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35 package org.codehaus.groovy.ast;
36
37 import groovy.lang.GroovyClassLoader;
38
39 import java.security.CodeSource;
40 import java.util.ArrayList;
41 import java.util.HashMap;
42 import java.util.Iterator;
43 import java.util.List;
44 import java.util.Map;
45
46 import org.codehaus.groovy.classgen.ClassGeneratorException;
47 import org.codehaus.groovy.control.CompilationFailedException;
48 import org.codehaus.groovy.control.CompilerConfiguration;
49
50 /***
51 * Represents the entire contents of a compilation step which consists of one
52 * or more {@link ModuleNode}instances
53 *
54 * @author <a href="mailto:james@coredevelopers.net">James Strachan </a>
55 * @version $Revision: 1.14 $
56 */
57 public class CompileUnit {
58
59 private List modules = new ArrayList();
60 private Map classes = new HashMap();
61 private CompilerConfiguration config;
62 private ClassLoader classLoader;
63 private CodeSource codeSource;
64 private Map cachedClasses = new HashMap();
65
66 public static final Object NO_CLASS = new Object();
67
68
69 public CompileUnit(ClassLoader classLoader, CompilerConfiguration config) {
70 this(classLoader, null, config);
71 }
72
73 public CompileUnit(ClassLoader classLoader, CodeSource codeSource, CompilerConfiguration config) {
74 this.classLoader = classLoader;
75 this.config = config;
76 this.codeSource = codeSource;
77 }
78
79 public List getModules() {
80 return modules;
81 }
82
83 public void addModule(ModuleNode node) {
84 modules.add(node);
85 node.setUnit(this);
86 addClasses(node.classes);
87 }
88
89 /***
90 * @return the ClassNode for the given qualified name or returns null if
91 * the name does not exist in the current compilation unit
92 * (ignoring the .class files on the classpath)
93 */
94 public ClassNode getClass(String name) {
95 return (ClassNode) classes.get(name);
96 }
97
98 /***
99 * @return a list of all the classes in each module in the compilation unit
100 */
101 public List getClasses() {
102 List answer = new ArrayList();
103 for (Iterator iter = modules.iterator(); iter.hasNext();) {
104 ModuleNode module = (ModuleNode) iter.next();
105 answer.addAll(module.getClasses());
106 }
107 return answer;
108 }
109
110 public CompilerConfiguration getConfig() {
111 return config;
112 }
113
114 public ClassLoader getClassLoader() {
115 return classLoader;
116 }
117
118 public CodeSource getCodeSource() {
119 return codeSource;
120 }
121
122
123 /***
124 * Loads a class on the compile classpath so that it can be introspected
125 *
126 * @param type
127 * @return @throws
128 * ClassNotFoundException
129 */
130 public Class loadClass(String type) throws ClassNotFoundException {
131 Object obj = cachedClasses.get(type);
132 if ( obj == NO_CLASS ) {
133 throw new ClassNotFoundException(type);
134 }
135 if ( obj != null) {
136 return (Class)obj;
137 }
138
139 Class answer = null;
140 ClassLoader lastLoader = getClassLoader();
141 try {
142 answer = lastLoader.loadClass(type);
143 } catch (ClassNotFoundException e) {
144 Throwable cause = e.getCause();
145 if (cause !=null && cause instanceof CompilationFailedException){
146 throw new ClassGeneratorException("Error when compiling class: " + type + ". Reason: " + cause, cause);
147 }
148 } catch (NoClassDefFoundError e) {
149
150 }
151
152 try {
153 ClassLoader loader = Thread.currentThread().getContextClassLoader();
154 if ( answer == null && loader != lastLoader
155 lastLoader = loader;
156 answer = loader.loadClass(type);
157 }
158 }
159 catch (ClassNotFoundException e1) {
160 Throwable cause = e1.getCause();
161 if (cause !=null && cause instanceof CompilationFailedException){
162 throw new ClassGeneratorException("Error when compiling class: " + type + ". Reason: " + cause, cause);
163 }
164 } catch (NoClassDefFoundError e) {
165
166 }
167
168
169 try {
170 ClassLoader loader = getClass().getClassLoader();
171 if ( answer == null && loader != lastLoader) {
172 lastLoader = loader;
173 answer = loader.loadClass(type);
174 }
175 }
176 catch (ClassNotFoundException e2) {
177 Throwable cause = e2.getCause();
178 if (cause !=null && cause instanceof CompilationFailedException){
179 throw new ClassGeneratorException("Error when compiling class: " + type + ". Reason: " + cause, cause);
180 }
181 }
182 catch (NoClassDefFoundError e) {
183
184 }
185
186 try {
187 if (answer == null ) {
188 answer = Class.forName(type);
189 }
190 }
191 catch (ClassNotFoundException e2) {
192 Throwable cause = e2.getCause();
193 if (cause !=null && cause instanceof CompilationFailedException){
194 throw new ClassGeneratorException("Error when compiling class: " + type + ". Reason: " + cause, cause);
195 }
196 }
197 catch (NoClassDefFoundError e) {
198
199 }
200
201 if ( answer == null ) {
202 cachedClasses.put(type,NO_CLASS);
203 throw new ClassNotFoundException(type);
204 } else if (answer==GroovyClassLoader.PARSING.class){
205
206 } else {
207 if (!type.equals(answer.getName())) {
208 cachedClasses.put(type,NO_CLASS);
209 System.out.println("Mismatch: answer.getName() = " + answer.getName() + ", type = " + type);
210 throw new ClassNotFoundException(type);
211 }
212 cachedClasses.put(type,answer);
213 }
214
215 return answer;
216 }
217
218
219 /***
220 * Appends all of the fully qualified class names in this
221 * module into the given map
222 */
223 void addClasses(List classList) {
224 for (Iterator iter = classList.iterator(); iter.hasNext();) {
225 addClass((ClassNode) iter.next());
226 }
227 }
228
229 /***
230 * Adds a class to the unit.
231 */
232 public void addClass(ClassNode node) {
233 String name = node.getName();
234 if (classes.containsKey(name)) {
235 throw new RuntimeException(
236 "Error: duplicate class declaration for name: " + name + " and class: " + node);
237 }
238 classes.put(name, node);
239 }
240
241 }