AstParser.java

package com.github.signed.pmd;

import java.io.StringReader;

import com.github.signed.pmd.rules.AlwaysComplain;

import net.sourceforge.pmd.PMD;
import net.sourceforge.pmd.PMDConfiguration;
import net.sourceforge.pmd.PMDException;
import net.sourceforge.pmd.Report;
import net.sourceforge.pmd.RuleContext;
import net.sourceforge.pmd.RuleSet;
import net.sourceforge.pmd.lang.LanguageVersion;
import net.sourceforge.pmd.lang.LanguageVersionHandler;
import net.sourceforge.pmd.lang.Parser;
import net.sourceforge.pmd.lang.VisitorStarter;
import net.sourceforge.pmd.lang.ast.Node;
import net.sourceforge.pmd.lang.java.Java17Handler;
import net.sourceforge.pmd.lang.java.JavaLanguageModule;
import net.sourceforge.pmd.lang.java.ast.JavaNode;
import net.sourceforge.pmd.lang.java.ast.ParseException;

public class AstParser {

    public static final LanguageVersion JAVA_7 = new LanguageVersion(new JavaLanguageModule(), "1.7", new Java17Handler());

    public JavaNode parse(String source) throws PMDException {
        Report report = new Report();

        RuleContext ctx = new RuleContext();
        ctx.setReport(report);
        ctx.setSourceCodeFilename("n/a");
        ctx.setLanguageVersion(JAVA_7);

        RuleSet rules = new RuleSet();
        rules.addRule(new AlwaysComplain());

        PMDConfiguration configuration = new PMDConfiguration();

        configuration.setDefaultLanguageVersion(JAVA_7);

        try (StringReader sourceCode = new StringReader(source)) {
            try {
                LanguageVersion languageVersion = ctx.getLanguageVersion();
                LanguageVersionHandler languageVersionHandler = languageVersion.getLanguageVersionHandler();
                Parser parser = PMD.parserFor(languageVersion, configuration);
                Node rootNode = parser.parse(ctx.getSourceCodeFilename(), sourceCode);
                languageVersionHandler.getSymbolFacade().start(rootNode);
                languageVersion.getLanguageVersionHandler().getDataFlowFacade().start(rootNode);
                VisitorStarter typeResolutionFacade = languageVersion.getLanguageVersionHandler().getTypeResolutionFacade(configuration.getClassLoader());
                typeResolutionFacade.start(rootNode);
                return (JavaNode) rootNode;
            } catch (ParseException pe) {
                throw new PMDException("Error while parsing " + ctx.getSourceCodeFilename(), pe);
            } catch (Exception e) {
                throw new PMDException("Error while processing " + ctx.getSourceCodeFilename(), e);
            }
        }
    }
}