001: /*
002: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003: *
004: * This file is part of Resin(R) Open Source
005: *
006: * Each copy or derived work must preserve the copyright notice and this
007: * notice unmodified.
008: *
009: * Resin Open Source is free software; you can redistribute it and/or modify
010: * it under the terms of the GNU General Public License as published by
011: * the Free Software Foundation; either version 2 of the License, or
012: * (at your option) any later version.
013: *
014: * Resin Open Source is distributed in the hope that it will be useful,
015: * but WITHOUT ANY WARRANTY; without even the implied warranty of
016: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017: * of NON-INFRINGEMENT. See the GNU General Public License for more
018: * details.
019: *
020: * You should have received a copy of the GNU General Public License
021: * along with Resin Open Source; if not, write to the
022: *
023: * Free Software Foundation, Inc.
024: * 59 Temple Place, Suite 330
025: * Boston, MA 02111-1307 USA
026: *
027: * @author Scott Ferguson
028: */
029:
030: package com.caucho.bytecode;
031:
032: /**
033: * Represents an introspected java class.
034: */
035: abstract public class JClass extends JAnnotationObject implements JType {
036: public static final JClass VOID = new JClassWrapper(void.class);
037: public static final JClass BOOLEAN = new JClassWrapper(
038: boolean.class);
039: public static final JClass BYTE = new JClassWrapper(byte.class);
040: public static final JClass SHORT = new JClassWrapper(short.class);
041: public static final JClass INT = new JClassWrapper(int.class);
042: public static final JClass LONG = new JClassWrapper(long.class);
043: public static final JClass FLOAT = new JClassWrapper(float.class);
044: public static final JClass DOUBLE = new JClassWrapper(double.class);
045: public static final JClass CHAR = new JClassWrapper(char.class);
046: public static final JClass STRING = new JClassWrapper(String.class);
047: public static final JClass OBJECT = new JClassWrapper(Object.class);
048:
049: /**
050: * Returns the class name.
051: */
052: abstract public String getName();
053:
054: /**
055: * Returns the Java class.
056: */
057: public Class getJavaClass() {
058: try {
059: ClassLoader loader = Thread.currentThread()
060: .getContextClassLoader();
061:
062: return Class.forName(getName(), false, loader);
063: } catch (Exception e) {
064: throw new RuntimeException(e);
065: }
066: }
067:
068: /**
069: * Returns the parameter types.
070: */
071: public JType[] getActualTypeArguments() {
072: return new JType[0];
073: }
074:
075: /**
076: * Returns the raw type.
077: */
078: public JClass getRawType() {
079: return this ;
080: }
081:
082: /**
083: * Returns true for a primitive class.
084: */
085: abstract public boolean isPrimitive();
086:
087: /**
088: * Returns true for a public class.
089: */
090: abstract public boolean isPublic();
091:
092: /**
093: * Returns true for an abstract class
094: */
095: abstract public boolean isAbstract();
096:
097: /**
098: * Returns true for a final class
099: */
100: abstract public boolean isFinal();
101:
102: /**
103: * Returns true for an interface
104: */
105: abstract public boolean isInterface();
106:
107: /**
108: * Returns the superclass.
109: */
110: abstract public JClass getSuperClass();
111:
112: /**
113: * Returns the interfaces.
114: */
115: abstract public JClass[] getInterfaces();
116:
117: /**
118: * Returns true for an array class.
119: */
120: abstract public boolean isArray();
121:
122: /**
123: * Returns the component for a class.
124: */
125: public JClass getComponentType() {
126: return null;
127: }
128:
129: /**
130: * Returns true if the jClass is assignable to the class.
131: */
132: abstract public boolean isAssignableTo(Class cl);
133:
134: /**
135: * Returns true if the jClass is assignable to the class.
136: */
137: abstract public boolean isAssignableFrom(Class cl);
138:
139: /**
140: * Returns true if the jClass is assignable to the class.
141: */
142: abstract public boolean isAssignableFrom(JClass cl);
143:
144: /**
145: * Returns the declared methods
146: */
147: abstract public JMethod[] getDeclaredMethods();
148:
149: /**
150: * Returns the public methods
151: */
152: abstract public JMethod[] getMethods();
153:
154: /**
155: * Returns the constructors.
156: */
157: abstract public JMethod[] getConstructors();
158:
159: /**
160: * Returns a matching constructor.
161: */
162: public JMethod getConstructor(JClass[] param) {
163: JMethod[] ctors = getConstructors();
164:
165: loop: for (int i = 0; i < ctors.length; i++) {
166: JClass[] args = ctors[i].getParameterTypes();
167:
168: if (args.length != param.length)
169: continue loop;
170:
171: for (int j = 0; j < args.length; j++)
172: if (!args[i].equals(param[j]))
173: continue loop;
174:
175: return ctors[i];
176: }
177:
178: return null;
179: }
180:
181: /**
182: * Returns the matching method.
183: */
184: abstract public JMethod getMethod(String name, JClass[] param);
185:
186: /**
187: * Returns the declared fields
188: */
189: abstract public JField[] getDeclaredFields();
190:
191: /**
192: * Returns the fields
193: */
194: abstract public JField[] getFields();
195:
196: /**
197: * Returns the printable name.
198: */
199: public String getPrintName() {
200: if (isArray())
201: return getComponentType().getPrintName() + "[]";
202: else
203: return getName().replace('$', '.');
204: }
205:
206: /**
207: * Returns a printable version of a class.
208: */
209: public String getShortName() {
210: if (isArray())
211: return getComponentType().getShortName() + "[]";
212: else {
213: String name = getName().replace('$', '.');
214:
215: int p = name.lastIndexOf('.');
216:
217: if (p >= 0)
218: return name.substring(p + 1);
219: else
220: return name;
221: }
222: }
223:
224: /**
225: * Returns the hash code
226: */
227: public int hashCode() {
228: return getName().hashCode();
229: }
230:
231: /**
232: * Returns true if equals.
233: */
234: public boolean equals(Object o) {
235: if (o == this )
236: return true;
237: else if (o == null || getClass() != o.getClass())
238: return false;
239:
240: JClass jClass = (JClass) o;
241:
242: // note that the equality test doesn't include the class loader
243: return getName().equals(jClass.getName());
244: }
245:
246: public String toString() {
247: return "JClass[" + getName() + "]";
248: }
249: }
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