net.kemitix.dependency.digraph.maven.plugin.DefaultSourceFileAnalyser Maven / Gradle / Ivy

/*
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.dependency.digraph.maven.plugin;

import com.github.javaparser.JavaParser;
import com.github.javaparser.ParseException;
import com.github.javaparser.ast.CompilationUnit;
import com.github.javaparser.ast.ImportDeclaration;
import com.github.javaparser.ast.PackageDeclaration;

import java.io.InputStream;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.annotation.concurrent.Immutable;
import javax.inject.Inject;

/**
 * Analyses a Java source file for package and import statements.
 *
 * @author Paul Campbell ([email protected])
 */
@Immutable
class DefaultSourceFileAnalyser implements SourceFileAnalyser {

    private static final Pattern METHOD_IMPORT = Pattern.compile(
            "^(?.+)\\.(?.+)\\.(?.+)");

    private static final Pattern CLASS_IMPORT = Pattern.compile(
            "^(?.+)\\.(?.+)");

    private final DigraphMojo mojo;

    /**
     * Constructor.
     *
     * @param mojo The Maven Mojo
     */
    @Inject
    DefaultSourceFileAnalyser(final DigraphMojo mojo) {
        this.mojo = mojo;
    }

    @Override
    public void analyse(
            final DependencyData dependencyData,
            final InputStream inputStream) {
        try {
            CompilationUnit cu = JavaParser.parse(inputStream);
            final PackageDeclaration aPackage = cu.getPackage();
            if (aPackage != null) {
                analyseUnit(aPackage, cu, dependencyData);
            }
        } catch (ParseException ex) {
            mojo.getLog().error("Error parsing file " + inputStream, ex);
        }

    }

    private void analyseUnit(
            final PackageDeclaration aPackage, final CompilationUnit cu,
            final DependencyData dependencyData) {
        String packageName = aPackage.getName().toString();
        cu.getImports().forEach((ImportDeclaration id) -> {
            final String name = id.getName().toString();
            Matcher m;
            if (id.isStatic() && !id.isAsterisk()) {
                m = METHOD_IMPORT.matcher(name);
            } else {
                m = CLASS_IMPORT.matcher(name);
            }
            if (m.find()) {
                dependencyData.addDependency(packageName, m.group("package"));
            }
        });
    }
}