Apache ShardingSphere 代码格式化实战 —— Spotless

user@machine repo % mvn spotless:check
[ERROR]  > The following files had format violations:
[ERROR]  src\main\java\com\diffplug\gradle\spotless\FormatExtension.java
[ERROR]    -\t\t····if·(targets.length·==·0)·{
[ERROR]    +\t\tif·(targets.length·==·0)·{
[ERROR]  Run 'mvn spotless:apply' to fix these violations.
user@machine repo % mvn spotless:apply
[INFO] BUILD SUCCESS
user@machine repo % mvn spotless:check
[INFO] BUILD SUCCESS

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<profiles version="13">
    <profile kind="CodeFormatterProfile" name="'ShardingSphere Apache Current'" version="13">
        <setting id="org.eclipse.jdt.core.compiler.source" value="1.8"/>
        <setting id="org.eclipse.jdt.core.compiler.compliance" value="1.8"/>
        <setting id="org.eclipse.jdt.core.compiler.codegen.targetPlatform" value="1.8"/>
        <setting id="org.eclipse.jdt.core.formatter.indent_empty_lines" value="true"/>
        <setting id="org.eclipse.jdt.core.formatter.tabulation.size" value="4"/>
        <setting id="org.eclipse.jdt.core.formatter.lineSplit" value="200"/>
        <setting id="org.eclipse.jdt.core.formatter.comment.line_length" value="200"/>
        <setting id="org.eclipse.jdt.core.formatter.tabulation.char" value="space"/>
        <setting id="org.eclipse.jdt.core.formatter.indentation.size" value="1"/>
        <setting id="org.eclipse.jdt.core.formatter.comment.format_javadoc_comments" value="false"/>
        <setting id="org.eclipse.jdt.core.formatter.join_wrapped_lines" value="false"/>
        <setting id="org.eclipse.jdt.core.formatter.insert_space_before_colon_in_conditional" value="insert"/>
        <setting id="org.eclipse.jdt.core.formatter.insert_space_before_colon_in_default" value="do not insert"/>
        <setting id="org.eclipse.jdt.core.formatter.alignment_for_enum_constants" value="16"/>
        <setting id="org.eclipse.jdt.core.formatter.insert_space_before_colon_in_labeled_statement" value="do not insert"/>
        <setting id="org.eclipse.jdt.core.formatter.insert_space_before_colon_in_case" value="do not insert"/>
        <setting id="org.eclipse.jdt.core.formatter.alignment_for_conditional_expression" value="80"/>
        <setting id="org.eclipse.jdt.core.formatter.alignment_for_assignment" value="16"/>
        <setting id="org.eclipse.jdt.core.formatter.blank_lines_after_package" value="1"/>
        <setting id="org.eclipse.jdt.core.formatter.continuation_indentation_for_array_initializer" value="2"/>
        <setting id="org.eclipse.jdt.core.formatter.alignment_for_resources_in_try" value="160"/>
        <setting id="org.eclipse.jdt.core.formatter.alignment_for_throws_clause_in_method_declaration" value="10"/>
        <setting id="org.eclipse.jdt.core.formatter.alignment_for_parameters_in_method_declaration" value="106"/>
        <setting id="org.eclipse.jdt.core.formatter.alignment_for_parameters_in_constructor_declaration" value="106"/>
        <setting id="org.eclipse.jdt.core.formatter.alignment_for_throws_clause_in_constructor_declaration" value="106"/>
        <setting id="org.eclipse.jdt.core.formatter.alignment_for_arguments_in_explicit_constructor_call.count_dependent" value="16|5|80"/>
    </profile>
</profiles>

<plugin>
    <groupId>com.diffplug.spotless</groupId>
    <artifactId>spotless-maven-plugin</artifactId>
    <version>2.22.1</version>
    <configuration>
        <java>
            <eclipse>
                <file>${maven.multiModuleProjectDirectory}/src/resources/shardingsphere_eclipse_formatter.xml</file>
            </eclipse>
            <licenseHeader>
                <file>${maven.multiModuleProjectDirectory}/src/resources/license-header</file>
            </licenseHeader>
        </java>
    </configuration>
</plugin>

user@machine repo % mvn spotless:apply
[INFO] BUILD SUCCESS
user@machine repo % mvn spotless:check
[INFO] BUILD SUCCESS

<plugin>
    <>com.diffplug.spotless</groupId>
    <artifactId>spotless-maven-plugin</artifactId>
    <version>2.22.1</version>
    <configuration>
        <java>
            <eclipse>
                <file>${maven.multiModuleProjectDirectory}/src/resources/shardingsphere_eclipse_formatter.xml</file>
            </eclipse>
            <licenseHeader>
                <file>${maven.multiModuleProjectDirectory}/src/resources/license-header</file>
            </licenseHeader>
        </java>
    </configuration>
    <executions>
        <execution>
            <goals>
                <goal>apply</goal>
            </goals>
            <phase>compile</phase>
        </execution>
    </executions>
</plugin>

private static Collection<PreciseHintShadowValue<Comparable<?>>> createNoteShadowValues(final ShadowDetermineCondition shadowDetermineCondition) {
    // Checkstyle 可以通过的格式
    return shadowDetermineCondition.getSqlComments().stream().<PreciseHintShadowValue<Comparable<?>>>map(
        each -> new PreciseHintShadowValue<>(tableName, shadowOperationType, each)).collect(Collectors.toList());
    // Spotless 格式化后
    return shadowDetermineCondition.getSqlComments().stream().<PreciseHintShadowValue<Comparable<?>>>map(
            each -> new PreciseHintShadowValue<>(tableName, shadowOperationType, each)).collect(Collectors.toList());
}