org.automagic.deps.doctor.DependenciesDoctor.java Source code

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Here is the source code for org.automagic.deps.doctor.DependenciesDoctor.java

Source

/*
 * Copyright 2015 Jose Carrizo
 * Licensed under the Apache License, Version 2.0 
 * See accompanying file LICENSE or get a copy at http://www.apache.org/licenses/LICENSE-2.0
 */
package org.automagic.deps.doctor;

import java.util.ArrayList;
import java.util.List;

import org.automagic.deps.doctor.filter.DependenciesFilter;
import org.automagic.deps.doctor.spy.PomSpy;

import com.google.common.base.Optional;

public class DependenciesDoctor {

    private final PomSpy pomSpy;
    private final boolean honorTopDependencies;
    private final DependenciesFilter filter;

    public DependenciesDoctor(PomSpy pomSpy, boolean honorTopDependencies, DependenciesFilter filter) {
        this.pomSpy = pomSpy;
        this.honorTopDependencies = honorTopDependencies;
        this.filter = filter;
    }

    @SuppressWarnings("unchecked")
    public Optional<List<TransitiveDependency>> getAntidote() {

        List<TransitiveDepsGroup> transitiveDepsGroups = pomSpy.getTransitiveDepsGroups();
        List<TransitiveDepsGroup> conflictingDepsGroups = getConflictingDepsGroups(transitiveDepsGroups);

        if (conflictingDepsGroups.isEmpty()) {
            return Optional.absent();
        }

        List<TransitiveDependency> list = new ArrayList<>();
        Optional<List<TransitiveDependency>> antidote = Optional.of(list);

        for (TransitiveDepsGroup group : conflictingDepsGroups) {

            // search the dependency with the highest version in the group
            TransitiveDependency antidoteDep = group.getDependencies().get(0);
            for (TransitiveDependency dependency : group.getDependencies()) {
                if (dependency.getVersion().compareTo(antidoteDep.getVersion()) > 0) {
                    antidoteDep = dependency;
                }
            }

            list.add(antidoteDep);
        }

        return antidote;
    }

    private List<TransitiveDepsGroup> getConflictingDepsGroups(List<TransitiveDepsGroup> transitiveDepsGroups) {

        List<TransitiveDepsGroup> conflicting = new ArrayList<>();
        for (TransitiveDepsGroup group : transitiveDepsGroups) {

            Optional<TransitiveDependency> topDependency = group.getTopLevelDependency();
            if (honorTopDependencies && topDependency.isPresent() && !topDependency.get().wasAddedByPlugin()) {
                continue;
            }

            if (filter.isExcluded(group.getGroupId(), group.getArtifactId())) {
                continue;
            }

            if (containsConflicts(group)) {
                conflicting.add(group);
            }
        }

        return conflicting;
    }

    @SuppressWarnings("unchecked")
    private boolean containsConflicts(TransitiveDepsGroup group) {

        // search the dependency nearest to the root of the dependency tree
        TransitiveDependency nearestToRoot = group.getDependencies().get(0);
        for (TransitiveDependency dependency : group.getDependencies()) {
            if (dependency.getHopCount() < nearestToRoot.getHopCount()) {
                nearestToRoot = dependency;
            }
        }

        for (TransitiveDependency dependency : group.getDependencies()) {
            if (nearestToRoot.getManagedVersion().compareTo(dependency.getVersion()) < 0) {
                return true;
            }
        }

        return false;
    }

}