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package org.boretti.drools.integration.drools5; |
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import java.text.SimpleDateFormat; |
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import java.util.Date; |
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import java.util.HashMap; |
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import java.util.Map; |
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import javax.annotation.Generated; |
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import org.apache.maven.plugin.logging.Log; |
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import org.boretti.drools.integration.drools5.annotations.DroolsService; |
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import org.drools.RuleBase; |
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import org.drools.StatelessSession; |
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import org.objectweb.asm.Label; |
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import org.objectweb.asm.Opcodes; |
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import org.objectweb.asm.AnnotationVisitor; |
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import org.objectweb.asm.ClassAdapter; |
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import org.objectweb.asm.ClassVisitor; |
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import org.objectweb.asm.FieldVisitor; |
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import org.objectweb.asm.MethodVisitor; |
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import org.objectweb.asm.Type; |
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class DroolsClassVisitor extends ClassAdapter { |
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private Log logger; |
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private String me; |
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@Override |
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public void visit(int version, int access, String name, String signature, |
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String superName, String[] interfaces) { |
55 | 0 | if (version<Opcodes.V1_6) { |
56 | 0 | allowed=false; |
57 | 0 | logger.warn("Version of the class "+name+" is not enough to be supported"); |
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} |
59 | 0 | else if ((access & Opcodes.ACC_INTERFACE)>0) { |
60 | 0 | allowed=false; |
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} |
62 | 0 | me = name; |
63 | 0 | super.visit(version, access, name, signature, superName, interfaces); |
64 | 0 | } |
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|
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@Override |
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public AnnotationVisitor visitAnnotation(String desc, boolean arg1) { |
68 | 0 | if (allowed){ |
69 | 0 | if (Type.getType(desc).getClassName().equals(Type.getType(DroolsService.class).getClassName())) { |
70 | 0 | annotation_ok=true; |
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} |
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} |
73 | 0 | return super.visitAnnotation(desc, arg1); |
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} |
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|
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@Override |
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public FieldVisitor visitField(int access, String name, String desc, |
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String signature, Object value) { |
79 | 0 | if (isNeedChange()) { |
80 | 0 | if (name.equals(DROOLS_FIELD_NAME)) allowed=false; |
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|
82 | 0 | return new DroolsCheckFieldVisitor(logger, super.visitField(access, name, desc, signature, value),this,name); |
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} |
84 | 0 | return super.visitField(access, name, desc, signature, value); |
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} |
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|
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@Override |
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public MethodVisitor visitMethod(int access, String name, String desc, |
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String signature, String[] value) { |
90 | 0 | MethodVisitor mv = super.visitMethod(access, name, desc, signature, value); |
91 | 0 | if (isNeedChange()) { |
92 | 0 | if (name.equals("<init>")) { |
93 | 0 | return new DroolsAddConstructorMethodVisitor(mv, access, name, desc,me,DROOLS_FIELD_NAME,DROOLS_FIELD_RULE); |
94 | 0 | } else if (name.startsWith("get")){ |
95 | 0 | String fieldName = name.substring(3).toUpperCase(); |
96 | 0 | if (fieldType.containsKey(fieldName)) { |
97 | 0 | byte b = fieldType.get(fieldName); |
98 | 0 | if (b==0) { |
99 | 0 | return new DroolsAddGeneratedGetMethodVisitor(mv, access, name, desc, me, DROOLS_FIELD_NAME, DROOLS_FIELD_RULE,DROOLS_METHOD_RUN); |
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} |
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} |
102 | 0 | } else if (name.startsWith("set")){ |
103 | 0 | String fieldName = name.substring(3).toUpperCase(); |
104 | 0 | if (!fieldType.containsKey(fieldName)) { |
105 | 0 | return new DroolsAddGeneratedSetMethodVisitor(mv, access, name, desc, me, DROOLS_FIELD_NAME); |
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} |
107 | 0 | } else if (name.startsWith("is")){ |
108 | 0 | String fieldName = name.substring(2).toUpperCase(); |
109 | 0 | if (fieldType.containsKey(fieldName)) { |
110 | 0 | byte b = fieldType.get(fieldName); |
111 | 0 | if (b==0) { |
112 | 0 | return new DroolsAddGeneratedGetMethodVisitor(mv, access, name, desc, me, DROOLS_FIELD_NAME, DROOLS_FIELD_RULE,DROOLS_METHOD_RUN); |
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} |
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} |
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} |
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} |
117 | 0 | return mv; |
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} |
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|
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@Override |
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public void visitEnd() { |
122 | 0 | if (isNeedChange()) { |
123 | 0 | FieldVisitor fv = super.visitField(Opcodes.ACC_PRIVATE, DROOLS_FIELD_NAME, Type.BOOLEAN_TYPE.getDescriptor(),null, null); |
124 | 0 | if (fv !=null) { |
