org.mybatis.dynamic.sql.select.QueryExpressionModel 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.select;
import static org.mybatis.dynamic.sql.util.StringUtilities.spaceBefore;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.function.Function;
import java.util.stream.Stream;
import org.mybatis.dynamic.sql.BasicColumn;
import org.mybatis.dynamic.sql.SqlTable;
import org.mybatis.dynamic.sql.render.GuaranteedTableAliasCalculator;
import org.mybatis.dynamic.sql.render.TableAliasCalculator;
import org.mybatis.dynamic.sql.select.join.JoinModel;
import org.mybatis.dynamic.sql.where.WhereModel;
public class QueryExpressionModel {
private String connector;
private boolean isDistinct;
private List selectList;
private SqlTable table;
private JoinModel joinModel;
private TableAliasCalculator tableAliasCalculator;
private WhereModel whereModel;
private GroupByModel groupByModel;
private QueryExpressionModel(Builder builder) {
connector = builder.connector;
isDistinct = builder.isDistinct;
selectList = Objects.requireNonNull(builder.selectList);
table = Objects.requireNonNull(builder.table);
joinModel = builder.joinModel;
tableAliasCalculator = joinModel().map(jm -> GuaranteedTableAliasCalculator.of(builder.tableAliases))
.orElseGet(() -> TableAliasCalculator.of(builder.tableAliases));
whereModel = builder.whereModel;
groupByModel = builder.groupByModel;
}
public Optional connector() {
return Optional.ofNullable(connector);
}
public boolean isDistinct() {
return isDistinct;
}
public Stream mapColumns(Function mapper) {
return selectList.stream().map(mapper);
}
public SqlTable table() {
return table;
}
public TableAliasCalculator tableAliasCalculator() {
return tableAliasCalculator;
}
public Optional whereModel() {
return Optional.ofNullable(whereModel);
}
public Optional joinModel() {
return Optional.ofNullable(joinModel);
}
public Optional groupByModel() {
return Optional.ofNullable(groupByModel);
}
public String calculateTableNameIncludingAlias(SqlTable table) {
return table.tableNameAtRuntime()
+ spaceBefore(tableAliasCalculator.aliasForTable(table));
}
public static Builder withSelectList(List columnList) {
return new Builder().withSelectList(columnList);
}
public static class Builder {
private String connector;
private boolean isDistinct;
private List selectList = new ArrayList<>();
private SqlTable table;
private Map tableAliases = new HashMap<>();
private WhereModel whereModel;
private JoinModel joinModel;
private GroupByModel groupByModel;
public Builder withConnector(String connector) {
this.connector = connector;
return this;
}
public Builder withTable(SqlTable table) {
this.table = table;
return this;
}
public Builder isDistinct(boolean isDistinct) {
this.isDistinct = isDistinct;
return this;
}
public Builder withSelectColumn(BasicColumn selectColumn) {
this.selectList.add(selectColumn);
return this;
}
public Builder withSelectList(List selectList) {
this.selectList.addAll(selectList);
return this;
}
public Builder withTableAliases(Map tableAliases) {
this.tableAliases.putAll(tableAliases);
return this;
}
public Builder withWhereModel(WhereModel whereModel) {
this.whereModel = whereModel;
return this;
}
public Builder withJoinModel(JoinModel joinModel) {
this.joinModel = joinModel;
return this;
}
public Builder withGroupByModel(GroupByModel groupByModel) {
this.groupByModel = groupByModel;
return this;
}
public QueryExpressionModel build() {
return new QueryExpressionModel(this);
}
}
}