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/*
* 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.
*/
package org.eclipse.aether.collection;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import org.eclipse.aether.RepositoryException;
import org.eclipse.aether.artifact.Artifact;
import org.eclipse.aether.graph.DependencyNode;
import org.eclipse.aether.version.VersionConstraint;
/**
* Thrown in case of an unsolvable conflict between different version constraints for a dependency.
*/
public class UnsolvableVersionConflictException extends RepositoryException {
private final transient Collection versions;
private final transient Collection> paths;
/**
* Creates a new exception with the specified paths to conflicting nodes in the dependency graph.
*
* @param paths The paths to the dependency nodes that participate in the version conflict, may be {@code null}.
*/
public UnsolvableVersionConflictException(Collection> paths) {
super("Could not resolve version conflict among " + toPaths(paths));
if (paths == null) {
this.paths = Collections.emptyList();
this.versions = Collections.emptyList();
} else {
this.paths = paths;
this.versions = new LinkedHashSet<>();
for (List path : paths) {
VersionConstraint constraint = path.get(path.size() - 1).getVersionConstraint();
if (constraint != null && constraint.getRange() != null) {
versions.add(constraint.toString());
}
}
}
}
private static String toPaths(Collection> paths) {
String result = "";
if (paths != null) {
Collection strings = new LinkedHashSet<>();
for (List path : paths) {
strings.add(toPath(path));
}
result = strings.toString();
}
return result;
}
private static String toPath(List path) {
StringBuilder buffer = new StringBuilder(256);
for (Iterator it = path.iterator(); it.hasNext(); ) {
DependencyNode node = it.next();
if (node.getDependency() == null) {
continue;
}
Artifact artifact = node.getDependency().getArtifact();
buffer.append(artifact.getGroupId());
buffer.append(':').append(artifact.getArtifactId());
buffer.append(':').append(artifact.getExtension());
if (artifact.getClassifier().length() > 0) {
buffer.append(':').append(artifact.getClassifier());
}
buffer.append(':').append(node.getVersionConstraint());
if (it.hasNext()) {
buffer.append(" -> ");
}
}
return buffer.toString();
}
/**
* Gets the paths leading to the conflicting dependencies.
*
* @return The (read-only) paths leading to the conflicting dependencies, never {@code null}.
*/
public Collection> getPaths() {
return paths;
}
/**
* Gets the conflicting version constraints of the dependency.
*
* @return The (read-only) conflicting version constraints, never {@code null}.
*/
public Collection getVersions() {
return versions;
}
}