Source Code Cross Referenced for FieldSetJoinPointCompiler.java in  » Aspect-oriented » aspectwerkz-2.0 » org » codehaus » aspectwerkz » transform » inlining » compiler » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Aspect oriented » aspectwerkz 2.0 » org.codehaus.aspectwerkz.transform.inlining.compiler 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**************************************************************************************
002:         * Copyright (c) Jonas BonŽr, Alexandre Vasseur. All rights reserved.                 *
003:         * http://aspectwerkz.codehaus.org                                                    *
004:         * ---------------------------------------------------------------------------------- *
005:         * The software in this package is published under the terms of the LGPL license      *
006:         * a copy of which has been included with this distribution in the license.txt file.  *
007:         **************************************************************************************/package org.codehaus.aspectwerkz.transform.inlining.compiler;
008:
009:        import org.objectweb.asm.CodeVisitor;
010:        import org.objectweb.asm.Type;
011:
012:        import org.codehaus.aspectwerkz.transform.TransformationUtil;
013:        import org.codehaus.aspectwerkz.transform.inlining.compiler.AbstractJoinPointCompiler;
014:        import org.codehaus.aspectwerkz.transform.inlining.AsmHelper;
015:
016:        import java.lang.reflect.Modifier;
017:
018:        /**
019:         * A compiler that compiles/generates a class that represents a specific join point, a class which invokes the advices
020:         * and the target join point statically.
021:         *
022:         * @author <a href="mailto:jboner@codehaus.org">Jonas BonŽr </a>
023:         * @author <a href="mailto:alex AT gnilux DOT com">Alexandre Vasseur </a>
024:         */
025:        public class FieldSetJoinPointCompiler extends
026:                AbstractJoinPointCompiler {
027:
028:            /**
029:             * Creates a new join point compiler instance.
030:             *
031:             * @param model
032:             */
033:            FieldSetJoinPointCompiler(final CompilationInfo.Model model) {
034:                super (model);
035:            }
036:
037:            /**
038:             * Creates join point specific fields.
039:             */
040:            protected void createJoinPointSpecificFields() {
041:                String[] fieldNames = null;
042:                // create the field argument field
043:                Type fieldType = Type.getType(m_calleeMemberDesc);
044:                fieldNames = new String[1];
045:                String fieldName = ARGUMENT_FIELD + 0;
046:                fieldNames[0] = fieldName;
047:                m_cw.visitField(ACC_PRIVATE, fieldName, fieldType
048:                        .getDescriptor(), null, null);
049:                m_fieldNames = fieldNames;
050:
051:                m_cw.visitField(ACC_PRIVATE + ACC_STATIC, SIGNATURE_FIELD_NAME,
052:                        FIELD_SIGNATURE_IMPL_CLASS_SIGNATURE, null, null);
053:            }
054:
055:            /**
056:             * Creates the signature for the join point.
057:             * <p/>
058:             * FIXME signature field should NOT be of type Signature but of the specific type (update all refs as well)
059:             *
060:             * @param cv
061:             */
062:            protected void createSignature(final CodeVisitor cv) {
063:                cv.visitFieldInsn(GETSTATIC, m_joinPointClassName,
064:                        TARGET_CLASS_FIELD_NAME, CLASS_CLASS_SIGNATURE);
065:                cv.visitLdcInsn(new Integer(m_joinPointHash));
066:
067:                cv.visitMethodInsn(INVOKESTATIC, SIGNATURE_FACTORY_CLASS,
068:                        NEW_FIELD_SIGNATURE_METHOD_NAME,
069:                        NEW_FIELD_SIGNATURE_METHOD_SIGNATURE);
070:                cv.visitFieldInsn(PUTSTATIC, m_joinPointClassName,
071:                        SIGNATURE_FIELD_NAME,
072:                        FIELD_SIGNATURE_IMPL_CLASS_SIGNATURE);
073:            }
074:
075:            /**
076:             * Optimized implementation that does not retrieve the parameters from the join point instance but is passed
077:             * directly to the method from the input parameters in the 'invoke' method. Can only be used if no around advice
078:             * exists.
