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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.util.Properties;
24
25 import org.apache.maven.execution.MavenSession;
26 import org.apache.maven.model.interpolation.reflection.ReflectionValueExtractor;
27 import org.apache.maven.plugin.descriptor.MojoDescriptor;
28 import org.apache.maven.plugin.descriptor.PluginDescriptor;
29 import org.apache.maven.project.MavenProject;
30 import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluationException;
31 import org.codehaus.plexus.component.configurator.expression.TypeAwareExpressionEvaluator;
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73 public class PluginParameterExpressionEvaluator implements TypeAwareExpressionEvaluator {
74 private MavenSession session;
75
76 private MojoExecution mojoExecution;
77
78 private MavenProject project;
79
80 private String basedir;
81
82 private Properties properties;
83
84 public PluginParameterExpressionEvaluator(MavenSession session) {
85 this(session, null);
86 }
87
88 public PluginParameterExpressionEvaluator(MavenSession session, MojoExecution mojoExecution) {
89 this.session = session;
90 this.mojoExecution = mojoExecution;
91 this.properties = new Properties();
92 this.project = session.getCurrentProject();
93
94
95
96
97
98 this.properties.putAll(session.getUserProperties());
99 this.properties.putAll(session.getSystemProperties());
100
101 String basedir = null;
102
103 if (project != null) {
104 File projectFile = project.getBasedir();
105
106
107 if (projectFile != null) {
108 basedir = projectFile.getAbsolutePath();
109 }
110 }
111
112 if (basedir == null) {
113 basedir = session.getExecutionRootDirectory();
114 }
115
116 if (basedir == null) {
117 basedir = System.getProperty("user.dir");
118 }
119
120 this.basedir = basedir;
121 }
122
123 @Override
124 public Object evaluate(String expr) throws ExpressionEvaluationException {
125 return evaluate(expr, null);
126 }
127
128 @Override
129 @SuppressWarnings("checkstyle:methodlength")
130 public Object evaluate(String expr, Class<?> type) throws ExpressionEvaluationException {
131 Object value = null;
132
133 if (expr == null) {
134 return null;
135 }
136
137 String expression = stripTokens(expr);
138 if (expression.equals(expr)) {
139 int index = expr.indexOf("${");
140 if (index >= 0) {
141 int lastIndex = expr.indexOf('}', index);
142 if (lastIndex >= 0) {
143 String retVal = expr.substring(0, index);
144
145 if ((index > 0) && (expr.charAt(index - 1) == '$')) {
146 retVal += expr.substring(index + 1, lastIndex + 1);
147 } else {
148 Object subResult = evaluate(expr.substring(index, lastIndex + 1));
149
150 if (subResult != null) {
151 retVal += subResult;
152 } else {
153 retVal += "$" + expr.substring(index + 1, lastIndex + 1);
154 }
155 }
156
157 retVal += evaluate(expr.substring(lastIndex + 1));
158 return retVal;
159 }
160 }
161
162
163 return expression.replace("$$", "$");
164 }
165
166 MojoDescriptor mojoDescriptor = mojoExecution.getMojoDescriptor();
167
168 if ("localRepository".equals(expression)) {
169 value = session.getLocalRepository();
170 } else if ("session".equals(expression)) {
171 value = session;
172 } else if (expression.startsWith("session")) {
173 try {
174 int pathSeparator = expression.indexOf('/');
175
176 if (pathSeparator > 0) {
177 String pathExpression = expression.substring(0, pathSeparator);
178 value = ReflectionValueExtractor.evaluate(pathExpression, session);
179 if (pathSeparator < expression.length() - 1) {
180 if (value instanceof Path) {
181 value = ((Path) value).resolve(expression.substring(pathSeparator + 1));
182 } else {
183 value = value + expression.substring(pathSeparator);
184 }
185 }
186 } else {
187 value = ReflectionValueExtractor.evaluate(expression, session);
188 }
189 } catch (Exception e) {
190
191 throw new ExpressionEvaluationException(
192 "Error evaluating plugin parameter expression: " + expression, e);
193 }
194 } else if ("reactorProjects".equals(expression)) {
195 value = session.getProjects();
196 } else if ("project".equals(expression)) {
197 value = project;
198 } else if ("executedProject".equals(expression)) {
199 value = project.getExecutionProject();
200 } else if (expression.startsWith("project") || expression.startsWith("pom")) {
201 try {
202 int pathSeparator = expression.indexOf('/');
203
204 if (pathSeparator > 0) {
205 String pathExpression = expression.substring(0, pathSeparator);
206 value = ReflectionValueExtractor.evaluate(pathExpression, project);
207 value = value + expression.substring(pathSeparator);
