Source Code Cross Referenced for SignatureVisitor.java in  » Rule-Engine » drolls-Rule-Engine » org » drools » asm » signature » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Rule Engine » drolls Rule Engine » org.drools.asm.signature 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /***
002:         * ASM: a very small and fast Java bytecode manipulation framework
003:         * Copyright (c) 2000-2005 INRIA, France Telecom
004:         * All rights reserved.
005:         *
006:         * Redistribution and use in source and binary forms, with or without
007:         * modification, are permitted provided that the following conditions
008:         * are met:
009:         * 1. Redistributions of source code must retain the above copyright
010:         *    notice, this list of conditions and the following disclaimer.
011:         * 2. Redistributions in binary form must reproduce the above copyright
012:         *    notice, this list of conditions and the following disclaimer in the
013:         *    documentation and/or other materials provided with the distribution.
014:         * 3. Neither the name of the copyright holders nor the names of its
015:         *    contributors may be used to endorse or promote products derived from
016:         *    this software without specific prior written permission.
017:         *
018:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
019:         * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
020:         * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
021:         * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
022:         * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
023:         * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
024:         * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
025:         * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
026:         * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
027:         * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
028:         * THE POSSIBILITY OF SUCH DAMAGE.
029:         */package org.drools.asm.signature;
030:
031:        /**
032:         * A visitor to visit a generic signature. The methods of this interface must be
033:         * called in one of the three following orders (the last one is the only valid
034:         * order for a {@link SignatureVisitor} that is returned by a method of this
035:         * interface): <ul> <li><i>ClassSignature</i> = (
036:         * <tt>visitFormalTypeParameter</tt> 
037:         *   <tt>visitClassBound</tt>?
038:         * <tt>visitInterfaceBound</tt>* )* ( <tt>visitSuperClass</tt> 
039:         *   <tt>visitInterface</tt>* )</li>
040:         * <li><i>MethodSignature</i> = ( <tt>visitFormalTypeParameter</tt> 
041:         *   <tt>visitClassBound</tt>?
042:         * <tt>visitInterfaceBound</tt>* )* ( <tt>visitParameterType</tt>*
043:         * <tt>visitReturnType</tt> 
044:         *   <tt>visitExceptionType</tt>* )</li> <li><i>TypeSignature</i> =
045:         * <tt>visitBaseType</tt> | <tt>visitTypeVariable</tt> |
046:         * <tt>visitArrayType</tt> | (
047:         * <tt>visitClassType</tt> <tt>visitTypeArgument</tt>* (
048:         * <tt>visitInnerClassType</tt> <tt>visitTypeArgument</tt>* )*
049:         * <tt>visitEnd</tt> ) )</li> </ul>
050:         * 
051:         * @author Thomas Hallgren
052:         * @author Eric Bruneton
053:         */
054:        public interface SignatureVisitor {
055:
056:            /**
057:             * Wildcard for an "extends" type argument.
058:             */
059:            char EXTENDS = '+';
060:
061:            /**
062:             * Wildcard for a "super" type argument.
063:             */
064:            char SUPER = '-';
065:
066:            /**
067:             * Wildcard for a normal type argument.
068:             */
069:            char INSTANCEOF = '=';
070:
071:            /**
072:             * Visits a formal type parameter.
073:             * 
074:             * @param name the name of the formal parameter.
075:             */
076:            void visitFormalTypeParameter(String name);
077:
078:            /**
079:             * Visits the class bound of the last visited formal type parameter.
080:             * 
081:             * @return a non null visitor to visit the signature of the class bound.
082:             */
083:            SignatureVisitor visitClassBound();
084:
085:            /**
086:             * Visits an interface bound of the last visited formal type parameter.
087:             * 
088:             * @return a non null visitor to visit the signature of the interface bound.
089:             */
090:            SignatureVisitor visitInterfaceBound();
091:
092:            /**
093:             * Visits the type of the super class.
094:             * 
095:             * @return a non null visitor to visit the signature of the super class
096:             *         type.
097:             */
098:            SignatureVisitor visitSuperclass();
099:
100:            /**
101:             * Visits the type of an interface implemented by the class.
102:             * 
103:             * @return a non null visitor to visit the signature of the interface type.
104:             */
105:            SignatureVisitor visitInterface();
106:
107:            /**
108:             * Visits the type of a method parameter.
109:             * 
110:             * @return a non null visitor to visit the signature of the parameter type.
111:             */
112:            SignatureVisitor visitParameterType();
113:
114:            /**
115:             * Visits the return type of the method.
116:             * 
117:             * @return a non null visitor to visit the signature of the return type.
118:             */
119:            SignatureVisitor visitReturnType();
120:
121:            /**
122:             * Visits the type of a method exception.
123:             * 
124:             * @return a non null visitor to visit the signature of the exception type.
125:             */
126:            SignatureVisitor visitExceptionType();
127:
128:            /**
129:             * Visits a signature corresponding to a primitive type.
130:             * 
131:             * @param descriptor the descriptor of the primitive type, or 'V' for
132:             *        <tt>void</tt>.
133:             */
134:            void visitBaseType(char descriptor);
135:
136:            /**
137:             * Visits a signature corresponding to a type variable.
138:             * 
139:             * @param name the name of the type variable.
140:             */
141:            void visitTypeVariable(String name);
142:
143:            /**
144:             * Visits a signature corresponding to an array type.
145:             * 
146:             * @return a non null visitor to visit the signature of the array element
147:             *         type.
148:             */
149:            SignatureVisitor visitArrayType();
150:
151:            /**
152:             * Starts the visit of a signature corresponding to a class or interface
153:             * type.
154:             * 
155:             * @param name the internal name of the class or interface.
156:             */
157:            void visitClassType(String name);
158:
159:            /**
160:             * Visits an inner class.
161:             * 
162:             * @param name the local name of the inner class in its enclosing class.
163:             */
164:            void visitInnerClassType(String name);
165:
166:            /**
167:             * Visits an unbounded type argument of the last visited class or inner
168:             * class type.
169:             */
170:            void visitTypeArgument();
171:
172:            /**
173:             * Visits a type argument of the last visited class or inner class type.
174:             * 
175:             * @param wildcard '+', '-' or '='.
176:             * @return a non null visitor to visit the signature of the type argument.
177:             */
178:            SignatureVisitor visitTypeArgument(char wildcard);
179:
180:            /**
181:             * Ends the visit of a signature corresponding to a class or interface type.
182:             */
183:            void visitEnd();
184:        }
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