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Upgrade to Eclipse 2021-09 and support Eclipse 2021-03
Restructure codebase to support Eclipse 2021-03 (compatible with Java 8) and Eclipse 2021-09 (requires Java 11) simultaneously. By default the Eclipse 2021-09 formatter is used. This commit changes the default Java baseline of the formatter to Java 11, however, Java 8 is still supported if a custom `.springjavaformatconfig` is defined with a `java-baseline` property of `8`. Closes gh-277
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‎README.adoc‎

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@@ -188,6 +188,19 @@ Your `checkstyle.xml` file should look then like this:
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=== Java 8 Support
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By default, the formatter requires Java 11.
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If you are working on an older project, you can use a variation of the formatter based off Eclipse 2021-03 (the latest Eclipse JDT version built with Java 8).
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To use the Java 8 version, add a file called `.springjavaformatconfig` to the root of your project with the following content:
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[source,properties]
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----
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java-baseline=8
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----
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=== Eclipse
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The Eclipse plugin provides a custom formatter implementation and automatically applies project specific settings.
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The plugin is automatically activated whenever the Maven or Gradle plugins are discovered in a project build script.

‎pom.xml‎

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<main.basedir>${basedir}</main.basedir>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<java.version>1.8</java.version>
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<eclipse.repository>https://download.eclipse.org/releases/2021-03/202103171000/</eclipse.repository>
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<eclipse.jdk8.repository>https://download.eclipse.org/releases/2021-03/202103171000/</eclipse.jdk8.repository>
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<eclipse.jdk11.repository>https://download.eclipse.org/releases/2021-09/202109151000/</eclipse.jdk11.repository>
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<eclipse.checkstyle.repository>https://checkstyle.org/eclipse-cs-update-site/</eclipse.checkstyle.repository>
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<tycho.disableP2Mirrors>true</tycho.disableP2Mirrors>
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<ant.version>1.8.1</ant.version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<repositories>
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<repository>
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<id>eclipse</id>
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<layout>p2</layout>
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<url>${eclipse.repository}</url>
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</repository>
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<repository>
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<id>eclipse-checkstyle</id>
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<layout>p2</layout>
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<url>${eclipse.checkstyle.repository}</url>
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</repository>
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</repositories>
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<modules>
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<module>spring-javaformat</module>
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<module>spring-javaformat-maven</module>

‎spring-javaformat-eclipse/io.spring.javaformat.eclipse.tests/src/io/spring/javaformat/eclipse/projectsettings/ProjectSettingsFilesLocatorTests.java‎

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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.io.TempDir;
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import io.spring.javaformat.config.IndentationStyle;
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import io.spring.javaformat.config.JavaBaseline;
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import io.spring.javaformat.config.JavaFormatConfig;
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import static org.assertj.core.api.Assertions.assertThat;
@@ -82,19 +84,19 @@ public void jdtCorePrefsFormatterWhenDefaultShouldUseTabs() throws IOException {
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Properties properties = new Properties();
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properties.load(content);
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assertThat(properties.get("org.eclipse.jdt.core.javaFormatter"))
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.isEqualTo("io.spring.javaformat.eclipse.formatter");
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.isEqualTo("io.spring.javaformat.eclipse.formatter.jdk11.tabs");
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}
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}
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@Test
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public void jdtCorePrefsFormatterWhenSpacesShouldUseSpaces() throws IOException {
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ProjectSettingsFiles files = new ProjectSettingsFilesLocator().locateSettingsFiles();
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ProjectSettingsFile file = get(files, "org.eclipse.jdt.core.prefs");
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try (InputStream content = file.getContent(JavaFormatConfig.SPACES)) {
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try (InputStream content = file.getContent(JavaFormatConfig.of(JavaBaseline.V8, IndentationStyle.SPACES))) {
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Properties properties = new Properties();
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properties.load(content);
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assertThat(properties.get("org.eclipse.jdt.core.javaFormatter"))
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.isEqualTo("io.spring.javaformat.eclipse.formatter.spaces");
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.isEqualTo("io.spring.javaformat.eclipse.formatter.jdk8.spaces");
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}
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}
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‎spring-javaformat-eclipse/io.spring.javaformat.eclipse/plugin.xml‎

