org.eclipse.aether.util.graph.traverser.StaticDependencyTraverser Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2010, 2011 Sonatype, Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Sonatype, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.aether.util.graph.traverser;
import org.eclipse.aether.collection.DependencyCollectionContext;
import org.eclipse.aether.collection.DependencyTraverser;
import org.eclipse.aether.graph.Dependency;
/**
* A dependency traverser which always or never traverses children.
*/
public final class StaticDependencyTraverser
implements DependencyTraverser
{
private final boolean traverse;
/**
* Creates a new traverser with the specified traversal behavior.
*
* @param traverse {@code true} to traverse all dependencies, {@code false} to never traverse.
*/
public StaticDependencyTraverser( boolean traverse )
{
this.traverse = traverse;
}
public boolean traverseDependency( Dependency dependency )
{
return traverse;
}
public DependencyTraverser deriveChildTraverser( DependencyCollectionContext context )
{
return this;
}
@Override
public boolean equals( Object obj )
{
if ( this == obj )
{
return true;
}
else if ( null == obj || !getClass().equals( obj.getClass() ) )
{
return false;
}
StaticDependencyTraverser that = (StaticDependencyTraverser) obj;
return traverse == that.traverse;
}
@Override
public int hashCode()
{
int hash = getClass().hashCode();
hash = hash * 31 + ( traverse ? 1 : 0 );
return hash;
}
}