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Antlr4FormatterStep.java
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Antlr4FormatterStep.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.antlr4;
import java.io.Serializable;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import com.diffplug.spotless.FormatterFunc;
import com.diffplug.spotless.FormatterStep;
import com.diffplug.spotless.JarState;
import com.diffplug.spotless.Provisioner;
import com.diffplug.spotless.ThrowingEx;
public class Antlr4FormatterStep implements Serializable {
private static final long serialVersionUID = 1L;
private static final String MAVEN_COORDINATE = "com.khubla.antlr4formatter:antlr4-formatter:";
private static final String DEFAULT_VERSION = "1.2.1";
public static final String NAME = "antlr4Formatter";
private final JarState.Promised jarState;
private Antlr4FormatterStep(JarState.Promised jarState) {
this.jarState = jarState;
}
public static FormatterStep create(Provisioner provisioner) {
return create(defaultVersion(), provisioner);
}
public static FormatterStep create(String version, Provisioner provisioner) {
return FormatterStep.create(NAME,
new Antlr4FormatterStep(JarState.promise(() -> JarState.from(MAVEN_COORDINATE version, provisioner))),
Antlr4FormatterStep::equalityState,
State::createFormat);
}
public static String defaultVersion() {
return DEFAULT_VERSION;
}
private State equalityState() {
return new State(jarState.get());
}
private static final class State implements Serializable {
private static final long serialVersionUID = 1L;
private final JarState jarState;
State(JarState jarState) {
this.jarState = jarState;
}
FormatterFunc createFormat() throws ClassNotFoundException, NoSuchMethodException {
ClassLoader classLoader = jarState.getClassLoader();
// String Antlr4Formatter::format(String input)
Class<?> formatter = classLoader.loadClass("com.khubla.antlr4formatter.Antlr4Formatter");
Method formatterMethod = formatter.getMethod("format", String.class);
return input -> {
try {
return (String) formatterMethod.invoke(null, input);
} catch (InvocationTargetException e) {
throw ThrowingEx.unwrapCause(e);
}
};
}
}
}