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46 package org.codehaus.groovy.ast;
47
48 import groovy.lang.Closure;
49 import groovy.lang.GString;
50 import groovy.lang.Range;
51 import groovy.lang.Reference;
52 import groovy.lang.Script;
53
54 import java.math.BigDecimal;
55 import java.math.BigInteger;
56 import java.util.List;
57 import java.util.Map;
58 import java.util.regex.Pattern;
59
60 import org.objectweb.asm.Opcodes;
61
62 /***
63 * This class is a Helper for ClassNode and classes handling ClassNodes.
64 * It does contain a set of predefined ClassNodes for the most used
65 * types and some code for cached ClassNode creation and basic
66 * ClassNode handling
67 *
68 * @author Jochen Theodorou
69 */
70 public class ClassHelper {
71
72
73 private static String[] names = new String[] {
74 boolean.class.getName(), char.class.getName(),
75 byte.class.getName(), short.class.getName(),
76 int.class.getName(), long.class.getName(),
77 double.class.getName(), float.class.getName(),
78 Object.class.getName(), Void.TYPE.getName(),
79 Closure.class.getName(), GString.class.getName(),
80 List.class.getName(), Map.class.getName(),
81 Range.class.getName(), Pattern.class.getName(),
82 Script.class.getName(), String.class.getName(),
83 Boolean.class.getName(), Character.class.getName(),
84 Byte.class.getName(), Short.class.getName(),
85 Integer.class.getName(), Long.class.getName(),
86 Double.class.getName(), Float.class.getName(),
87 BigDecimal.class.getName(), BigInteger.class.getName(),
88 Void.class.getName(), Reference.class.getName()
89 };
90
91 private static Class[] classes = new Class[] {
92 Object.class, Boolean.TYPE, Character.TYPE, Byte.TYPE, Short.TYPE,
93 Integer.TYPE, Long.TYPE, Double.TYPE, Float.TYPE, Void.TYPE,
94 Closure.class, GString.class, List.class, Map.class, Range.class,
95 Pattern.class, Script.class, String.class, Boolean.class,
96 Character.class, Byte.class, Short.class, Integer.class, Long.class,
97 Double.class, Float.class, BigDecimal.class, BigInteger.class, Void.class,
98 Reference.class
99 };
100
101 public static final ClassNode
102 DYNAMIC_TYPE = new ClassNode(Object.class), OBJECT_TYPE = DYNAMIC_TYPE,
103 VOID_TYPE = new ClassNode(Void.TYPE), CLOSURE_TYPE = new ClassNode(Closure.class),
104 GSTRING_TYPE = new ClassNode(GString.class), LIST_TYPE = new ClassNode(List.class),
105 MAP_TYPE = new ClassNode(Map.class), RANGE_TYPE = new ClassNode(Range.class),
106 PATTERN_TYPE = new ClassNode(Pattern.class), STRING_TYPE = new ClassNode(String.class),
107 SCRIPT_TYPE = new ClassNode(Script.class), REFERENCE_TYPE = new ClassNode(Reference.class),
108
109 boolean_TYPE = new ClassNode(boolean.class), char_TYPE = new ClassNode(char.class),
110 byte_TYPE = new ClassNode(byte.class), int_TYPE = new ClassNode(int.class),
111 long_TYPE = new ClassNode(long.class), short_TYPE = new ClassNode(short.class),
112 double_TYPE = new ClassNode(double.class), float_TYPE = new ClassNode(float.class),
113 Byte_TYPE = new ClassNode(Byte.class), Short_TYPE = new ClassNode(Short.class),
114 Integer_TYPE = new ClassNode(Integer.class), Long_TYPE = new ClassNode(Long.class),
115 Character_TYPE = new ClassNode(Character.class), Float_TYPE = new ClassNode(Float.class),
116 Double_TYPE = new ClassNode(Double.class), Boolean_TYPE = new ClassNode(Boolean.class),
117 BigInteger_TYPE = new ClassNode(java.math.BigInteger.class),
118 BigDecimal_TYPE = new ClassNode(java.math.BigDecimal.class),
119 void_WRAPPER_TYPE = new ClassNode(Void.class);
120
121
122 private static ClassNode[] types = new ClassNode[] {
123 OBJECT_TYPE,
124 boolean_TYPE, char_TYPE, byte_TYPE, short_TYPE,
125 int_TYPE, long_TYPE, double_TYPE, float_TYPE,
126 VOID_TYPE, CLOSURE_TYPE, GSTRING_TYPE,
127 LIST_TYPE, MAP_TYPE, RANGE_TYPE, PATTERN_TYPE,
128 SCRIPT_TYPE, STRING_TYPE, Boolean_TYPE, Character_TYPE,
129 Byte_TYPE, Short_TYPE, Integer_TYPE, Long_TYPE,
130 Double_TYPE, Float_TYPE, BigDecimal_TYPE, BigInteger_TYPE,
131 void_WRAPPER_TYPE, REFERENCE_TYPE
132 };
133
134
135 private static ClassNode[] numbers = new ClassNode[] {
136 char_TYPE, byte_TYPE, short_TYPE, int_TYPE, long_TYPE,
137 double_TYPE, float_TYPE, Short_TYPE, Byte_TYPE, Character_TYPE,
138 Integer_TYPE, Float_TYPE, Long_TYPE, Double_TYPE, BigInteger_TYPE,
139 BigDecimal_TYPE
140 };
141
142 protected static final ClassNode[] EMPTY_TYPE_ARRAY = {};
143
144 public static final String OBJECT = "java.lang.Object";
145
146
147 /***
148 * Creates an array of ClassNodes using an array of classes.