125 | 0 | AnnotationVisitor av = fv.visitAnnotation(Type.getType(Generated.class).getDescriptor(), true); |
126 | 0 | AnnotationVisitor value = av.visitArray("value"); |
127 | 0 | value.visit("","Generated by Drools5IntegrationHelper Maven plugin"); |
128 | 0 | value.visitEnd(); |
129 | 0 | av.visit("date", new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssz").format(current)); |
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|
131 | 0 | av.visitEnd(); |
132 | 0 | fv.visitEnd(); |
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} |
134 | 0 | fv = super.visitField(Opcodes.ACC_PRIVATE, DROOLS_FIELD_RULE, Type.getType(RuleBase.class).getDescriptor(),null, null); |
135 | 0 | if (fv !=null) { |
136 | 0 | AnnotationVisitor av = fv.visitAnnotation(Type.getType(Generated.class).getDescriptor(), true); |
137 | 0 | AnnotationVisitor value = av.visitArray("value"); |
138 | 0 | value.visit("","Generated by Drools5IntegrationHelper Maven plugin"); |
139 | 0 | value.visitEnd(); |
140 | 0 | av.visit("date", new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssz").format(current)); |
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|
142 | 0 | av.visitEnd(); |
143 | 0 | fv.visitEnd(); |
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} |
145 | 0 | MethodVisitor mv= super.visitMethod(Opcodes.ACC_PRIVATE, DROOLS_METHOD_RUN, "()V", null, null); |
146 | 0 | AnnotationVisitor av = mv.visitAnnotation(Type.getType(Generated.class).getDescriptor(), true); |
147 | 0 | AnnotationVisitor value = av.visitArray("value"); |
148 | 0 | value.visit("","Generated by Drools5IntegrationHelper Maven plugin"); |
149 | 0 | value.visitEnd(); |
150 | 0 | av.visit("date", new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssz").format(current)); |
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|
152 | 0 | av.visitEnd(); |
153 | 0 | mv.visitCode(); |
154 | 0 | Label start = new Label(); |
155 | 0 | mv.visitLabel(start); |
156 | 0 | Label doIt = new Label(); |
157 | 0 | mv.visitVarInsn(Opcodes.ALOAD, 0); |
158 | 0 | mv.visitFieldInsn(Opcodes.GETFIELD, Type.getObjectType(me).getInternalName(), DROOLS_FIELD_NAME, Type.BOOLEAN_TYPE.getDescriptor()); |
159 | 0 | mv.visitJumpInsn(Opcodes.IFEQ, doIt); |
160 | 0 | mv.visitInsn(Opcodes.RETURN); |
161 | 0 | mv.visitLabel(doIt); |
162 | 0 | mv.visitFrame(Opcodes.F_SAME, 1,new Object[]{Type.getObjectType(me).getInternalName()}, 0, new Object[]{}); |
163 | 0 | mv.visitVarInsn(Opcodes.ALOAD, 0); |
164 | 0 | mv.visitFieldInsn(Opcodes.GETFIELD, Type.getObjectType(me).getInternalName(), DROOLS_FIELD_RULE, Type.getType(RuleBase.class).getDescriptor()); |
165 | 0 | mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getType(RuleBase.class).getInternalName(), "newStatelessSession", "()Lorg/drools/StatelessSession;"); |
166 | 0 | mv.visitInsn(Opcodes.DUP); |
167 | 0 | mv.visitLdcInsn(FIELD_NAME_LOGGER); |
168 | 0 | mv.visitVarInsn(Opcodes.ALOAD, 0); |
169 | 0 | mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getType(Object.class).getInternalName(), "getClass", "()Ljava/lang/Class;"); |
170 | 0 | mv.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getType(org.apache.log4j.Logger.class).getInternalName(), "getLogger", "(Ljava/lang/Class;)Lorg/apache/log4j/Logger;"); |
171 | 0 | mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getType(StatelessSession.class).getInternalName(), "setGlobal", "(Ljava/lang/String;Ljava/lang/Object;)V"); |
172 | 0 | mv.visitVarInsn(Opcodes.ALOAD, 0); |
173 | 0 | mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getType(StatelessSession.class).getInternalName(), "execute", "(Ljava/lang/Object;)V"); |
174 | 0 | mv.visitVarInsn(Opcodes.ALOAD, 0); |
175 | 0 | mv.visitInsn(Opcodes.ICONST_1); |
176 | 0 | mv.visitFieldInsn(Opcodes.PUTFIELD, Type.getObjectType(me).getInternalName(), DROOLS_FIELD_NAME, Type.BOOLEAN_TYPE.getDescriptor()); |
177 | 0 | mv.visitInsn(Opcodes.RETURN); |
178 | 0 | Label end = new Label(); |
179 | 0 | mv.visitLabel(end); |
180 | 0 | mv.visitLocalVariable("this", Type.getObjectType(me).getDescriptor(), null, start, end, 0); |
181 | 0 | mv.visitMaxs(4, 1); |
182 | 0 | mv.visitEnd(); |
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} |
184 | 0 | super.visitEnd(); |
185 | 0 | } |
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|
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private static final String FIELD_NAME_LOGGER = "droolsLogger"; |
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|
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private static final String DROOLS_FIELD_NAME="$drools"; |
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private static final String DROOLS_FIELD_RULE="$drools_rule"; |
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|
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private static final String DROOLS_METHOD_RUN="$drools_run"; |
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|
195 | 0 | private boolean allowed = true; |
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|
197 | 0 | private boolean annotation_ok=false; |
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|
199 | 0 | private Map<String,Byte> fieldType = new HashMap<String,Byte>(); |
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|
201 | 0 | private Date current = new Date(); |
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|
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public DroolsClassVisitor(Log logger,ClassVisitor arg0) { |
204 | 0 | super(arg0); |
205 | 0 | this.logger=logger; |
206 | 0 | } |
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public boolean isNeedChange() { |
209 | 0 | return allowed && annotation_ok; |
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} |
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|
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public boolean isAllowed() { |
213 | 0 | return allowed; |
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} |
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public void setAllowed(boolean allowed) { |
217 | 0 | this.allowed = allowed; |
218 | 0 | } |
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public Map<String, Byte> getFieldType() { |
224 | 0 | return fieldType; |
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} |
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public void setFieldType(Map<String, Byte> fieldType) { |
231 | 0 | this.fieldType = fieldType; |
232 | 0 | } |
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|
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} |