208 } else {
209 value = ReflectionValueExtractor.evaluate(expression, project);
210 }
211 } catch (Exception e) {
212
213 throw new ExpressionEvaluationException(
214 "Error evaluating plugin parameter expression: " + expression, e);
215 }
216 } else if (expression.equals("repositorySystemSession")) {
217 value = session.getRepositorySession();
218 } else if (expression.equals("mojo") || expression.equals("mojoExecution")) {
219 value = mojoExecution;
220 } else if (expression.startsWith("mojo")) {
221 try {
222 int pathSeparator = expression.indexOf('/');
223
224 if (pathSeparator > 0) {
225 String pathExpression = expression.substring(0, pathSeparator);
226 value = ReflectionValueExtractor.evaluate(pathExpression, mojoExecution);
227 value = value + expression.substring(pathSeparator);
228 } else {
229 value = ReflectionValueExtractor.evaluate(expression, mojoExecution);
230 }
231 } catch (Exception e) {
232
233 throw new ExpressionEvaluationException(
234 "Error evaluating plugin parameter expression: " + expression, e);
235 }
236 } else if (expression.equals("plugin")) {
237 value = mojoDescriptor.getPluginDescriptor();
238 } else if (expression.startsWith("plugin")) {
239 try {
240 int pathSeparator = expression.indexOf('/');
241
242 PluginDescriptor pluginDescriptor = mojoDescriptor.getPluginDescriptor();
243
244 if (pathSeparator > 0) {
245 String pathExpression = expression.substring(0, pathSeparator);
246 value = ReflectionValueExtractor.evaluate(pathExpression, pluginDescriptor);
247 value = value + expression.substring(pathSeparator);
248 } else {
249 value = ReflectionValueExtractor.evaluate(expression, pluginDescriptor);
250 }
251 } catch (Exception e) {
252 throw new ExpressionEvaluationException(
253 "Error evaluating plugin parameter expression: " + expression, e);
254 }
255 } else if ("settings".equals(expression)) {
256 value = session.getSettings();
257 } else if (expression.startsWith("settings")) {
258 try {
259 int pathSeparator = expression.indexOf('/');
260
261 if (pathSeparator > 0) {
262 String pathExpression = expression.substring(0, pathSeparator);
263 value = ReflectionValueExtractor.evaluate(pathExpression, session.getSettings());
264 value = value + expression.substring(pathSeparator);
265 } else {
266 value = ReflectionValueExtractor.evaluate(expression, session.getSettings());
267 }
268 } catch (Exception e) {
269
270 throw new ExpressionEvaluationException(
271 "Error evaluating plugin parameter expression: " + expression, e);
272 }
273 } else if ("basedir".equals(expression)) {
274 value = basedir;
275 } else if (expression.startsWith("basedir")) {
276 int pathSeparator = expression.indexOf('/');
277
278 if (pathSeparator > 0) {
279 value = basedir + expression.substring(pathSeparator);
280 }
281 }
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289
290
291 if (value != null && type != null && !(value instanceof String) && !isTypeCompatible(type, value)) {
292 value = null;
293 }
294
295 if (value == null) {
296
297
298 if (properties != null) {
299
300
301
302
303
304 value = properties.getProperty(expression);
305 }
306
307 if ((value == null) && ((project != null) && (project.getProperties() != null))) {
308 value = project.getProperties().getProperty(expression);
309 }
310 }
311
312 if (value instanceof String) {
313
314
315 String val = (String) value;
316
317 int exprStartDelimiter = val.indexOf("${");
318
319 if (exprStartDelimiter >= 0) {
320 if (exprStartDelimiter > 0) {
321 value = val.substring(0, exprStartDelimiter) + evaluate(val.substring(exprStartDelimiter));
322 } else {
323 value = evaluate(val.substring(exprStartDelimiter));
324 }
325 }
326 }
327
328 return value;
329 }
330
331 private static boolean isTypeCompatible(Class<?> type, Object value) {
332 if (type.isInstance(value)) {
333 return true;
334 }
335
336 return ((type.isPrimitive() || type.getName().startsWith("java.lang."))
337 && value.getClass().getName().startsWith("java.lang."));
338 }
339
340 private String stripTokens(String expr) {
341 if (expr.startsWith("${") && (expr.indexOf('}') == expr.length() - 1)) {
342 expr = expr.substring(2, expr.length() - 1);
343 }
344 return expr;
345 }
346
347 @Override
348 public File alignToBaseDirectory(File file) {
349
350
351 if (file != null) {
352 if (file.isAbsolute()) {
353
354 } else if (file.getPath().startsWith(File.separator)) {
355
356 file = file.getAbsoluteFile();
357 } else {
358
359 file = new File(new File(basedir, file.getPath()).toURI().normalize()).getAbsoluteFile();
360 }
361 }
362 return file;
363 }
364 }