com.diffplug.spotless.maven.generic.LicenseHeader Maven / Gradle / Ivy

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/*
 * Copyright 2016 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.maven.generic;

import java.io.File;

import org.apache.maven.plugins.annotations.Parameter;

import com.diffplug.spotless.FormatterStep;
import com.diffplug.spotless.generic.LicenseHeaderStep;
import com.diffplug.spotless.maven.FormatterStepConfig;
import com.diffplug.spotless.maven.FormatterStepFactory;

public class LicenseHeader implements FormatterStepFactory {

	@Parameter
	private String file;

	@Parameter
	private String content;

	@Parameter
	private String delimiter;

	@Override
	public final FormatterStep newFormatterStep(FormatterStepConfig config) {
		String delimiterString = delimiter != null ? delimiter : config.getLicenseHeaderDelimiter();
		if (delimiterString == null) {
			throw new IllegalArgumentException("You need to specify 'delimiter'.");
		}

		if (file != null ^ content != null) {
			FormatterStep step = file != null
					? createStepFromFile(config, delimiterString)
					: createStepFromContent(delimiterString);

			return step.filterByFile(LicenseHeaderStep.unsupportedJvmFilesFilter());
		} else {
			throw new IllegalArgumentException("Must specify exactly one of 'file' or 'content'.");
		}
	}

	private FormatterStep createStepFromFile(FormatterStepConfig config, String delimiterString) {
		File licenseHeaderFile = config.getFileLocator().locateFile(file);
		return LicenseHeaderStep.createFromFile(licenseHeaderFile, config.getEncoding(), delimiterString);
	}

	private FormatterStep createStepFromContent(String delimiterString) {
		return LicenseHeaderStep.createFromHeader(content, delimiterString);
	}
}