com.soebes.maven.extensions.incremental.ModuleCalculator.java Source code

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Here is the source code for com.soebes.maven.extensions.incremental.ModuleCalculator.java

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package com.soebes.maven.extensions.incremental;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

import java.io.File;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

import org.apache.maven.project.MavenProject;
import org.apache.maven.scm.ScmFile;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Karl Heinz Marbaise <khmarbaise@apache.org>
 */
public class ModuleCalculator {
    private final Logger logger = LoggerFactory.getLogger(getClass().getName());

    private List<MavenProject> projectList;

    private List<ScmFile> changeList;

    /**
     * @param projectList The list of Maven Projects which are in the reactor.
     * @param changeList The list of changes within this structure.
     */
    public ModuleCalculator(List<MavenProject> projectList, List<ScmFile> changeList) {
        this.projectList = Objects.requireNonNull(projectList, "projectList is not allowed to be null.");
        this.changeList = Objects.requireNonNull(changeList, "changeList is not allowed to be null.");
    }

    /**
     * Calculate the modules which needed to be rebuilt based on the list of changes from SCM.
     * 
     * @param projectRootpath Root path of the project.
     * @return The list of modules which needed to be rebuilt.
     */
    public List<MavenProject> calculateChangedModules(Path projectRootpath) {
        // TODO: Think about if we got only pom packaging modules? Do we
        // need to do something special there?
        List<MavenProject> result = new ArrayList<>();
        for (MavenProject project : projectList) {
            Path relativize = projectRootpath.relativize(project.getBasedir().toPath());
            for (ScmFile fileItem : changeList) {
                boolean startsWith = new File(fileItem.getPath()).toPath().startsWith(relativize);
                logger.debug("startswith: " + startsWith + " " + fileItem.getPath() + " " + relativize);
                if (startsWith) {
                    if (!result.contains(project)) {
                        result.add(project);
                    }
                }
            }
        }
        return result;
    }

}