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19 package org.apache.maven.plugin;
20
21 import java.io.File;
22 import java.nio.file.Path;
23 import java.nio.file.Paths;
24 import java.util.HashMap;
25 import java.util.Map;
26
27 import org.apache.maven.api.MojoExecution;
28 import org.apache.maven.api.Project;
29 import org.apache.maven.api.Session;
30 import org.apache.maven.model.interpolation.reflection.ReflectionValueExtractor;
31 import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluationException;
32 import org.codehaus.plexus.component.configurator.expression.TypeAwareExpressionEvaluator;
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54 public class PluginParameterExpressionEvaluatorV4 implements TypeAwareExpressionEvaluator {
55 private final Session session;
56
57 private final MojoExecution mojoExecution;
58
59 private final Project project;
60
61 private final Path basedir;
62
63 private final Map<String, String> properties;
64
65 public PluginParameterExpressionEvaluatorV4(Session session, Project project) {
66 this(session, project, null);
67 }
68
69 public PluginParameterExpressionEvaluatorV4(Session session, Project project, MojoExecution mojoExecution) {
70 this.session = session;
71 this.mojoExecution = mojoExecution;
72 this.properties = session.getEffectiveProperties(project);
73 this.project = project;
74
75 Path basedir = null;
76
77 if (project != null) {
78 Path projectFile = project.getBasedir();
79 basedir = projectFile.toAbsolutePath();
80 }
81
82 if (basedir == null) {
83 basedir = session.getTopDirectory();
84 }
85
86 if (basedir == null) {
87 basedir = Paths.get(System.getProperty("user.dir"));
88 }
89
90 this.basedir = basedir;
91 }
92
93 @Override
94 public Object evaluate(String expr) throws ExpressionEvaluationException {
95 return evaluate(expr, null);
96 }
97
98 @Override
99 @SuppressWarnings("checkstyle:methodlength")
100 public Object evaluate(String expr, Class<?> type) throws ExpressionEvaluationException {
101 Object value = null;
102
103 if (expr == null) {
104 return null;
105 }
106
107 String expression = stripTokens(expr);
108 if (expression.equals(expr)) {
109 int index = expr.indexOf("${");
110 if (index >= 0) {
111 int lastIndex = expr.indexOf('}', index);
112 if (lastIndex >= 0) {
113 String retVal = expr.substring(0, index);
114
115 if ((index > 0) && (expr.charAt(index - 1) == '$')) {
116 retVal += expr.substring(index + 1, lastIndex + 1);
117 } else {
118 Object subResult = evaluate(expr.substring(index, lastIndex + 1));
119
120 if (subResult != null) {
121 retVal += subResult;
122 } else {
123 retVal += "$" + expr.substring(index + 1, lastIndex + 1);
124 }
125 }
126
127 retVal += evaluate(expr.substring(lastIndex + 1));
128 return retVal;
129 }
130 }
131
132
133 return expression.replace("$$", "$");
134 }
135
136 Map<String, Object> objects = new HashMap<>();
137 objects.put("session.", session);
138 objects.put("project.", project);
139 objects.put("mojo.", mojoExecution);
140 objects.put("settings.", session.getSettings());
141 for (Map.Entry<String, Object> ctx : objects.entrySet()) {
142 if (expression.startsWith(ctx.getKey())) {
143 try {
144 int pathSeparator = expression.indexOf('/');
145 if (pathSeparator > 0) {
146 String pathExpression = expression.substring(0, pathSeparator);
147 value = ReflectionValueExtractor.evaluate(pathExpression, ctx.getValue());
148 if (pathSeparator < expression.length() - 1) {
149 if (value instanceof Path) {
150 value = ((Path) value).resolve(expression.substring(pathSeparator + 1));
151 } else {
152 value = value + expression.substring(pathSeparator);
153 }
154 }
155 } else {
156 value = ReflectionValueExtractor.evaluate(expression, ctx.getValue());
157 }
158 break;
159 } catch (Exception e) {
160
161 throw new ExpressionEvaluationException(
162 "Error evaluating plugin parameter expression: " + expression, e);
163 }
164 }
165 }
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174
175 if (value != null && type != null && !(value instanceof String) && !isTypeCompatible(type, value)) {
176 value = null;
177 }
178
179 if (value == null) {
180
181
182 if (properties != null) {
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188 value = properties.get(expression);
189 }
190 }
191
192 if (value instanceof String) {
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195 String val = (String) value;
196
197 int exprStartDelimiter = val.indexOf("${");
198
199 if (exprStartDelimiter >= 0) {
200 if (exprStartDelimiter > 0) {
201 value = val.substring(0, exprStartDelimiter) + evaluate(val.substring(exprStartDelimiter));
202 } else {
203 value = evaluate(val.substring(exprStartDelimiter));
204 }
205 }
206 }
207
208 return value;
209 }
210
211 private static boolean isTypeCompatible(Class<?> type, Object value) {
212 if (type.isInstance(value)) {
213 return true;
214 }
215
216 return ((type.isPrimitive() || type.getName().startsWith("java.lang."))
217 && value.getClass().getName().startsWith("java.lang."));
218 }
219
220 private String stripTokens(String expr) {
221 if (expr.startsWith("${") && (expr.indexOf('}') == expr.length() - 1)) {
222 expr = expr.substring(2, expr.length() - 1);
223 }
224 return expr;
225 }
226
227 @Override
228 public File alignToBaseDirectory(File file) {
229
230
231 if (file != null) {
232 if (file.isAbsolute()) {
233
234 } else if (file.getPath().startsWith(File.separator)) {
235
236 file = file.getAbsoluteFile();
237 } else {
238
239 file = basedir.resolve(file.getPath())
240 .normalize()
241 .toAbsolutePath()
242 .toFile();
243 }
244 }
245 return file;
246 }
247 }