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/*
* SonarQube
* Copyright (C) 2009-2018 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.scanner.scan;
import com.google.common.collect.ImmutableMultimap;
import java.nio.file.Path;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import javax.annotation.CheckForNull;
import javax.annotation.concurrent.Immutable;
import org.sonar.api.batch.fs.InputModule;
import org.sonar.api.batch.fs.internal.DefaultInputModule;
import org.sonar.api.batch.fs.internal.InputModuleHierarchy;
import org.sonar.api.scan.filesystem.PathResolver;
@Immutable
public class DefaultInputModuleHierarchy implements InputModuleHierarchy {
private final DefaultInputModule root;
private final Map<DefaultInputModule, DefaultInputModule> parents;
private final ImmutableMultimap<DefaultInputModule, DefaultInputModule> children;
public DefaultInputModuleHierarchy(DefaultInputModule parent, DefaultInputModule child) {
this(Collections.singletonMap(child, parent));
}
public DefaultInputModuleHierarchy(DefaultInputModule root) {
this.children = new ImmutableMultimap.Builder<DefaultInputModule, DefaultInputModule>().build();
this.parents = Collections.emptyMap();
this.root = root;
}
/**
* Map of child->parent. Neither the Keys or values can be null.
*/
public DefaultInputModuleHierarchy(Map<DefaultInputModule, DefaultInputModule> parents) {
ImmutableMultimap.Builder<DefaultInputModule, DefaultInputModule> childrenBuilder = new ImmutableMultimap.Builder<>();
for (Map.Entry<DefaultInputModule, DefaultInputModule> e : parents.entrySet()) {
childrenBuilder.put(e.getValue(), e.getKey());
}
this.children = childrenBuilder.build();
this.parents = Collections.unmodifiableMap(new HashMap<>(parents));
this.root = findRoot(parents);
}
private static DefaultInputModule findRoot(Map<DefaultInputModule, DefaultInputModule> parents) {
DefaultInputModule r = null;
for (DefaultInputModule parent : parents.values()) {
if (!parents.containsKey(parent)) {
if (r != null && r != parent) {
throw new IllegalStateException(String.format("Found two modules without parent: '%s' and '%s'", r.key(), parent.key()));
}
r = parent;
}
}
if (r == null) {
throw new IllegalStateException("Found no root module");
}
return r;
}
@Override
public DefaultInputModule root() {
return root;
}
@Override
public Collection<DefaultInputModule> children(InputModule component) {
return children.get((DefaultInputModule) component);
}
@Override
public DefaultInputModule parent(InputModule component) {
return parents.get(component);
}
@Override
public boolean isRoot(InputModule module) {
return root.equals(module);
}
@Override
@CheckForNull
public String relativePath(InputModule module) {
DefaultInputModule parent = parent(module);
if (parent == null) {
return null;
}
DefaultInputModule inputModule = (DefaultInputModule) module;
Path parentBaseDir = parent.getBaseDir();
Path moduleBaseDir = inputModule.getBaseDir();
return PathResolver.relativize(parentBaseDir, moduleBaseDir).orElse(null);
}
}
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