1 package org.eclipse.aether.internal.impl;
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22 import java.util.Arrays;
23 import java.util.Collections;
24 import java.util.List;
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26 import org.eclipse.aether.graph.Dependency;
27 import org.eclipse.aether.graph.DependencyCycle;
28 import org.eclipse.aether.graph.DependencyNode;
29 import org.eclipse.aether.util.artifact.ArtifactIdUtils;
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34 final class DefaultDependencyCycle
35 implements DependencyCycle
36 {
37
38 private final List<Dependency> dependencies;
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40 private final int cycleEntry;
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42 DefaultDependencyCycle( NodeStack nodes, int cycleEntry, Dependency dependency )
43 {
44
45 int offset = ( cycleEntry > 0 && nodes.get( 0 ).getDependency() == null ) ? 1 : 0;
46 Dependency[] dependencies = new Dependency[nodes.size() - offset + 1];
47 for ( int i = 0, n = dependencies.length - 1; i < n; i++ )
48 {
49 DependencyNode node = nodes.get( i + offset );
50 dependencies[i] = node.getDependency();
51
52 if ( dependencies[i] == null )
53 {
54 dependencies[i] = new Dependency( node.getArtifact(), null );
55 }
56 }
57 dependencies[dependencies.length - 1] = dependency;
58 this.dependencies = Collections.unmodifiableList( Arrays.asList( dependencies ) );
59 this.cycleEntry = cycleEntry;
60 }
61
62 public List<Dependency> getPrecedingDependencies()
63 {
64 return dependencies.subList( 0, cycleEntry );
65 }
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67 public List<Dependency> getCyclicDependencies()
68 {
69 return dependencies.subList( cycleEntry, dependencies.size() );
70 }
71
72 @Override
73 public String toString()
74 {
75 StringBuilder buffer = new StringBuilder( 256 );
76 for ( int i = 0, n = dependencies.size(); i < n; i++ )
77 {
78 if ( i > 0 )
79 {
80 buffer.append( " -> " );
81 }
82 buffer.append( ArtifactIdUtils.toVersionlessId( dependencies.get( i ).getArtifact() ) );
83 }
84 return buffer.toString();
85 }
86
87 }