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The application programming interface for the repository system.
/*
* 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.graph;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.aether.artifact.Artifact;
import org.eclipse.aether.repository.RemoteRepository;
import org.eclipse.aether.version.Version;
import org.eclipse.aether.version.VersionConstraint;
import static java.util.Objects.requireNonNull;
/**
* A node within a dependency graph.
*/
public final class DefaultDependencyNode implements DependencyNode {
private List children;
private Dependency dependency;
private Artifact artifact;
private List relocations;
private Collection aliases;
private VersionConstraint versionConstraint;
private Version version;
private byte managedBits;
private List repositories;
private String context;
private Map data;
/**
* Creates a new node with the specified dependency.
*
* @param dependency The dependency associated with this node, may be {@code null} for a root node.
*/
public DefaultDependencyNode(Dependency dependency) {
this.dependency = dependency;
artifact = (dependency != null) ? dependency.getArtifact() : null;
children = new ArrayList<>(0);
aliases = Collections.emptyList();
relocations = Collections.emptyList();
repositories = Collections.emptyList();
context = "";
data = Collections.emptyMap();
}
/**
* Creates a new root node with the specified artifact as its label. Note that the new node has no dependency, i.e.
* {@link #getDependency()} will return {@code null}. Put differently, the specified artifact will not be subject to
* dependency collection/resolution.
*
* @param artifact The artifact to use as label for this node, may be {@code null}.
*/
public DefaultDependencyNode(Artifact artifact) {
this.artifact = artifact;
children = new ArrayList<>(0);
aliases = Collections.emptyList();
relocations = Collections.emptyList();
repositories = Collections.emptyList();
context = "";
data = Collections.emptyMap();
}
/**
* Creates a mostly shallow clone of the specified node. The new node has its own copy of any custom data and
* initially no children.
*
* @param node The node to copy, must not be {@code null}.
*/
public DefaultDependencyNode(DependencyNode node) {
dependency = node.getDependency();
artifact = node.getArtifact();
children = new ArrayList<>(0);
setAliases(node.getAliases());
setRequestContext(node.getRequestContext());
setManagedBits(node.getManagedBits());
setRelocations(node.getRelocations());
setRepositories(node.getRepositories());
setVersion(node.getVersion());
setVersionConstraint(node.getVersionConstraint());
Map data = node.getData();
setData(data.isEmpty() ? null : new HashMap<>(data));
}
public List getChildren() {
return children;
}
public void setChildren(List children) {
if (children == null) {
this.children = new ArrayList<>(0);
} else {
this.children = children;
}
}
public Dependency getDependency() {
return dependency;
}
public Artifact getArtifact() {
return artifact;
}
public void setArtifact(Artifact artifact) {
if (dependency == null) {
throw new IllegalStateException("node does not have a dependency");
}
dependency = dependency.setArtifact(artifact);
this.artifact = dependency.getArtifact();
}
public List getRelocations() {
return relocations;
}
/**
* Sets the sequence of relocations that was followed to resolve this dependency's artifact.
*
* @param relocations The sequence of relocations, may be {@code null}.
*/
public void setRelocations(List relocations) {
if (relocations == null || relocations.isEmpty()) {
this.relocations = Collections.emptyList();
} else {
this.relocations = relocations;
}
}
public Collection getAliases() {
return aliases;
}
/**
* Sets the known aliases for this dependency's artifact.
*
* @param aliases The known aliases, may be {@code null}.
*/
public void setAliases(Collection aliases) {
if (aliases == null || aliases.isEmpty()) {
this.aliases = Collections.emptyList();
} else {
this.aliases = aliases;
}
}
public VersionConstraint getVersionConstraint() {
return versionConstraint;
}
/**
* Sets the version constraint that was parsed from the dependency's version declaration.
*
* @param versionConstraint The version constraint for this node, may be {@code null}.
*/
public void setVersionConstraint(VersionConstraint versionConstraint) {
this.versionConstraint = versionConstraint;
}
public Version getVersion() {
return version;
}
/**
* Sets the version that was selected for the dependency's target artifact.
*
* @param version The parsed version, may be {@code null}.
*/
public void setVersion(Version version) {
this.version = version;
}
public void setScope(String scope) {
if (dependency == null) {
throw new IllegalStateException("node does not have a dependency");
}
dependency = dependency.setScope(scope);
}
public void setOptional(Boolean optional) {
if (dependency == null) {
throw new IllegalStateException("node does not have a dependency");
}
dependency = dependency.setOptional(optional);
}
public int getManagedBits() {
return managedBits;
}
/**
* Sets a bit field indicating which attributes of this node were subject to dependency management.
*
* @param managedBits The bit field indicating the managed attributes or {@code 0} if dependency management wasn't
* applied.
*/
public void setManagedBits(int managedBits) {
this.managedBits = (byte) (managedBits & 0x1F);
}
public List getRepositories() {
return repositories;
}
/**
* Sets the remote repositories from which this node's artifact shall be resolved.
*
* @param repositories The remote repositories to use for artifact resolution, may be {@code null}.
*/
public void setRepositories(List repositories) {
if (repositories == null || repositories.isEmpty()) {
this.repositories = Collections.emptyList();
} else {
this.repositories = repositories;
}
}
public String getRequestContext() {
return context;
}
public void setRequestContext(String context) {
this.context = (context != null) ? context : "";
}
public Map getData() {
return data;
}
public void setData(Map data) {
if (data == null) {
this.data = Collections.emptyMap();
} else {
this.data = data;
}
}
public void setData(Object key, Object value) {
requireNonNull(key, "key cannot be null");
if (value == null) {
if (!data.isEmpty()) {
data.remove(key);
if (data.isEmpty()) {
data = Collections.emptyMap();
}
}
} else {
if (data.isEmpty()) {
data = new HashMap<>(1, 2); // nodes can be numerous so let's be space conservative
}
data.put(key, value);
}
}
public boolean accept(DependencyVisitor visitor) {
if (visitor.visitEnter(this)) {
for (DependencyNode child : children) {
if (!child.accept(visitor)) {
break;
}
}
}
return visitor.visitLeave(this);
}
@Override
public String toString() {
Dependency dep = getDependency();
if (dep == null) {
return String.valueOf(getArtifact());
}
return dep.toString();
}
}