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Spring Cloud Contract Shaded Dependencies
package org.eclipse.aether.util.graph.visitor;
/*
* 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.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.eclipse.aether.graph.DependencyFilter;
import org.eclipse.aether.graph.DependencyNode;
import org.eclipse.aether.graph.DependencyVisitor;
/**
* A dependency visitor that records all paths leading to nodes matching a certain filter criteria.
*/
public final class PathRecordingDependencyVisitor
implements DependencyVisitor
{
private final DependencyFilter filter;
private final List> paths;
private final Stack parents;
private final boolean excludeChildrenOfMatches;
/**
* Creates a new visitor that uses the specified filter to identify terminal nodes of interesting paths. The visitor
* will not search for paths going beyond an already matched node.
*
* @param filter The filter used to select terminal nodes of paths to record, may be {@code null} to match any node.
*/
public PathRecordingDependencyVisitor( DependencyFilter filter )
{
this( filter, true );
}
/**
* Creates a new visitor that uses the specified filter to identify terminal nodes of interesting paths.
*
* @param filter The filter used to select terminal nodes of paths to record, may be {@code null} to match any node.
* @param excludeChildrenOfMatches Flag controlling whether children of matched nodes should be excluded from the
* traversal, thereby ignoring any potential paths to other matching nodes beneath a matching ancestor
* node. If {@code true}, all recorded paths will have only one matching node (namely the terminal node),
* if {@code false} a recorded path can consist of multiple matching nodes.
*/
public PathRecordingDependencyVisitor( DependencyFilter filter, boolean excludeChildrenOfMatches )
{
this.filter = filter;
this.excludeChildrenOfMatches = excludeChildrenOfMatches;
paths = new ArrayList<>();
parents = new Stack<>();
}
/**
* Gets the filter being used to select terminal nodes.
*
* @return The filter being used or {@code null} if none.
*/
public DependencyFilter getFilter()
{
return filter;
}
/**
* Gets the paths leading to nodes matching the filter that have been recorded during the graph visit. A path is
* given as a sequence of nodes, starting with the root node of the graph and ending with a node that matched the
* filter.
*
* @return The recorded paths, never {@code null}.
*/
public List> getPaths()
{
return paths;
}
public boolean visitEnter( DependencyNode node )
{
boolean accept = filter == null || filter.accept( node, parents );
boolean hasDuplicateNodeInParent = parents.contains( node );
parents.push( node );
if ( accept )
{
DependencyNode[] path = new DependencyNode[parents.size()];
for ( int i = 0, n = parents.size(); i < n; i++ )
{
path[n - i - 1] = parents.get( i );
}
paths.add( Arrays.asList( path ) );
if ( excludeChildrenOfMatches )
{
return false;
}
}
return !hasDuplicateNodeInParent;
}
public boolean visitLeave( DependencyNode node )
{
parents.pop();
return true;
}
}