079:             *
080:             * @param cv
081:             * @param argStartIndex index on stack of first target method arg (0 or 1, depends of static target or not)
082:             */
083:            protected void createInlinedJoinPointInvocation(
084:                    final CodeVisitor cv, final boolean isOptimizedJoinPoint,
085:                    final int argStartIndex, final int joinPointIndex) {
086:
087:                // load the target instance (arg0 else not available for static target)
088:                if (!Modifier.isStatic(m_calleeMemberModifiers)) {
089:                    cv.visitVarInsn(ALOAD, 0);
090:                }
091:
092:                loadArgumentMemberFields(cv, argStartIndex);
093:
094:                // do we have a public field ? If so don't use the wrappers
095:                if (Modifier.isPublic(m_calleeMemberModifiers)) {
096:                    if (Modifier.isStatic(m_calleeMemberModifiers)) {
097:                        cv.visitFieldInsn(PUTSTATIC, m_calleeClassName,
098:                                m_calleeMemberName, m_calleeMemberDesc);
099:                    } else {
100:                        cv.visitFieldInsn(PUTFIELD, m_calleeClassName,
101:                                m_calleeMemberName, m_calleeMemberDesc);
102:                    }
103:                } else {
104:                    String joinPointName = null; // can be prefixed
105:                    joinPointName = m_calleeMemberName;
106:                    joinPointName = TransformationUtil.getWrapperMethodName(
107:                            joinPointName, m_calleeMemberDesc,
108:                            m_calleeClassName, PUTFIELD_WRAPPER_METHOD_PREFIX);
109:                    StringBuffer sig = new StringBuffer();
110:                    sig.append('(');
111:                    sig.append(m_calleeMemberDesc);
112:                    sig.append(')');
113:                    sig.append('V');
114:                    if (Modifier.isStatic(m_calleeMemberModifiers)) {
115:                        cv.visitMethodInsn(INVOKESTATIC, m_calleeClassName,
116:                                joinPointName, sig.toString());
117:                    } else {
118:                        cv.visitMethodInsn(INVOKEVIRTUAL, m_calleeClassName,
119:                                joinPointName, sig.toString());
120:                    }
121:                }
122:
123:                AsmHelper.addDefaultValue(cv, m_argumentTypes[0]);
124:            }
125:
126:            /**
127:             * Creates a call to the target join point, the parameter(s) to the join point are retrieved from the invocation
128:             * local join point instance.
129:             *
130:             * @param cv
131:             */
132:            protected void createJoinPointInvocation(final CodeVisitor cv) {
133:
134:                // load the target instance member field unless calleeMember is static
135:                if (!Modifier.isStatic(m_calleeMemberModifiers)) {
136:                    cv.visitVarInsn(ALOAD, 0);
137:                    cv.visitFieldInsn(GETFIELD, m_joinPointClassName,
138:                            CALLEE_INSTANCE_FIELD_NAME, m_calleeClassSignature);
139:                }
140:
141:                loadArguments(cv);
142:
143:                // do we have a public field ? If so don't use the wrappers
144:                if (Modifier.isPublic(m_calleeMemberModifiers)) {
145:                    if (Modifier.isStatic(m_calleeMemberModifiers)) {
146:                        cv.visitFieldInsn(PUTSTATIC, m_calleeClassName,
147:                                m_calleeMemberName, m_calleeMemberDesc);
148:                    } else {
149:                        cv.visitFieldInsn(PUTFIELD, m_calleeClassName,
150:                                m_calleeMemberName, m_calleeMemberDesc);
151:                    }
152:                } else {
153:                    String joinPointName = TransformationUtil
154:                            .getWrapperMethodName(m_calleeMemberName,
155:                                    m_calleeMemberDesc, m_calleeClassName,
156:                                    PUTFIELD_WRAPPER_METHOD_PREFIX);
157:                    StringBuffer putFieldWrapperDesc = new StringBuffer();
158:                    putFieldWrapperDesc.append('(');
159:                    putFieldWrapperDesc.append(m_calleeMemberDesc);
160:                    putFieldWrapperDesc.append(')');
161:                    putFieldWrapperDesc.append('V');
162:                    if (Modifier.isStatic(m_calleeMemberModifiers)) {
163:                        cv.visitMethodInsn(INVOKESTATIC, m_calleeClassName,
164:                                joinPointName, putFieldWrapperDesc.toString());
165:                    } else {
166:                        cv.visitMethodInsn(INVOKEVIRTUAL, m_calleeClassName,
167:                                joinPointName, putFieldWrapperDesc.toString());
168:                    }
169:                }
170:
171:                AsmHelper.addDefaultValue(cv, m_argumentTypes[0]);
172:            }
173:
174:            /**
175:             * Returns the join points return type.
