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package org.eclipse.aether.util.graph.transformer;
/*
* 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.util.Collection;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.aether.RepositoryException;
import org.eclipse.aether.util.artifact.JavaScopes;
import org.eclipse.aether.util.graph.transformer.ConflictResolver.ConflictContext;
import org.eclipse.aether.util.graph.transformer.ConflictResolver.ConflictItem;
import org.eclipse.aether.util.graph.transformer.ConflictResolver.ScopeSelector;
/**
* A scope selector for use with {@link ConflictResolver} that supports the scopes from {@link JavaScopes}. In general,
* this selector picks the widest scope present among conflicting dependencies where e.g. "compile" is wider than
* "runtime" which is wider than "test". If however a direct dependency is involved, its scope is selected.
*/
public final class JavaScopeSelector
extends ScopeSelector
{
/**
* Creates a new instance of this scope selector.
*/
public JavaScopeSelector()
{
}
@Override
public void selectScope( ConflictContext context )
throws RepositoryException
{
String scope = context.getWinner().getDependency().getScope();
if ( !JavaScopes.SYSTEM.equals( scope ) )
{
scope = chooseEffectiveScope( context.getItems() );
}
context.setScope( scope );
}
private String chooseEffectiveScope( Collection items )
{
Set scopes = new HashSet<>();
for ( ConflictItem item : items )
{
if ( item.getDepth() <= 1 )
{
return item.getDependency().getScope();
}
scopes.addAll( item.getScopes() );
}
return chooseEffectiveScope( scopes );
}
private String chooseEffectiveScope( Set scopes )
{
if ( scopes.size() > 1 )
{
scopes.remove( JavaScopes.SYSTEM );
}
String effectiveScope = "";
if ( scopes.size() == 1 )
{
effectiveScope = scopes.iterator().next();
}
else if ( scopes.contains( JavaScopes.COMPILE ) )
{
effectiveScope = JavaScopes.COMPILE;
}
else if ( scopes.contains( JavaScopes.RUNTIME ) )
{
effectiveScope = JavaScopes.RUNTIME;
}
else if ( scopes.contains( JavaScopes.PROVIDED ) )
{
effectiveScope = JavaScopes.PROVIDED;
}
else if ( scopes.contains( JavaScopes.TEST ) )
{
effectiveScope = JavaScopes.TEST;
}
return effectiveScope;
}
}