1 package org.apache.maven.shared.dependency.graph.internal;
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22 import java.util.List;
23
24 import org.apache.maven.artifact.Artifact;
25 import org.apache.maven.shared.dependency.graph.DependencyNode;
26 import org.apache.maven.shared.dependency.graph.traversal.DependencyNodeVisitor;
27
28 public class DefaultDependencyNode
29 implements DependencyNode
30 {
31 private final Artifact artifact;
32
33 private final DependencyNode parent;
34
35 private final String premanagedVersion;
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37 private final String premanagedScope;
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39 private final String versionConstraint;
40
41 private List<DependencyNode> children;
42
43 public DefaultDependencyNode( DependencyNode parent, Artifact artifact, String premanagedVersion,
44 String premanagedScope, String versionConstraint )
45 {
46 this.parent = parent;
47 this.artifact = artifact;
48 this.premanagedVersion = premanagedVersion;
49 this.premanagedScope = premanagedScope;
50 this.versionConstraint = versionConstraint;
51 }
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60
61 public boolean accept( DependencyNodeVisitor visitor )
62 {
63 if ( visitor.visit( this ) )
64 {
65 for ( DependencyNode child : getChildren() )
66 {
67 if ( !child.accept( visitor ) )
68 {
69 break;
70 }
71 }
72 }
73
74 return visitor.endVisit( this );
75 }
76
77 public Artifact getArtifact()
78 {
79 return artifact;
80 }
81
82 public void setChildren( List<DependencyNode> children )
83 {
84 this.children = children;
85 }
86
87 public List<DependencyNode> getChildren()
88 {
89 return children;
90 }
91
92 public DependencyNode getParent()
93 {
94 return parent;
95 }
96
97 public String getPremanagedVersion()
98 {
99 return premanagedVersion;
100 }
101
102 public String getPremanagedScope()
103 {
104 return premanagedScope;
105 }
106
107 public String getVersionConstraint()
108 {
109 return versionConstraint;
110 }
111
112 public String toNodeString()
113 {
114 StringBuffer buffer = new StringBuffer();
115
116 buffer.append( artifact );
117
118 ItemAppender appender = new ItemAppender( buffer, " (", "; ", ")" );
119
120 if ( getPremanagedVersion() != null )
121 {
122 appender.append( "version managed from ", getPremanagedVersion() );
123 }
124
125 if ( getPremanagedScope() != null )
126 {
127 appender.append( "scope managed from ", getPremanagedScope() );
128 }
129
130 if ( getVersionConstraint() != null )
131 {
132 appender.append( "version selected from constraint ", getVersionConstraint() );
133 }
134
135 appender.flush();
136
137 return buffer.toString();
138 }
139
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143 private static class ItemAppender
144 {
145 private StringBuffer buffer;
146
147 private String startToken;
148
149 private String separatorToken;
150
151 private String endToken;
152
153 private boolean appended;
154
155 public ItemAppender( StringBuffer buffer, String startToken, String separatorToken, String endToken )
156 {
157 this.buffer = buffer;
158 this.startToken = startToken;
159 this.separatorToken = separatorToken;
160 this.endToken = endToken;
161
162 appended = false;
163 }
164
165 public ItemAppender append( String item1, String item2 )
166 {
167 appendToken();
168
169 buffer.append( item1 ).append( item2 );
170
171 return this;
172 }
173
174 public void flush()
175 {
176 if ( appended )
177 {
178 buffer.append( endToken );
179
180 appended = false;
181 }
182 }
183
184 private void appendToken()
185 {
186 buffer.append( appended ? separatorToken : startToken );
187
188 appended = true;
189 }
190 }
191 }