net.kemitix.checkstyle.ruleset.builder.CheckstyleWriter.java Source code

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Here is the source code for net.kemitix.checkstyle.ruleset.builder.CheckstyleWriter.java

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/*
The MIT License (MIT)
    
Copyright (c) 2016 Paul Campbell
    
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
    
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
    
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

package net.kemitix.checkstyle.ruleset.builder;

import com.speedment.common.mapstream.MapStream;
import lombok.NonNull;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import lombok.val;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.util.Arrays;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.Stream;

/**
 * Writes the Checkstyle XML files.
 *
 * @author Paul Campbell (pcampbell@kemitix.net)
 */
@Slf4j
@Component
@RequiredArgsConstructor
class CheckstyleWriter implements CommandLineRunner {

    private static final String NEWLINE = System.getProperty("line.separator");

    private final OutputProperties outputProperties;

    private final TemplateProperties templateProperties;

    private final RulesProperties rulesProperties;

    @Override
    public void run(final String... args) throws Exception {
        Stream.of(RuleLevel.values()).filter(level -> !level.equals(RuleLevel.UNSPECIFIED))
                .forEach(this::writeCheckstyleFile);
    }

    private void writeCheckstyleFile(@NonNull final RuleLevel ruleLevel) {
        val xmlFile = outputProperties.getDirectory().resolve(outputProperties.getRulesetFiles().get(ruleLevel));
        val checkerRules = rulesProperties.getRules().stream().filter(Rule::isEnabled)
                .filter(rule -> RuleParent.CHECKER.equals(rule.getParent()))
                .filter(rule -> ruleLevel.compareTo(rule.getLevel()) >= 0).map(this::formatRuleAsModule)
                .collect(Collectors.joining(NEWLINE));
        val treeWalkerRules = rulesProperties.getRules().stream().filter(Rule::isEnabled)
                .filter(rule -> RuleParent.TREEWALKER.equals(rule.getParent()))
                .filter(rule -> ruleLevel.compareTo(rule.getLevel()) >= 0).map(this::formatRuleAsModule)
                .collect(Collectors.joining(NEWLINE));
        try {
            val checkstyleXmlTemplate = templateProperties.getCheckstyleXml();
            if (checkstyleXmlTemplate.toFile().exists()) {
                val bytes = Files.readAllBytes(checkstyleXmlTemplate);
                val template = new String(bytes, StandardCharsets.UTF_8);
                val output = Arrays.asList(String.format(template, checkerRules, treeWalkerRules).split(NEWLINE));
                log.info("Writing xmlFile: {}", xmlFile);
                Files.write(xmlFile, output, StandardCharsets.UTF_8);
            } else {
                throw new IOException("Missing template: " + checkstyleXmlTemplate.toString());
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    private String formatRuleAsModule(final Rule rule) {
        if (rule.getProperties().isEmpty()) {
            return String.format("<module name=\"%s\"/>", rule.getName());
        }
        return String.format("<module name=\"%s\">%n    %s%n</module>", rule.getName(),
                formatProperties(rule.getProperties()));
    }

    private String formatProperties(final Map<String, String> properties) {
        return MapStream.of(properties).map((k, v) -> String.format("<property name=\"%s\" value=\"%s\"/>", k, v))
                .collect(Collectors.joining(NEWLINE));
    }
}