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<plugin>
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<extension point="org.eclipse.jdt.core.javaFormatter">
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<javaFormatter
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class="io.spring.javaformat.eclipse.formatter.SpringCodeFormatterTabs"
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id="io.spring.javaformat.eclipse.formatter"
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name="Spring (tab indented)">
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class="io.spring.javaformat.eclipse.formatter.SpringCodeFormatterJdk11Tabs"
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id="io.spring.javaformat.eclipse.formatter.jdk11.tabs"
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name="Spring (tabs)">
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</javaFormatter>
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<javaFormatter
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class="io.spring.javaformat.eclipse.formatter.SpringCodeFormatterSpaces"
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id="io.spring.javaformat.eclipse.formatter.spaces"
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name="Spring (space indented)">
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class="io.spring.javaformat.eclipse.formatter.SpringCodeFormatterJdk11Spaces"
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id="io.spring.javaformat.eclipse.formatter.jdk11.spaces"
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name="Spring (spaces)">
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</javaFormatter>
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<javaFormatter
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class="io.spring.javaformat.eclipse.formatter.SpringCodeFormatterJdk8Tabs"
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id="io.spring.javaformat.eclipse.formatter.jdk8.tabs"
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name="Spring (tabs) [Java 8 baseline]">
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</javaFormatter>
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<javaFormatter
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class="io.spring.javaformat.eclipse.formatter.SpringCodeFormatterJdk8Spaces"
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id="io.spring.javaformat.eclipse.formatter.jdk8.spaces"
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name="Spring (spaces) [Java 8 baseline]">
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</javaFormatter>
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</extension>
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<extension point="org.eclipse.m2e.core.projectConfigurators">
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<configurator
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<configurator
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class="io.spring.javaformat.eclipse.m2e.MavenProjectSettingsConfigurator"
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id="io.spring.javaformat.eclipse.m2e.configurator"
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runsAfter="org.eclipse.m2e.jdt.javaConfigurator">

‎spring-javaformat-eclipse/io.spring.javaformat.eclipse/pom.xml‎

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</additionalDependency>
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<additionalDependency>
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<groupId>io.spring.javaformat</groupId>
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<artifactId>spring-javaformat-formatter-eclipse</artifactId>
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<artifactId>spring-javaformat-formatter-eclipse-jdt-jdk8</artifactId>
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<version>${project.version}</version>
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</additionalDependency>
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</additionalDependencies>

‎spring-javaformat-eclipse/io.spring.javaformat.eclipse/src/io/spring/javaformat/eclipse/formatter/SpringCodeFormatterJdk11Spaces.java‎

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/*
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* Copyright 2017-2021 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package io.spring.javaformat.eclipse.formatter;
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import org.eclipse.jdt.core.formatter.CodeFormatter;
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import io.spring.javaformat.config.IndentationStyle;
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import io.spring.javaformat.config.JavaBaseline;
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import io.spring.javaformat.config.JavaFormatConfig;
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/**
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* Eclipse {@link CodeFormatter} for Spring formatting with spaces.
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*
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* @author Phillip Webb
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*/
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public class SpringCodeFormatterJdk11Spaces extends SpringCodeFormatter {
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public SpringCodeFormatterJdk11Spaces() {
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super(JavaFormatConfig.of(JavaBaseline.V11, IndentationStyle.SPACES));
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}
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}

‎spring-javaformat-eclipse/io.spring.javaformat.eclipse/src/io/spring/javaformat/eclipse/formatter/SpringCodeFormatterJdk11Tabs.java‎

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/*
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* Copyright 2017-2021 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package io.spring.javaformat.eclipse.formatter;
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import org.eclipse.jdt.core.formatter.CodeFormatter;
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import io.spring.javaformat.config.IndentationStyle;
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import io.spring.javaformat.config.JavaBaseline;
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import io.spring.javaformat.config.JavaFormatConfig;
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/**
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* Eclipse {@link CodeFormatter} for Spring formatting with tabs.
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*
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* @author Phillip Webb
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*/
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public class SpringCodeFormatterJdk11Tabs extends SpringCodeFormatter {
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public SpringCodeFormatterJdk11Tabs() {
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super(JavaFormatConfig.of(JavaBaseline.V11, IndentationStyle.SPACES));
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}
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}

