteger sequence) {
this.sequence = sequence;
return this;
}
public Builder withRenderingStrategy(RenderingStrategy renderingStrategy) {
this.renderingStrategy = renderingStrategy;
return this;
}
public Builder withTableAliasCalculator(TableAliasCalculator tableAliasCalculator) {
this.tableAliasCalculator = tableAliasCalculator;
return this;
}
public Builder withParameterName(String parameterName) {
this.parameterName = parameterName;
return this;
}
public CriterionRenderer build() {
return new CriterionRenderer<>(this);
}
}
}