1 package org.eclipse.aether.internal.impl.collect.df;
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22 import java.util.ArrayList;
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24 import org.eclipse.aether.graph.DependencyNode;
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32 final class NodeStack
33 {
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35 @SuppressWarnings( {"checkstyle:magicnumber" } )
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37 ArrayList<DependencyNode> nodes = new ArrayList<>( 96 );
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40 public DependencyNode top()
41 {
42 if ( nodes.isEmpty() )
43 {
44 throw new IllegalStateException( "stack empty" );
45 }
46 return nodes.get( nodes.size() - 1 );
47 }
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49 public void push( DependencyNode node )
50 {
51 nodes.add( node );
52 }
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54 public void pop()
55 {
56 if ( nodes.isEmpty() )
57 {
58 throw new IllegalStateException( "stack empty" );
59 }
60 nodes.remove( nodes.size() - 1 );
61 }
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63 public int size()
64 {
65 return nodes.size();
66 }
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68 public DependencyNode get( int index )
69 {
70 return nodes.get( index );
71 }
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73 @Override
74 public String toString()
75 {
76 return nodes.toString();
77 }
78
79 }