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PalantirJavaFormatStep.java
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/
PalantirJavaFormatStep.java
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/*
* Copyright 2016-2024 DiffPlug
*
* 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 com.diffplug.spotless.java;
import java.io.Serializable;
import java.lang.reflect.Constructor;
import java.util.Objects;
import com.diffplug.spotless.*;
/** Wraps up <a href="https://github.com/palantir/palantir-java-format">palantir-java-format</a> fork of
* <a href="https://github.com/google/google-java-format">google-java-format</a> as a FormatterStep. */
public class PalantirJavaFormatStep implements java.io.Serializable {
private static final long serialVersionUID = 1L;
private static final boolean DEFAULT_FORMAT_JAVADOC = false;
private static final String DEFAULT_STYLE = "PALANTIR";
private static final String NAME = "palantir-java-format";
public static final String MAVEN_COORDINATE = "com.palantir.javaformat:palantir-java-format:";
private static final Jvm.Support<String> JVM_SUPPORT = Jvm.<String> support(NAME).add(8, "1.1.0").add(11, "2.28.0").add(21, "2.39.0");
/** The jar that contains the formatter. */
private final JarState.Promised jarState;
/** Version of the formatter jar. */
private final String formatterVersion;
private final String style;
/** Whether to format Java docs. */
private final boolean formatJavadoc;
private PalantirJavaFormatStep(JarState.Promised jarState,
String formatterVersion,
String style,
boolean formatJavadoc) {
this.jarState = jarState;
this.formatterVersion = formatterVersion;
this.style = style;
this.formatJavadoc = formatJavadoc;
}
/** Creates a step which formats everything - code, import order, and unused imports. */
public static FormatterStep create(Provisioner provisioner) {
return create(defaultVersion(), provisioner);
}
/** Creates a step which formats everything - code, import order, and unused imports. */
public static FormatterStep create(String version, Provisioner provisioner) {
return create(version, defaultStyle(), provisioner);
}
/**
* Creates a step which formats code, import order, and unused imports, but not Java docs. And with the given format
* style.
*/
public static FormatterStep create(String version, String style, Provisioner provisioner) {
return create(version, style, DEFAULT_FORMAT_JAVADOC, provisioner);
}
/**
* Creates a step which formats everything - code, import order, unused imports, and Java docs. And with the given
* format style.
*/
public static FormatterStep create(String version, String style, boolean formatJavadoc, Provisioner provisioner) {
Objects.requireNonNull(version, "version");
Objects.requireNonNull(style, "style");
Objects.requireNonNull(provisioner, "provisioner");
return FormatterStep.create(NAME,
new PalantirJavaFormatStep(JarState.promise(() -> JarState.from(MAVEN_COORDINATE + version, provisioner)), version, style, formatJavadoc),
PalantirJavaFormatStep::equalityState,
State::createFormat);
}
/** Get default formatter version */
public static String defaultVersion() {
return JVM_SUPPORT.getRecommendedFormatterVersion();
}
/** Get default style */
public static String defaultStyle() {
return DEFAULT_STYLE;
}
/** Get default for whether Java docs should be formatted */
public static boolean defaultFormatJavadoc() {
return DEFAULT_FORMAT_JAVADOC;
}
private State equalityState() {
return new State(jarState.get(), formatterVersion, style, formatJavadoc);
}
private static final class State implements Serializable {
private static final long serialVersionUID = 1L;
private final JarState jarState;
private final String formatterVersion;
private final String style;
private final boolean formatJavadoc;
State(JarState jarState, String formatterVersion, String style, boolean formatJavadoc) {
ModuleHelper.doOpenInternalPackagesIfRequired();
this.jarState = jarState;
this.formatterVersion = formatterVersion;
this.style = style;
this.formatJavadoc = formatJavadoc;
}
FormatterFunc createFormat() throws Exception {
final ClassLoader classLoader = jarState.getClassLoader();
final Class<?> formatterFunc = classLoader.loadClass("com.diffplug.spotless.glue.pjf.PalantirJavaFormatFormatterFunc");
// 1st arg is "style", 2nd arg is "formatJavadoc"
final Constructor<?> constructor = formatterFunc.getConstructor(String.class, boolean.class);
return JVM_SUPPORT.suggestLaterVersionOnError(formatterVersion, (FormatterFunc) constructor.newInstance(style, formatJavadoc));
}
}
}