176:             *
177:             * @return
178:             */
179:            protected Type getJoinPointReturnType() {
180:                return Type.getType(m_calleeMemberDesc);
181:            }
182:
183:            /**
184:             * Returns the join points argument type(s).
185:             *
186:             * @return
187:             */
188:            protected Type[] getJoinPointArgumentTypes() {
189:                return new Type[] { Type.getType(m_calleeMemberDesc) };
190:            }
191:
192:            /**
193:             * Creates the getRtti method
194:             */
195:            protected void createGetRttiMethod() {
196:                CodeVisitor cv = m_cw.visitMethod(ACC_PUBLIC,
197:                        GET_RTTI_METHOD_NAME, GET_RTTI_METHOD_SIGNATURE, null,
198:                        null);
199:
200:                // new FieldRttiImpl( .. )
201:                cv.visitTypeInsn(NEW, FIELD_RTTI_IMPL_CLASS_NAME);
202:                cv.visitInsn(DUP);
203:                cv.visitFieldInsn(GETSTATIC, m_joinPointClassName,
204:                        SIGNATURE_FIELD_NAME,
205:                        FIELD_SIGNATURE_IMPL_CLASS_SIGNATURE);
206:                cv.visitVarInsn(ALOAD, 0);
207:                cv.visitFieldInsn(GETFIELD, m_joinPointClassName,
208:                        CALLER_INSTANCE_FIELD_NAME, m_callerClassSignature);
209:                cv.visitVarInsn(ALOAD, 0);
210:                cv.visitFieldInsn(GETFIELD, m_joinPointClassName,
211:                        CALLEE_INSTANCE_FIELD_NAME, m_calleeClassSignature);
212:                cv.visitMethodInsn(INVOKESPECIAL, FIELD_RTTI_IMPL_CLASS_NAME,
213:                        INIT_METHOD_NAME, FIELD_RTTI_IMPL_INIT_SIGNATURE);
214:
215:                // set the value
216:                cv.visitInsn(DUP);
217:                if (AsmHelper.isPrimitive(m_returnType)) {
218:                    AsmHelper.prepareWrappingOfPrimitiveType(cv, m_returnType);
219:                    cv.visitVarInsn(ALOAD, 0);
220:                    cv.visitFieldInsn(GETFIELD, m_joinPointClassName,
221:                            RETURN_VALUE_FIELD_NAME, m_returnType
222:                                    .getDescriptor());
223:                    AsmHelper.wrapPrimitiveType(cv, m_returnType);
224:                } else {
225:                    cv.visitVarInsn(ALOAD, 0);
226:                    cv.visitFieldInsn(GETFIELD, m_joinPointClassName,
227:                            RETURN_VALUE_FIELD_NAME, m_returnType
228:                                    .getDescriptor());
229:                }
230:                cv.visitMethodInsn(INVOKEVIRTUAL, FIELD_RTTI_IMPL_CLASS_NAME,
231:                        SET_FIELD_VALUE_METHOD_NAME,
232:                        SET_FIELD_VALUE_METHOD_SIGNATURE);
233:
234:                cv.visitInsn(ARETURN);
235:                cv.visitMaxs(0, 0);
236:            }
237:
238:            /**
239:             * Creates the getSignature method.
240:             */
241:            protected void createGetSignatureMethod() {
242:                CodeVisitor cv = m_cw.visitMethod(ACC_PUBLIC,
243:                        GET_SIGNATURE_METHOD_NAME,
244:                        GET_SIGNATURE_METHOD_SIGNATURE, null, null);
245:                cv.visitFieldInsn(GETSTATIC, m_joinPointClassName,
246:                        SIGNATURE_FIELD_NAME,
247:                        FIELD_SIGNATURE_IMPL_CLASS_SIGNATURE);
248:                cv.visitInsn(ARETURN);
249:                cv.visitMaxs(0, 0);
250:            }
251:        }
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