149 * For each of the given classes a new ClassNode will be
150 * created
151 * @see #make(Class)
152 * @param classes an array of classes used to create the ClassNodes
153 * @return an array of ClassNodes
154 */
155 public static ClassNode[] make(Class[] classes) {
156 ClassNode[] cns = new ClassNode[classes.length];
157 for (int i=0; i<cns.length; i++) {
158 cns[i] = make(classes[i]);
159 }
160
161 return cns;
162 }
163
164 /***
165 * Creates a ClassNode using a given class.
166 * A new ClassNode object is only created if the class
167 * is not one of the predefined ones
168 *
169 * @param c class used to created the ClassNode
170 * @return ClassNode instance created from the given class
171 */
172 public static ClassNode make(Class c) {
173 for (int i=0; i<classes.length; i++) {
174 if (c==classes[i]) return types[i];
175 }
176 if (c.isArray()) {
177 ClassNode cn = make(c.getComponentType());
178 return cn.makeArray();
179 }
180 ClassNode t = new ClassNode(c);
181 return t;
182 }
183
184 /***
185 * Creates a ClassNode using a given class.
186 * Unlike make(String) this method will not use the cache
187 * to create the ClassNode. This means to ClassNode created
188 * from this method using the same name will have a different
189 * reference
190 *
191 * @see #make(String)
192 * @param name of the class the ClassNode is representing
193 */
194 public static ClassNode makeWithoutCaching(String name) {
195 ClassNode cn = new ClassNode(name,Opcodes.ACC_PUBLIC,OBJECT_TYPE);
196 cn.isPrimaryNode = false;
197 return cn;
198 }
199
200 /***
201 * Creates a ClassNode using a given class.
202 * If the name is one of the predefined ClassNodes then the
203 * corresponding ClassNode instance will be returned. If the
204 * is null of of length 0 the dynamic type is returned
205 *
206 * @param name of the class the ClassNode is representing
207 */
208 public static ClassNode make(String name) {
209 if (name == null || name.length() == 0) return DYNAMIC_TYPE;
210
211 for (int i=0; i<classes.length; i++) {
212 String cname = classes[i].getName();
213 if (name.equals(cname)) return types[i];
214 }
215 return makeWithoutCaching(name);
216 }
217
218 /***
219 * Creates a ClassNode containing the wrapper of a ClassNode
220 * of primitive type. Any ClassNode representing a primitive
221 * type should be created using the predefined types used in
222 * class. The method will check the parameter for known
223 * references of ClassNode representing a primitive type. If
224 * Reference is found, then a ClassNode will be contained that
225 * represents the wrapper class. For exmaple for boolean, the
226 * wrapper class is java.lang.Boolean.
227 *
228 * If the parameter is no primitve type, the redirected
229 * ClassNode will be returned
230 *
231 * @see #make(Class)
232 * @see #make(String)
233 * @param cn the ClassNode containing a possible primitive type
234 */
235 public static ClassNode getWrapper(ClassNode cn) {
236 cn = cn.redirect();
237 if (!isPrimitiveType(cn)) return cn;
238 if (cn==boolean_TYPE) {
239 return Boolean_TYPE;
240 } else if (cn==byte_TYPE) {
241 return Byte_TYPE;
242 } else if (cn==char_TYPE) {
243 return Character_TYPE;
244 } else if (cn==short_TYPE) {
245 return Short_TYPE;
246 } else if (cn==int_TYPE) {
247 return Integer_TYPE;
248 } else if (cn==long_TYPE) {
249 return Long_TYPE;
250 } else if (cn==float_TYPE) {
251 return Float_TYPE;
252 } else if (cn==double_TYPE) {
253 return Double_TYPE;
254 } else if (cn==VOID_TYPE) {
255 return void_WRAPPER_TYPE;
256 }
257 else {
258 return cn;
259 }
260 }
261
262 /***
263 * Test to determine if a ClasNode is a primitve type.
264 * Note: this only works for ClassNodes created using a
265 * predefined ClassNode
266 *
267 * @see #make(Class)
268 * @see #make(String)
269 * @param cn the ClassNode containing a possible primitive type
270 * @return true if the ClassNode is a primitve type
271 */
272 public static boolean isPrimitiveType(ClassNode cn) {
273 return cn == boolean_TYPE ||
274 cn == char_TYPE ||
275 cn == byte_TYPE ||
276 cn == short_TYPE ||
277 cn == int_TYPE ||
278 cn == long_TYPE ||
279 cn == float_TYPE ||
280 cn == double_TYPE ||
281 cn == VOID_TYPE;
282 }
283
284 public static ClassNode makeReference() {
285 return make(Reference.class);
286 }
287
288 }