‎spring-javaformat-eclipse/io.spring.javaformat.eclipse/src/io/spring/javaformat/eclipse/formatter/SpringCodeFormatterSpaces.java‎ renamed to ‎spring-javaformat-eclipse/io.spring.javaformat.eclipse/src/io/spring/javaformat/eclipse/formatter/SpringCodeFormatterJdk8Spaces.java‎

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import org.eclipse.jdt.core.formatter.CodeFormatter;
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import io.spring.javaformat.config.IndentationStyle;
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import io.spring.javaformat.config.JavaBaseline;
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import io.spring.javaformat.config.JavaFormatConfig;
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/**
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* Eclipse {@link CodeFormatter} for Spring formatting with spaces.
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*
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* @author Phillip Webb
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*/
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public class SpringCodeFormatterSpaces extends SpringCodeFormatter {
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public class SpringCodeFormatterJdk8Spaces extends SpringCodeFormatter {
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public SpringCodeFormatterSpaces() {
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super(JavaFormatConfig.SPACES);
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public SpringCodeFormatterJdk8Spaces() {
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super(JavaFormatConfig.of(JavaBaseline.V8, IndentationStyle.SPACES));
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}
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}

‎spring-javaformat-eclipse/io.spring.javaformat.eclipse/src/io/spring/javaformat/eclipse/formatter/SpringCodeFormatterTabs.java‎ renamed to ‎spring-javaformat-eclipse/io.spring.javaformat.eclipse/src/io/spring/javaformat/eclipse/formatter/SpringCodeFormatterJdk8Tabs.java‎

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import org.eclipse.jdt.core.formatter.CodeFormatter;
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import io.spring.javaformat.config.IndentationStyle;
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import io.spring.javaformat.config.JavaBaseline;
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import io.spring.javaformat.config.JavaFormatConfig;
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/**
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* Eclipse {@link CodeFormatter} for Spring formatting with tabs.
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*
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* @author Phillip Webb
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*/
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public class SpringCodeFormatterTabs extends SpringCodeFormatter {
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public class SpringCodeFormatterJdk8Tabs extends SpringCodeFormatter {
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public SpringCodeFormatterTabs() {
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super(JavaFormatConfig.DEFAULT);
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public SpringCodeFormatterJdk8Tabs() {
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super(JavaFormatConfig.of(JavaBaseline.V8, IndentationStyle.SPACES));
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}
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}

‎spring-javaformat-eclipse/io.spring.javaformat.eclipse/src/io/spring/javaformat/eclipse/projectsettings/ProjectSettingsFilesLocator.java‎

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import java.util.LinkedHashMap;
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import java.util.Map;
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import io.spring.javaformat.config.IndentationStyle;
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import io.spring.javaformat.config.JavaFormatConfig;
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/**
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}
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private String updateFormatter(JavaFormatConfig javaFormatConfig, String content) {
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if (javaFormatConfig.getIndentationStyle() == IndentationStyle.SPACES) {
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return content.replace("org.eclipse.jdt.core.javaFormatter=io.spring.javaformat.eclipse.formatter",
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"org.eclipse.jdt.core.javaFormatter=io.spring.javaformat.eclipse.formatter.spaces");
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String formatterId = getFormatterId(javaFormatConfig);
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if (formatterId != null) {
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return content.replace(
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"org.eclipse.jdt.core.javaFormatter=io.spring.javaformat.eclipse.formatter.jdk11.tabs",
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"org.eclipse.jdt.core.javaFormatter=" + formatterId);
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}
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return content;
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}
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private String getFormatterId(JavaFormatConfig config) {
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String jdk = config.getJavaBaseline().name().substring(1);
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String indentation = config.getIndentationStyle().name().toLowerCase();
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return "io.spring.javaformat.eclipse.formatter.jdk" + jdk + "." + indentation;
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}
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private void add(ProjectProperties projectProperties, Map<String, ProjectSettingsFile> files, File folder)
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throws IOException {
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if (folder.exists() && folder.isDirectory()) {

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